Capillary permeability. Medical search

The property of blood capillary ENDOTHELIUM that allows for the selective exchange of substances between the blood and surrounding tissues and through membranous barriers such as the BLOOD-AIR BARRIER; BLOOD-AQUEOUS BARRIER; BLOOD-BRAIN BARRIER; BLOOD-NERVE BARRIER; BLOOD-RETINAL BARRIER; and BLOOD-TESTIS BARRIER. Small lipid-soluble molecules such as carbon dioxide and oxygen move freely by diffusion. Water and water-soluble molecules cannot pass through the endothelial walls and are dependent on microscopic pores. These pores show narrow areas (TIGHT JUNCTIONS) which may limit large molecule movement.

The minute vessels that connect the arterioles and venules.

One of the HISTAMINE H1 ANTAGONISTS with little sedative action. It is used in treatment of hay fever, rhinitis, allergic dermatoses, and pruritus.

A condition characterized by recurring episodes of fluid leaking from capillaries into extra-vascular compartments causing hematocrit to rise precipitously. If not treated, generalized vascular leak can lead to generalized EDEMA; SHOCK; cardiovascular collapse; and MULTIPLE ORGAN FAILURE.

Property of membranes and other structures to permit passage of light, heat, gases, liquids, metabolites, and mineral ions.

Normal human serum albumin mildly iodinated with radioactive iodine (131-I) which has a half-life of 8 days, and emits beta and gamma rays. It is used as a diagnostic aid in blood volume determination. (from Merck Index, 11th ed)

The widespread involvement of the skin by a scaly, erythematous dermatitis occurring either as a secondary or reactive process to an underlying cutaneous disorder (e.g., atopic dermatitis, psoriasis, etc.), or as a primary or idiopathic disease. It is often associated with the loss of hair and nails, hyperkeratosis of the palms and soles, and pruritus. (From Dorland, 27th ed)

One of the PENICILLINS which is resistant to PENICILLINASE.

A glucocorticoid with the general properties of corticosteroids. It has been used by mouth in the treatment of all conditions in which corticosteroid therapy is indicated except adrenal-deficiency states for which its lack of sodium-retaining properties makes it less suitable than HYDROCORTISONE with supplementary FLUDROCORTISONE. (From Martindale, The Extra Pharmacopoeia, 30th ed, p737)

Excessive accumulation of extravascular fluid in the lung, an indication of a serious underlying disease or disorder. Pulmonary edema prevents efficient PULMONARY GAS EXCHANGE in the PULMONARY ALVEOLI, and can be life-threatening.

Abnormal fluid accumulation in TISSUES or body cavities. Most cases of edema are present under the SKIN in SUBCUTANEOUS TISSUE.

A major protein in the BLOOD. It is important in maintaining the colloidal osmotic pressure and transporting large organic molecules.

A quality of cell membranes which permits the passage of solvents and solutes into and out of cells.

A complication of OVULATION INDUCTION in infertility treatment. It is graded by the severity of symptoms which include OVARY enlargement, multiple OVARIAN FOLLICLES; OVARIAN CYSTS; ASCITES; and generalized EDEMA. The full-blown syndrome may lead to RENAL FAILURE, respiratory distress, and even DEATH. Increased capillary permeability is caused by the vasoactive substances, such as VASCULAR ENDOTHELIAL GROWTH FACTORS, secreted by the overly-stimulated OVARIES.

Volume of PLASMA in the circulation. It is usually measured by INDICATOR DILUTION TECHNIQUES.

A highly-sensitive (in the picomolar range, which is 10,000-fold more sensitive than conventional electrophoresis) and efficient technique that allows separation of PROTEINS; NUCLEIC ACIDS; and CARBOHYDRATES. (Segen, Dictionary of Modern Medicine, 1992)

A phthalic indicator dye that appears yellow-green in normal tear film and bright green in a more alkaline medium such as the aqueous humor.

An amine derived by enzymatic decarboxylation of HISTIDINE. It is a powerful stimulant of gastric secretion, a constrictor of bronchial smooth muscle, a vasodilator, and also a centrally acting neurotransmitter.

Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.

Volume of circulating BLOOD. It is the sum of the PLASMA VOLUME and ERYTHROCYTE VOLUME.

Treatment process involving the injection of fluid into an organ or tissue.

Single pavement layer of cells which line the luminal surface of the entire vascular system and regulate the transport of macromolecules and blood components.

The species Oryctolagus cuniculus, in the family Leporidae, order LAGOMORPHA. Rabbits are born in burrows, furless, and with eyes and ears closed. In contrast with HARES, rabbits have 22 chromosome pairs.

The movement of materials (including biochemical substances and drugs) through a biological system at the cellular level. The transport can be across cell membranes and epithelial layers. It also can occur within intracellular compartments and extracellular compartments.

A phenomenon in which the surface of a liquid where it contacts a solid is elevated or depressed, because of the relative attraction of the molecules of the liquid for each other and for those of the solid. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

A strain of albino rat developed at the Wistar Institute that has spread widely at other institutions. This has markedly diluted the original strain.

Elements of limited time intervals, contributing to particular results or situations.

Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.

The vascular resistance to the flow of BLOOD through the CAPILLARIES portions of the peripheral vascular bed.

A dull red, firm, dome-shaped hemangioma, sharply demarcated from surrounding skin, usually located on the head and neck, which grows rapidly and generally undergoes regression and involution without scarring. It is caused by proliferation of immature capillary vessels in active stroma, and is usually present at birth or occurs within the first two or three months of life. (Dorland, 27th ed)

A separation technique which combines LIQUID CHROMATOGRAPHY and CAPILLARY ELECTROPHORESIS.

Specialized non-fenestrated tightly-joined ENDOTHELIAL CELLS with TIGHT JUNCTIONS that form a transport barrier for certain substances between the cerebral capillaries and the BRAIN tissue.

Cell-cell junctions that seal adjacent epithelial cells together, preventing the passage of most dissolved molecules from one side of the epithelial sheet to the other. (Alberts et al., Molecular Biology of the Cell, 2nd ed, p22)

Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.

A family of angiogenic proteins that are closely-related to VASCULAR ENDOTHELIAL GROWTH FACTOR A. They play an important role in the growth and differentiation of vascular as well as lymphatic endothelial cells.

Soluble protein factors generated by activated lymphocytes that affect other cells, primarily those involved in cellular immunity.

A group of glucose polymers made by certain bacteria. Dextrans are used therapeutically as plasma volume expanders and anticoagulants. They are also commonly used in biological experimentation and in industry for a wide variety of purposes.

Connective tissue cells of an organ found in the loose connective tissue. These are most often associated with the uterine mucosa and the ovary as well as the hematopoietic system and elsewhere.

A technique of culturing mixed cell types in vitro to allow their synergistic or antagonistic interactions, such as on CELL DIFFERENTIATION or APOPTOSIS. Coculture can be of different types of cells, tissues, or organs from normal or disease states.

A meshlike structure composed of interconnecting nerve cells that are separated at the synaptic junction or joined to one another by cytoplasmic processes. In invertebrates, for example, the nerve net allows nerve impulses to spread over a wide area of the net because synapses can pass information in any direction.

The development of new BLOOD VESSELS during the restoration of BLOOD CIRCULATION during the healing process.

A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.

Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.

A complex of gadolinium with a chelating agent, diethylenetriamine penta-acetic acid (DTPA see PENTETIC ACID), that is given to enhance the image in cranial and spinal MRIs. (From Martindale, The Extra Pharmacopoeia, 30th ed, p706)

Substances used to allow enhanced visualization of tissues.

Soft tissue formed mainly by the pelvic diaphragm, which is composed of the two levator ani and two coccygeus muscles. The pelvic diaphragm lies just below the pelvic aperture (outlet) and separates the pelvic cavity from the PERINEUM. It extends between the PUBIC BONE anteriorly and the COCCYX posteriorly.

A highly toxic gas that has been used as a chemical warfare agent. It is an insidious poison as it is not irritating immediately, even when fatal concentrations are inhaled. (From The Merck Index, 11th ed, p7304)

A major alkaloid from Colchicum autumnale L. and found also in other Colchicum species. Its primary therapeutic use is in the treatment of gout, but it has been used also in the therapy of familial Mediterranean fever (PERIODIC DISEASE).

The amount of a gas taken up, by the pulmonary capillary blood from the alveolar gas, per minute per unit of average pressure of the gradient of the gas across the BLOOD-AIR BARRIER.

The barrier between capillary blood and alveolar air comprising the alveolar EPITHELIUM and capillary ENDOTHELIUM with their adherent BASEMENT MEMBRANE and EPITHELIAL CELL cytoplasm. PULMONARY GAS EXCHANGE occurs across this membrane.

Small polyhedral outpouchings along the walls of the alveolar sacs, alveolar ducts and terminal bronchioles through the walls of which gas exchange between alveolar air and pulmonary capillary blood takes place.

A group of methane-based halogenated hydrocarbons containing one or more fluorine and chlorine atoms.

Potent mast cell degranulation and vascular permeability triggered by urocortin through activation of corticotropin-releasing hormone receptors. (1/3442)

Urocortin (Ucn) is related to corticotropin-releasing hormone (CRH), and both are released in the brain under stress where they stimulate CRH 1 and 2 receptors (CRHR). Outside the brain, they may have proinflammatory actions through activation of mast cells, which are located perivascularly close to nerve endings and degranulate in response to acute psychological stress. Here, we report that a concentration of intradermal Ucn as low as 10 nM induced dose-dependent rat skin mast cell degranulation and increased vascular permeability. This effect appeared to be equipotent to that of calcitonin gene-related peptide and neurotensin. Ucn-induced skin vasodilation was inhibited by pretreatment with the mast cell stabilizer disodium cromoglycate (cromolyn) and was absent in the mast cell-deficient W/Wv mice. The selective nonpeptide CRH receptor 1 antagonist, antalarmin and the nonselective peptide antagonist astressin both reduced vascular permeability triggered by Ucn but not that by Substance P or histamine. In contrast, the peptide antagonist alpha-helical CRH-(9-41) reduced the effect of all three. The vasodilatory effect of Ucn was largely inhibited by pretreatment with H1 receptor antagonists, suggesting that histamine is the major mediator involved in vitro. Neuropeptide depletion of sensory neurons, treatment with the ganglionic blocker hexamethonium, or in situ skin infiltration with the local anesthetic lidocaine did not affect Ucn-induced vascular permeability, indicating that its in situ effect was not mediated through the peripheral nervous system. These results indicate that Ucn is one of the most potent triggers of rat mast cell degranulation and skin vascular permeability. This effect of Ucn may explain stress-induced disorders, such as atopic dermatitis or psoriasis, and may lead to new forms of treatment. (+info)

Reduction of sodium deoxycholic acid-induced scratching behaviour by bradykinin B2 receptor antagonists. (2/3442)

1. Subcutaneous injection of sodium deoxycholic acid into the anterior of the back of male ddY mice elicited dose-dependent scratching of the injected site with the forepaws and hindpaws. 2. Up to 100 microg of sodium deoxycholic acid induced no significant increase in vascular permeability at the injection site as assessed by a dye leakage method. 3. Bradykinin (BK) B2 receptor antagonists, FR173657 and Hoe140, significantly decreased the frequency of scratching induced by sodium deoxycholic acid. 4. Treatment with aprotinin to inhibit tissue kallikrein reduced the scratching behaviour induced by sodium deoxycholic acid, whereas treatment with soybean trypsin inhibitor to inhibit plasma kallikrein did not. 5. Although injection of kininase II inhibitor, lisinopril together with sodium deoxycholic acid did not alter the scratching behaviour, phosphoramidon, a neutral endopeptidase inhibitor, significantly increased the frequency of scratching. 6. Homogenates of the skin excised from the backs of mice were subjected to gel-filtration column chromatography followed by an assay of kinin release by trypsin from each fraction separated. Less kinin release from the fractions containing kininogen of low molecular weight was observed in the skin injected with sodium deoxycholic acid than in normal skin. 7. The frequency of scratching after the injection of sodium deoxycholic acid in plasma kininogen-deficient Brown Norway Katholiek rats was significantly lower than that in normal rats of the same strain, Brown Norway Kitasato rats. 8. These results indicate that BK released from low-molecular-weight kininogen by tissue kallikrein, but not from high-molecular-weight kininogen by plasma kallikrein, may be involved in the scratching behaviour induced by the injection of sodium deoxycholic acid in the rodent. (+info)

Role for nitric oxide in the hyperpermeability and hemodynamic changes induced by intravenous VEGF. (3/3442)

PURPOSE: To explore the effects of brief intravenous (IV) infusion of vascular endothelial growth factor (VEGF) on vascular albumin permeability, blood flow, and vascular conductance (blood flow normalized to arterial blood pressure) in ocular tissues and brain and to assess the role of nitric oxide in mediating these changes. METHODS: A quantitative, double-tracer, radiolabeled albumin permeation method was combined with radiolabeled microspheres for assessment of changes in vascular permeability and blood flow, respectively, induced in ocular tissues by IV infusion of recombinant human VEGF165 for 20 minutes (80-450 picomoles/kg body weight). An inhibitor of nitric oxide synthase (NOS), NG-monomethyl-L-arginine (L-NMMA; 50 micromoles/kg body weight infused simultaneously with VEGF), was used to explore the role of nitric oxide in mediating the vascular changes induced by VEGF. RESULTS: Infusion of VEGF165 in thiopental-anesthetized rats dose-dependently increased 125I albumin permeation in the retina, anterior uvea, and choroid/sclera and in brain, aorta, lung, kidney, small intestine, and peripheral nerve. Mean arterial blood pressure, cardiac output, and stroke volume were decreased only at the highest dose of VEGF, whereas heart rate remained unchanged. Blood flow was increased in the anterior uvea, and vascular conductance was increased in retina, anterior uvea, choroid/sclera, and brain at the highest dose of VEGF. The NOS inhibitor, L-NMMA, blocked VEGF-induced vascular hyperpermeability in all ocular and nonocular tissues, prevented the increase in vascular conductance in all ocular tissues, and blocked the decrease in mean arterial blood pressure, cardiac output, and stroke volume. Infusion of L-NMMA alone decreased vascular conductance in choroid/sclera and kidney, slightly increased mean arterial blood pressure, and in general, did not affect 125I-albumin permeation. (L-NMMA slightly decreased albumin permeation in the retina and increased it in the brain.) CONCLUSIONS: Intravenous infusion of VEGF can acutely impair endothelial cell barrier functional integrity and relax resistance arterioles in ocular tissues and brain through a mechanism involving activation of NOS. (+info)

Strain-dependent induction of allergic sensitization caused by peanut allergen DNA immunization in mice. (4/3442)

To investigate the potential application of allergen gene immunization in the modulation of food allergy, C3H/HeSn (C3H) mice received i.m. injections of pAra h2 plasmid DNA encoding one of the major peanut allergens, Ara h2. Three weeks following pDNA immunization, serum Ara h2-specific IgG2a, IgG1, but not IgE, were increased significantly in a dose-dependent manner. IgG1 was 30-fold higher in multiply compared with singly immunized mice. Ara h2 or peanut protein injection of immunized mice induced anaphylactic reactions, which were more severe in multiply immunized mice. Heat-inactivated immune serum induced passive cutaneous anaphylaxis, suggesting that anaphylaxis in C3H mice was mediated by IgG1. IgG1 responses were also induced by intradermal injection of pAra h2, and by i.m. injection of pOMC, the plasmid DNA encoding the major egg allergen protein, ovomucoid. To elucidate whether the pDNA immunization-induced anaphylaxis was a strain-dependent phenomenon, AKR/J and BALB/c mice also received multiple i.m. pAra h2 immunizations. Injection of peanut protein into these strains at weeks 3 or 5 following immunization did not induce reactions. Although IgG2a was increased significantly from week 2 in AKR/J mice and from week 4 in BALB/c mice and remained elevated for at least 6 wk, no IgG1 or IgE was detected. These results indicate that the type of immune responses to pDNA immunization in mice is strain dependent. Consequently, models for studying human allergen gene immunization require careful selection of suitable strains. In addition, this suggests that similar interindividual variation is likely in humans. (+info)

Antipsoriatic, anti-inflammatory, and analgesic effects of an extract of red propolis. (5/3442)

AIM: To study the antipsoriatic, anti-inflammatory, and analgesic effects of ethanolic extract of red propolis. METHODS AND RESULTS: This extract induced the formation of granular layer in the mouse tail test used as a model of psoriasis. Propolis 50 mg.kg-1 i.g. showed anti-inflammatory activity in the cotton-pellet granuloma assay in rats, in croton oil-induced edema in mice at a dose of 25% (2.5 microL), and in the peritoneal capillary permeability test in mice at a dose of 10 mg.kg-1. The extract (25 mg.kg-1 i.g.) showed analgesic effect in the model of acetic acid-induced writhings, whereas 40 mg.kg-1 was effective in the hot plate test in mice. CONCLUSION: Anti-inflammatory, analgesic, and antipsoriatric properties of Cuban red propolis were evident. (+info)

Endogenous nitric oxide in the maintenance of rat microvascular integrity against widespread plasma leakage following abdominal laparotomy. (6/3442)

1. The role of nitric oxide (NO) in the maintenance of microvascular integrity during minor surgical manipulation has been evaluated in the rat. 2. The NO synthase inhibitors, NG-nitro-L-arginine methyl ester (L-NAME, 5 mg kg(-1), s.c.) and N(G)-monomethyl-L-arginine (L-NMMA, 50 mg kg(-1), s.c.) had no effect on microvascular leakage of radiolabelled albumin over 1 h in the stomach, duodenum, jejunum, colon, lung and kidney in the un-operated conscious or pentobarbitone-anaesthetized rat. 3. In contrast, in anaesthetized rats with a midline abdominal laparotomy (5 cm), L-NAME (1-5 mg kg(-1), s.c.) or L-NMMA (12.5-50 mg kg(-1), s.c.) dose-dependently increased gastrointestinal, renal and pulmonary vascular leakage, effects reversed by L-arginine pretreatment (300 mg kg(-1), s.c., 15 min). These actions were not observed in anaesthetized rats that had only received a midline abdominal skin incision (5 cm). 4. Pretreatment with a rabbit anti-rat neutrophil serum (0.4 ml kg(-1), i.p.), 4 h before laparotomy, abolished the plasma leakage induced by L-NAME in all the organs investigated. 5. These results indicate that the following abdominal laparotomy, inhibition of constitutive NO synthase provokes vascular leakage in the general microcirculation, by a process that may involve neutrophils. Such effects could thus confound studies on the microvascular actions of NO synthase inhibitors using acute surgically prepared in vivo models. The findings thus suggest that constitutively-formed NO has a crucial role in the maintenance of acute microvascular integrity following abdominal surgical intervention. (+info)

Neurogenic plasma leakage in mouse airways. (7/3442)

1. This study sought to determine whether neurogenic inflammation occurs in the airways by examining the effects of capsaicin or substance P on microvascular plasma leakage in the trachea and lungs of male pathogen-free C57BL/6 mice. 2. Single bolus intravenous injections of capsaicin (0.5 and 1 micromol kg(-1), i.v.) or substance P (1, 10 and 37 nmol kg(-10, i.v.) failed to induce significant leakage in the trachea, assessed as extravasation of Evans blue dye, but did induce leakage in the urinary bladder and skin. 3. Pretreatment with captopril (2.5 mg kg(-1), i.v.), a selective inhibitor of angiotensin converting enzyme (ACE), either alone or in combination with phosphoramidon (2.5 mg kg(-1), i.v.), a selective inhibitor of neutral endopeptidase (NEP), increased baseline leakage of Evans blue in the absence of any exogenous inflammatory mediator. The increase was reversed by the bradykinin B2 receptor antagonist Hoe 140 (0.1 mg kg(-1), i.v.). 4. After pretreatment with phosphoramidon and captopril, capsaicin increased the Evans blue leakage above the baseline in the trachea, but not in the lung. This increase was reversed by the tachykinin (NK1) receptor antagonist SR 140333 (0.7 mg kg(-1), i.v.), but not by the NK2 receptor antagonist SR 48968 (1 mg kg(-1), i.v.). 5. Experiments using Monastral blue pigment as a tracer localized the leakage to postcapillary venules in the trachea and intrapulmonary bronchi, although the labelled vessels were less numerous in mice than in comparably treated rats. Blood vessels of the pulmonary circulation were not labelled. 6. We conclude that neurogenic inflammation can occur in airways of pathogen-free mice, but only after the inhibition of enzymes that normally degrade inflammatory peptides. Neurogenic inflammation does not involve the pulmonary microvasculature. (+info)

Enhancement of fluid filtration across tumor vessels: implication for delivery of macromolecules. (8/3442)

Cancer therapies using genes and other macromolecules might realize their full clinical potential if they could be delivered to tumor tissue in optimal quantities. Unfortunately, the compromised circulation within tumors poses a formidable resistance to adequate and uniform penetration of these agents. Previously, we have proposed elevated interstitial fluid pressure (IFP) as a major physiological barrier to delivery of macromolecules. Here we postulate that modulation of tumor microvascular pressure (MVP) and associated changes in IFP would enhance macromolecular delivery into a solid tumor. To test our hypothesis, we altered tumor MVP by either periodic injection or continuous infusion of angiotensin II (AII) and measured the resulting changes in IFP and uptake of macromolecules. We used the nicotinyl hydrazine derivative of human polyclonal IgG (HYNIC-IgG) as a nonspecific macromolecule and CC49 antibody as a specific macromolecule. We found that both chronic and periodic modulation of tumor MVP enhances transvascular fluid filtration, leading to a 40% increase in total uptake of the specific antibody within 4 hr of its administration. Conversely, neither continuous nor periodic infusion of AII induced any increase in uptake of nonspecific antibodies. Strategies to improve delivery of macromolecules and limitations of this approach are identified. (+info)

Schnitzer, J. E.; Oh, P. (1994). "Albondin-mediated capillary permeability to albumin. Differential role of receptors in ...

https://en.wikipedia.org/wiki/Albondin

Localized pleural fluid effusion noted during pulmonary embolism (PE) results probably from increased capillary permeability ...

https://en.m.wikipedia.org/wiki/Pleural_cavity

A hydrodynamic capillary effect can be used to manipulate cell permeability. In plants the DNA is often inserted using ...

https://en.wikipedia.org/wiki/Gene_delivery

Farquhar, M G; Wissig S L; Palade G E (December 1999). "Glomerular permeability I. Ferritin transfer across the normal ... glomerular capillary wall. 1961". Journal of the American Society of Nephrology. 10 (12): 2645-62. ISSN 1046-6673. PMID ...

https://en.wikipedia.org/wiki/George_Emil_Palade

The most interesting are: Capillary bed permeability, which varies between tissues. Blood-brain barrier: this is located ... The distribution of a drug between tissues is dependent on vascular permeability, regional blood flow, cardiac output and ...

https://en.wikipedia.org/wiki/Distribution_(pharmacology)

Histamine causes dilation and increased permeability of capillaries close to the basophil. Injured basophils and other ... Increased permeability of the inflamed tissue also allows for more phagocyte migration to the site of infection so that they ...

https://en.wikipedia.org/wiki/Granulocytopenia

The injection of IP activators into the skin of rodents increases local capillary permeability and swelling; IP(-/-) mice fail ... IP antagonists likewise reduce experimentally-induced capillary permeability and swelling in rats. This actions is also ... to show this increased capillary permeability and swelling in response not only to IP activators but also in a model of ...

https://en.wikipedia.org/wiki/Prostacyclin_receptor

Also, the damage on the blood vessels resulted in increased capillary permeability. This increased permeability lead to a ...

https://en.wikipedia.org/wiki/PR_toxin

In the acute phase of ALI, there is increased permeability of this barrier and protein rich fluid leaks out of the capillaries ... The direct toxicity to the cells leads to an increase in capillary permeability. Furthermore, when phosgene hydrolyzes it forms ... The core pathology is disruption of the capillary-endothelial interface: this actually refers to two separate barriers - the ...

https://en.wikipedia.org/wiki/Acute_inhalation_injury

It is a densely vascularized structure with subregional capillary specializations for high permeability for circulating blood ... A tanycyte barrier partially compensates for high capillary permeability in the area postrema. Physiological subregional ... whereas medial and dorsal area postrema capillaries had microscopic characteristics of high permeability, a characteristic ... Capillary blood flow appears to be uniquely slow in the area postrema, prolonging the contact time for blood-borne hormones to ...

https://en.wikipedia.org/wiki/Area_postrema

High protein (> 2.5 mg/dL) suggests increased capillary permeability associated with peritonitis, intestinal compromise, or ... Capillary refill time (CRT) may be decreased early in the colic, but generally prolongs as the disease progresses and ... The poor blood supply also has effects on the vascular endothelium, leading to an increased permeability which first leaks ... Inflammation of the bowel may lead to increased permeability and subsequent endotoxemia. The underlying cause of inflammation ...

https://en.wikipedia.org/wiki/Horse_colic

PDGF and VEGF have growth promoting properties and cause connective tissue hypertrophy and capillary permeability. When ... They are then trapped within the capillary beds within the extremities, such as the digits, and release platelet-derived growth ... megakaryocytes that arise from the bone marrow are trapped in the pulmonary capillary bed and broken down before they enter the ...

https://en.wikipedia.org/wiki/Nail_clubbing

In addition, brodifacoum (as with other anticoagulants in toxic doses) increases permeability of blood capillaries; the blood ...

https://en.wikipedia.org/wiki/Brodifacoum

It is a synthetic molecule with the ability to reduce capillary permeability in the body. In Switzerland the drug is sold by ... In fact, it reduces capillary permeability both by stabilizing the basement membrane for an action on the collagen chains that ... Calcium dobesilate is indicated in states of fragility and altered capillary permeability, e.g. diabetic retinopathy, chronic ... constitute it, and by interacting with different biochemical mediators that favor endothelial permeability itself. In this way ...

https://en.wikipedia.org/wiki/Calcium_dobesilate

Reverses capillary permeability and lysosomal stabilization at the cellular level to prevent or control inflammation. Has a ...

https://en.wikipedia.org/wiki/Budesonide

Capillary Permeability: The Transfer of Molecules and Ions Between Capillary Blood and Tissue (C. ed.). Munksgaard: Copenhagen ... Betz, A.L.; Goldstein, G.W. "Brain capillaries: structure and function". In Lajtha, A. (ed.). Structural Elements of the ... Smith, Q.R. (1989). "Quantitation of blood-brain barrier permeability". In Neuwelt, E.A. (ed.). Implications of the Blood-Brain ...

https://en.wikipedia.org/wiki/Retrometabolic_drug_design

Concerning two-phase flows an important problem is to estimate the relative permeabilities and the capillary pressures. The ... Chavent, Guy; Cohen, Gary; Espy, M. (1980). "Determination of relative permeabilities and capillary pressures by an automatic ... see for an application to the determination of permeabilities that match the existing permeability data), neural networks, ... Tahmasebi, Pejman; Javadpour, Farzam; Sahimi, Muhammad (August 2016). "Stochastic shale permeability matching: Three- ...

https://en.wikipedia.org/wiki/Inverse_problem

Capillary pressure Permeability (fluid) Relative permeability Darcy's law S.E. Buckley and M.C. Leverett (1942). "Mechanism of ... k r w ( S w ) {\displaystyle k_{rw}(S_{w})} and k r n ( S w ) {\displaystyle k_{rn}(S_{w})} denote the relative permeability ... Flow is linear and horizontal Both wetting and non-wetting phases are incompressible Immiscible phases Negligible capillary ...

https://en.wikipedia.org/wiki/Buckley–Leverett_equation

"Heterogeneity of cerebral capillary flow in man and its consequences for estimation of blood-brain barrier permeability". J ...

https://en.wikipedia.org/wiki/Nitrazepam

Farquhar, M G; Wissig S L, Palade G E (December 1999). "Glomerular permeability I. Ferritin transfer across the normal ... glomerular capillary wall. 1961". J. Am. Soc. Nephrol. (United States) 10 (12): 2645-62. ISSN 1046-6673. PMID 10589706. ...

https://tr.wikipedia.org/wiki/George_Emil_Palade

These changes are due to increased capillary permeability and an influx of inflammatory cells into the gingival tissues. When ...

https://en.wikipedia.org/wiki/Periodontics

It also inhibits the effects of the prostaglandin mediated vasodilatation and increased capillary permeability, thereby ... Etamsylate was also thought to stabilise capillaries, reinforcing capillary membranes by polymerising hyaluronic acid. ... vasodilation and increased capillary permeability. Prophylaxis and control of haemorrhages from small blood vessels, neonatal ... Etamsylate limits capillary bleeding through its action on hyaluronic acid and initial studies showed a reduction in ...

https://en.wikipedia.org/wiki/Etamsylate

The higher the specific gravity, the greater the likelihood of capillary permeability changes in relation to body cavities. For ...

https://en.wikipedia.org/wiki/Exudate

The events preceding OM are acute inflammatory changes such as hyperemia, increased capillary permeability and infiltration of ...

https://en.wikipedia.org/wiki/Osteomyelitis_of_the_jaws

IgE with Aspergillus antigens results in mast cell degranulation with bronchoconstriction and increased capillary permeability ...

https://en.wikipedia.org/wiki/Allergic_bronchopulmonary_aspergillosis

Farquhar, M G; Wissig S L; Palade G E (December 1999). "Glomerular permeability I. Ferritin transfer across the normal ... glomerular capillary wall. 1961". 》J. Am. Soc. Nephrol.》 (United States) 10 (12): 2645-62. ISSN 1046-6673. PMID 10589706.. ...

https://ko.wikipedia.org/wiki/조지_에밀_펄레이드

Fluid from the bloodstream leaks through the wall of small blood vessels into body cavities due to capillary permeability. As a ... Severe disease is marked by the problems of capillary permeability (an allowance of fluid and protein normally contained within ... Leaky capillaries (and the critical phase) are thought to be caused by an immune system response. Other processes of interest ... Some petechiae (small red spots that do not disappear when the skin is pressed, which are caused by broken capillaries) can ...

https://en.wikipedia.org/wiki/Dengue_fever

... involves fluid accumulation in the outer plexiform layer secondary to abnormal perifoveal retinal capillary permeability. The ... causing the capillaries in the retina to dilate and leak fluid into the retina. Less common today with modern lens replacement ... is similarly caused by leaking macular capillaries. DME is the most common cause of visual loss in both proliferative, and non- ...

https://en.wikipedia.org/wiki/Macular_edema

... water vapor permeability and capillary. They are lightweight , soft, flexible and silky texture. They are disposable and ...

https://en.wikipedia.org/wiki/Hydroentanglement

... e increases the blood vessel's permeability and dilates capillaries, enabling a faster distribution of the venom. ... The dilation of capillaries is the cause of the hypotension. At first, it was thought that the impairment of the respiratory ... The formation of pores in capillaries, for example, is the cause of hypotension caused by stonefish envenomation. The venom of ...

https://en.wikipedia.org/wiki/Stonustoxin

Osmotic diuretics (e.g. mannitol) are substances that increase osmolarity but have limited tubular epithelial cell permeability ... particularly the peritubular capillaries. This reduces medullary osmolality and thus impairs the concentration of urine in the ... the limited tubular epithelial cell permeability increases osmolality and thus water retention in the filtrate.[10] ...

https://en.m.wikipedia.org/wiki/Diuretic

... with continuous being the least porous of the three and discontinuous capillaries being extremely high in permeability. ... Continuous blood capillaries have the smallest intercellular clefts, with discontinuous blood capillaries having the largest ... However, most of this fluid returns into the capillary at the venous end, creating capillary fluid dynamics. Two opposing ... Most notably, intercellular clefts are described in capillary blood vessels. The three types of capillary blood vessels are ...

https://en.wikipedia.org/wiki/Intercellular_cleft

... which are able to move outside of the vascular system by migrating through the walls of capillary vessels and entering the ... of the coagulation system can contribute to the non-specific defenses by their ability to increase vascular permeability and ...

https://en.wikipedia.org/wiki/Innate_immune_system

For allergic conjunctivitis, cool water poured over the face with the head inclined downward constricts capillaries, and ...

https://en.wikipedia.org/wiki/Pink_Eye

... acts upon blood vessels and capillaries of the salivary gland to generate vasodilation and increased capillary permeability ...

https://en.wikipedia.org/wiki/Saliva

The lipid composition is important as it defines many physical properties such as membrane permeability and fluidity. ... is transported back to the pulmonary capillaries of the lungs as bicarbonate (HCO3−) dissolved in the blood plasma. Myoglobin, ... larger than capillary diameter, and it has been hypothesized that this improves the oxygen transfer from red blood cells to ... and shows the red blood cell deforming as it enters capillaries, as well as the bars changing color as the cell alternates in ...

https://en.m.wikipedia.org/wiki/Red_blood_cells

When the pulmonary capillary pressure remains elevated chronically (for at least 2 weeks), the lungs become even more resistant ... Therefore, in patients with chronic mitral stenosis, pulmonary capillary pressures of 40 to 45 mm Hg have been measured without ... Varying Permeability Model. *Equivalent air depth. *Equivalent narcotic depth. *Maximum operating depth ...

https://en.wikipedia.org/wiki/Hypoxia_

Increased permeability of the lung vessels causes leaking of fluids into alveoli, which results in pulmonary edema and acute ... Glucose levels taken from capillary blood should be interpreted with care because such measurements may not be accurate. If a ... In the gastrointestinal tract, increased permeability of the mucosa alters the microflora, causing mucosal bleeding and ...

https://en.wikipedia.org/wiki/Sepsis

Permeability of the endothelium is pivotal in the release of nutrients to the tissue. It is also increased in inflammation in ... It also contains nerves that supply the vessel as well as nutrient capillaries (vasa vasorum) in the larger blood vessels. ... Blood vessel permeability is increased in inflammation. Damage, due to trauma or spontaneously, may lead to hemorrhage due to ... Left heart → Aorta → Arteries → Arterioles → Capillaries → Venules → Veins → Vena cava → (Right heart) ...

https://en.wikipedia.org/wiki/Vascular

Vascular endothelial cells line the entire circulatory system, from the heart to the smallest capillaries. These cells have ... Excessive or prolonged increases in permeability of the endothelial monolayer, as in cases of chronic inflammation, may lead to ... Left heart → Aorta → Arteries → Arterioles → Capillaries → Venules → Veins → Vena cava → (Right heart) ... Both blood and lymphatic capillaries are composed of a single layer of endothelial cells called a monolayer. In straight ...

https://en.wikipedia.org/wiki/Endothelium

Light dye damaged the glycocalyx minimally, but that small change increased capillary hematocrit. Thus, fluorescence light ... In microvascular tissue, the glycocalyx serves as a vascular permeability barrier by inhibiting coagulation and leukocyte ... capillaries) and macrovessels (arteries and veins). The glycocalyx also consists of a wide range of enzymes and proteins that ... increase in vascular permeability. Vascular walls being permeable is disadvantageous, since that would enable passage of some ...

https://en.wikipedia.org/wiki/Glycocalyx

Most water leakage occurs in capillaries or post capillary venules, which have a semi-permeable membrane wall that allows water ... Thus the resulting increase in permeability that leads to protein in the urine can explain the edema if all other vessels are ... Most forms of nephrotic syndrome are due to biochemical and structural changes in the basement membrane of capillaries in the ... If the gaps between the cells of the vessel wall open up then permeability to water is increased first, but as the gaps ...

https://en.m.wikipedia.org/wiki/Edema

The capillary or loop is mounted on a goniometer, which allows it to be positioned accurately within the X-ray beam and rotated ... Different oils have different evaporation permeabilities, therefore yielding changes in concentration rates from different ... In the past, crystals were loaded into glass capillaries with the crystallization solution (the mother liquor). Nowadays, ... the φ angle about the loop/capillary axis. When the κ angle is zero, the ω and φ axes are aligned. The κ rotation allows for ...

https://en.wikipedia.org/wiki/X-ray_crystallography

Controlling Capillary Flow, an application of Darcy's law, at iMechanica *^ "CalcTool: Porosity and permeability calculator". ... Absolute permeability (aka intrinsic or specific permeability)Edit. Absolute permeability denotes the permeability in a porous ... Tensor permeabilityEdit. To model permeability in anisotropic media, a permeability tensor is needed. Pressure can be applied ... PermeabilityEdit. Permeability is the property of rocks that is an indication of the ability for fluids (gas or liquid) to flow ...

https://en.m.wikipedia.org/wiki/Permeability_

This makes the capillaries in the nail bed below visible, resulting in a pink color.[7][unreliable source?] ... Permeability[edit]. The nail is often considered an impermeable barrier, but this is not true. In fact, it is much more ... a b K. A. Walters and G. L. Flynn, Permeability characteristics of the human nail plate, International Journal of Cosmetic ... Schriger DL, Baraff LJ (Jun 1991). "Capillary refill - is it a useful predictor of hypovolemic states?". Ann Emerg Med. 20 (6 ...

https://en.wikipedia.org/wiki/Nail_

If recanalization proceeds it provides capillary-sized channels through the thrombus for continuity of blood flow through the ... potentially affecting permeability of the blood-brain barrier,[10] and may even cause cerebral hemorrhaging.[11] ...

https://en.m.wikipedia.org/wiki/Blood_clot

The process is also known as hydrostatic filtration due to the hydrostatic pressure exerted on the capillary walls. ... water and ion permeability in the descending limb of the loop, water impermeability in the ascending loop, and active ion ... Reabsorption is the transport of molecules from this ultrafiltrate and into the peritubular capillary. It is accomplished via ... Secretion is the reverse of reabsorption: molecules are transported from the peritubular capillary through the interstitial ...

https://en.wikipedia.org/wiki/Renal

Also serves as part of the filtration system in capillaries and the glomeruli of nephron in the kidney.. COL4A1, COL4A2, COL4A3 ... Collagen has the correct properties for tissue regeneration such as pore structure, permeability, hydrophilicity, and being ... A collagen wound dressing might serve as a guide for orienting new collagen deposition and capillary growth. ...

https://en.m.wikipedia.org/wiki/Collagen

https://en.m.wikipedia.org/wiki/Blood_clots

Permeability[edit]. Human skin has a low permeability; that is, most foreign substances are unable to penetrate and diffuse ... Blood capillaries are found beneath the epidermis and are linked to an arteriole and a venule. Arterial shunt vessels may ... and oleic acid to the surface of the skin to increase permeability;[43][44] electroporation increases skin permeability by the ... because of the limitations in permeability of the skin. Development of techniques that increase skin permeability has led to ...

https://en.wikipedia.org/wiki/Human_skin

Permeability of the endothelium is pivotal in the release of nutrients to the tissue. It is also increased in inflammation in ... The capillaries are responsible for allowing the blood to receive oxygen through tiny air sacs in the lungs. This is also the ... Blood vessel permeability is increased in inflammation. Damage, due to trauma or spontaneously, may lead to hemorrhage due to ... It also contains nerves that supply the vessel as well as nutrient capillaries (vasa vasorum) in the larger blood vessels. ...

https://en.m.wikipedia.org/wiki/Blood_vessels

... 1 (permeability glycoprotein, abbreviated as P-gp or Pgp) also known as multidrug resistance protein 1 (MDR1) or ... and in the capillary endothelial cells composing the blood-brain barrier and blood-testis barrier, where it pumps them back ... Juliano RL, Ling V (November 1976). "A surface glycoprotein modulating drug permeability in Chinese hamster ovary cell mutants ... into the capillaries. P-gp is a glycoprotein that in humans is encoded by the ABCB1 gene.[4] P-gp is a well-characterized ABC- ...

https://en.m.wikipedia.org/wiki/P-glycoprotein

IP antagonists likewise reduce experimentally-induced capillary permeability and swelling in rats. This actions is also ... mice fail to show this increased capillary permeability and swelling in response not only to IP activators but also in a model ... The injection of IP activators into the skin of rodents increases local capillary permeability and swelling; IP(-/-) ...

https://en.m.wikipedia.org/wiki/IP_receptor

Histamine increases the permeability of the capillaries to white blood cells and some proteins. The cells get through the walls ...

https://simple.m.wikipedia.org/wiki/Histamine

https://hy.wikipedia.org/wiki/Մասնակից:ArmArtificial_Intelligence/Ավազարկղ

Definition of capillary permeability factor. Provided by Stedmans medical dictionary and Drugs.com. Includes medical terms and ...

https://www.drugs.com/dict/capillary-permeability-factor.html

What determines glomerular capillary permeability?. William M. Deen Department of Chemical Engineering and Division of ... Effects of other structures on glomerular permeability. How does the rest of the glomerular capillary wall influence its ... Thus, in considering the determinants of glomerular capillary permeability, one should avoid the temptation to focus ... In other words, for the intact capillary wall in vivo, it is calculated that Θbm ≅ 1 (8). Consistent with this prediction is ...

https://www.jci.org/articles/view/23577

Capillary permeability factor definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and ... capillary permeability factor in Medicine Expand. capillary permeability factor n. See vitamin P. ...

http://www.dictionary.com/browse/capillary-permeability-factor

... but it is an ongoing challenge to accurately describe the relationship between capillary... ... A sizable oil reserves are held in a thick oil/water capillary transition zones in the carbonate reservoirs, ... capillary pressure and relative permeability and saturation to obtain typical capillary pressure and relative permeability ... 3, 4, 5, 6, 7 and 8, there is a change in shapes of capillary pressure curves. This is due to change in capillary pressure with ...

https://link.springer.com/article/10.1007%2Fs13202-017-0384-5

... Olugbenga ... Olugbenga Falode and Edo Manuel, "Wettability Effects on Capillary Pressure, Relative Permeability, and Irredcucible Saturation ...

https://www.hindawi.com/journals/jpe/2014/465418/cta/

... much tighter control of permeability was achieved. Relative to the EC-fibroblast co-cultures, permeabilities were reduced 41% ... Quantitatively, permeability dropped from initial levels of 61% to 39% after 7 days, and to 7% after 2 weeks. When ECs were co- ... The purpose of this study was to test the resistance to permeability of these networks in vitro, grown with different stromal ... Our lab has developed a 3D co-culture method to grow interconnected networks of pericyte-invested capillaries, which can ...

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0022086

... linear kinetic model has been developed for the noninvasive assessment of capillary permeability to macromolecules in the rat ... Measurement of capillary permeability to macromolecules by dynamic magnetic resonance imaging: a quantitative noninvasive ... A simple, linear kinetic model has been developed for the noninvasive assessment of capillary permeability to macromolecules in ... The technique may be generally applicable to the study of abnormal capillary permeability in humans as well as animals. ...

https://pubmed.ncbi.nlm.nih.gov/8505897/?dopt=Abstract

Use of Capillary Pressure to Estimate Permeability in a Drill Cutting Sample Lansing "C" Zone, Ashley #1, NE/4 Section 5 T17S ... Analysis included routine porosity, mercury capillary pressure analysis and permeability calculation from principal pore throat ... were submitted for analysis to determine permeability from principal pore throat diameter as measured by mercury capillary ...

http://www.kgs.ku.edu/PRS/publication/2002/OFR02_41/index.html

Changes were measured in the permeability of the alveolar capillary membrane and lavage surfactant concentrations following ... Colchicine inhibits elevations in both alveolar-capillary membrane permeability and lavage surfactant after exposure of the rat ... Changes were measured in the permeability of the alveolar capillary membrane and lavage surfactant concentrations following ... Permeability was elevated immediately but returned to normal values one day after inhalation. Values of total phospholipid in ...

https://www.cdc.gov/niosh/nioshtic-2/00203300.html

A wide variation in the air and water permeabilities was obtained for each type of coal. Overburden pressure has the most ... G0122006), gas and water permeabilities of a large number of samples from the Pittsburgh and Pocahontas coals were measured at ... significant effect on the single-phase permeability. Considerable hysteretic ... Development of Techniques and the Measurement of Relative Permeability and Capillary Pressure Relationships in Coal.. ...

https://www.cdc.gov/niosh/nioshtic-2/10000770.html

The study of changes in cardiac permeability with chemotherapy could enhance the understanding of mechanisms behind cardiac ... Crone, C. The permeability of capillaries in various organs as determined by use of the indicator diffusion method. Acta ... Myocardial capillary permeability after regional ischemia and reperfusion in the in vivo canine heart. Effect of superoxide ... Application of a fluorescent multiple indicator dilution method to study changes in cardiac capillary permeability with ...

https://link.springer.com/article/10.1007/s10439-014-1110-9

What is capillary permeability? Meaning of capillary permeability as a finance term. What does capillary permeability mean in ... Definition of capillary permeability in the Financial Dictionary - by Free online English dictionary and encyclopedia. ... Related to capillary permeability: blood capillary, fenestrated capillaries, continuous capillaries. permeability. The measure ... permeability. (redirected from capillary permeability). Also found in: Dictionary, Thesaurus, Medical, Encyclopedia. ...

https://financial-dictionary.thefreedictionary.com/capillary+permeability

We examined ultrastructural findings of capillaries of these tumors and discussed the causes of cerebral edema as compared with ... Ultrastructure of capillary permeability in human brain tumor--Part 6: Metastatic brain tumor with brain edema] No Shinkei Geka ... Among these, an appearance of capillary fenestration was the most conspicuous features and observed in almost all capillaries. ... We examined ultrastructural findings of capillaries of these tumors and discussed the causes of cerebral edema as compared with ...

https://pubmed.ncbi.nlm.nih.gov/3399012/?dopt=Abstract

The glomerular capillary wall is an exquisitely well-engineered barrier, which is normally very permeable to water and yet able ... The first step in urine formation is the ultrafiltration of blood in renal glomerular capillaries. ... Structural Basis for Glomerular Capillary Permeability. Wednesday, February 10, 1999 - 2:00pm - 2:45pm ... The first step in urine formation is the ultrafiltration of blood in renal glomerular capillaries. The glomerular capillary ...

https://www.ima.umn.edu/1998-1999/W2.8-12.99/17045

List of treatments and remedies for Edema due to increased capillary permeability in children and treatments for any causes of ... Edema due to increased capillary permeability in children. ... Deaths and Edema due to increased capillary permeability in ... Symptom Checker for Edema due to increased capillary permeability in Symptoms » Edema due to increased capillary permeability ... Edema due to increased capillary permeability in children *Common causes of Edema due to increased capillary permeability in ...

https://www.rightdiagnosis.com/symptoms/edema_due_to_increased_capillary_permeability_in_children/treatments.htm

RITODRINE DOES NOT INCREASE LUNG CAPILLARY PERMEABILITY IN SHEEP F. G. Zavisca, M. D.; R. E. Drake, Ph.D.; E. Abouleish, M. D. ... RITODRINE DOES NOT INCREASE LUNG CAPILLARY PERMEABILITY IN SHEEP You will receive an email whenever this article is corrected, ... RITODRINE DOES NOT INCREASE LUNG CAPILLARY PERMEABILITY IN SHEEP. Anesthesiology 9 1984, Vol.61, A399. doi: ... RITODRINE DOES NOT INCREASE LUNG CAPILLARY PERMEABILITY IN SHEEP. Anesthesiology 1984;61(3):A399. ...

http://anesthesiology.pubs.asahq.org/article.aspx?articleid=1962949

Pharmacokinetic Analysis of Immunotoxin Uptake in Solid Tumors: Role of Plasma Kinetics, Capillary Permeability, and Binding. ... However, despite the lower capillary permeability of the larger molecular weight toxin, the cumulative tumor exposure to ... This study illustrates the interrelationship of plasma kinetics, capillary permeability, and binding and their effects on toxin ... Pharmacokinetic Analysis of Immunotoxin Uptake in Solid Tumors: Role of Plasma Kinetics, Capillary Permeability, and Binding ...

https://cancerres.aacrjournals.org/content/50/22/7382?ijkey=260f90314087072716da41f7d2f382fd7875b37f&keytype2=tf_ipsecsha

Capillary Pressure, multi-frequency electric measurements, Nuclear Magnetic Resonance, Directional Permeability, Hydrocarbon ... We verified that the estimates of permeability, saturation-dependent capillary pressure, and throat-size distribution obtained ... directional permeability, saturation-dependent capillary pressure), and fluid distribution. However, techniques for reliable ... and tortuosity are used to calculate directional permeability and saturation-dependent capillary pressure. We test the ...

https://onepetro.org/conference-paper/SPE-195468-MS

Permeability of retinal capillaries in rats with inherited retinal degeneration. You will receive an email whenever this ... The permeability of retinal capillaries in RCS rats with inherited retinal degeneration was investigated with horseradish ... The RCS rat may be a useful model for studying the morphological basis of changes in capillary permeability associated with ... E Essner, R M Pino, R A Griewski; Permeability of retinal capillaries in rats with inherited retinal degeneration.. Invest. ...

https://iovs.arvojournals.org/article.aspx?articleid=2158972

Title: On the capillary pressure function in porous media based on relative permeabilities of two immiscible fluids: ... Publishers Accepted Manuscript: On the capillary pressure function in porous media based on relative permeabilities of two ... immiscible fluids: Application of capillary bundle models and validation using experimental data ...

https://www.osti.gov/pages/biblio/1374235-capillary-pressure-function-porous-media-based-relative-permeabilities-two-immiscible-fluids-application-capillary-bundle-models-validation-using-experimental-data

The wetting phase (oil) will tend to accumulate at the outlet where the capillary pressure is zero and leave a highly remaining ... Summary In preferentially oil-wet porous media, laboratory waterflooding experiments are prone to capillary end effects. ... capillary end effects, alternative determination of relative permeability and capillary pressure, capillary pressure from core ... Capillary Pressures-Their Measurement Using Mercury and the Calculation of Permeability Therefrom. J Pet Technol 1 (2): 39-48. ...

https://www.onepetro.org/journal-paper/SPE-197065-PA

... absolute permeability, permeability curve, capillary pressure curve, relative permeability curve ... where relative permeabilities and capillary pressure as well as absolute permeability, and porosity are adapted using a ... Determination of Relative Permeability and Capillary Pressure Curves Using an Automated History-Matching Approach Basar Basbug ... Capillary pressures as well as relative permeabilities were determined by Chavent et al. (1980) with automated history matching ...

https://onepetro.org/SPEERM/proceedings-abstract/08ERM/All-08ERM/SPE-117767-MS/145421

We also compare primary drainage capillary pressure (Pc) calculated by four DRP vendors on quarter plugs with centrifuge-based ... We cleaned the plugs, measured porosity (φ) and absolute permeability (kabs), and then split the plugs into four quarter plugs ... DRP predictions for porosity ranged from 33 to 96% of the measured values, whereas permeability ranged within a factor of 0.3 ... Four commercial DRP labs conducted blind porosity and permeability predictions on those quarter plugs using (a) only micro-CT ...

https://www.onepetro.org/journal-paper/SPWLA-2018-v59n1a1

During the krmeasurements of low-permeability rocks, high capillary... ... Relative permeability ( kr) data are the key factors for describing the behaviour of the multi-phase flow in porous media. ... During the kr measurements of low-permeability rocks, high capillary pressure can cause a significant liquid hold-up at the ... Steady-State Relative Permeability Measurements of Tight and Shale Rocks Considering Capillary End Effect. ...

https://rd.springer.com/article/10.1007%2Fs11242-019-01236-8

Effect of temperature change on the permeability of eel rete capillaries.. E A Rasio, M Bendayan, C A Goresky ... The changes in the permeability properties of the rete capillaries of the eel in response to temperature shifts were studied ... From the ratio of end concentrations of arterial to venous capillaries divided by surface area, calculated from rete weight, a ... Because flow and surface area are constant, this provides an index of how permeability varies with time. A group of ...

http://circres.ahajournals.org/content/70/2/272

relative permeability. dc.title. Prediction of Capillary Pressure and Relative Permeability Curves using Conventional Pore- ... Prediction of Capillary Pressure and Relative Permeability Curves using Conventional Pore-scale Displacements and Artificial ... and two-phase capillary pressure and relative permeability curves. These parameters are then used as input to train an ANN. ANN ... In the beginning, we assume that capillary tubes are fully saturated with water and that they are strongly water-wet. Then, oil ...

https://kuscholarworks.ku.edu/handle/1808/26357?show=full

Secondly, a grain size based work flow, developed by Daza, 2012 at TNO, to calculate permeability and capillary seal capacity ... Clay formations have a high permeability which is highly preferred with nuclear waste storage. The issues with the devices is ... They established equations relating pressure coefficients to porosity and permeability, based on the clay fraction of the ... developed in his PhD thesis several equations relating effective stress to porosity and eventually porosity to permeability. ...

https://dspace.library.uu.nl/handle/1874/297319

Inhibitory effects of sasanquasaponin on over-expression of ICAM-1 and on enhancement of capillary permeability induced by ... The capillary permeability was determined spectrophotometrically. The results showed that SQS markedly lowered the levels of ... Inhibitory effects of sasanquasaponin on over-expression of ICAM-1 and on enhancement of capillary permeability induced by ... In addition, SQS dramatically inhibited the enhancement of dermal capillary permeability induced by burns in a dose-dependent ...

http://www.curehunter.com/public/pubmed15993308.do

The characteristic functions relating relative permeabilities and capillary pressures to fluid saturations (kr-S-Pc models) are ... Comparison of relative permeability-fluid saturation-capillary pressure relations in the modelling of non-aqueous phase liquid ... Different models for the capillary pressure (Pc) - fluid saturation (S) - relative permeability (kr) constitutive relations ... Relative permeability, Capillary pressure, Constitutive relations, Multi-phase flow, Modelling, NAPL, Tortuosity, Scaling ...

http://uu.diva-portal.org/smash/record.jsf?pid=diva2:169481

Nature of glomerular capillary permeability changes following acute renal ischemia-reperfusion injury in rats.. @article{ ... mTOR inhibition with temsirolimus causes acute increases in glomerular permeability, but inhibits the dynamic permeability ... Nature of glomerular capillary permeability changes following acute renal ischemia-reperfusion injury in rats.}, author={ ... renal ischaemia in rats induces a rapid secretion of inflammatory markers to renal lymph and increased capillary permeability. ...

https://www.semanticscholar.org/paper/Nature-of-glomerular-capillary-permeability-changes-Rippe-Rippe/c40797a38eb999871f72cfb2885e2c445231fc31

In this study (Contract No. G0122006), gas and water permeabilities of a large number of samples from the Pittsburgh and Pocahontas coals were measured at various overburden and mean flow pressures. (cdc.gov)
Gas permeabilities are affected to a lesser degree by mean flow pressures above atmospheric. (cdc.gov)
However at subatmospheric mean pressures, appreciable increase in permeability occurs for low permeability samples. (cdc.gov)
Plotting these values against inverse rate reveals linear trends at high rates, with slopes and intercepts that directly quantify the saturation functions in the range of negative capillary pressures. (onepetro.org)
Capillary pressures as well as relative permeabilities were determined by Chavent et al. (onepetro.org)
The model calculates threshold capillary pressures for all randomly generated geometries using Mayer-Stowe-Princen (MS-P) method and the minimization of Helmholtz free energy for every pore-scale displacement event. (ku.edu)
Specifically, we are interested in the training of ANNs to predict threshold capillary pressures and multi-phase flowrates as a function of cross-sectional shapes and wettabilities given for each capillary tube of the bundle. (ku.edu)
The characteristic functions relating relative permeabilities and capillary pressures to fluid saturations ( k r - S - P c models) are of great importance for the modelling of sub-surface multi-phase flow and transport. (diva-portal.org)
Within the bundle the capillary pressure controls the displacement sequence, and for given capillary pressures it is therefore possible to find the corresponding phase saturations in the bundle. (earthdoc.org)
We hence invert the capillary bundle model iteratively to find the capillary pressures for given saturations. (earthdoc.org)
This study is to correlate permeability with porosity to predict permeability and capillary pressures. (tamu.edu)
Pulmonary venoconstriction occurs with sympathetic stimulation, which may increase the capillary hydrostatic pressure and produce pulmonary edema without affecting left atrial or pulmonary capillary wedge pressures. (medscape.com)
Based on a predetermined water-hydrocarbon contact and using the difference between the density gradients of the fluids, the capillary pressures of the two media are converted to theoretical water saturation profiles as a function of TVD. (nitecllc.com)
In situ determination of relative permeability and capillary pressure curves using multiphase flow rates and pressures of wireline formation testers. (hw.ac.uk)

In preferentially oil-wet porous media, laboratory waterflooding experiments are prone to capillary end effects. (onepetro.org)
Relative permeability ( k r ) data are the key factors for describing the behaviour of the multi-phase flow in porous media. (springer.com)
In theories of multiphase flow through porous media, capillary pressure-saturation and relative permeability-saturation curves are assumed to be intrinsic properties of the medium. (edu.au)

A sizable oil reserves are held in a thick oil/water capillary transition zones in the carbonate reservoirs, but it is an ongoing challenge to accurately describe the relationship between capillary pressure, relative permeability and oil/water saturation due to the complex wettability variation, pore geometry and heterogeneity throughout the reservoir column. (springer.com)
The petroleum reserves and oil recovery depend heavily on several geological and petrophysical properties based on special core analysis (SCAL) such as capillary pressure and relative permeability as a function of saturation (Spearing et al. (springer.com)
2017 ). It is crucial to express the relationship between capillary pressure and relative permeability and saturation to obtain typical capillary pressure and relative permeability curves for reservoir modeling and simulation. (springer.com)
For water-wet reservoirs, a number of models have been proposed to correlate capillary pressure and relative permeability with water saturation (Masalmeh et al. (springer.com)
Capillary transition zones in carbonate reservoirs have a variety of wettability states, whereas it is more water wet at the OWC where initial oil saturation ( S oi ) equals to residual oil saturation up vertically to oil wet at the irreducible water saturation level. (springer.com)
Cost-effective exploitation of heterogeneous/anisotropic reservoirs (e.g., carbonate formations) reckons on accurate description of pore structure, dynamic petrophysical properties (e.g., directional permeability, saturation-dependent capillary pressure), and fluid distribution. (onepetro.org)
However, techniques for reliable quantification of permeability and hydrocarbon saturation still rely on model calibration using core measurements. (onepetro.org)
Furthermore, assessment of saturation-dependent capillary pressure has been limited to experimental measurements, such as mercury injection capillary pressure (MICP). (onepetro.org)
Finally, throat-size distribution, porosity, and tortuosity are used to calculate directional permeability and saturation-dependent capillary pressure. (onepetro.org)
Moreover, this new method enables real-time well-log-based assessment of saturation-dependent capillary pressure and directional permeability (in presence of directional electrical measurements) in reservoir conditions, which was not possible before. (onepetro.org)
The wetting phase (oil) will tend to accumulate at the outlet where the capillary pressure is zero and leave a highly remaining-oil saturation at steady state (defined by a stable pressure drop and a zero oil-production rate) compared to the residual-oil saturation. (onepetro.org)
2017c) derived analytical solutions describing how the capillary pressure and relative permeability of water (the injected phase) could be determined on the basis of pressure drop and average saturation at steady states obtained at different water-injection rates. (onepetro.org)
For NAPLs with non-zero spreading coefficients no exact theory currently exists for scaling two-phase capillary pressure-saturation functions to three-phase systems. (diva-portal.org)
However, for using the pore-scale model in the reservoir simulator it is required to obtain capillary pressure and relative permeability from saturation data, rather than the other way around. (earthdoc.org)
This work concerns simultaneous determination of relative permeability, capillary pressure, pore size distribution (PSD), and residual oil saturation data by optimization of well testing data, and introduces a new capillary pressure relationship, based on the Weibull distribution function, for direct determination of the PSD function from capillary pressure parameters. (begellhouse.com)
Three consecutive injection, fall off, and production well tests are performed on a predefined synthetic reservoir through simulation, and an optimization algorithm is used to find the parameters of relative permeability and capillary pressure curves as well as the value of residual oil saturation. (begellhouse.com)
This model also has potential extensions to relative permeability (i.e., the Brooks and Corey relative permeability functions) - which should make correlations based on porosity, permeability, and irreducible saturation general tools for reservoir engineering problems where relative permeability data are not available. (tamu.edu)
The new capillary-pressure model is applied to evaluate sealing capacity of seals, calculate transition zone thickness and saturation above free water level in reservoirs. (tamu.edu)
In this article, it is suggested that the nonuniqueness of capillary pressure-relative permeability-saturation relationships is due to the presence of microheterogeneities within a laboratory sample. (edu.au)
Various combinations of boundary conditions and soil heterogeneity are simulated and average capillary pressure, saturation, and relative permeability for the "soil sample" are obtained. (edu.au)
the smaller the capillary number, the larger the irreducible water saturation. (edu.au)
Ignoring of capillary pressure by JBN method will influence the calculation of relative permeability curves and final saturation levels. (utp.edu.my)
One dimensional numerical model with uniform initial saturation has been implemented in this study using Eclipse 100 software to understand the relationship between relative permeability and capillary pressure. (utp.edu.my)
Capillary pressure gradient will increase the fractional flow of water and this increase in fractional flow of water results in lower frontal water saturation, higher frontal velocity and subsequently leading to a decrease in oil recovery. (utp.edu.my)
Reservoir relative permeability and capillary pressure, as a function of saturation, is important for assessing reservoir hydrocarbon recovery, selecting the well completion method, and determining the production strategy because they are fundamental inputs to reservoir simulation for predicting lifetime production of a well. (halliburtonblog.com)

These findings, combined with data on the permeability of the basement membrane and evidence that the endothelium may be a more important barrier than often supposed, are allowing a clearer understanding to emerge of how the 3 parts of the glomerular capillary wall jointly determine its functional properties. (jci.org)
The glomerular capillary wall is a living ultrafiltration membrane. (jci.org)
As shown in Figure 1 , the glomerular capillary wall consists of a fenestrated endothelium, the glomerular basement membrane (GBM), and the interdigitated foot processes of epithelial cells (podocytes). (jci.org)
Glomerular capillary wall, consisting principally of a fenestrated endothelium, a basement membrane, and epithelial foot processes. (jci.org)
The glomerular capillary wall is an exquisitely well-engineered barrier, which is normally very permeable to water and yet able to prevent all but very minute losses from the circulation of major plasma proteins such as albumin. (umn.edu)

An automated history matching approach is proposed to determine relative permeability and capillary pressure curves consistent with a core flood reservoir model performance. (onepetro.org)
A large-scale 'Trust Region Method' that minimizes the objective function is implemented for the adjustment of parameters controlling the relative permeability and capillary pressure curves. (onepetro.org)
The results indicate that the proposed approach successfully predicts relative permeability and capillary pressure curves of a fractured core sample which provides a foundation for field-scale history matching with simultaneous estimation of transport properties. (onepetro.org)
In order to develop powerful numerical models which are used for estimating the productivity, injectivity and ultimate recovery from hydrocarbon reservoirs, the determination of the correct set of relative permeability and capillary pressure curves become important. (onepetro.org)
Knowing pore fluid occupancies, we calculate saturations, phase conductances, and two-phase capillary pressure and relative permeability curves. (ku.edu)
The result shows successful application of an optimization technique using the well testing data for determination of relative permeability, capillary pressure, and PSD curves. (begellhouse.com)
A numerical multiphase flow model is used to simulate the procedures that are commonly used in the laboratory for the measurement of capillary pressure and relative permeability curves. (edu.au)
Both drainage and imbibition capillary pressure curves are found to be strongly affected by heterogeneities and boundary conditions. (edu.au)
The following investigation focuses on the impact of capillary pressure on estimation of two phases relative permeability curves. (utp.edu.my)
The limitations in the JBN method create an error in relative permeability curves and make it unrepresentative of a typical core flooding test results. (utp.edu.my)
The results obtained have shown the influence of capillary pressure on estimating relative permeability curves. (utp.edu.my)
Furthermore, the results demonstrate that the water flooding curves differ greatly in shape and position according to the corresponding values of capillary pressure. (utp.edu.my)
Comparisons of relative permeability curves have shown that the capillary pressure dominates the displacement process. (utp.edu.my)
Furthermore, different relative permeability curves were obtained when the k r data were measured at different effective stresses. (hw.ac.uk)
Estimation of relative permeability and capillary pressure curves at reservoir conditions is also an important task for successful planning of waterflooding and enhanced oil recovery. (halliburtonblog.com)
This paper proposes a new method to obtain relative permeability and capillary pressure curves with downhole pressure-transient analysis (PTA) of mini-drillstem tests (miniDSTs) and well log-derived saturations. (halliburtonblog.com)
Combining these downhole measurements provided the relative permeability and capillary pressure curves. (halliburtonblog.com)
Relative permeability and capillary pressure curves are crucial inputs for reservoir modeling and simulation. (hw.ac.uk)
The study shows that the most important parameters are the curvatures of relative permeability and capillary pressure curves during the processes. (hw.ac.uk)

and the potential in underwater settings for exertion or panic, which can exacerbate elevated capillary pressure. (diversalertnetwork.org)

abstract = "To study the transcapillary exchange of water-soluble substances, the authors tried a new method to measure the capillary permeability surface area product (PS) under a vital microscopic field. (elsevier.com)

At any given hydrostatic pressure, one of the critical factors controlling water flux across the pulmonary capillary membrane is the permeability of that membrane to serum albumin. (umn.edu)
An increase in capillary permeability can result in neurogenic pulmonary edema without elevation of pulmonary capillary hydrostatic pressure, because causative hemodynamic alteration is inconsistent. (medscape.com)
Whether the capillary leak is produced by pressure-induced mechanical injury because of the elevated capillary hydrostatic pressure or because of some direct nervous system control over the pulmonary capillary permeability remains uncertain. (medscape.com)
Pulmonary venous congestion leads to increased pulmonary capillary hydrostatic pressure, which allows increased water diffusion out of the vasculature into the pulmonary interstitium. (vetstream.com)

Four commercial DRP labs conducted blind porosity and permeability predictions on those quarter plugs using (a) only micro-CT based tools, and (b) all the tools accessible to DRP service providers. (onepetro.org)
They established equations relating pressure coefficients to porosity and permeability, based on the clay fraction of the sample. (uu.nl)
An empirical equation is proposed to calculate displacement pressure from porosity and permeability. (tamu.edu)

the capillary endothelium was proliferated, had marked infolding, and an increased number of pinocytotic vesicles and vacuoles. (nih.gov)
The classic model describing the formation of pulmonary edema suggests that fluid crossing the capillary endothelium is drawn by negative interstitial pressure into the potential space surrounding extra-alveolar vessels and, as interstitial pressure builds, is forced into the alveolar air space. (qxmd.com)
In the current study, we sought to determine whether extravascular fluid accumulation can be produced because of increased permeability of either the capillary or extra-alveolar endothelium, and whether different pathophysiology results from such site-specific increases in permeability. (qxmd.com)
If inflammation is severe and diffuse, alveolar inflammation extends from the alveolar epithelium through to the pulmonary capillary endothelium, leading to capillary endothelial injury and increased permeability. (vetstream.com)

A simple, linear kinetic model has been developed for the noninvasive assessment of capillary permeability to macromolecules in the rat by dynamic magnetic resonance imaging using albumin-Gd-DTPA. (nih.gov)
Because the adult respiratory distress syndrome (ARDS) may be associated with an abnormality of pulmonary water, a definition of albumin kinetics across the normal pulmonary capillaries and of the normal pulmonary lymph flow is appropriate to a better understanding of the ARDS. (umn.edu)
In this article the results are reported of a study of the normal pulmonary lymph flow rate and of the normal pulmonary capillary permeability to albumin in vivo. (umn.edu)
We tested the hypothesis that albumin regulates the solute permeability coefficients (P(s)) of individually perfused exchange microvessels of the frog mesentery by mechanisms similar to those described for hydraulic conductivity. (elsevier.com)
Huxley, VH & Curry, FE 1991, ' Differential actions of albumin and plasma on capillary solute permeability ', American Journal of Physiology - Heart and Circulatory Physiology , vol. 260, no. 5 29-5. (elsevier.com)
Changes in capillary permeability were quantitated by determining the lymph-to-plasma (L/P) ratios for albumin and globulin. (utmb.edu)
The L/P ratio for albumin and globulin decreased indicating no protein permeability change. (utmb.edu)
Forces that decrease the rate of movement of water from the interstitial space into the plasma include decreased serum albumin, right-sided heart failure in which edema occurs as a consequence of increased pressure in the systemic venous circulation, increased capillary permeability, and increased oncotic pressure in the interstitium due to accumulation of protein as occurs with blockage of lymphatic vessels (Ahmad, 1999) (see Figure 1). (thefreelibrary.com)
Albondin-mediated capillary permeability to albumin. (wikipedia.org)

Basal fractional vascular volume (FVV) was similar among the groups, but its response to adenosine was significantly attenuated in HTN, whereas microvascular permeability (MP) and response to adenosine were greater than normal. (biomedsearch.com)

It has been shown that a proper interpretation of relative permeability and capillary pressure including hysteresis has a substantial influence on the prediction and optimization of field production, especially for a heterogeneous carbonate reservoir with a thick transition zone. (springer.com)
After the 1960s, a novel technique, history matching, where relative permeabilities and capillary pressure as well as absolute permeability, and porosity are adapted using a reservoir simulator was introduced to achieve a reservoir representation in an agreement with the observed reservoir performance. (onepetro.org)
He calculated the areal permeability distribution of the reservoir using history matching approach. (onepetro.org)
Archer and Wong (1973) applied similar approach in reservoir characterization and description to obtain relative permeabilities from core flood experiments. (onepetro.org)
WAG flooding of an oil reservoir can give rise to large regions of three-phase flow, where the flow parameters, i.e. capillary pressure and relative permeability, are history dependent. (earthdoc.org)
The idea of this work is to connect a pore-scale model that calculates capillary pressure and relative permeability for given saturations to a three-phase reservoir simulator. (earthdoc.org)
Incorporation of the bundle model into the simulator demonstrates the effects of consistent pore-scale based three-phase capillary pressure and relative permeability for different wettability on the continuum, i.e. reservoir scale. (earthdoc.org)
Knowledge of reservoir porosity, permeability, and capillary pressure is essential to exploration and production of hydrocarbons. (tamu.edu)
Accurate relative permeability is a crucial parameter for evaluating reservoir performance. (utp.edu.my)
Consequently, the inclusion of heterogeneities in capillary pressure and relative permeability functions, where and when applicable, advances a Darcy modelling approach to history matching and forecasting of reservoir performance. (coventry.ac.uk)
For the non-fractured reservoir, the dual porosity formulation enabled us to accurately upscale the capillary pressure functions by default. (nitecllc.com)

The PSD function is also determined from capillary pressure relationship parameters. (begellhouse.com)

A formulation for the daily care of sensitive skin with dilated capillaries and tendency to periodic hyperactivity occurring due to external factors, such as sudden changes in temperature, strong emotions, alcohol or spicy food. (pharmaceris.com)
Recommended for daily use for the sensitive skin with dilated capillaries and the skin which is proneto periodic hyper-reactivity triggered by such external factors as temperature, intense emotions, or the consumption of alcohol or spicy foods. (pharmaceris.com)

Permeability of retinal capillaries in rats with inherited retinal degeneration. (arvojournals.org)
The permeability of retinal capillaries in RCS rats with inherited retinal degeneration was investigated with horseradish peroxidase used as a tracer. (arvojournals.org)
Five-week-old rats showed typical degeneration of photoreceptor cells and accumulation of outer segment debris, but retinal capillaries were not permeable to peroxidase. (arvojournals.org)
Inhibitory effects of sasanquasaponin on over-expression of ICAM-1 and on enhancement of capillary permeability induced by burns in rats. (curehunter.com)
The purpose of this study was to investigate the effects of sasanquasaponin (SQS) on ICAM-1 expression and capillary permeability induced by burns in rats. (curehunter.com)
PDF] Nature of glomerular capillary permeability changes following acute renal ischemia-reperfusion injury in rats. (semanticscholar.org)
Unilateral renal ischaemia in rats induces a rapid secretion of inflammatory markers to renal lymph and increased capillary permeability. (semanticscholar.org)
Effects of tetrandrine on pulmonary capillary permeability in rats with acute lung injury induced by lipopolysaccharide]. (semanticscholar.org)
OBJECTIVE To observe the effects of tetrandrine (Tet) on the pulmonary capillary permeability in rats with acute lung injury induced by intravenous injection of lipopolysaccharide (LPS). (semanticscholar.org)
To investigate the effect of retigabine on the blood-brain barrier permeability in rats with cerebral ischemia-reperfusion and its mechanism. (bioportfolio.com)

Loss of circulating volume in anaphylaxis is due to a combination of increased capillary permeability with fluid extravasation into the interstitial space and sequestration in grossly dilated vascular beds leading to a profound reduction in venous return. (thefreedictionary.com)
A compartmental pharmacokinetic model was developed for the analysis of the in vivo data to provide plasma-to-tissue transport constants (capillary permeability-area products), binding parameters (products of the association constant and the initial binding site concentration), and the interstitial fluid flow rate. (aacrjournals.org)
The efficiency of hydrocarbon recovery from oil and gas reservoirs is mainly controlled by our ability to understand and define fluid transport properties, such as relative permeability and capillary pressure. (onepetro.org)
Specifically, we simulate fluid displacement sequences during a drainage process in bundles of capillary tubes with randomly generated convex polygon cross-sections. (ku.edu)
That's because immersion in an upright position causes a significant shift of fluid from the peripheral to the central circulatory system, resulting in higher pressure in the capillaries of the pulmonary system. (diversalertnetwork.org)
A central nervous system event produces a dramatic change in Starling forces, which govern the movement of fluid between capillaries and the interstitium. (medscape.com)
In acute respiratory distress syndrome, pulmonary vascular permeability increases, causing intravascular fluid and protein to move into the lung's interstitium. (qxmd.com)
Both treatments produced equal increases in whole lung vascular permeability, but caused fluid accumulations in separate anatomical compartments. (qxmd.com)
Examination of these parameters indicate that for the gravity current of CO2 transiting through a heterogeneous siliciclastic formation, the local capillary forces in geologic units, such as mudstone and sandstones, and the relative permeability to the invading fluid control the mass of CO2 that breaches and percolates through each unit, respectively. (coventry.ac.uk)
Pulmonary congestion is characterised by increased interstitial and/or alveolar fluid caused by an increased capillary pressure (cardiac) or an increased permeability of the pulmonary vessels [ 1 ]. (smw.ch)

2014 ). The thickness of a capillary transition zone may vary from a few feet in high-permeability reservoirs to more than 300 feet in low-permeability reservoirs such as carbonate reservoirs, due to its extreme heterogeneity. (springer.com)
Finally, we perform a waterflooding experiment in the laboratory on a high-permeability (3 darcies) Bentheimer sandstone core, altered to an oil-wet state. (onepetro.org)
Clay formations have a high permeability which is highly preferred with nuclear waste storage. (uu.nl)

The sensitivity analysis shows more sensitivity of objective function (OF) values for variations encountered with the water exponent in the relative permeability curve (m) and the C parameter of the capillary pressure relationship in comparison to the other parameters. (begellhouse.com)
This investigation focussed on two key parameters affecting CO2 migration mobility, namely relative permeability and capillary forces. (coventry.ac.uk)
The effect of high frequency oscillatory ventilation (HFOV) at early stage on hemodynamic parameters , extravascular lung water (EVLW), lung capillary permeability , CC16 and sICAM-1 in piglets with pulmonary or extrapulmonary acute respiratory distress syndrome (ARDS) was explored. (bvsalud.org)

To determine whether increased permeability in a blood-brain barrier model correlated with the malignancy of a co-cultured brain tumor, the authors established an in vitro brain capillary endothelial monolayer co-culture model. (jkns.or.kr)
The benign cell co-culture model used co-cultured astrocytoma cell lines such as C6 and H683 in the second compartment of a brain capillary endothelial monolayer culture model circumscribed with a 0.4u sized porous membrane which permitted communication of the media but limited cell migration to another compartment, and the malignant cell co-culture model used co-cultured glioblastoma cell lines such as 87MG and 373MG. (jkns.or.kr)
To investigate the effect of hypoxia on the permeability changes, we used a cell culture model of the BBB consisting of a co-culture of brain capillary endothelial cells and glial cells. (archives-ouvertes.fr)

In the present work, a study has been conducted to provide an improved understanding of capillary pressure and relative permeability of the transition zones in carbonate reservoirs by implementing and optimizing recently developed models considering mixed-wet property and geological heterogeneity. (springer.com)
2002 ). However, it is difficult to precisely correlate the capillary pressure and relative permeability in the transition zones of carbonate reservoirs due to its high degree of heterogeneity and complex properties of wettability. (springer.com)
Phenotypic heterogeneity in lung capillary and extra-alveolar endothelial cells. (qxmd.com)
This is the peer reviewed version of the following article: Onoja, MU & Shariatipour, SM 2019, 'Assessing the impact of relative permeability and capillary heterogeneity on Darcy flow modelling of CO 2 storage in Utsira Formation' Greenhouse Gases: Science and Technology, vol. 9, no. 6, https://doi.org/10.1002/ghg.1932, pp. 1221-1246, which has been published in final form at https://dx.doi.org/10.1002/ghg.1932. (coventry.ac.uk)
Onoja, MU & Shariatipour, SM 2019, ' Assessing the impact of relative permeability and capillary heterogeneity on Darcy flow modelling of CO 2 storage in Utsira Formation ' Greenhouse Gases: Science and Technology , vol. 9, no. 6, pp. 1221-1246. (coventry.ac.uk)

The conventional models, such as Corey method and Leverett J-function, cannot precisely present the behaviors of capillary pressure and relative permeability of transition zones in carbonate reservoirs. (springer.com)
Development of Techniques and the Measurement of Relative Permeability and Capillary Pressure Relationships in Coal. (cdc.gov)
Air and water relative permeabilities were also measured for numerous samples of Pittsburgh and Pocahontas coals. (cdc.gov)
Our aim is to demonstrate how pressure drop and oil production at steady state for different water-injection rates can be used to derive relative permeability and capillary pressure from waterflooding. (onepetro.org)
The experimental procedure and model demonstrate that only water relative permeability and capillary pressure determine the steady state during waterflooding, and hence can be estimated accurately. (onepetro.org)
This study focuses on the development and implementation of a numerical model of multiphase flow in a fractured core sample by establishing a proper physical framework that describes the capillary pressure-relative permeability characteristics. (onepetro.org)
This liquid hold-up, which is known as capillary end effect (CEE), is the main difficulty for laboratory measurements of relative permeability ( k r ) for tight and shale rocks. (springer.com)
In this paper, a novel method is proposed to correct the CEE during the steady-state relative permeability (SS- k r ) measurements. (springer.com)
Gupta and Maloney ( 2016 ) proposed the intercept technique to correct CEE during relative permeability measurements. (springer.com)
This means that three-phase capillary pressure and relative permeability data have to be updated during the flow to account accurately for hysteresis. (earthdoc.org)
Moreover, relative permeability is assumed to be a scalar property. (edu.au)
For example, relative permeability is known to be affected by the flow velocity (or pressure gradient) at which the measurements are carried out. (edu.au)
Our results reveal that there is much need for laboratory experiments aimed at investigating the interplay of boundary conditions and microheterogeneities and their effect on capillary pressure and relative permeability. (edu.au)
The unsteady state core flooding tests, which is considered in this study, is mostly used to measure oil-water relative permeabilities. (utp.edu.my)
The Johnson ,Bossler and Neumann (JBN) method is the conventional method for estimating relative permeabilities from field core. (utp.edu.my)
Pressure drop and recovery data obtained from 1-D numerical simulations are used to estimate the relative permeabilities by JBN method. (utp.edu.my)
It is shown that increase in capillary pressure increases the water relative permeability. (utp.edu.my)
You can download and read online Advanced Petrophysics: Volume 2: Dispersion, Interfacial Phenomena/Wettability, Capillarity/Capillary Pressure, Relative Permeability file PDF Book only if you are registered here. (likapelaja.ml)
And also you can download or read online all Book PDF file that related with Advanced Petrophysics: Volume 2: Dispersion, Interfacial Phenomena/Wettability, Capillarity/Capillary Pressure, Relative Permeability book. (likapelaja.ml)
It's free to register here to get Book file PDF Advanced Petrophysics: Volume 2: Dispersion, Interfacial Phenomena/Wettability, Capillarity/Capillary Pressure, Relative Permeability Pocket Guide. (likapelaja.ml)
Sorbie, KS , Hua, G & McDougall, SR 1999, Measurement of relative permeability and capillary pressure at the laminaset scale . (hw.ac.uk)
Relative permeability (k r ) functions are among the essential data required for the simulation of multiphase flow in hydrocarbon reservoirs. (hw.ac.uk)
However, relative permeability measurement of shale rocks is extremely difficult mainly because of the low/ultralow matrix permeability and porosity, dominant capillary pressure and stress-dependent permeability of these formations. (hw.ac.uk)
In this study, the impacts of stress and capillary end effects (CEE) on the measured relative permeability data were investigated. (hw.ac.uk)
The steady state relative permeability (SS-k r ) measurements were performed on Eagle Ford and Pierre shale samples. (hw.ac.uk)
It is evident that the behavior of unconventional reservoirs can be better predicted when more reliable and accurate relative permeability data are available. (hw.ac.uk)
The relative permeability and capillary pressure data estimated from core analysis might cause concern regarding representativeness, and adjustments are typically necessary for successful production forecasting. (halliburtonblog.com)
Analyses of the miniDST buildup tests provided absolute formation permeability, endpoints of relative permeability to both oil and water, and curvature of the relative permeability data. (halliburtonblog.com)
The proposed methodology estimates multiphase flow properties occurring near the wellbore, such as relative permeability, capillary pressure, damage skin and mud-filtrate invasion by inversion of water-cut and bottomhole pressure recorded during the WFT cleanup. (hw.ac.uk)
The results from synthetic and field examples demonstrate that relative permeability and capillary pressure, mud-filtrate invasion, damage skin can be estimated successfully in the inversion process. (hw.ac.uk)

The function of the mural components involved in vascular exchange (pinocytotic vesicles, fenestrations, intercellular junctions, and the basal lamina) was assessed by intravascular injection of tracers (carbon, carbon plus histamine, ferritin, hemoglobin, and myoglobin) on separate gestational days in fetal and neonatal rat intestinal capillaries. (elsevier.com)
Bankston, Patrick W. / Fetal and neonatal rat intestinal capillaries : Permeability to carbon, ferritin, hemoglobin, and myoglobin . (elsevier.com)
Porter, GA & Bankston, PW 1987, ' Functional maturation of the capillary wall in the fetal and neonatal rat heart: Permeability characteristics of developing myocardial capillaries ', American Journal of Anatomy , vol. 180, no. 4, pp. 323-331. (elsevier.com)
Bankston, Patrick W. / Functional maturation of the capillary wall in the fetal and neonatal rat heart : Permeability characteristics of developing myocardial capillaries . (elsevier.com)

The continuous capillaries present through day 17 of gestation were impermeable, even at junctions, to all the tracers within the maximum circulation time studied (3 minutes). (elsevier.com)

Extravascular lung water and pulmonary vascular permeability index as markers predictive of postoperative acute respiratory distress syndrome: a prospective cohort investigation. (qxmd.com)
EVLW index (EVLWI), EVLW/intratroracic blood volume (ITBV) and pulmonary vascular permeability index (PVPI) were measured before and after modeling (T0 and T1), and T2 (1 h), T3 (2 h), T4 (3 h) and T5 (4 h) after HFOV. (bvsalud.org)

The division of the porosity is based on the assumption that the total porosity of the system is made up from two contributing rock types or lithofacies that have distinct pore size and/or pore size distribution such that they can be represented by different capillary pressure functions. (nitecllc.com)

It was concluded that EVLWI and lung capillary permeability were markedly increased in ARDSp and ARDSexp groups. (bvsalud.org)
No significant differences were found in the decreases in EVLW and lung capillary permeability 4 h after HFOV. (bvsalud.org)

The aim was to evaluate the effect of 5-aminosalicylic acid on myocardial capillary permeability for small hydrophilic molecules after ischaemia and reperfusion. (ku.dk)
The develpment of the functional components of the myocardial capillary wall was characterized by time-course studies of transendothelial transport of intravascularly injected probes of graded size from 16 days of gestation in the fetal rat to seven days postpartum. (elsevier.com)

We cleaned the plugs, measured porosity ( φ ) and absolute permeability ( k abs ), and then split the plugs into four quarter plugs that are each 1.5-in. (onepetro.org)

We examined ultrastructural findings of capillaries of these tumors and discussed the causes of cerebral edema as compared with those of glioblastoma which were previously reported. (nih.gov)
The following list of conditions have ' Edema due to increased capillary permeability in children ' or similar listed as a symptom in our database. (rightdiagnosis.com)
The result suggested that some factor soluble in media secreted from co-cultured cells changes the permeability of the endothelial monolayer and could explain the pathogenetic mechanism of peritumoral edema in malignant brain tumors. (jkns.or.kr)
Impaired capillary integrity after severe thermal injury results in edema formation in both burned and non-burned soft tissue and also in the lung. (utmb.edu)
These three fractions were investigated for anti-peritoneal capillary permeability, in vitro nitric oxide scavenging activity, anti-inflammatory and nitric oxide (NO) inhibition using carrageenan-induced hind paw edema method. (mdpi.com)
Edema (interstitial and then alveolar) occurs when the pulmonary lymphatic system is overwhelmed and can no longer deal with the increased water movement out of the capillaries. (vetstream.com)
Capillary permeability edema ensues. (vetstream.com)

There were associations between alveolar-capillary permeability and BAL myeloperoxidase (r = 0.4, p = 0.038) and BAL interleukin 8 (r = 0.38, p = 0.033). (bmj.com)
After 4 h, total leukocyte and differential cell counts (neutrophils and mononuclear), myeloperoxidase (MPO) activity, vascular permeability and cytokine levels were evaluated. (hindawi.com)

Our findings suggest that insults leading to acute respiratory distress syndrome may increase permeability in extra-alveolar or capillary vascular segments, resulting in different pathophysiological sequela. (qxmd.com)

When endothelial cells were incubated in presence of glial cells, a huge increase in permeability occurred after 9 h of hypoxic conditions. (archives-ouvertes.fr)
Oxygen glucose deprivation (OGD) resulted in a much shorter time (i.e. 2 h) required for an increase in permeability. (archives-ouvertes.fr)

Curry, FE 1979, ' Antipyrene permeability in single perfused capillaries of frog mesentery ', Federation Proceedings , vol. 38, no. 3 II. (elsevier.com)
1. We have investigated the effects of various potential inhibitors on flow-dependent K + permeability (P(K)) of single perfused mesenteric microvessels in pithed frogs. (elsevier.com)
Kajimura, M & Michel, CC 1999, ' Inhibition of effects of flow on potassium permeability in single perfused frog mesenteric capillaries ', Journal of Physiology , 巻. (elsevier.com)

When endothelial cells from this co-culture model were submitted alone to hypoxic conditions, long exposures (48 h) were necessary to result in an increase in endothelial cell monolayer permeability to [ 3 H]inulin. (archives-ouvertes.fr)
Sudden but transient overload of the pulmonary circulation leads to capillary wall stress failure and acute damage to pulmonary capillary endothelial cell tight junctions. (vetstream.com)

The fundamental nature of the clearance curve was studied, including the effect of the local capillary flow. (elsevier.com)

The study of changes in cardiac permeability with chemotherapy could enhance the understanding of mechanisms behind cardiac damage, and provide useful information to evaluate anthracycline cardiotoxicity. (springer.com)
An isolated heart experiment was done on day 12 to obtain perfused heart pressure values, and to measure cardiac capillary permeability using a Texas Red/sodium fluorescein multiple indicator dilution method. (springer.com)
Based on our results, cardiac capillary permeability changes can be detected after in vivo chemotherapy treatment using our fluorescent multiple indicator dilution technique, and may provide valuable information in evaluating cardiotoxicity of novel drugs. (springer.com)

The permeability and capillary entry pressure of chalk reservoirs are controlled by their porosity and specific surface area. (geoscienceworld.org)

Capillary Permeability" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (wakehealth.edu)

Advances in Physiological Sciences, Volume 7: Cardiovascular Physiology: Microcirculation and Capillary Exchange is a collection of papers that tackles the advances in the understanding of microcirculation and capillary exchange. (elsevier.com)

Alveolar-capillary permeability was measured in vivo by thermodilution (PiCCO). (bmj.com)

We also compare primary drainage capillary pressure ( P c ) calculated by four DRP vendors on quarter plugs with centrifuge-based gas-water measurements conducted in-house on companion plugs. (onepetro.org)

From the ratio of end concentrations of arterial to venous capillaries divided by surface area, calculated from rete weight, a value for the ratio of permeability to flow, P/F, with dimensions in centimeters-2 was estimated. (ahajournals.org)

The pore-scale model comprises a bundle of cylindrical capillary tubes of different radii and wettability, which are randomly distributed according to the given density functions. (earthdoc.org)

DRP predictions for porosity ranged from 33 to 96% of the measured values, whereas permeability ranged within a factor of 0.3 to 4 from the experimental measurements. (onepetro.org)
From the experimental data, it was observed that the measured SS-k r data of the shale samples have been influenced by the capillary end effects as the data showed significant variation when measured at different injection rates (with the same LGR). (hw.ac.uk)

The changes in the permeability properties of the rete capillaries of the eel in response to temperature shifts were studied during countercurrent perfusion at constant flow and pressure. (ahajournals.org)
Because flow and surface area are constant, this provides an index of how permeability varies with time. (ahajournals.org)
To do so, we have generated multi-phase flow properties for two large datasets consisting of 40,000 and 60,000 capillary tubes each. (ku.edu)
We explain the results with a one-dimensional model characterizing the flow in the narrow gaps on either side of the obstacle, which identifies a surface-tension-driven instability associated with a variation in the permeability in the flow direction. (harvard.edu)
The rate of blood flow to the tissue capillaries varies widely. (gafacom.website)

This finding is consistent with observations by others that tumor vasculature is more permeable than are normal muscle capillaries. (aacrjournals.org)
However, the validity of this model is challenged by animal models of acute lung injury in which extra-alveolar vessels are more permeable than capillaries under a variety of conditions. (qxmd.com)

Colchicine inhibits elevations in both alveolar-capillary membrane permeability and lavage surfactant after exposure of the rat to phosgene. (cdc.gov)
Changes were measured in the permeability of the alveolar capillary membrane and lavage surfactant concentrations following phosgene (75445) exposure and the influence of colchicine on both. (cdc.gov)
We perfused isolated lungs with either the plant alkaloid thapsigargin, which increases extra-alveolar endothelial permeability, or with 4alpha-phorbol 12, 13-didecanoate, which increases capillary endothelial permeability. (qxmd.com)

Anatomy10

Organisms2

Diseases6

Chemicals and Drugs15

Analytical, Diagnostic and Therapeutic Techniques and Equipment7

Phenomena and Processes12

Information Science3

Potent mast cell degranulation and vascular permeability triggered by urocortin through activation of corticotropin-releasing hormone receptors. (1/3442)

Reduction of sodium deoxycholic acid-induced scratching behaviour by bradykinin B2 receptor antagonists. (2/3442)

Role for nitric oxide in the hyperpermeability and hemodynamic changes induced by intravenous VEGF. (3/3442)

Strain-dependent induction of allergic sensitization caused by peanut allergen DNA immunization in mice. (4/3442)

Antipsoriatic, anti-inflammatory, and analgesic effects of an extract of red propolis. (5/3442)

Endogenous nitric oxide in the maintenance of rat microvascular integrity against widespread plasma leakage following abdominal laparotomy. (6/3442)

Neurogenic plasma leakage in mouse airways. (7/3442)

Enhancement of fluid filtration across tumor vessels: implication for delivery of macromolecules. (8/3442)

Capillary Permeability

Capillaries

Pheniramine

Capillary Leak Syndrome

Permeability

Serum Albumin, Radio-Iodinated

Dermatitis, Exfoliative

Dicloxacillin

Paramethasone

Pulmonary Edema

Edema

Serum Albumin

Cell Membrane Permeability

Ovarian Hyperstimulation Syndrome

Plasma Volume

Electrophoresis, Capillary

Fluorescein

Histamine

Lung

Blood Volume

Perfusion

Endothelium, Vascular

Rabbits

Biological Transport

Capillary Action

Rats, Wistar

Time Factors

Models, Biological

Capillary Resistance

Hemangioma, Capillary

Capillary Electrochromatography

Blood-Brain Barrier

Tight Junctions

Dictionaries, Medical

Dictionaries as Topic

Vascular Endothelial Growth Factors

Lymphokines

Dextrans

Stromal Cells

Coculture Techniques

Nerve Net

Neovascularization, Physiologic

Algorithms

Magnetic Resonance Imaging

Gadolinium DTPA

Contrast Media

Pelvic Floor

Phosgene

Colchicine

Pulmonary Diffusing Capacity

Blood-Air Barrier

Pulmonary Alveoli

Chlorofluorocarbons, Methane

Potent mast cell degranulation and vascular permeability triggered by urocortin through activation of corticotropin-releasing hormone receptors. (1/3442)

Reduction of sodium deoxycholic acid-induced scratching behaviour by bradykinin B2 receptor antagonists. (2/3442)

Role for nitric oxide in the hyperpermeability and hemodynamic changes induced by intravenous VEGF. (3/3442)

Strain-dependent induction of allergic sensitization caused by peanut allergen DNA immunization in mice. (4/3442)

Antipsoriatic, anti-inflammatory, and analgesic effects of an extract of red propolis. (5/3442)

Endogenous nitric oxide in the maintenance of rat microvascular integrity against widespread plasma leakage following abdominal laparotomy. (6/3442)

Neurogenic plasma leakage in mouse airways. (7/3442)

Enhancement of fluid filtration across tumor vessels: implication for delivery of macromolecules. (8/3442)

Magnitude-dependent regulation of pulmonary endothelial cell barrier function by cyclic stretch<...

Capillary permeability factor | Define Capillary permeability factor at Dictionary.com

Vascular permeability factor/vascular endothelial growth factor and the significance of microvascular hyperpermeability in...

Rapid calcium-dependent reduction of intraendothelial cAMP: A trigger to increase vascular permeability?<...

Fibrinogen-γ C-Terminal fragments induce endothelial barrier dysfunction and microvascular leak via integrin-mediated and RhoA...

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