Hematocrit. Medical search

The volume of packed RED BLOOD CELLS in a blood specimen. The volume is measured by centrifugation in a tube with graduated markings, or with automated blood cell counters. It is an indicator of erythrocyte status in disease. For example, ANEMIA shows a low value; POLYCYTHEMIA, a high value.

Reduction of blood viscosity usually by the addition of cell free solutions. Used clinically (1) in states of impaired microcirculation, (2) for replacement of intraoperative blood loss without homologous blood transfusion, and (3) in cardiopulmonary bypass and hypothermia.

The internal resistance of the BLOOD to shear forces. The in vitro measure of whole blood viscosity is of limited clinical utility because it bears little relationship to the actual viscosity within the circulation, but an increase in the viscosity of circulating blood can contribute to morbidity in patients suffering from disorders such as SICKLE CELL ANEMIA and POLYCYTHEMIA.

The number of RED BLOOD CELLS per unit volume in a sample of venous BLOOD.

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

The oxygen-carrying proteins of ERYTHROCYTES. They are found in all vertebrates and some invertebrates. The number of globin subunits in the hemoglobin quaternary structure differs between species. Structures range from monomeric to a variety of multimeric arrangements.

Glycoprotein hormone, secreted chiefly by the KIDNEY in the adult and the LIVER in the FETUS, that acts on erythroid stem cells of the BONE MARROW to stimulate proliferation and differentiation.

A reduction in the number of circulating ERYTHROCYTES or in the quantity of HEMOGLOBIN.

An increase in the total red cell mass of the blood. (Dorland, 27th ed)

Volume of circulating ERYTHROCYTES . It is usually measured by RADIOISOTOPE DILUTION TECHNIQUE.

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

Repetitive withdrawal of small amounts of blood and replacement with donor blood until a large proportion of the blood volume has been exchanged. Used in treatment of fetal erythroblastosis, hepatic coma, sickle cell anemia, disseminated intravascular coagulation, septicemia, burns, thrombotic thrombopenic purpura, and fulminant malaria.

ERYTHROCYTE size and HEMOGLOBIN content or concentration, usually derived from ERYTHROCYTE COUNT; BLOOD hemoglobin concentration; and HEMATOCRIT. The indices include the mean corpuscular volume (MCV), the mean corpuscular hemoglobin (MCH), and the mean corpuscular hemoglobin concentration (MCHC).

Puncture of a vein to draw blood for therapeutic purposes. Bloodletting therapy has been used in Talmudic and Indian medicine since the medieval time, and was still practiced widely in the 18th and 19th centuries. Its modern counterpart is PHLEBOTOMY.

Red blood cells. Mature erythrocytes are non-nucleated, biconcave disks containing HEMOGLOBIN whose function is to transport OXYGEN.

Tests used in the analysis of the hemic system.

Measurement of hemoglobin concentration in blood.

The formation of clumps of RED BLOOD CELLS under low or non-flow conditions, resulting from the attraction forces between the red blood cells. The cells adhere to each other in rouleaux aggregates. Slight mechanical force, such as occurs in the circulation, is enough to disperse these aggregates. Stronger or weaker than normal aggregation may result from a variety of effects in the ERYTHROCYTE MEMBRANE or in BLOOD PLASMA. The degree of aggregation is affected by ERYTHROCYTE DEFORMABILITY, erythrocyte membrane sialylation, masking of negative surface charge by plasma proteins, etc. BLOOD VISCOSITY and the ERYTHROCYTE SEDIMENTATION RATE are affected by the amount of erythrocyte aggregation and are parameters used to measure the aggregation.

The number of LEUKOCYTES and ERYTHROCYTES per unit volume in a sample of venous BLOOD. A complete blood count (CBC) also includes measurement of the HEMOGLOBIN; HEMATOCRIT; and ERYTHROCYTE INDICES.

Any liquid used to replace blood plasma, usually a saline solution, often with serum albumins, dextrans or other preparations. These substances do not enhance the oxygen- carrying capacity of blood, but merely replace the volume. They are also used to treat dehydration.

A metallic element with atomic symbol Fe, atomic number 26, and atomic weight 55.85. It is an essential constituent of HEMOGLOBINS; CYTOCHROMES; and IRON-BINDING PROTEINS. It plays a role in cellular redox reactions and in the transport of OXYGEN.

The transfer of erythrocytes from a donor to a recipient or reinfusion to the donor.

An examination of chemicals in the blood.

The number of RETICULOCYTES per unit volume of BLOOD. The values are expressed as a percentage of the ERYTHROCYTE COUNT or in the form of an index ("corrected reticulocyte index"), which attempts to account for the number of circulating erythrocytes.

The production of red blood cells (ERYTHROCYTES). In humans, erythrocytes are produced by the YOLK SAC in the first trimester; by the liver in the second trimester; by the BONE MARROW in the third trimester and after birth. In normal individuals, the erythrocyte count in the peripheral blood remains relatively constant implying a balance between the rate of erythrocyte production and rate of destruction.

PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.

An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.

Method for determining the circulating blood volume by introducing a known quantity of foreign substance into the blood and determining its concentration some minutes later when thorough mixing has occurred. From these two values the blood volume can be calculated by dividing the quantity of injected material by its concentration in the blood at the time of uniform mixing. Generally expressed as cubic centimeters or liters per kilogram of body weight.

The deformation and flow behavior of BLOOD and its elements i.e., PLASMA; ERYTHROCYTES; WHITE BLOOD CELLS; and BLOOD PLATELETS.

The introduction of whole blood or blood component directly into the blood stream. (Dorland, 27th ed)

The techniques used to draw blood from a vein for diagnostic purposes or for treatment of certain blood disorders such as erythrocytosis, hemochromatosis, polycythemia vera, and porphyria cutanea tarda.

Proteins that are present in blood serum, including SERUM ALBUMIN; BLOOD COAGULATION FACTORS; and many other types of proteins.

Therapy for the insufficient cleansing of the BLOOD by the kidneys based on dialysis and including hemodialysis, PERITONEAL DIALYSIS, and HEMODIAFILTRATION.

The end-stage of CHRONIC RENAL INSUFFICIENCY. It is characterized by the severe irreversible kidney damage (as measured by the level of PROTEINURIA) and the reduction in GLOMERULAR FILTRATION RATE to less than 15 ml per min (Kidney Foundation: Kidney Disease Outcome Quality Initiative, 2002). These patients generally require HEMODIALYSIS or KIDNEY TRANSPLANTATION.

The mildest form of erythroblastosis fetalis in which anemia is the chief manifestation.

Ability of ERYTHROCYTES to change shape as they pass through narrow spaces, such as the microvasculature.

Solutions having the same osmotic pressure as blood serum, or another solution with which they are compared. (From Grant & Hackh's Chemical Dictionary, 5th ed & Dorland, 28th ed)

A vertical distance measured from a known level on the surface of a planet or other celestial body.

The condition that results from excessive loss of water from a living organism.

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

The number of PLATELETS per unit volume in a sample of venous BLOOD.

Anemia characterized by a decrease in the ratio of the weight of hemoglobin to the volume of the erythrocyte, i.e., the mean corpuscular hemoglobin concentration is less than normal. The individual cells contain less hemoglobin than they could have under optimal conditions. Hypochromic anemia may be caused by iron deficiency from a low iron intake, diminished iron absorption, or excessive iron loss. It can also be caused by infections or other diseases, therapeutic drugs, lead poisoning, and other conditions. (Stedman, 25th ed; from Miale, Laboratory Medicine: Hematology, 6th ed, p393)

Starches that have been chemically modified so that a percentage of OH groups are substituted with 2-hydroxyethyl ether groups.

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

Substances that are used in place of blood, for example, as an alternative to BLOOD TRANSFUSIONS after blood loss to restore BLOOD VOLUME and oxygen-carrying capacity to the blood circulation, or to perfuse isolated organs.

The minute vessels that connect the arterioles and venules.

The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.

The mass or quantity of heaviness of an individual. It is expressed by units of pounds or kilograms.

Reinfusion of blood or blood products derived from the patient's own circulation. (Dorland, 27th ed)

A myeloproliferative disorder of unknown etiology, characterized by abnormal proliferation of all hematopoietic bone marrow elements and an absolute increase in red cell mass and total blood volume, associated frequently with splenomegaly, leukocytosis, and thrombocythemia. Hematopoiesis is also reactive in extramedullary sites (liver and spleen). In time myelofibrosis occurs.

Iron-containing proteins that are widely distributed in animals, plants, and microorganisms. Their major function is to store IRON in a nontoxic bioavailable form. Each ferritin molecule consists of ferric iron in a hollow protein shell (APOFERRITINS) made of 24 subunits of various sequences depending on the species and tissue types.

A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.

Loss of blood during a surgical procedure.

The circulation of the BLOOD through the MICROVASCULAR NETWORK.

Large members of the FALCONIFORMES order of birds, family Accipitridae, most especially the genera Aquila, Haliaeetus, Harpia, and Circaetus. They are characterized by their powerful talons, which carry long, curved, pointed claws and by their opposable hindtoe.

The study of the deformation and flow of matter, usually liquids or fluids, and of the plastic flow of solids. The concept covers consistency, dilatancy, liquefaction, resistance to flow, shearing, thixotrophy, and VISCOSITY.

The circulation of blood through the BLOOD VESSELS of the BRAIN.

The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.

The taking of a blood sample to determine its character as a whole, to identify levels of its component cells, chemicals, gases, or other constituents, to perform pathological examination, etc.

Relaxin is a potent renal vasodilator in conscious rats. (1/3107)

The kidneys and other nonreproductive organs vasodilate during early gestation; however, the "pregnancy hormones" responsible for the profound vasodilation of the renal circulation during pregnancy are unknown. We hypothesized that the ovarian hormone relaxin (RLX) contributes. Therefore, we tested whether the administration of RLX elicits renal vasodilation and hyperfiltration in conscious adult, intact female rats. After several days of treatment with either purified porcine RLX or recombinant human RLX 2 (rhRLX), effective renal plasma flow (ERPF) and glomerular filtration rate (GFR) increased by 20%-40%. Comparable renal vasodilation and hyperfiltration was also observed in ovariectomized rats, suggesting that estrogen and progesterone are unnecessary for the renal response to rhRLX. The nitric oxide synthase inhibitor Nomega-nitro-L-arginine methyl ester completely abrogated the increase in ERPF and GFR elicited by chronic administration of purified porcine RLX. In contrast, the renal vasoconstrictory response to angiotensin II was attenuated by the RLX treatment. Short-term infusion of purified porcine RLX to conscious rats over several hours failed to increase ERPF and GFR. Plasma osmolality was consistently reduced by the chronic administration of both RLX preparations. In conclusion, the renal and osmoregulatory effects of chronic RLX administration to conscious rats resemble the physiological changes of pregnancy in several respects: (a) marked increases in ERPF and GFR with a mediatory role for nitric oxide; (b) attenuation of the renal circulatory response to angiotensin II; and (c) reduction in plasma osmolality. (+info)

O-raffinose cross-linking markedly reduces systemic and renal vasoconstrictor effects of unmodified human hemoglobin. (2/3107)

The hemodynamic effects of a 20% exchange-transfusion with different solutions of highly purified human hemoglobin A-zero (A0) were evaluated. We compared unmodified hemoglobin with hemoglobin cross-linked with O-raffinose. Unmodified hemoglobin increased systemic vascular resistance and mean arterial pressure more than the O-raffinose cross-linked hemoglobin solution (by approximately 45% and approximately 14%, respectively). Unmodified hemoglobin markedly reduced cardiac output (CO) by approximately 21%, whereas CO was unaffected by the O-raffinose cross-linked hemoglobin solution. Unmodified and O-raffinose cross-linked hemoglobin solutions increased mean arterial pressure to comparable extents ( approximately 14% and approximately 9%, respectively). Unmodified hemoglobin increased renal vascular resistance 2-fold and reduced the glomerular filtration rate by 58%. In marked contrast, the O-raffinose cross-linked hemoglobin had no deleterious effect on the glomerular filtration rate, renal blood flow, or renal vascular resistance. The extents to which unmodified and O-raffinose cross-linked hemoglobin solutions inactivated nitric oxide also were compared using three separate in vitro assays: platelet nitric oxide release, nitric oxide-stimulated platelet cGMP production, and endothelium-derived relaxing factor-mediated inhibition of platelet aggregation. Unmodified hemoglobin inactivated or oxidized nitric oxide to a greater extent than the O-raffinose cross-linked hemoglobin solutions in all three assays. In summary, O-raffinose cross-linking substantially reduced the systemic vasoconstriction and the decrease in CO induced by unmodified hemoglobin and eliminated the deleterious effects of unmodified hemoglobin on renal hemodynamics and function. We hypothesize that O-raffinose cross-linking reduces the degree of oxidation of nitric oxide and that this contributes to the reduced vasoactivity of this modified hemoglobin. (+info)

Septicemia in dialysis patients: incidence, risk factors, and prognosis. (3/3107)

BACKGROUND: Infection is second to cardiovascular disease as a cause of death in patients with end-stage renal disease (ESRD), and septicemia causes a majority of these infectious deaths. To identify patients at high risk and to characterize modifiable risk factors for septicemia, we examined the incidence, risk factors, and prognosis for septicemia in a large, representative group of U.S. dialysis patients. METHODS: We conducted a longitudinal cohort study of incident ESRD patients in the case-mix study of the U.S. Renal Data System with seven years of follow-up from hospitalization and death records. Poisson regression was used to examine independent risk factors for hospital-managed septicemia. Cox proportional hazards analysis was used to assess the independent effect of septicemia on all-cause mortality and on death from septicemia. Separate analyses were performed for patients on peritoneal dialysis (PD) and hemodialysis (HD). RESULTS: Over seven years of follow-up, 11.7% of 4005 HD patients and 9.4% of 913 PD patients had at least one episode of septicemia. Older age and diabetes were independent risk factors for septicemia in all patients. Among HD patients, low serum albumin, temporary vascular access, and dialyzer reuse were also associated with increased risk. Among PD patients, white race and having no health insurance at dialysis initiation were also risk factors. Patients with septicemia had twice the risk of death from any cause and a fivefold to ninefold increased risk of death from septicemia. CONCLUSIONS: Septicemia, which carries a marked increased risk of death, occurs frequently in patients on PD as well as HD. Early referral to a nephrologist, improving nutrition, and avoiding temporary vascular access may decrease the incidence of septicemia. Further study of how race, insurance status, and dialyzer reuse can contribute to the risk of septicemia among ESRD patients is indicated. (+info)

Evaluation of pulmonary volumetric morphometry at the light and electron microscopy level in several species of passerine birds. (4/3107)

The lungs of 3 small passerine species, having similar body mass but different diurnal activity patterns, were analysed morphometrically to assess the relationship between diurnal activity and pulmonary volumetry at the light and electron microscope levels. The percentage volumes of the major lung and exchange tissue components of the 3 species--an aerial insectivore, a foliage gleaner/nectarivore and a ground forager--were strikingly similar, and consistent with literature values for other passerine species. The only significant difference found was exchange tissue plasma volume and pulmonary haematocrit, with the ground-foraging, low activity Malurus splendens having significantly lower values than the other 2 species. This may indicate that cardiovascular parameters are more important determinants of metabolic activity in small passerines than aspects of pulmonary anatomy. (+info)

Hematocrit correlates with blood pressure in young male office workers. (5/3107)

High hematocrit (Ht) level has been reported to be a correlating factor of hypertension in aged people, but has not been examined in younger generation. To investigate the association between Ht and blood pressure (BP) in healthy young workers, statistical analysis was performed for 646 male employees, using cross-sectional health-check data. Ht was positively correlated with systolic blood pressure (SBP) and with diastolic blood pressure (DBP) by Pearson's simple correlation analysis. Multiple regression analysis for SBP and DBP was conducted by stepwise procedure, using Ht, age, body mass index (BMI), and drinking and smoking habits as independent variables. It was revealed that Ht was a significant independent variable for DBP (p < 0.001), as well as age and BMI, but not for SBP. These findings suggest that increased Ht is an important variable for assessing risk for cardiovascular disorders, especially diastolic hypertension, in young male office workers. (+info)

Maintenance of normal agonist-induced endothelium-dependent relaxation in uraemic and hypertensive resistance vessels. (6/3107)

BACKGROUND: The nitric oxide system has been implicated in several diseases with vascular complications including diabetes mellitus and hypertension. Despite the high prevalence of hypertension and cardiovascular complications in renal failure few studies have examined vascular and endothelial function in uraemia. We therefore chose to study possible abnormalities of the nitric oxide vasodilator system in an animal model of chronic renal failure. METHODS: Adult spontaneous hypertensive rats and Wistar Kyoto rats were subjected to a 5/6 nephrectomy with control animals having sham operations. After 4 weeks blood pressure was recorded and the animals were sacrificed. Branches of the mesenteric arteries were isolated and mounted on a Mulvany myograph. All experiments were performed in the presence of indomethacin (10(-5) M). The vessels were first preconstricted with noradrenaline, exposed to increasing concentrations of acetylcholine (10(-8) to 10(-4) M) and subsequently to sodium nitroprusside (10(-5) M). RESULTS: There was no difference in the relaxation of the four groups of vessels to any of the concentrations of acetylcholine used nor was there any significant difference in the EC50s (control Wistar Kyoto 6.1+/-1.4 x 10(-8) M; uraemic Wistar Kyoto 5.4+/-0.8 x 10(-8) M; control spontaneous hypertensive rats 4.5+/-0.6 x 10(-8) M; uraemic spontaneous hypertensive rats 6+/-0.7 x 10(-8) M). Vasodilatation in response to sodium nitroprusside was unchanged in uraemic vessels. In addition the vascular responses to both acetylcholine and sodium nitroprusside were unaltered in spontaneous hypertensive rats. CONCLUSIONS: We conclude that normal agonist-induced endothelium-dependent relaxation is maintained in experimental uraemia and hypertension. (+info)

Mechanism for the posture-specific plasma volume increase after a single intense exercise protocol. (7/3107)

To test the hypothesis that exercise-induced hypervolemia is a posture-dependent process, we measured plasma volume, plasma albumin content, and renal function in seven healthy subjects for 22 h after single upright (Up) or supine (Sup) intense (85% peak oxygen consumption rate) exercise. This posture was maintained for 5 h after exercise. Plasma volume decreased during exercise but returned to control levels by 5 h of recovery in both postures. By 22 h of recovery, plasma volume increased 2.4 +/- 0.8 ml/kg in Up but decreased 2.1 +/- 0.8 ml/kg in Sup. The plasma volume expansion in Up was accompanied by an increase in plasma albumin content (0.11 +/- 0.04 g/kg; P < 0.05). Plasma albumin content was unchanged in Sup. Urine volume and sodium clearance were lower in Up than Sup (P < 0.05) by 5 h of recovery. These data suggest that increased plasma albumin content contributes to the acute phase of exercise-induced hypervolemia. More importantly, the mechanism by which exercise influences the distribution of albumin between extra- and intravascular stores after exercise is altered by posture and is unknown. We speculate that factors associated with postural changes (e.g., central venous pressure) modify the increase in plasma albumin content and the plasma volume expansion after exercise. (+info)

Efficacy of recombinant human Hb by 31P-NMR during isovolemic total exchange transfusion. (8/3107)

The ability of recombinant human Hb (rHb1.1), which is being developed as an oxygen therapeutic, to support metabolism was measured by in vivo 31P-NMR surface coil spectroscopy of the rat abdomen in control animals and in animals subjected to isovolemic exchange transfusion to hematocrit of <3% with human serum albumin or 5 g/dl rHb1.1. No significant changes in metabolite levels were observed in control animals for up to 6 h. The albumin-exchange experiments, however, resulted in a more than eightfold increase in Pi and a 50% drop in phosphocreatine and ATP within 40 min. The tissue pH dropped from 7.4 to 6.8. The decrease in high-energy phosphates obeyed Michaelis-Menten kinetics, with a Michaelis-Menten constant of 3% as the hematocrit at which a 50% drop in high-energy phosphates was observed. Exchange transfusion with rHb1.1 resulted in no significant drop in high-energy phosphates, no rise in Pi, and no change in tissue pH from 7.35 +/- 0.15 for up to 5 h after exchange. By these criteria, rHb1.1 at a plasma Hb concentration of approximately 5 g/dl after total exchange transfusion was able to sustain energy metabolism of gut tissue at levels indistinguishable from control rats with a threefold higher total Hb level in erythrocytes. (+info)

The mnemonic for features of the rule is CHESS: • C - History of congestive heart failure • H - Hematocrit < 30% • E - Abnormal ...

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

Billett, Henny H. (1990). "Hemoglobin and Hematocrit". NCBI Bookshelf. PMID 21250102. Retrieved 2019-05-04. "Hemoglobin test - ...

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

Coating around hematocrit tubes. Insulating material for a cryocooler radiation shield. As a window material to confine gas in ...

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

Hematocrit "Archived copy" (PDF). Archived from the original (PDF) on September 30, 2011. Retrieved July 27, 2011. CS1 maint: ...

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

... hematocrit or hemoglobin levels; general health history; and a diet The WIC program has three roles: to find out about a ...

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

Hematocrit tests can be performed to calculate the proportion of red blood cells in your blood. Higher proportions result in ... "Hematocrit test - Mayo Clinic". www.mayoclinic.org. "Blood Vessels - Encyclopedia.com". www.encyclopedia.com. "How the Heart ...

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

The hematocrit may be elevated. The serum urea and creatine may be raised but this is dependent on the hydration status of the ...

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

... the mean fetal hematocrit is 50%; and at stillbirth, the mean fetal blood volume is 150 m l k g {\displaystyle 150{\frac {ml}{ ...

https://en.wikipedia.org/wiki/Kleihauer–Betke_test

Hematocrit, the proportion of blood volume occupied by red blood cells, is typically about three times the hemoglobin ... "Hematocrit (HCT) or Packed Cell Volume (PCV)". DoctorsLounge.com. Archived from the original on 2008-01-02. Retrieved 2007-12- ... For example, if the hemoglobin is measured at 17 g/dL, that compares with a hematocrit of 51%. Laboratory hemoglobin test ...

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

Equipment used in Awojobi clinic such as the operating table, autoclave, water distiller, pedal suction pump and haematocrit ... Awojobi, Oluyombo A. (2016-06-25). "The Manual Haematocrit Centrifuge". Tropical Doctor. 32 (3): 168. doi:10.1177/ ... 1998 The manual haematocrit centrifuge - Oluyombo A Awojobi, 2002 A review of surgical cases and procedures in rural Nigeria - ...

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

Nevertheless, hematocrit has the strongest impact on whole blood viscosity. One unit increase in hematocrit can cause up to a 4 ... This relationship becomes increasingly sensitive as hematocrit increases. When the hematocrit rises to 60 or 70%, which it ... the average hematocrit of the blood in the tube is less than the hematocrit of the blood in the reservoir feeding the tube is ... The large volume percentage of red blood cells at a normal hematocrit level leaves little room for cell motion and deformation ...

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

... increased hematocrit, which can require venipuncture to treat; and, exacerbation of sleep apnea. Adverse effects may also ...

https://en.wikipedia.org/wiki/Late-onset_hypogonadism

The target hematocrit is usually at least 40. In a study of 135 IUTs performed on 56 fetuses, the mean hematocrit was 25.2 ... The fetal blood sample is drawn and immediately analyzed for hematocrit using an automated analyzer in the operating room or ... Following the transfusion, an additional blood sample is drawn and analyzed to determine the ending hematocrit level. ...

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

Consensus for clinical diagnosis of CMS use laboratory values: haemoglobin in Males ≥ 21 g/dL; Females ≥ 19 g/dL, haematocrit ... CMS is characterised by polycythaemia (with subsequent increased haematocrit) and hypoxaemia; raised blood pressure in the ... Alternatively, bloodletting (phlebotomy) can be performed to lower the haematocrit temporarily; when combined with volume ... as the body adapts to the normal oxygen level near sea-level and the haematocrit normalises. ...

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

It has been validated, even under low hematocrit circumstances. Cerný V, Turek Z, Parízková R (2007). "Orthogonal polarization ... "Validation of OPS imaging for microvascular measurements during isovolumic hemodilution and low hematocrits". Am J Physiol ...

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

Hematic measures Cortisol, plasma glucose, plasma lactate, hematocrit, etc. Tissue measures Indicators of stress in the muscle ... comparison of slaughter methods found that percussive stunning had the best welfare performance as measured by low hematocrit, ...

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

Tauheed S, Shoaib S, Kamal A (1993). "Haematocrit values in ischaemic heart disease". J Pak Med Assoc. 43: 34-5. PMID 8497102 ...

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

... more accurate than hematocrit or peripheral hematocrit measurements. Measurements are taken 5 times at 6-minute intervals so ... Blood volume (BV) can be calculated given the hematocrit (HC; the fraction of blood that is red blood cells) and plasma volume ... Retrieved April 2011 Reynolds, Monica; Plasma and Blood Volume in the Cow Using the T-1824 Hematocrit Method American Journal ... The microhematocrit data along with the I-131 indicator data provide a normalized hematocrit number, ...

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

... limiting the allowed hematocrit level to 50 per cent, was introduced. If a rider returned a value higher than 50 per cent, they ... proposed to the UCI to introduce a test for an athlete's hematocrit level instead, which tested how many red cells were in a ... What's a fair hematocrit limit?". sportsci.org. Sportscience News. Retrieved 16 August 2019. Fotheringham 2017, p. 107. Whittle ...

https://en.wikipedia.org/wiki/1998_Tour_de_France

ESAs increase hematocrit (% of blood volume that is red cell mass) and total red cell mass in the body, providing a good ... In 1997, the Union Cycliste Internationale (UCI) instituted a new rule that riders testing above 50% haematocrit were not only ... What's a fair hematocrit limit?". Sports Science. "Pantani: Future 'in doubt'". BBC. 5 June 1999. Retrieved 30 June 2011. ... pointing out that normally haematocrit levels would start "around 40-42%" and drop during the course of a "grand tour", but ...

https://en.wikipedia.org/wiki/Erythropoiesis-stimulating_agent

A hallmark of polycythemia is an elevated hematocrit, with Hct > 55% seen in 83% of cases. A somatic (non-hereditary) mutation ... Polycythemia (also known as polycythaemia or polyglobulia) is a disease state in which the hematocrit (the volume percentage of ... phlebotomy may also be used on a regular basis to reduce the hematocrit. Myelosuppressive medications such as hydroxyurea are ...

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

Alterations in hematocrit and respiratory rate induced by methylene blue. Proc Soc Exp Biol Med. 1968; 128:93-95. 3. Stossel TP ...

https://en.wikipedia.org/wiki/Thomas_P._Stossel

This resulted in a decrease in haematocrit. Bendich, C. (1953). "A revision of the structural formulation of vicine and its ...

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

The Maxwell-Fricke equation relates the resistivity of blood to hematocrit. This relationship has been shown to hold for humans ... ρ2 is the resistivity of blood cells and φ is the hematocrit. http://zdn.umed.lodz.pl/~biophysics/Module_V_lab53 Geddes, L.A.; ...

https://en.wikipedia.org/wiki/Maxwell–Fricke_equation

The average hematocrit level for birds is between 30 and 45%; however, the Amethyst Sunbird has an average hematocrit level of ... Higher hematocrit levels may be attributed to its small body size and can help with oxygen carrying capacity and the metabolic ... During warmer months, the sunbird's hematocrit levels will increase with higher altitudes (where there is also a dramatic drop ... Lindsay, Claire V.; Downs, Colleen T.; Brown, Mark (2010-10-01). "Seasonal variation in hematocrit levels of Amethyst Sunbirds ...

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

Phlebotomy is typically performed to bring their hematocrit (red blood cell percentage) down below 45 for men or 42 for women. ... Common findings include an elevated hemoglobin level and hematocrit, reflecting the increased number of red blood cells; the ... The removal of blood from the body induces iron deficiency, thereby decreasing the haemoglobin / hematocrit level, and reducing ... and the hematocrit may be as high as 70 to 80%. In addition, the total blood volume sometimes increases to as much as twice ...

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

Reference equations derived from a healthy nonsmoking population and effects of hematocrit". Am Rev Respir Dis. 135 (4): 805-11 ...

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

The precise factor depends on hematocrit as well as amount inside RBCs. Exceptions are mainly those values that denote total ...

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

This results from an increased hematocrit and mean cellular hemoglobin content (MCHC). The erythrocyte content in the blood ...

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

High neonatal hematocrits are particularly likely to confound glucose measurement by meter. Second, unless the specimen is ... The disparity between venous and whole blood concentrations is greater when the hematocrit is high, as in newborn infants, or ... Two other factors significantly affect glucose measurement: hematocrit and delay after blood drawing. ...

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

While known hematocrit levels are used in detecting conditions, it may fail at times due to hematocrit being the measure of ... Calculated hematocrit is determined by multiplying the red cell count by the mean cell volume. The hematocrit is slightly more ... Hematocrit levels also serve as an indicator of health conditions. Thus, tests on hematocrit levels are often carried out in ... Lowered hematocrit levels also pose health impacts. These causes and impacts have been reported: A low hematocrit level is a ...

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

hematocrit (plural hematocrits) (Abbreviated as: Ht or HCT) *(medicine) The percentage (by volume) of packed red blood cells in ... Retrieved from "https://en.wiktionary.org/w/index.php?title=hematocrit&oldid=51739801" ...

https://en.wiktionary.org/wiki/hematocrit

Hematocrit is a blood test that measures how much of a persons blood is made up of red blood cells. This measurement depends ... Hematocrit is a blood test that measures how much of a persons blood is made up of red blood cells. This measurement depends ... H. Hematocrit (Hct) - blood. In: Chernecky CC, Berger BJ, eds. Laboratory Tests and Diagnostic Procedures. 6th ed. St Louis, MO ... The hematocrit is almost always done as part of a complete blood count (CBC). ...

https://medlineplus.gov/ency/article/003646.htm

A hematocrit test is a blood test that can help detect anemia and other blood disorders. Learn more. ... What is a hematocrit test?. A hematocrit test is a type of blood test. Your blood is made up of red blood cells, white blood ... Why do I need a hematocrit test?. Your health care provider may have ordered a hematocrit test as part of your regular checkup ... Is there anything else I need to know about a hematocrit test?. Many factors can affect your hematocrit levels, including a ...

https://medlineplus.gov/labtests/hematocrittest.html

The hematocrit measures the proportion of your blood made up of red blood cells (RBCs). It is used to check for anemia as well ... A hematocrit may be used to:. *Identify and evaluate the severity of anemia (low RBCs, low hemoglobin, low hematocrit) or ... In general, the hematocrit will rise when the number of red blood cells increases and the hematocrit will fall to less than ... Some examples of causes of a high hematocrit include:. *Dehydration-this is the most common cause of a high hematocrit. As the ...

https://labtestsonline.org/tests/hematocrit

2017 American Association for Clinical Chemistry, republished from Lab Tests Online.*. Descriptions of clinical laboratory tests were originally prepared for use on Lab Tests Online, an award-winning patient education website on clinical laboratory testing. Lab Tests Online is produced by the American Association for Clinical Chemistry (AACC), a global scientific and medical professional organization dedicated to clinical laboratory science and its application to healthcare. The Lab Tests Online website is developed in collaboration with other laboratory professional societies and is funded in part through corporate sponsorships.. Please click to see a complete list of the sites collaborating partners or corporate sponsors.. ...

https://www.labcorp.com/help/patient-test-info/hematocrit

Low or high hematocrit levels may signal conditions such as anemia, bone marrow problems, dehydration, and more. Learn the ... Learn about hematocrit (hct) levels in the blood. ... significance of normal, high, and low hematocrit values. ... What does a low hematocrit mean?. A person who has a low hematocrit is referred to as being anemic. There are many reasons for ... What is the hematocrit?. The hematocrit is the proportion, by volume, of the blood that consists of red blood cells. The ...

https://www.medicinenet.com/hematocrit/article.htm

... jbero tds.net Thu, 26 Aug 2010 09:25:49 -0700 ... Felvtalk] update on josie, kitty with low hematocrit MaryChristine. * *Re: [Felvtalk] update on josie, kitty with low hematocr ... but her hematocrit went , from 8 to 12 just with that, shes perky, showing interest in hanging , around. thats all i have now ...

https://www.mail-archive.com/[email protected]/msg41729.html

encoded search term (Hematocrit) and Hematocrit What to Read Next on Medscape. Related Conditions and Diseases. * Hematocrit ... Hematocrit is the fraction of whole blood composed of red blood cells. Hematocrit rises with an increase in the number of red ... Hematocrit may indicate that a patient has anemia, erythrocytosis, or changes in plasma volume. Hematocrit may be used as a ... Causes of decreased hematocrit include, but are not limited to:. * Anemia (eg, iron deficiency anemia, aplastic anemia, lead ...

https://emedicine.medscape.com/article/2054320-overview

The hematocrit test is a blood test used to identify the hematocrit levels. Read more ... Hematocrit (Hct) levels measure the percentage of red blood cells, by volume, in whole blood. ... Hematocrit (Hct) levels measure the percentage of red blood cells, by volume, in whole blood. For example, a hematocrit of 30% ... Hemoglobin, hematocrit and red blood cell count are part of a complete blood count. The three results are related as there are ...

http://www.home-remedies-for-you.com/articles/2015/procedures-surgeries/hematocrit.html

Maintaining patients with polycythemia vera at hematocrit levels below 45% reduced thrombotic complications without increasing ... With median follow-up of 31 months, five patients in the low-hematocrit group and 18 in the high-hematocrit arm had primary- ... The mean levels were 44.4% in the low-hematocrit group and 47.5% in the high-hematocrit arm. ... "Therefore, the hematocrit target described by Marchioli et al. is adequate for men but inadequate for women, who on the basis ...

https://www.medpagetoday.com/meetingcoverage/ashhematology/36335

International Health notes that the normal rule for hematocrit count is three times the hemoglobin count. The hematocrit value ... An article in the journal Tropical Medicine & International Health notes that the normal rule for hematocrit count is three ... Of the two, the hematocrit value requires less specialized equipment and is the quicker option, according to "Clinical Methods ... The hematocrit is the ration of these two numbers multiplied by 100. ...

https://www.reference.com/science/hemoglobin-converted-hematocrit-e74fb7701466b0ce

The word hematocrit means to separate blood. In this test, your red blood cells are separated from the rest of your blood so ... Your hematocrit (HCT) shows whether you have a normal amount of red blood cells, too many, or too few. To measure your HCT, ... Hematocrit. Does this test have other names?. HCT, packed cell volume, PCV ...

https://www.urmc.rochester.edu/encyclopedia/content.aspx?ContentTypeID=167&ContentID=hematocrit

The BioTrend oxygenation saturation and hematocrit system provides real-time information, alerting you immediately to any ... BioTrend Oxygenation Saturation and Hematocrit Monitor. The BioTrend® oxygenation saturation and hematocrit system provides ...

https://www.medtronic.com/us-en/healthcare-professionals/products/cardiovascular/blood-management-diagnostics/biotrend-oxygenation-saturation-and-hematocrit-monitor.html

Micro-hematocrit tubes available in multiple sizes and additives for a wide range of capillary blood collection.,medicine, ... Micro-hematocrit tubes available in multiple sizes and additives for a wide range of capillary blood collection. ...

http://www.bio-medicine.org/medicine-products/Safe-T-Fill-26-23174-3B-Micro-Hematocrit-Tubes-18572-1/

Hemato-clad Hematocrit Tubes combine the precision of glass with the safety provided by a Mylar® overwrap. Now you can give ... Micro-Hematocrit Capillary Tubes. 4. Chase Micro-Hematocrit Capillary Tubes. 5. Hematocrit. 6. CVC 9005 Hematocrit Calibration ... QC 900 Hematocrit Control. 8. Gonochek - II Tubes. 9. SAFE-T-FILL Blood Gas Capillary Tubes Balanced Heparin. 10. SAFE-T-FILL ... Hemato-clad Hematocrit Tubes combine the precision of glass with the safety provided by a Mylar® overwrap. Now you can give ...

http://www.bio-medicine.org/medicine-products/Hemato-Clad-Mylar-26-23174-3B-Wrapped-Hematocrit-Tubes-18571-1/

Hematocrit is then determined by comparing this spectrum to a mathematical model relating optical properties to blood ... The invention provides an optical method and apparatus for non-invasively determining blood hematocrit. The method includes the ... Hematocrit Measuring Devices. FIG. 3 shows an optical hematocrit measuring device 70 for determining blood hematocrit of a ... 2 is a plot of predicted hematocrit as a function of actual hematocrit representative of data generated by the new hematocrit ...

http://www.google.ca/patents/US6006119

A system for determining the hematocrit transcutaneously and noninvasively. Disclosed are a finger clip assembly and an earlobe ... the hematocrit value and the continuous analog hematocrit curve in real time, the hematocrit-independent oxygen saturation ... 3. If the functions ελ versus hematocrit are not sufficiently different, then the ratio εbλ1 /εbλ2 will not hold hematocrit ... The tissue hematocrit value, in contrast with the blood hematocrit value, reflects the amount of red blood cells in a given ...

http://www.freepatentsonline.com/5499627.html

So we would call this the hematocrit, right? So this is moms hematocrit. And this is a very typical number for a pregnant ... About 55%. So here, the hematocrit is much higher. Now what does that mean if the hematocrit is higher in the baby, about 55%? ...

https://www.khanacademy.org/science/health-and-medicine/human-anatomy-and-physiology/introduction-to-hematologic/v/fetal-hemoglobin-and-hematocrit

what is hematocrit?. is the percentage in formed element in a bllod sample. ...

https://www.studystack.com/flashcard-390517

StatSpin CritSpin Micro-Hematocrit Centrifuge M961-22 with Reader S120-22 , Business & Industrial, Healthcare, Lab & Dental, ... StatSpin CritSpin Micro-Hematocrit CS02 rev A Centrifuge with rotors/tray works ...

https://www.ebay.com/itm/StatSpin-CritSpin-Micro-Hematocrit-Centrifuge-M961-22-Reader-S120-22-/183273683107?hash=item2aabf678a3

Normal hematocrit for men is 38.8 to 50 percent. For... ... Normal Hemoglobin and Hematocrit Lab Results * Low Hematocrit ... Hematocrit measures the number of red blood cells in the blood by volume. Low hematocrit is another indicator of anemia, ... Normal hematocrit for men is 38.8 to 50 percent. For women, the normal range is 34.9 to 44.5 percent. These normal values may ... Hemoglobin and hematocrit are commonly tested when a physician orders a complete blood count, or CBC. This laboratory test is ...

https://www.reference.com/health/normal-hemoglobin-hematocrit-range-c17c157d2bf7b09f

Elevated hematocrit levels generally cause heat intolerance, sweating, weight loss, fatigue, and weakness. Many people also ... If a persons hematocrit remains elevated above a certain level for a period of time, he or she may be at high risk of blood ... Elevated hematocrit levels, sometimes referred to as polycythemia or erythrocytosis, can result in a variety of symptoms and ... If the elevated hematocrit levels continue to increase unchecked, a person is at increased risk of blood clots, heart disease, ...

https://www.wisegeek.com/what-are-the-effects-of-elevated-hematocrit-levels.htm

One such measurement is the hematocrit-the ratio of the volume of red blood cells to the total blood volume. A hematocrit value ... Red blood cells applied to the paper travel a distance that is proportional to the hematocrit. Blood with a high hematocrit ... Paper device measures hematocrit. Inexpensive red blood cell assay could be used in limited-resource settings ... The device for measuring hematocrit is made of paper patterned with hydrophobic (black) and hydrophilic (white) regions. The ...

https://cen.acs.org/articles/94/i37/Paper-device-measures-hematocrit.html?h=302702479

Hematocrit measurements under a variety of analyzer pitch angles (0°, ±30°, ±45°, ±60°), spun hematocrit, and an improvised " ... The difference between the highest hematocrit value and the lowest hematocrit value of each sample is included in Table 1 below ... A method of performing a hematocrit analysis, the method comprising: inserting a test device comprising a hematocrit sensor ... the average hematocrit of each pair of analyzers was calculated. The highest and the lowest hematocrit values and the related ...

http://www.freepatentsonline.com/y2014/0172316.html

An improved blood analyzing device is disclosed for measuring the hematocrit and oxygen saturation levels of a quantity of ... 12, a compensated hematocrit level of 29.5% at an inputted pH value of 7.2 corresponded to a normalized hematocrit level of 30 ... Hematocrit measuring apparatus. US4776340 *. 23 Mar 1987. 11 Oct 1988. Spectramed, Inc.. Hematocrit measurement by differential ... A first hematocrit detection fiber 34 and a second hematocrit detection optical fiber 36 are also disposed at locations along ...

http://www.google.com.au/patents/US5249584

92 Mental stress can also increase hematocrit,94 95 and in the present study, hematocrit increased progressively with ... Effect of Circulating Epinephrine on Platelet Function and Hematocrit. Sverre E. Kjeldsen, Alan B. Weder, Brent Egan, Richard ... Hematocrit was determined in these blood samples before plasmas were spun off by the microhematocrit method using heparinized ... Effect of Circulating Epinephrine on Platelet Function and Hematocrit. Sverre E. Kjeldsen, Alan B. Weder, Brent Egan, Richard ...

http://hyper.ahajournals.org/content/25/5/1096.full

Using an experimental model of elevated hematocrit in healthy mice, we measured effects of hematocrit in two in vivo clot ... Elevated hematocrit enhances platelet accumulation following vascular injury. Bethany L. Walton, Marcus Lehmann, Tyler ... Elevated hematocrit enhances platelet accumulation following vascular injury. Bethany L. Walton, Marcus Lehmann, Tyler ... Elevated hematocrit enhances platelet accumulation following vascular injury. Bethany L. Walton, Marcus Lehmann, Tyler ...

http://www.bloodjournal.org/content/early/2017/03/01/blood-2016-10-746479?sso-checked=true

The word hematocrit means to separate. In this test, your red blood cells are separated from the rest of your blood so they can ... Your hematocrit (HCT) shows whether you have a normal amount of red blood cells, too many, or too few. To measure your HCT, ... You may also need your hematocrit checked before having surgery or if your healthcare provider suspects you have a red blood ... Hematocrit. Does this test have other names?. HCT, packed cell volume, PCV ...

http://www.ahealthyme.com/Library/DiseasesConditions/Adult/Endocrinology/167,hematocrit

In this research we evaluated the effect of hematocrit on increasing viscosity, and possible related changes … ... Effect of hematocrit on blood pressure via hyperviscosity Am J Hypertens. 1999 Jul;12(7):739-43. doi: 10.1016/s0895-7061(99) ... It was observed that in the range of 60.16% and 25.32%, a 10.99% increase of hematocrit produced an increase of 1 unit relative ... The resultant hematocrit and viscosity changes were measured. Viscosity measurement was performed by capillary viscometer. The ...

https://pubmed.ncbi.nlm.nih.gov/10411372/?dopt=Abstract

Hematocrit levels that are too high or too low can indicate a blood disorder , dehydration , or other medical conditions. (medlineplus.gov)
Dehydration, the most common cause of high hematocrit levels. (medlineplus.gov)
Dehydration produces a falsely high hematocrit that disappears when the proper fluid balance is restored. (medicinenet.com)
Severe dehydration can lower blood volumes creating an artificially high hematocrit reading. (home-remedies-for-you.com)
Genetic conditions, dehydration, low oxygen availability and over-production of red blood cells can cause elevated hematocrit, states eMedicineHealth.com. (reference.com)
A hematocrit value above normal is a sign of dehydration, whereas a value below normal can mean anemia. (acs.org)
Smoking, a polluted environment or dehydration also increases red blood cell count and hematocrit. (uniprix.com)
Dehydration concentrates the blood, increasing the hematocrit. (thefreedictionary.com)

Your health care provider may have ordered a hematocrit test as part of your regular checkup or if you have symptoms of a red blood cell disorder, such as anemia or polycythemia vera. (medlineplus.gov)
The hematocrit is a fairly quick and simple way of evaluating your red blood cells and checking for conditions such as anemia . (labtestsonline.org)
An abnormally low hematocrit may suggest anemia, a decrease in the total amount of red blood cells, while an abnormally high hematocrit is called polycythemia. (wikipedia.org)
Hematocrit may indicate that a patient has anemia, erythrocytosis, or changes in plasma volume. (medscape.com)
Low hematocrit is another indicator of anemia, according to eMedicineHealth.com. (reference.com)
Another term for low hematocrit is anemia. (emedicinehealth.com)
The hematocrit is usually done on a person with symptoms of anemia. (thefreedictionary.com)
Treatment for anemia ( low hemoglobin/hematocrit) has to be directed to the underlying cause/etiology of the anemia. (healthtap.com)
Decreased hematocrit levels or hemoglobin may indicate anemia such as iron deficiency anemia. (tandurust.com)
The treatment of preoperative anemia is based on guidelines made by the American College of Cardiology (ACC), which recommends packed red blood cell transfusion when hematocrit is less than 21% in patients without cardiovascular disease and 24% in patients with cardiovascular disease. (physiciansweekly.com)
BACKGROUND: Blood transfusion is used to treat acute anemia with the goal of increasing blood oxygen-carrying capacity as determined by hematocrit (Hct) and oxygen delivery (DO2). (uzh.ch)
Anemia is diagnosed by measuring hemoglobin (Hb) levels (g / L) and hematocrit (Hct) (percentage of red blood cells in the blood) and by comparison with a given reference values. (edu.ba)
The Relation of Erythropoietin Towards Hemoglobin and Hematocrit in Varying Degrees of Renal Insufficiency of the value of glomerular filtration rate the incidence of anemia is increased. (edu.ba)

The hematocrit can also be determined by a manual method using a centrifuge. (medicinenet.com)
Another way of measuring hematocrit is to use a centrifuge. (home-remedies-for-you.com)
The GCH-24 Hematocrit Centrifuge allows your lab to determine erythrocyte fractions in blood as well as micro solution separations using the included twenty-four (24) place capillary rotor. (thomassci.com)
The DM4124 Hematocrit Centrifuge with AC24P rotor is used for determination of volume fractions of erythrocytes in blood and also for separation of micro blood and solutions. (thomassci.com)
All common microtubes (0.2ml, 0.5ml, 1.5ml, 2.0ml) can be accepted as well as PCR strips, hematocrit tubes, and even 5.0ml centrifuge tubes. (thomassci.com)
A rugged, simple and reliable Micro Haematocrit Centrifuge whose classic design has stood the test of time. (proscitech.com.au)

Hemoglobin and hematocrit levels depend on the volume of blood and the readings can get skewed if the patient is severely dehydrated or is overloaded with fluids. (home-remedies-for-you.com)
What Is the Normal Hemoglobin and Hematocrit Range? (reference.com)
Hemoglobin and hematocrit are commonly tested when a physician orders a complete blood count, or CBC. (reference.com)
What could cause low red blood cell count, but normal hemoglobin and hematocrit levels? (healthtap.com)
We rely more on hemoglobin and hematocrit levels than or red cell counts. (healthtap.com)
The aim of this study was to establish a quantitative relationship between the concentration of erythropoietin, hemoglobin and hematocrit in different values of renal insufficiency. (edu.ba)

In silico , direct numerical simulations of whole blood predicted elevated hematocrit increases the frequency and duration of interactions between platelets and a thrombus. (bloodjournal.org)
The complete blood count is a numerical listing of the hematocrit, as well as the hemoglobin concentration, and the three blood cell lines produced by the bone marrow (the red blood cells, the white blood cells, and the platelets). (emedicinehealth.com)
Here we present experimental and theoretical results showing that the adhesion probability of platelets to von Willebrand factor is strongly and nonlinearly dependent on hematocrit and flow rate. (mit.edu)
Using hydrodynamic simulations of a simple model, we explicitly show that the higher the hematocrit and the flow rate, the larger the amount of platelets residing close to the wall. (mit.edu)

Whole Body Hematocrit in Women with Idiopathic Edema: Evidence of an Abnormal Plasma Distribution. (annals.org)
Absolute blood volumes (ABV) were initially derived for each PV icg estimate, and corresponding measured systemic hematocrit was adjusted by a factor of 0.86 to correct for the difference between the systemic and whole-body hematocrit (constant Fcell ratio). (asnjournals.org)
Accurate measurements of red cell volume by radioactive isotopes show that the relative volumes of red cells and plasma in the circulation as a whole (whole-body hematocrit [Hct w ]) differ from those found in the venous blood (Hct sys ). (asnjournals.org)

Projected hematocrit level was ±2.5% of actual but deteriorated at higher and lower hematocrit level values. (ovid.com)

citation needed] Another way of measuring hematocrit levels is by optical methods such as spectrophotometry. (wikipedia.org)

Predictive variables included preoperative hematocrit level, patient weight, estimated blood loss, intraoperative crystalloid volume, preoperative platelet count, and hysterectomy route that predicted postoperative day 1 hematocrit level at ±5% for 100% of patients who used an internal validation set. (ovid.com)

For rapid and safe sealing of micro-haematocrit capillaries. (reagecon.com)

An estimated hematocrit as a percentage may be derived by tripling the hemoglobin concentration in g/dL and dropping the units. (wikipedia.org)
While known hematocrit levels are used in detecting conditions, it may fail at times due to hematocrit being the measure of concentration of red blood cells through volume in a blood sample. (wikipedia.org)
Hematocrit levels basically measure the number or concentration of red blood cells in the bloodstream. (wisegeek.com)
Abstract We investigated the effect of raising arterial plasma epinephrine within the lower pathophysiological concentration range on various indicators of blood platelet function and hematocrit. (ahajournals.org)
and annunciating the hematocrit-corrected analyte concentration. (google.com)
Why are the hematocrit and blood concentration levels lower in women than in men? (healthtap.com)
We have generated a transgenic mouse line that reaches a hematocrit concentration of 0.85 due to constitutive overexpression of human erythropoietin in an oxygen-independent manner. (uzh.ch)
Anaemia is assessed either by measurement of the haematocrit or the haemoglobin concentration. (www.gov.uk)
Technological advances have allowed the development of devices that can continuously and noninvasively monitor biologic constituents (hematocrit [Hct] and plasma protein concentration) during hemodialysis (HD) treatment. (asnjournals.org)

Many factors can affect your hematocrit levels, including a recent blood transfusion, pregnancy , or living at a high altitude. (medlineplus.gov)
Higher than normal hematocrit levels represent abnormally elevated red blood cell counts. (medicinenet.com)
Through differential spectrophotometry, the differences in optical densities of a blood sample flowing through small-bore glass tubes at isosbestic wavelengths for deoxyhemoglobin and oxyhemoglobin and the product of the luminal diameter and hematocrit create a linear relationship that is used to measure hematocrit levels. (wikipedia.org)
Optimal hematocrit levels have been studied through combinations of assays on blood sample's hematocrit itself, viscosity, and hemoglobin level. (wikipedia.org)
Hematocrit levels also serve as an indicator of health conditions. (wikipedia.org)
Thus, tests on hematocrit levels are often carried out in the process of diagnosis of such conditions, and may be conducted prior to surgery. (wikipedia.org)
Additionally, the health conditions associated with certain hematocrit levels are the same as ones associated with certain hemoglobin levels. (wikipedia.org)
Hematocrit (Hct) levels measure the percentage of red blood cells, by volume, in whole blood. (home-remedies-for-you.com)
Hematocrit and other levels are measured in automated machines that make several measurements simultaneously. (home-remedies-for-you.com)
Heavy smokers generally have higher levels of hematocrit. (home-remedies-for-you.com)
Abuse of drug erythropoietin (Epogen) can cause high hematocrit levels. (home-remedies-for-you.com)
Your diet can play a big role in the treatment of both low and high hematocrit levels. (home-remedies-for-you.com)
If you suffer from any condition where your hematocrit levels are high then you should minimize if not exclude iron rich foods from your diet. (home-remedies-for-you.com)
ATLANTA -- Maintaining patients with polycythemia vera at hematocrit levels below 45% reduced thrombotic complications without increasing rates of other serious adverse events compared with a higher hematocrit target, researchers said here. (medpagetoday.com)
What Are the Effects of Elevated Hematocrit Levels? (wisegeek.com)
Elevated hematocrit levels, sometimes referred to as polycythemia or erythrocytosis, can result in a variety of symptoms and effects. (wisegeek.com)
When a person has elevated hematocrit levels, he or she might also notice blood in the stool. (wisegeek.com)
If the elevated hematocrit levels continue to increase unchecked, a person is at increased risk of blood clots, heart disease, and stroke. (wisegeek.com)
It is important, then, if a person has elevated hematocrit levels, the cause is determined and corrected as soon as possible. (wisegeek.com)
An improved blood analyzing device is disclosed for measuring the hematocrit and oxygen saturation levels of a quantity of blood. (google.com.au)
The present invention relates generally to systems used for measuring properties of materials in suspension in fluids, and more particularly to a portable apparatus for measuring hematocrit and oxygen saturation levels of a quantity of blood. (google.com.au)
As is well known in the medical profession, both the hematocrit and oxygen saturation levels of blood can he measured optically. (google.com.au)
Most people are not treated with medications or procedures if the hematocrit is only slightly above or below the normal levels. (emedicinehealth.com)
The Swenson model was developed as a linear regression model to estimate postoperative day 1 hematocrit levels after benign hysterectomy. (ovid.com)
For example, hematocrit levels are often a poor indicator of acute blood loss. (physiciansweekly.com)
Whether higher hematocrit levels could increase the incidence of stroke has always been full of controversy. (dovepress.com)
In Cox regression models adjusted for demographic information and for clinical variables, there was a significant association between baseline hematocrit levels and the incidence of stroke. (dovepress.com)
Higher hematocrit levels are associated with a higher incidence of stroke in the Chinese population. (dovepress.com)
Has anybody used naringin to try and lower theyre hematocrit levels? (professionalmuscle.com)
Many studies have shown that hematocrit (HCT) levels are associated with cerebrovascular disease, cardiovascular disease (CVD), peripheral vascular disease, as well as all-cause mortality. (clinicalconnection.com)
My recent blood test showed , ESR and RDW levels slightly high, and hematocrit level decreased slightly. (healthtap.com)
How to Raise Hematocrit levels? (roadbikereview.com)
While retinal vasodilation and hemorrhage can follow acutely after ascent to high altitude, healthy residents at high altitude do not display such characteristics, presumably because high hematocrit levels and other physiological characteristics have adjusted to hypobaric hypoxia. (arvojournals.org)
It sheds new light on the correlation between hematocrit and the initial steps in hemostasis and thrombosis, and outlines advances for the treatment of vascular diseases associated with high levels of red blood cells. (mit.edu)
On average, haematocrit/3 levels were slightly higher than haemoglobin measurements with a mean difference (± SD) of -0.69 (± 1.3) for children under the age of 5 (n = 1,440 measurements from 449 patients). (www.gov.uk)

A high hematocrit, hemoglobin and red blood cell count (erythrocytosis) on the other hand may be caused by medical conditions such as lung diseases, tumors or cardiac disease. (home-remedies-for-you.com)
Haematocrit is reduced in anaemia, increased in erythrocytosis. (edu.au)
For patients N89 and B164 (who had only low serum erythropoietin and were thus classified as having idiopathic erythrocytosis , a very high hematocrit, the presence of JAK2V 617F and the absence of a cause of secondary erythrocytosis led to the diagnosis of PV. (haematologica.org)

For an adult male, the normal level of hematocrit ranges from 38.8 to 50 percent and for an adult female it ranges from 34.9 to 44.5 percent. (home-remedies-for-you.com)
Normal hematocrit for men is 38.8 to 50 percent. (reference.com)

Micro-hematocrit tubes available in multiple sizes and additives for a wide range of capillary blood collection. (bio-medicine.org)
Hemato-clad Hematocrit Tubes combine the precision of glass with the safety provided by a Mylar® overwrap. (bio-medicine.org)
Special high-capacity rotors support 0.5 mL microtubes, 0.2 mL PCR tubes and hematocrit capillary tubes. (thomassci.com)
75mm SafeCrit Sodium Heparin - 100/pk - SafeCrit Hematocrit Tubes - Hematology - Hematocrit Supplies : Flexible plastic performs as well as glass. (egeneralmedical.com)
Spin 12 special 40mm hematocrit tubes in the flat12-place flat hematocrit rotor. (lwscientific.com)

Most of these machines in fact do not directly measure the hematocrit, but instead calculate it based on the determination of the amount of hemoglobin and the average volume of the red blood cells. (medicinenet.com)
Low and high-frequency measuring electrode pairs (26a/26b and 28a/28b) are disposed substan-tially at the same position in the blood flow direction in the blood flow passage (10) thereby enabling the hema-tocrit measuring instrument to measure the hematocrit value without being influenced due to temperature variations of the blood. (google.com)

Acute changes in haematocrit leading to polycythae. (who.int)

It was observed that in the range of 60.16% and 25.32%, a 10.99% increase of hematocrit produced an increase of 1 unit relative viscosity, which means approximately a 20% increase in blood viscosity for a healthy individual. (nih.gov)

Hematocrit may be used as a cutoff to determine transfusion requirements. (medscape.com)
Transfusion decisions are based on the results of laboratory tests, including hematocrit. (thefreedictionary.com)
Transfusion is not considered if the hematocrit level is reasonable. (thefreedictionary.com)
Correlation of transfusion volume to change in hematocrit. (semanticscholar.org)
Hematocrit as a predictor of preoperative transfusion-associated complications in spine surgery: A NSQIP study. (physiciansweekly.com)
In patients with a hematocrit higher than 20%, pRBC transfusion was associated with longer lengths of stay, and higher rates of ventilator dependency greater than 48 h, pneumonia, and 30-day mortality. (physiciansweekly.com)

Because the purpose of red blood cells is to transfer oxygen from the lungs to body tissues, a blood sample's hematocrit-the red blood cell volume percentage-can become a point of reference of its capability of delivering oxygen. (wikipedia.org)
clarification needed] Typically, a higher hematocrit level signifies the blood sample's ability to transport oxygen, which has led to reports that an "optimal hematocrit level" may exist. (wikipedia.org)
If a fourth wavelength of light is used which is extinguished substantially differently by oxyhemoglobin and reduced hemoglobin and which is not substantially extinguished by plasma, then the blood oxygen saturation value, independent of hematocrit, may be determined. (freepatentsonline.com)
In these devices and others used to perform such operations, the oxygen saturation level and the hematocrit level are obtained by measuring the amount of scattering of light of various wavelengths which occurs within a quantity of blood. (google.com.au)
Also, with regard to both oxygen saturation and hematocrit measurements, the accuracy of these measurements is further affected by the presence of proteins and the pH level of the blood. (google.com.au)
Effects of normalization of hematocrit on cerebral blood flow and oxygen metabolism were investigated by positron emission tomography. (asnjournals.org)
The results showed that oxygen supply to the brain tissue increased with normalization of hematocrit, but it was accompanied by increased oxygen extraction in the brain tissue. (asnjournals.org)
In this study, the effects of normalization of hematocrit (Hct) and the related change in blood rheology on the brain circulation and oxygen metabolism were investigated by the positron emission tomography (PET) technique. (asnjournals.org)

A decrease in the number or size of red cells also decreases the amount of space they occupy, resulting in a lower hematocrit. (thefreedictionary.com)

6 , 7 However, these studies had no criterion standard comparison, and to determine SvO 2 , they required exact knowledge of the local hematocrit level. (ajnr.org)

What does a high hematocrit mean? (medicinenet.com)
High hematocrits can be seen in people living at high altitudes and in chronic smokers . (medicinenet.com)
That is, if packed red cells are being supplied, the sample will contain a large amount of those cells and the hematocrit will be artificially very high. (wikipedia.org)
Relative to patients managed with a target hematocrit level of 45% to 50% in a randomized trial, those with lower targets had significantly lower rates of a composite outcome that included cardiovascular death and other major thrombotic events (hazard ratio for high versus low hematocrit 3.91, 95% CI 1.45 to 10.53, P =0.007), reported Roberto Marchioli, MD, of the Consorzio Mario Negri Sud in Santa Maria Imbaro, Italy, and colleagues. (medpagetoday.com)
With median follow-up of 31 months, five patients in the low-hematocrit group and 18 in the high-hematocrit arm had primary-endpoint events. (medpagetoday.com)
If a person's hematocrit remains elevated above a certain level for a period of time, he or she may be at high risk of blood clots , heart disease, or stroke. (wisegeek.com)
Blood with a high hematocrit travels only a short distance, whereas blood with a low hematocrit travels much farther. (acs.org)
Compared to controls, mice with elevated hematocrit (RBC HIGH ) formed thrombi at a faster rate and had a shortened vessel occlusion time. (bloodjournal.org)
A low hematocrit means the percentage of red blood cells is below the lower limits of normal (see above) for that person's age, sex, or specific condition (for example, pregnancy or high-altitude living). (emedicinehealth.com)
How Is a Low or High Hematocrit Treated? (emedicinehealth.com)
The treatment of high or low hematocrit depends on the underlying cause(s), the hematocrit level, and the overall health status of the individual. (emedicinehealth.com)
Some patients with very high hematocrits due to diseases, such as polycythemia rubra vera, may require blood letting (blood removal). (emedicinehealth.com)
Diagnosis and Treatment of Patients with High Hematocrit. (annals.org)
A hematocrit measuring instrument for measuring a va-lue of the hematocrit based on impedances of blood includes a low-frequency impedance measuring device (20) for measu-ring a low-frequency impedance of the blood and a high-fre-quency impedance measuring device (30) for measuring a high-frequency impedance of the blood. (google.com)
The hematocrit value is calculated based on the measured low and high-frequency impedances of the blood. (google.com)
Could you tell me what are leads to for high hematocrits? (healthtap.com)
I have a slightly high hematocrit level and a high MCV level. (healthtap.com)
Blood work one month ago also showed high hematocrit with high WBC but normal mcv. (healthtap.com)
The point is that if you stay hydrated, chances are that you won t be having issues with high hematocrit. (steroid.com)
The predictive values of common biological criteria for the diagnosis of polycythemia vera were studied in a cohort of patients with high hematocrit. (haematologica.org)
These results show that in blood samples of low hematocrit both the kinetics of erythrocyte aggregation and sedimentation process are different from those of the blood with normal and high hematocrit. (spie.org)

Red blood cell count and hematocrit results cannot be interpreted by themselves. (uniprix.com)
Results Standardization of tacrolimus whole blood concentrations to a hematocrit value of 45 % improved the model fit significantly (p (uio.no)
The only informative test results I have thus far are that my hematocrit ranges between 50 and 52, my rbc ranges between 5.9 and 6.2 MIL/UH, My MCH (27.1 ) and MCHC (33) are always just below normal and my recent B12 test was Low (178). (doctorslounge.com)
A week ago on Monday I had blood work done and results showed a Hematocrit of 56% (five weeks into cycle). (steroid.com)
Results: A good fit was obtained using Haematocrit = 5.62 + 2.60 * Haemoglobin. (www.gov.uk)

It does not account for the mass of the red blood cells, and thus the changes in mass can alter a hematocrit level or go undetected while affecting a subject's condition. (wikipedia.org)
When the hematocrit level rises above these percentages, and especially if it rises above 60 percent, the blood can become thicker. (wisegeek.com)
The distance traveled by a blood sample applied to the device correlates to the hematocrit level. (acs.org)
Consequently, it is best to have a doctor explain the significance of an individual's level of hematocrit if it is not normal. (emedicinehealth.com)
Hematocrit is function of the number, volume and blood level of erythrocytes. (uniprix.com)
Predicted postoperative day 1 hematocrit level was calculated with the use of the Swenson equation and compared with measured hematocrit values. (ovid.com)
We then restricted our analysis to those with actual postoperative day 1 hematocrit level of ≤30%, to determine whether the model performed accurately in this subgroup that may need intervention. (ovid.com)
38%. This stratification allowed us to assess the differential accuracy of the Swenson model across hematocrit level ranges. (ovid.com)
Of 602 hysterectomies, 478 patients had all the variables that were needed for the Swenson model and postoperative day 1 hematocrit level for comparison. (ovid.com)
The Swenson model was significantly less accurate in our data compared with their validation set with fewer patients whose predicted hematocrit level was accurate at different thresholds from ±1% through ±5% of actual hematocrit level (all P (ovid.com)
In this subset, the Swenson equation was more likely to overestimate hematocrit level and give false reassurance. (ovid.com)
Although the Swenson model was reliable for the prediction of postoperative day 1 hematocrit level in their internal validation set, it did not perform as well in our hysterectomy population. (ovid.com)
Further research is needed to create a model for the prediction of postoperative day 1 hematocrit level that can be incorporated into standard practice. (ovid.com)
What's your hematocrit level and what's your dose. (professionalmuscle.com)
Available MR imaging methods are limited by sensitivity to flow and often require assumptions of the hematocrit level. (ajnr.org)
When confronted with a patient with low Hb or hematocrit, what is the next level of hematological assessment? (healthtap.com)
What is a normal iron/hematocrit level for an 18 month old? (healthtap.com)
My Hematocrit level was 44.8 and my MCV level was 99. (easy-immune-health.com)
Although a 16% reduction in hematocrit occurred between days 2 and 72 after arrival at sea level, the only significant excursion observed was that the diameter of the veins was larger at day 23 than at days 2 and 72. (arvojournals.org)
The study suggests that an increased haematocrit level plays a part in the development of major ischaemic heart disease events. (bmj.com)

With modern lab equipment, the hematocrit can be calculated by an automated analyzer or directly measured, depending on the analyzer manufacturer. (wikipedia.org)

The Relationship to Serum Cholesterol, Triglycerides, and Hematocrit to the Thrombosis of Human Blood in Vitro. (annals.org)
In this work, a new lab-on-a-chip for rapid analysis of low volume blood samples was designed, fabricated and demonstrated for integration of serum separation, hematocrit evaluation, and protein quantitation. (rsc.org)
There is a correlation between both serum hemoglobin (HGB) and hematocrit (HCT) and attenuation values of vessels in noncontrast-enhanced computed tomography (NECT), which could influence calculated perfusion maps in CT perfusion. (ovid.com)
EPO, hemoglobin, hematocrit, serum creatinine and additional parameters iron, vitamin B12, and folic acid were determined by using immunochemical and spectrophotometric methods and glomerular filtration rate (GFR) was calculated as well. (edu.ba)

The hematocrit is a ratio of the volume of red blood cells to the volume of all these components together, called whole blood. (labtestsonline.org)
The hematocrit is the proportion, by volume, of the blood that consists of red blood cells . (medicinenet.com)
The hematocrit (/hɪˈmætəkrɪt/) (Ht or HCT), also known by several other names, is the volume percentage (vol%) of red blood cells (RBC) in blood, measured as part of a blood test. (wikipedia.org)
There are other names for the hematocrit, such as packed cell volume (PCV), volume of packed red cells (VPRC), or erythrocyte volume fraction (EVF). (wikipedia.org)
Calculated hematocrit is determined by multiplying the red cell count by the mean cell volume. (wikipedia.org)
Hematocrit rises with an increase in the number of red blood cells or a decrease in the plasma volume. (medscape.com)
Conversely, hematocrit decreases when plasma volume increases or in states of decreased erythropoiesis or increased red cell destruction or loss. (medscape.com)
Hematocrit measures the number of red blood cells in the blood by volume. (reference.com)
One such measurement is the hematocrit-the ratio of the volume of red blood cells to the total blood volume. (acs.org)
The hematocrit test indicates the percentage of blood by volume that is composed of red blood cells. (emedicinehealth.com)
The height of the red cell column divided by the height of the total fluid in the capillary tube equals the hematocrit (percentage of RBC's in the total blood volume). (emedicinehealth.com)
Hematocrit corresponds to the ratio of the percentage of the blood volume occupied by red blood cells in total blood volume. (uniprix.com)
In order to test this rationale, the purpose of this meta-analysis was to quantify the effects of glycerol hyperhydration on plasma volume, haemoglobin, and haematocrit in comparison to administration of fluid only. (nih.gov)
Following a literature search, a total of seven studies was included and meta-analyses were performed separately for the effects on plasma volume (5 studies, total n = 54) and on haemoglobin (6 studies, n = 52) and haematocrit (6 studies, n = 52). (nih.gov)
A normal hematocrit test result for males is about 45% (38-50%) of blood volume. (getbodysmart.com)
Fluid volume in the blood affects the hematocrit. (thefreedictionary.com)
Hematocrit is the proportion of blood volume made up by red blood cells. (healthtap.com)
Throughout this review, an overview is provided on new strategies that try to cope with this hematocrit effect (going from avoiding to minimizing), on methods estimating a DBS volume, and on methods estimating or measuring the hematocrit of a DBS. (ugent.be)
Primary hemostasis and blood clotting is known to be influenced by the red blood cell volume fraction (hematocrit) in blood. (mit.edu)
Hematocrit of circulating blood indicates not only a fraction of red blood cell volume to total blood volume but also dynamic changes in circulating blood volume. (nii.ac.jp)
The measurement of relative blood volume (RBV) changes during ultrafiltration assume a constant mass and distribution of circulating blood components such as hematocrit. (asnjournals.org)
The authors examine the validity of this assumption in 10 subjects undergoing repeated direct measurements of systemic hematocrit and plasma volume (PV icg ) using indocyanine green dilution at four stages of dialysis with intermittent ultrafiltration. (asnjournals.org)
This may result in underestimation of changes in systemic hematocrit and RBV during dialysis such that they were less than those predicted by directly measured changes in plasma volume. (asnjournals.org)

Change in hematocrit during trauma assessment predicts bleeding even with ongoing fluid resuscitation. (medscape.com)
Mathematical manipulation of the detected values compensates for the effects of body tissue and fluid and determines the hematocrit value. (freepatentsonline.com)
Bleeding, nutritional deficiencies, fluid overload, destruction of red blood cells and decreased production of red blood cells can cause low hematocrit. (reference.com)
Pregnant women have extra fluid, which dilutes the blood, decreasing the hematocrit. (thefreedictionary.com)

article{8604875, abstract = {Hematocrit-related issues remain a major barrier for (regulatory) acceptance of the classical dried blood spot (DBS) analysis in the bioanalytical and clinical field. (ugent.be)

A bioanalysis method to quantify GSKA using volumetric absorptive microsampling (VAMS) was developed and hematocrit (HCT) related assay bias was investigated. (unboundmedicine.com)

What is a normal hematocrit ranges by ages? (medicinenet.com)
The normal ranges for hematocrit are depended on the age and, after adolescence, the sex of the individual. (medicinenet.com)

Using a multivariable Cox proportional hazards analysis, we examined the association between baseline hematocrit values and the incidence of stroke in the Kailuan cohort (93,299 participants). (dovepress.com)
Because this hypothesis has been controversial ( 4 ), we sought to elucidate the relationship between full-scale intelligence quotient, MR imaging, and hematocrit in a cohort of patients with hemoglobin SS sickle cell disease, the most severe form of sickle cell disease. (ajnr.org)

In this research we evaluated the effect of hematocrit on increasing viscosity, and possible related changes in blood pressure, flow rate, and the equivalent physiologic compensation ratios. (nih.gov)
The resultant hematocrit and viscosity changes were measured. (nih.gov)
In patients with hematocrit of 60% or above the A blood viscosity is increased, and the tissue oxygenation is compromised. (annals.org)

Hematocrit is a blood test that measures how much of a person's blood is made up of red blood cells. (medlineplus.gov)
What is a hematocrit test? (medlineplus.gov)
A hematocrit test is a type of blood test. (medlineplus.gov)
A hematocrit test is often part of a complete blood count (CBC), a routine test that measures different components of your blood. (medlineplus.gov)
Why do I need a hematocrit test? (medlineplus.gov)
What happens during a hematocrit test? (medlineplus.gov)
You don't need any special preparations for a hematocrit test. (medlineplus.gov)
There is very little risk to having a hematocrit test or other type of blood test. (medlineplus.gov)
Is there anything else I need to know about a hematocrit test? (medlineplus.gov)
and at least one of: (i) provide an alert prompting a user to take corrective action during the test cycle, (ii) correct a result of the hematocrit analysis, and/or (iii) suppress the result of the hematocrit analysis, when the determined spatial orientation exceeds the threshold operating spatial plane. (freepatentsonline.com)
5. The system of claim 1, wherein the computing device is further configured to provide the alert prompting the user to take the corrective action during the test cycle, and suppress the result of the hematocrit analysis, when the determined spatial orientation exceeds the threshold operating spatial plane. (freepatentsonline.com)
The hematocrit blood test determines the percentage of red blood cells (RBC's) in the blood. (emedicinehealth.com)
The hematocrit is a basic test that can tell a physician a lot about a person's health. (emedicinehealth.com)
Normal values for the hematocrit test vary according to age, sex, pregnancy , altitude where people live, and even vary slightly between various testing methods. (emedicinehealth.com)
The hematocrit test determines the percentage of whole blood that is made up of red blood cells (RBCs). (getbodysmart.com)
The hematocrit test can also be done on an automated instrument as part of a complete blood count. (thefreedictionary.com)
We test a hypothesis that cognitive impairment in children with hemoglobin SS sickle cell disease is associated with low hematocrit and MR imaging abnormalities. (ajnr.org)
Wechsler test scores were then evaluated in relation to imaging findings and hematocrit values. (ajnr.org)
[UKPRwire, Tue Aug 13 2019] This report studies the current as well as future prospects of the global Hematocrit Test Devices Market . (ukprwire.com)
Stakeholders of this report include companies and intermediaries engaged in the manufacture, commercialization, and provision of hematocrit test devices and new players planning to enter the market. (ukprwire.com)
The section also provides information and data analysis of the global hematocrit test devices market in terms of product, end-user, and region. (ukprwire.com)
The global hematocrit test devices market has been segmented based on product, end-user and region. (ukprwire.com)
In terms of product, the global market has been classified into blood analyzers, hematocrit test meter, and others. (ukprwire.com)
Based on end-user, the global hematocrit test devices market has been segmented into hospitals & ambulatory surgical centers, clinics, diagnostic & pathology labs, and others. (ukprwire.com)
The hospitals & ambulatory surgical centers segment is expected to dominate the global hematocrit test devices market during the forecast period. (ukprwire.com)
Bottom-up approach has been employed for determining the size of the global hematocrit test devices market, using various market indicators obtained from secondary sources, which include analysis of launched products and mapping of sale of hematocrit test devices of top market players in specific regions. (ukprwire.com)
The overview section of the report explores market dynamics such as drivers, restraints, opportunities, and key trends that have significant impact on the global hematocrit test devices market and may influence it in the near future. (ukprwire.com)
These analyses are likely to help market players take strategic decisions to strengthen their positions and grow their share in the global hematocrit test devices market. (ukprwire.com)
In terms of region, the global hematocrit test devices market has been segmented into North America, Europe, Asia Pacific, Latin America, and Middle East & Africa. (ukprwire.com)

Normal range for hematocrit is different between the sexes and is approximately 45% to 52% for men and 37% to 48% for women. (medicinenet.com)
It is important to bear in mind that readings for hematocrit, hemoglobin and red blood cell count, if marginally out of normal range, may not be significant especially if you are healthy and have no signs of any illness. (home-remedies-for-you.com)
An article in the journal Tropical Medicine & International Health notes that the normal rule for hematocrit count is three times the hemoglobin count. (reference.com)
Your hematocrit (HCT) shows whether you have a normal amount of red blood cells, too many, or too few. (rochester.edu)
Maintaining a normal hematocrit may reduce arterial thrombosis risk in humans. (bloodjournal.org)
Normal hematocrit values are different for men, women, and children. (ahealthyme.com)
What Is a Normal Hematocrit? (emedicinehealth.com)
What is the normal hematocrit for pregnancy? (healthtap.com)
Now, my hematocrit is normal at 38.3, but hemoglobin 12.0 (range is 11.5-15.5). (healthtap.com)

A more complete understanding of this correlation would be helpful in estimating blood loss from changes in hematocrit in patients sustaining hemorrhage as well as in those receiving transfusions. (semanticscholar.org)

During arterial thrombosis, elevated hematocrit enhances platelet accumulation at the site of vessel injury. (bloodjournal.org)
Red blood cells (RBCs) demonstrate procoagulant properties in vitro , and elevated hematocrit is associated with reduced bleeding and increased thrombosis risk in humans. (bloodjournal.org)
However, effects of RBCs on thrombosis are difficult to assess because humans and mice with elevated hematocrit typically have co-existing pathologies. (bloodjournal.org)

Some patients with very low hematocrits may require intravenous iron, transfusions or medications to stimulate the production of red cells by the bone marrow. (emedicinehealth.com)

Hematocrit rotor provides dedicated blood processing to achieve 24 capillary separations per run for your clinical processing applications. (thomassci.com)

Marchioli and colleagues calculated incidence rates for the primary outcome of 1.1 per 100 patient-years for the low-hematocrit group versus 4.4 per 100 patient-years with the higher target. (medpagetoday.com)
So here, the hematocrit is much higher. (khanacademy.org)
The higher the column of red cells, the higher the hematocrit. (thefreedictionary.com)

The hematocrit measures how much space in the blood is occupied by red blood cells. (thefreedictionary.com)
Outcome measures:The main outcome measure for polycythaemia was haematocrit (Hct). (who.int)

Spin down hematocrits at 12,000 rpm in only 3 minutes. (thomassci.com)

The BioTrend ® oxygenation saturation and hematocrit system provides real-time information, alerting you immediately to any changes in your patient's blood values. (medtronic.com)
This study supports the use of quantitative susceptibility mapping for evaluation of in vivo venous oxygenation and postmortem hematocrit concentrations. (ajnr.org)

Among patients assigned to the low hematocrit target, 7.7% were started on phlebotomy and 5.5% on hydroxyurea. (medpagetoday.com)
Twenty-five patients with hematocrits of 60% or above have been studied. (annals.org)
Patients also underwent MR imaging examination of the brain, and hematocrit was measured in a subset of 45 patients. (ajnr.org)
Hematocrit data were used if obtained within 3 months of psychometric testing and if there were no confounding events in the patients' charts. (ajnr.org)
The incidence of mild mental deficiency was elevated at least 11-fold in a small sample of patients with sickle cell disease with no clinical history of stroke, and the full-scale intelligence quotient of these patients correlated with hematocrit ( 2 ). (ajnr.org)
Does Increasing Haemoglobin (Hb) or Haematocrit (Hct) Have a Pressor Effect in Dialysis Patients? (portlandpress.com)
6 - 8 In the present study, in which the clinical and biological data of 419 untreated patients (168 with known JAK2 status) consulting for an elevated hematocrit were collected, we compared the PVSG, WHO and new PV criteria and tried to determine the most efficient diagnostic strategy. (haematologica.org)
Hematocrit, HGB, and attenuation values did not differ between patients with stroke and controls. (ovid.com)
Methods: Data on patients with slide-confirmed uncomplicated falciparum malaria were pooled from 85 antimalarial drug trials conducted in 25 different countries, to assess the haemoglobin/haematocrit relationship at different time points in malaria. (www.gov.uk)
Using a linear random effects model, a conversion equation for haematocrit was derived based on 3,254 measurements from various time points (ranging from day 0 to day 63) from 1,810 patients with simultaneous measurements of both parameters. (www.gov.uk)

Hemoglobin, hematocrit and red blood cell count are part of a complete blood count. (home-remedies-for-you.com)
A low hematocrit, hemoglobin and red blood cell count indicates that you are anemic. (home-remedies-for-you.com)
processing the optical spectrum with a mathematical model to determine the blood hematocrit, the model being constructed by relating optical properties of the plurality of red blood cell constituents to known blood hematocrit. (google.ca)
5. A method of claim 1, wherein the mathematical model comprises a non-linear mathematical equation relating hematocrit to the reflectivity of the plurality of red blood cell constituents. (google.ca)
You may also need your hematocrit checked before having surgery or if your healthcare provider suspects you have a red blood cell disorder. (ahealthyme.com)
In children, red blood cell count and hematocrit are age-related. (uniprix.com)
Certain cancers (leukemia, multiple myeloma, Hodgkin's disease) as well as lupus, endocarditis, malnutrition and certain kidney diseases can also lower red blood cell count and hematocrit. (uniprix.com)

A novel method for evaluating hematocrit from microfluidic flow-separated blood samples was developed using gray scale analysis of a point-and-shoot digital photograph of separated blood in a micochannel. (rsc.org)

A system for determining the hematocrit transcutaneously and noninvasively. (freepatentsonline.com)

Thalassemia is a condition which can cause an increased number of red blood cells but a decreased size and hematocrit. (thefreedictionary.com)

Anatomy2

Organisms1

Diseases9

Chemicals and Drugs11

Analytical, Diagnostic and Therapeutic Techniques and Equipment26

Phenomena and Processes22

Disciplines and Occupations1

Technology, Industry, Agriculture1

Health Care1

Relaxin is a potent renal vasodilator in conscious rats. (1/3107)

O-raffinose cross-linking markedly reduces systemic and renal vasoconstrictor effects of unmodified human hemoglobin. (2/3107)

Septicemia in dialysis patients: incidence, risk factors, and prognosis. (3/3107)

Evaluation of pulmonary volumetric morphometry at the light and electron microscopy level in several species of passerine birds. (4/3107)

Hematocrit correlates with blood pressure in young male office workers. (5/3107)

Maintenance of normal agonist-induced endothelium-dependent relaxation in uraemic and hypertensive resistance vessels. (6/3107)

Mechanism for the posture-specific plasma volume increase after a single intense exercise protocol. (7/3107)

Efficacy of recombinant human Hb by 31P-NMR during isovolemic total exchange transfusion. (8/3107)

Hematocrit

Hemodilution

Blood Viscosity

Erythrocyte Count

Plasma Volume

Hemoglobins

Erythropoietin

Anemia

Polycythemia

Erythrocyte Volume

Blood Volume

Exchange Transfusion, Whole Blood

Erythrocyte Indices

Bloodletting

Erythrocytes

Hematologic Tests

Hemoglobinometry

Erythrocyte Aggregation

Blood Cell Count

Plasma Substitutes

Iron

Erythrocyte Transfusion

Blood Chemical Analysis

Reticulocyte Count

Erythropoiesis

Blood Pressure

Oxygen

Blood Volume Determination

Hemorheology

Blood Transfusion

Phlebotomy

Blood Proteins

Renal Dialysis

Kidney Failure, Chronic

Anemia, Neonatal

Erythrocyte Deformability

Isotonic Solutions

Altitude

Dehydration

Serum Albumin

Platelet Count

Anemia, Hypochromic

Hydroxyethyl Starch Derivatives

Time Factors

Blood Substitutes

Capillaries

Hemodynamics

Body Weight

Blood Transfusion, Autologous

Polycythemia Vera

Ferritins

Blood Flow Velocity

Blood Loss, Surgical

Microcirculation

Eagles

Rheology

Cerebrovascular Circulation

Reference Values

Blood Specimen Collection

Relaxin is a potent renal vasodilator in conscious rats. (1/3107)

O-raffinose cross-linking markedly reduces systemic and renal vasoconstrictor effects of unmodified human hemoglobin. (2/3107)

Septicemia in dialysis patients: incidence, risk factors, and prognosis. (3/3107)

Evaluation of pulmonary volumetric morphometry at the light and electron microscopy level in several species of passerine birds. (4/3107)

Hematocrit correlates with blood pressure in young male office workers. (5/3107)

Maintenance of normal agonist-induced endothelium-dependent relaxation in uraemic and hypertensive resistance vessels. (6/3107)

Mechanism for the posture-specific plasma volume increase after a single intense exercise protocol. (7/3107)

Efficacy of recombinant human Hb by 31P-NMR during isovolemic total exchange transfusion. (8/3107)

Diabetes And Low Hematocrit - Help for Diabetic

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will donating a regular amount of blood still lower hematocrit?

AID 476833 - Toxicity in FVB mouse assessed as effect on hematocrit at 50 mg/kg, po administered 5 times per week for 2 weeks...

Patent US6006119 - Non-invasive optical measurement of blood hematocrit - Google Patents

High hemoglobin and hematocrit testosterone

Elevated Haematocrit in PV with Conventional Treatments | JAKAVI

Effects of hematocrit on brain metabolism in experimentally induced cerebral ischemia in spontaneously hypertensive rats (SHR)....