Hemodilution
Hematocrit
Plasma Substitutes
Blood Viscosity
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.
Blood Substitutes
Hydroxyethyl Starch Derivatives
Bloodletting
Oxygen
Hemoglobins
Dextrans
Isotonic Solutions
Mesocricetus
Plasma Volume
Blood Volume Determination
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.
Erythrocyte Volume
Exchange Transfusion, Whole Blood
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.
Specific Gravity
Blood Transfusion, Autologous
Blood Transfusion
Hemodynamics
Hemorheology
Hypovolemia
Cardiac Output
Cardiopulmonary Bypass
Colloids
Two-phase systems in which one is uniformly dispersed in another as particles small enough so they cannot be filtered or will not settle out. The dispersing or continuous phase or medium envelops the particles of the discontinuous phase. All three states of matter can form colloids among each other.
Hypotension, Controlled
Effect of acute normovolemic hemodilution on distribution of blood flow and tissue oxygenation in dog skeletal muscle. (1/325)
Acute normovolemic hemodilution (ANH) is efficient in reducing allogenic blood transfusion needs during elective surgery. Tissue oxygenation is maintained by increased cardiac output and oxygen extraction and, presumably, a more homogeneous tissue perfusion. The aim of this study was to investigate blood flow distribution and oxygenation of skeletal muscle. ANH from hematocrit of 36 +/- 3 to 20 +/- 1% was performed in 22 splenectomized, anesthetized beagles (17 analyzed) ventilated with room air. Normovolemia was confirmed by measurement of blood volume. Distribution of perfusion within skeletal muscle was determined by using radioactive microspheres. Tissue oxygen partial pressure was assessed with a polarographic platinum surface electrode. Cardiac index (3.69 +/- 0.79 vs. 4.79 +/- 0.73 l. min-1. m-2) and muscle perfusion (4.07 +/- 0.44 vs. 5.18 +/- 0.36 ml. 100 g-1. min-1) were increased at hematocrit of 20%. Oxygen delivery to skeletal muscle was reduced to 74% of baseline values (0.64 +/- 0.06 vs. 0.48 +/- 0.03 ml O2. 100 g-1. min-1). Nevertheless, tissue PO2 was preserved (27.4 +/- 1.3 vs. 29.9 +/- 1. 4 Torr). Heterogeneity of muscle perfusion (relative dispersion) was reduced after ANH (20.0 +/- 2.2 vs. 13.9 +/- 1.5%). We conclude that a more homogeneous distribution of perfusion is one mechanism for the preservation of tissue oxygenation after moderate ANH, despite reduced oxygen delivery. (+info)Hemodilution, cerebral O2 delivery, and cerebral blood flow: a study using hyperbaric oxygenation. (2/325)
Hemodilution reduces blood viscosity and O2 content (CaO2) and increases cerebral blood flow (CBF). Viscosity and CaO2 may contribute to increasing CBF after hemodilution. However, because hematocrit is the major contributor to blood viscosity and CaO2, it has been difficult to assess their relative importance. By varying blood viscosity without changing CaO2, prior investigation in hemodiluted animals has suggested that both factors play roughly equal roles. To further investigate the relationship of hemodilution, blood viscosity, CaO2, and CBF, we took the opposite approach in hemodiluted animals, i.e., we varied CaO2 without changing blood viscosity. Hyperbaric O2 was used to restore CaO2 to normal after hemodilution. Pentobarbital sodium-anesthetized rats underwent isovolumic hemodilution with 6% hetastarch, and forebrain CBF was measured with [3H]nicotine. One group of animals did not undergo hemodilution and served as controls (Con). In the three experimental groups, hematocrit was reduced from 44% to 17-19%. Con and hemodiluted (HDil) groups were ventilated with 40% O2 at 101 kPa (1 atmosphere absolute), which resulted in CaO2 values of 19.7 +/- 1.3 and 8.1 +/- 0.7 (SD) ml O2/dl, respectively. A second group of hemodiluted animals (HBar) was ventilated with 100% O2 at 506 kPa (5 atmospheres absolute) in a hyperbaric chamber, which restored CaO2 to an estimated 18.5 +/- 0.5 ml O2/dl by increasing dissolved O2. A fourth group of hemodiluted animals (HCon) served as hyperbaric controls and were ventilated with 10% O2 at 506 kPa, resulting in CaO2 of 9.1 +/- 0.6 ml O2/dl. CBF was 79 +/- 19 ml. 100 g-1. min-1 in the Con group and significantly increased to 123 +/- 9 ml. 100 g-1. min-1 in the HDil group. When CaO2 was restored to baseline with dissolved O2 in the HBar group, CBF decreased to 104 +/- 20 ml. 100 g-1. min-1. When normoxia was maintained during hyperbaric exposure in the HCon group, CBF was 125 +/- 18 ml. 100 g-1. min-1, a value indistinguishable from that in normobaric HDil animals. Our data demonstrate that the reduction in CaO2 after hemodilution is responsible for 40-60% of the increase in CBF. (+info)Extreme, progressive isovolemic hemodilution with 5% human albumin, PentaLyte, or Hextend does not cause hepatic ischemia or histologic injury in rabbits. (3/325)
BACKGROUND: Physicians and their patients are greatly concerned about perioperative blood administration. Although isovolemic hemodilution is utilized to decrease the incidence of transfusion, it is unclear at what degree of hemodilution hepatoenteric ischemia and injury occurs. The authors hypothesized that hepatic ischemia, systemic ischemia, and tissue injury would occur during hemodilution in rabbits, and that the severity of ischemia and injury may be dependent on the fluid administered. METHODS: Rabbits anesthetized with isoflurane were assigned randomly to a sham-operated group (n = 8) or groups that underwent four isovolemic hemodilutions (25% of the blood volume removed at hourly intervals), with blood replaced with one of three solutions: balanced electrolyte solutions containing 6% pentastarch (n = 8), 6% hetastarch (n = 9), or 5% human albumin in normal saline (n = 8). Arterial ketone body ratio and plasma lactate, respectively, served as measures of hepatic and systemic ischemia. Gastric, duodenal, and hepatic histologic injury was assessed post mortem. RESULTS: Hemodilution from a baseline hematocrit of about 33% to about 8% (third hemodilution) with all three colloids did not result in a significant increase in plasma lactate concentration or decrease in arterial ketone body ratio. At a hematocrit of about 5% (fourth hemodilution), the hetastarch group had a significantly (P < 0.05) greater plasma lactate concentration than the sham-operated and 5% human albumin groups. There were no significant differences in arterial ketone body ratio or histologic injury between the groups. CONCLUSIONS: Isovolemic hemodilution (approximately 5% hematocrit) with albumin, pentastarch, or hetastarch solutions does not result in significant hepatic ischemia or injury assessed by histology. (+info)Effect of 20% in vitro haemodilution with warmed buffered salt solution and cerebrospinal fluid on coagulation. (4/325)
We have conducted an in vitro coagulation study consisting of two separate groups of 20 subjects using the thrombelastograph. In the first group, haemodilution was performed with a physiological balanced salt solution similar to plasma, with the exception of calcium, and buffered to a normal pH (Plasmalyte B) at 37 degrees C on blood obtained from consenting volunteers. In the second group, a protein-poor body fluid (cerebrospinal fluid (CSF)) obtained from parturient patients undergoing spinal anaesthesia for Caesarean section was used as the diluent. There were statistically significant differences between the warmed Plasmalyte B treated samples and their untreated controls for all variables measured by the thrombelastograph, except for maximum amplitude, and between the CSF treated samples and their untreated controls for all variables. We conclude that electrolyte and acid-base composition of the diluent fluid had no effect on the observation that crystalloid haemodilution produces hypercoagulability. The marked increase in coagulability produced by addition of CSF cannot be explained on a simple haemodilution basis and confirms previous suggestions of the presence of a procoagulant factor in CSF. (+info)Repetitive hemodilution in chronic obstructive pulmonary disease and pulmonary hypertension: effects on pulmonary hemodynamics, gas exchange, and exercise capacity. (5/325)
BACKGROUND: In cor pulmonale associated with severe chronic obstructive pulmonary disease (COPD), disturbances of pulmonary microcirculation may contribute significantly to hypoxemia, pulmonary hypertension, and exercise intolerance. OBJECTIVE: It was tested whether reduction of blood viscosity induced by repetitive hemodilution might improve pulmonary hemodynamics and oxygen uptake. METHODS: Seven patients with stable COPD (forced expiratory volume in 1 s 33 +/- 3 % of predicted, means +/- SE) and pulmonary hypertension were phlebotomized 5-6 times over a period of 3 months with substitution of 6% hydroxyethyl starch (molecular weight 40, 000). This resulted in a stepwise reduction of the hematocrit from 53.3 +/- 2.6 to 45.8 +/- 3.1% and a reduction of whole blood viscosity from 9.8 +/- 0.6 to 8.8 +/- 0.7 mPa x s at a shear rate of 2.0 s-1. Before and after the treatment period, patients underwent cardiopulmonary exercise testing and right heart catheterization. RESULTS: Mean pulmonary artery pressure (PAm) decreased from 30 +/- 3 to 22 +/- 2 mm Hg and arterial oxygen partial pressure (PaO2) increased from 63.2 +/- 2.2 to 71.8 +/- 3.7 mm Hg at rest. During peak exercise, PAm decreased from 59 +/- 7 to 53 +/- 7 mm Hg and PaO2 increased from 54.0 +/- 5.7 to 63.2 +/- 2.4 mm Hg after hemodilution. Peak oxygen consumption rose from 573 +/- 84 to 750 +/- 59 ml x min-1, corresponding to an increase in cardiac index from 4.25 +/- 0.5 to 5.88 +/- 0.76 liters x min-1 x m-2. Pulmonary vascular resistance fell from 345 +/- 53 to 194 +/- 32 dyn x s x cm-5. The patients' peak exercise capacity increased from 9.2 +/- 2. 0 before to 13.5 +/- 3.2 kJ at the end of the study (p < 0.05 for all differences, paired t test). CONCLUSION: The findings suggest that a prolonged improvement of pulmonary microcirculation by reducing blood viscosity may improve pulmonary gas exchange, central hemodynamics, and exercise tolerance in patients with severe COPD and pulmonary hypertension. (+info)Acute normovolaemic haemodilution vs controlled hypotension for reducing the use of allogeneic blood in patients undergoing radical prostatectomy. (6/325)
Blood loss in patients undergoing radical prostatectomy may be substantial. In a randomized, prospective study, we assessed two methods of reducing the need for allogeneic blood transfusion with regard to efficacy and costs. Sixty patients undergoing retropubic radical prostatectomy were allocated randomly to one of three groups. In group 1 (n = 20), acute normovolaemic haemodilution (ANH) was initiated after induction of anaesthesia; autologous blood 15 ml kg-1 was withdrawn and replaced by colloid solutions (gelatin) to maintain haemodynamic stability. In group 2 (n = 20), controlled hypotension was established using sodium nitroprusside (target mean arterial pressure (MAP) approximately 50 mm Hg). Group 3 (n = 20), without manipulations, served as a control group. Troponin T (TnT), a sensitive marker for myocardial ischaemia, and various coagulation variables were measured in the perioperative period. Packed red blood cells (PRBC) were given when haemoglobin concentration was less than 7 g dl-1. Cost calculations did not include hospital overhead costs or staff costs. In the ANH group, mean 1278 (SD 150) ml of autologous blood were withdrawn. Significantly more volume was infused in the ANH patients (gelatin 2450 (550) ml) than in the two other groups. Coagulation data (platelet count, activated partial thromboplastin time (aPTT), fibrinogen, antithrombin III (AT III), D-dimers) did not differ significantly between the three groups. The hypotension group had significantly lower blood loss (1260 (570) ml), whereas the ANH (1820 (680) ml) and control group (1920 (590) ml) did not differ significantly. Patients in the hypotension group needed significantly less PRBC (total 14 units; 75% of patients did not need PRBC) than the ANH (total 21 units; 55% of patients did not need PRBC) or control patients (total 28 units; 40% of patients did not need PRBC). Total costs were lowest in the hypotension group (41% less than in the control patients) (P < 0.05). We conclude that the use of hypotension during radical prostatectomy resulted in approximately 40% reduction in total transfusion costs. ANH was less effective and more costly than controlled hypotension. (+info)Pulse oximetry plethysmographic waveform during changes in blood volume. (7/325)
Systolic pressure variation (SPV) and its dDown component have been shown to be sensitive factors in estimating intravascular volume in patients undergoing mechanical ventilation. In this study, ventilation-induced changes in pulse oximeter plethysmographic waveform were evaluated after removal and after reinfusion of 10% estimated blood volume. The plethysmographic waveform variation (SPVplet) was measured as the difference between maximal and minimal peaks of waveform during the ventilatory cycle, and expressed as a percentage of the signal amplitude during apnoea. dUp(plet) and dDown(plet) were measured as the distance between the apnoeic plateau and the maximal or minimal plethysmographic systolic waveform, respectively. Intravascular volume was changed by removal of 10% of estimated blood volume and followed by equal volume replacement with Haemaccel. A 10% decrease in blood volume increased SPVplet from mean 17.0 (SD 11.8)% to 31.6 (28.0)% (P = 0.005) and dDown(plet) from 8.7 (5.1)% to 20.5 (12.9)% (P = 0.0005) compared with baseline. Changes in plethysmographic waveform correlated with changes in arterial SPV and dDown (r = 0.85; P = 0.0009). In the absence of invasive arterial pressure monitoring, ventilation-induced waveform variability of the plethysmographic signal measured from pulse oximetry is a useful tool in the detection of mild hypovolaemia. (+info)Cerebral response to haemodilution during cardiopulmonary bypass in dogs: the role of nitric oxide synthase. (8/325)
During cardiopulmonary bypass, haemodilution is standard practice and is accompanied by increases in cerebral blood flow (CBF). We investigated if changes in cerebral vascular resistance (CVR) during cardiopulmonary bypass-haemodilution are dependent on nitric oxide synthase. The cerebral response to haemodilution in nine dogs treated with the nitric oxide synthase inhibitor, N omega-nitro-L-arginine methyl ester (L-NAME), was compared with a control group (n = 8). Both groups underwent serial isovolaemic haemodilution (target packed cell volumes 0.39, 0.26, 0.19 and 0.14) using 6% dextran 70. CBF, CVR and cerebral metabolic rate for oxygen (CMRO2) were measured. While initial CVR was different in the two groups, haemodilution-dependent reductions in CVR were equivalent and the curves describing the packed cell volume-CVR relationship were parallel in control and nitric oxide synthase inhibition groups. Our data indicate that nitric oxide synthase does not play a primary role in the cerebral response to haemodilution. (+info)Responsiveness of stroke volume variation and central venous pressure during acute normovolemic and hypervolemic hemodilution<...
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Isovolemic hemodilution; Anticoagulation; Dislodging or fragmenting thrombus or embolus; Thrombolysis; and Hyperbaric oxygen. ...
Patient blood management
Shander A, Rijhwani TS (December 2004). "Acute normovolemic hemodilution". Transfusion. 44 (12 Suppl): 26S-34S. doi:10.1111/j. ... Another technique, acute normovolemic hemodilution, involves the collection of a selected calculated volume of the patient's ... "Acute Normovolemic Hemodilution Reduces Allogeneic Red Blood Cell Transfusion in Cardiac Surgery: A Systematic Review and Meta- ...
Diana Beresford-Kroeger
Her thesis was entitled, Myocardial Ischemia and the use of non-typing artificial blood in hemodilution.[citation needed] ... 1984 Oct;62(10):1333-7. Myocardial blood flow and O2-supply following dextran-haemodilution and methaemoglobinaemia in the dog ... Myocardial oxygen-supply during hemodilution with stroma-free hemoglobin and methemoglobin solutions. Biro GP, Beresford- ... hemorheologic changes following acute experimental coronary occlusion and salutary antihyperviscosity effect of hemodilution ...
Prostate-specific antigen
November 2007). "Obesity-related plasma hemodilution and PSA concentration among men with prostate cancer". JAMA. 298 (19): ...
Orthogonal polarization spectral imaging
"Validation of OPS imaging for microvascular measurements during isovolumic hemodilution and low hematocrits". Am J Physiol ...
Retrograde autologous priming
However, there are still some studies showing a failure of RAP to limit the hemodilution after the open heart operation. The ... The hemodilution is the primary hematologic interference which results in coagulopathy and decreased capability of carrying ... Although RAP is an effective and safe technique to reduce the hemodilution during CPB, there are still some potential risks of ... Thus, there is a high incidence of distinct degrees of hemodilution with CPB.[citation needed] RAP is a blood conservation ...
Intravascular volume status
"Blood Volume Analysis Can Distinguish True Anemica From Hemodilution in Critically Ill Trauma Patients". Western Trauma ...
Wassim Michael Haddad
Control for Compartmental Systems with Application to Introoperative Anesthesia Influenced by Hemorrhage and Hemodilution ...
Hemodynamics
Clearly, the greater the Hi and the greater the number of units removed during hemodilution, the more effective ANH is for ... During acute normovolemic hemodilution (ANH), blood subsequently lost during surgery contains proportionally fewer red blood ... This is based on the assumption that each unit removed by hemodilution has a volume of 450 mL (the actual volume of a unit will ... can be calculated from the patient's Hi and the final hematocrit after hemodilution(Hm) R C M = E V B × ( H i − H m ) {\ ...
Thromboelastometry
In reality various effects overlap, including haemodilution or application of high doses of parenteral anticoagulants. High ...
Deep hypothermic circulatory arrest
Haemodilution, typically to a haematocrit of 20%, is thought to improve flow in the microcirculation. "Cerebral protection and ...
Jehovah's Witnesses and blood transfusions
Transfusions of autologous blood part of a "current therapy". Hemodilution, a modified technique in which equipment is arranged ... In 1989, The Watchtower stated, "Each individual must decide" whether to accept hemodilution and autologous blood salvage (cell ... such as hemodilution or cell salvage, are a matter of personal choice, according to what a person's conscience permits. A ...
Dextran
The hemodilution caused by volume expansion with dextran use improves blood flow, thus further improving patency of ...
Volume expander
... this parameter is decreased by crystalloids due to hemodilution. Therefore, they should theoretically preferentially increase ...
Intravenous therapy
... this parameter is decreased by crystalloids due to hemodilution. Crystalloids generally are much cheaper than colloids. Buffer ...
Cardiothoracic surgery
Nazih Zuhdi performed the first total intentional hemodilution open heart surgery on Terry Gene Nix, age 7, on February 25, ... using the total intentional hemodilution machine. In 1985 Zuhdi performed Oklahoma's first successful heart transplant on Nancy ...
Cardiac surgery
Nazih Zuhdi performed the first total intentional hemodilution open-heart surgery on Terry Gene Nix, age 7, on 25 February 1960 ... using the total intentional hemodilution machine. In the early 1990s, surgeons began to perform off-pump coronary artery bypass ...
Hemoglobin
... can be tracked noninvasively, to build an individual data set tracking the hemoconcentration and hemodilution ...
Subarachnoid hemorrhage
... and hemodilution (mild dilution of the blood). Evidence for this approach is inconclusive; no randomized controlled trials have ...
Bloodless surgery
Many doctors view acute normovolemic hemodilution, a form of storage of a patient's own blood, as a pillar of "bloodless ...
Dilution
Hemodilution, in blood Dilation (disambiguation) This disambiguation page lists articles associated with the title Dilution. If ...
Saprolegnia
A Saprolegnia infection is usually fatal, eventually causing hemodilution, though the time to death varies depending on the ...
Perfusionist
... and hemodilution. Sometimes, perfusionists are granted administrative tasks such as purchasing supplies or equipment, as well ...
Human serum albumin
... hemodilution [as in pregnancy], increased vascular permeability or decreased lymphatic clearance) Acute disease states ( ...
Jehovah's Witnesses
... hemodilution Archived September 7, 2008, at the Wayback Machine, heart lung machine, dialysis, epidural blood patch Archived ...
Andre Francis Palmer
"Hemodynamics and tissue oxygenation after hemodilution with ultrahigh molecular weight polymerized albumin" Minerva ...
Platelet-rich plasma
Ferrari M, Zia S, Valbonesi M, Henriquet F, Venere G, Spagnolo S, Grasso MA, Panzani I. A new technique for hemodilution, ...
Triple H (disambiguation)
... and hemodilution Triple H syndrome, a urea-cycle disorder Search for "triple-h" on Wikipedia. HHH (disambiguation) 3H ( ...
Intraoperative blood salvage
Acute normovolemic hemodilution (ANH) is a form of autologous transfusion where whole blood is collected from a patient at the ...
Hypovolemic shock
The simultaneous loss of coagulation factors via hemorrhage, hemodilution with resuscitation fluids, and coagulation cascade ...
A feasibility and safety study of intracoronary hemodilution during primary coronary angioplasty in order to reduce reperfusion...
Transcatheter intracoronary hemodilution with room temperature perfusate during PPCI is feasible and appears safe. Such a ... A feasibility and safety study of intracoronary hemodilution during primary coronary angioplasty in order to reduce reperfusion ... Conclusions: Transcatheter intracoronary hemodilution with room temperature perfusate during PPCI is feasible and appears safe ... designed a pilot study to evaluate safety and feasibility of an inexpensive and simple approach to intracoronary hemodilution ...
Cardioprotective effects of acute normovolemic hemodilution in patients undergoing coronary artery bypass... | Archive ouverte...
Aged - Coronary Artery Bypass/adverse effects - Female - Heart Diseases/etiology/prevention & control - Hemodilution/methods - ... LICKER, Marc et al. Cardioprotective effects of acute normovolemic hemodilution in patients undergoing coronary artery bypass ... Cardioprotective effects of acute normovolemic hemodilution in patients undergoing coronary artery bypass surgery. ... We hypothesized that lowering blood viscosity with acute normovolemic hemodilution (ANH) would confer additional ...
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The influence of hemodilution on outcome after hypothermic cardiopulmonary bypass: Results of a randomized trial in infants<...
The influence of hemodilution on outcome after hypothermic cardiopulmonary bypass: Results of a randomized trial in infants. ... Conclusions: Hemodilution to a hematocrit level in wide use for cardiopulmonary bypass and thought to be safe is associated ... Conclusions: Hemodilution to a hematocrit level in wide use for cardiopulmonary bypass and thought to be safe is associated ... Conclusions: Hemodilution to a hematocrit level in wide use for cardiopulmonary bypass and thought to be safe is associated ...
IMSEAR at SEARO: Preoperative autologous blood collection and haemodilution with dextran.
After the end of haemodilution, another blood samples (as study samples) were once collected for analysis. Haematocrit, ... In conclusion, the autologous blood collection and haemodilution technique was suitable and possibly practical in ever elective ... Preoperative autologous blood collection and haemodilution with dextran.. Authors: Vichitvejpaisal, Phongthara. ... Preoperative autologous blood collection and haemodilution with dextran. Siriraj Medical Journal, 1991 Mar; 43(3): 155-159. ...
Obesity-related plasma hemodilution and PSA concentration among men with prostate cancer<...
Obesity-related plasma hemodilution and PSA concentration among men with prostate cancer. In: Journal of the American Medical ... Obesity-related plasma hemodilution and PSA concentration among men with prostate cancer. Journal of the American Medical ... Obesity-related plasma hemodilution and PSA concentration among men with prostate cancer. / Bañez, Lionel L.; Hamilton, Robert ... Dive into the research topics of Obesity-related plasma hemodilution and PSA concentration among men with prostate cancer. ...
Don't Be A Victim Of Hemodilution!! - Hinerman Group
Dont Be A Victim Of Hemodilution!! - Hinerman Group, High Risk Life Insurance Quotes You Can Trust. ... Home » Life Insurance Blog » Dont Be A Victim Of Hemodilution!!. Dont Be A Victim Of Hemodilution!!. by Ed Hinerman , Nov 21 ... If the theory of hemodilution is correct, obese men are at risk of not having prostate cancer detected as early as their ... is that obesity can make early detection of prostate cancer harder due to a process called hemodilution [...] ...
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Autologous (acute) normovolemic hemodilution. This technique involves collecting a patients blood (2-4 units) into ... The evidence on the overall efficacy of autologous normovolemic hemodilution is conflicting with respect to blood savings and ... What is autologous (acute) normovolemic hemodilution?. What are the disadvantages of preoperative autologous donation for ... Segal JB, Blasco-Colmenares E, Norris EJ, Guallar E. Preoperative acute normovolemic hemodilution: a meta-analysis. Transfusion ...
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Hemodilution and priming solutions. In: Gravlee G, Davis R, Stammers A, Ungerleider R, eds. Cardiopulmonary bypass principles ... Adjunct techniques-hemodilution. In: Peirce EC, ed. Extracorporeal circulation for open-heart surgery: pathophysiology, ... Cooper JR Jr, Slogoff S. Hemodilution and priming solutions for cardiopulmonary bypass. In: Gravlee GP, Davis RF, Stammers AH, ... along with concerns about the high viscosity of the resultant CPB prime solution led to experiments with hemodilution and ...
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In patients with a normal blood volume, hemodilution lasts for a much shorter period. The rapid rise in blood pressure, which ... When circulating blood volume has been reduced, hemodilution following the administration of albumin persists for many hours. ... of albumin should be supplemented by the transfusion of whole blood to treat the relative anemia associated with hemodilution. ...
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Acute normovolemicPreoperativeAutologousSalvagePlateletAnemiaObesePregnancyMethodsReperfusionObesityMechanismEffectsStudyPatientsLevelNormovolaemic haemodilutionHomologous blood transfusionNormovolemic hemodilution in patientsHypervolemiaIsovolemic hemodilutionHypothermiaMyocardial IschemiaIsovolumicHematocritPreoperativeHemoglobinAortic surgeryThrombocytopeniaPerfusionIntraoperativeDecreaseSalineHypertensionFluidOccurSurgicalModerateHemorrhageCardiacEffectResultsSurgeryVolumeClinicalMechanismsStateAlter
Acute normovolemic3
- Cardioprotective effects of acute normovolemic hemodilution in patients undergoing coronary artery bypass. (unige.ch)
- We hypothesized that lowering blood viscosity with acute normovolemic hemodilution (ANH) would confer additional cardioprotection in patients undergoing coronary artery bypass surgery (CABG) with aortic cross-clamping. (unige.ch)
- Acute normovolemic hemodilution (ANH) is a blood conservation strategy associated with variable success, and rarely studied in more complex cardiac procedures. (uab.edu)
Preoperative1
- IMSEAR at SEARO: Preoperative autologous blood collection and haemodilution with dextran. (who.int)
Autologous2
- In conclusion, the autologous blood collection and haemodilution technique was suitable and possibly practical in ever elective surgical patients without any undesirable side effects. (who.int)
- Processes include autologous hemodilution and cell salvage , and treating or averting anemia pre- and post-surgery. (hopkinsmedicine.org)
Salvage1
- Intraoperative blood conservation techniques can be utilized with either use of hemodilution or blood salvage with recirculation methods to minimize need for other forms of blood replacement. (rchsd.org)
Platelet1
- Thrombocytopenia caused by platelet destruction, hypersplenism, or hemodilution. (medlineplus.gov)
Anemia1
- Anemia - The anemia observed in splenomegaly results from sequestration and hemodilution. (medscape.com)
Obese4
- Because men with higher body mass index (BMI) have greater circulating plasma volumes, lower PSA concentrations among obese men may be due to hemodilution. (elsevier.com)
- Objective: To determine the association between hemodilution and PSA concentration in obese men with prostate cancer. (elsevier.com)
- hemodilution may therefore be responsible for the lower serum PSA concentrations among obese men with prostate cancer. (elsevier.com)
- If the theory of hemodilution is correct, obese men are at risk of not having prostate cancer detected as early as their smaller counterparts. (hinermangroup.com)
Pregnancy3
- With normal pregnancy, blood volume increases, which results in a concomitant hemodilution. (medscape.com)
- Total calcium level decreases during pregnancy, due to hemodilution, while the ionized calcium level remains stable [2 ]. (who.int)
- Meanwhile, physiological hemodilution carries in pregnancy an important adaptive function. (iospress.com)
Methods1
- Methods: In a single-center randomized trial with blinded assessment of outcomes, we compared use of 2 hemodilution protocols during hypothermic cardiopulmonary bypass with infant cardiac surgery. (elsevier.com)
Reperfusion2
- We designed a pilot study to evaluate safety and feasibility of an inexpensive and simple approach to intracoronary hemodilution during primary angioplasty (PPCI) to reduce reperfusion injury. (nih.gov)
- The underlying mechanism is likely to be multifactorial, involving operative trauma, hemodilution and endothelial damage by edema, ischemia/reperfusion of organs, and contact-activation of blood components during ECC [ 2 , 3 ]. (hindawi.com)
Obesity1
- Obesity is associated with a hemodilution of PSA, therefore decreasing the risk of referral for biopsy," he said. (renalandurologynews.com)
Mechanism1
- Under these conditions, moderate hemodilution is an effective mechanism for preventing the development of severe disseminated intravascular coagulation (DIC) in labor, during surgery, in various forms of obstetric pathology. (iospress.com)
Effects1
- Dextrans cause a hypervolemic hemodilution and affect factor VIII, with both these effects influencing blood flow. (medscape.com)
Study1
- After the end of haemodilution, another blood samples (as study samples) were once collected for analysis. (who.int)
Patients1
- Haemodilution is common in patients with advanced heart failure // Circulation. (medline.ru)
Level1
- Conclusions: Hemodilution to a hematocrit level in wide use for cardiopulmonary bypass and thought to be safe is associated with adverse perioperative and developmental outcomes in infants. (elsevier.com)
Normovolaemic haemodilution2
- Acute normovolaemic haemodilution - an old, outdated friend? (nataonline.com)
- After ineffective conservative treatement including plasmaexpander such as Hydroxyaethylstarch or others, normovolaemic haemodilution, cortisone and oral haemo-rheological substances, HBOT is effective in 50% of the cases to reduce hearing loss by 20 dB or more. (hyperbaricoxygentherapy.com)
Homologous blood transfusion2
- 16. [Extreme normovolemic hemodilution as homologous blood saving measure in refusal of homologous blood transfusion]. (nih.gov)
- Effect of an homologous blood transfusion and hemodilution on the central hemodynamics and myocardial contractile function]. (doximity.com)
Normovolemic hemodilution in patients1
- 2. [Hemodynamics in controlled normovolemic hemodilution in patients with obliterative vascular diseases]. (nih.gov)
Hypervolemia3
- Use with caution in conditions where hypervolemia and its consequences or hemodilution could represent a special risk to the patient. (nih.gov)
- Induced hypertension, hypervolemia, and hemodilution (ie, "triple-H therapy") aimed to maintain adequate cerebral perfusion pressure in the setting of impaired cerebrovascular autoregulation. (medscape.com)
- Hypervolemia: Use with caution in patients who are at risk of hypervolemia or hemodilution. (nih.gov)
Isovolemic hemodilution2
Hypothermia2
- 50-52 Although hemodilution increases cerebral blood flow, 53 it may limit oxygen delivery by reducing the oxygen carrying capacity of blood, in the setting of the leftward shift of oxyhemoglobin dissociation induced by hypothermia. (firebaseapp.com)
- IV infusion of chilled saline, while shown to be effective in many cases, has numerous side effects, including hemodilution, potential fluid overload in patients with heart failure, coagulopathy, increased infection rates, reduced drug effectiveness, and excessive patient hypothermia that can result in shivering and potential re-arrest. (jems.com)
Myocardial Ischemia1
- The higher heart rates that developed during hemodilution may have contributed to the development of an imbalance between myocardial supply and demand resulting in ECG evidence of myocardial ischemia. (aku.edu)
Isovolumic4
- We conducted two separate protocols utilizing intravenous infusion of a nitric oxide synthase inhibitor and isovolumic haemodilution to assess the influence of nitric oxide on neurovascular coupling in humans. (southwales.ac.uk)
- Isovolumic haemodilution did not alter neurovascular coupling. (southwales.ac.uk)
- 2) NVC was assessed prior to and following isovolumic haemodilution, whereby 20% of whole blood was removed and replaced with 5% human serum albumin to reduce haemoglobin concentration (n = 8). (southwales.ac.uk)
- n = 6, aged 39 ± 17 yr), before and during isovolumic hemodilution with room air and hyperoxia (end-tidal Po2 = 100 mmHg). (cardiffmet.ac.uk)
Hematocrit2
- Also you can check the serial results for Na, Hb Hemodilution during cardiopulmonary bypass is currently almost universal for cardiopulmonary bypass, but the minimum safe hematocrit has been controversial. (firebaseapp.com)
- Hemodilution uses the ideal blood volume and serial hematocrit measures drawn before and after administration of a known quantity of IV fluid to estimate blood volume. (firebaseapp.com)
Preoperative2
- 7. Effects of a hemoglobin-based oxygen carrier (HBOC-201) on hemodynamics and oxygen transport in patients undergoing preoperative hemodilution for elective abdominal aortic surgery. (nih.gov)
- 12. [Effect of acute preoperative hemodilution on circulation, oxygen budget and blood coagulation]. (nih.gov)
Hemoglobin2
- Masimo has announced the findings of an abstract that compared Masimo noninvasive and continuous hemoglobin (SpHb) to intermittent and invasive lab hemoglobin (LabHb) in reflecting iatrogenic hemodilution during incremental fluid administration of patients undergoing major surgery. (mpo-mag.com)
- Our study also demonstrates that continuous monitoring of hemoglobin (SpHb) through Masimo Pulse CO-Oximetry sensors may detect the development of such iatrogenic hemodilution in real time. (mpo-mag.com)
Aortic surgery1
- Our hypothesis is that the use of the RAP method in aortic surgery may result in a limitation of hemodilution and a decrease in fHb levels. (annals.in)
Thrombocytopenia1
- Thrombocytopenia caused by platelet destruction, hypersplenism, or hemodilution. (medlineplus.gov)
Perfusion2
- The goal of optimized perfusion is to minimize the impact of CPB on patient outcomes by reducing hemodilution and blood contact surface area, minimizing GME and improving biocompatibility, while providing high performance. (livanova.com)
- The difficulty off ECC government are aggravated by the possible lack of EBM-centered requirements covering basic haemodynamic parameters, i.e., pump disperse rates and you may perfusion pressure, also haemodilution variety otherwise evidence on vasoconstrictors have fun with. (rasam-polymer.ir)
Intraoperative1
- Case report: intraoperative management of extreme hemodilution in a patient with a severed axillary artery. (bloodless.com.br)
Decrease4
- The researchers concluded, "Fluid loading as part of goal-directed therapy may cause a paradoxical decrease in DO 2 due to the development of iatrogenic hemodilution. (mpo-mag.com)
- The development of iatrogenic hemodilution is reflected by a real-time decrease in the SpHb trend, which is similar to the intermittent LabHb trend. (mpo-mag.com)
- 1. Bubenek S, Valeanu L, Popescu M, Cacoveanu M, Tomescu D, and Perel A. Optimization of cardiac output by incremental fluid administration is associated with iatrogenic hemodilution and a paradoxical decrease in oxygen delivery. (mpo-mag.com)
- This pioneer study allows us to understand that iron supplementation may not be needed as any decrease is due to physiological haemodilution. (who.int)
Saline1
- Conclusions This study provides new insight into the effects of haemodilution by isotonic saline on clotting time (TGP), clot strength (G′GP) and clot microstructure (df). (cardiffmet.ac.uk)
Hypertension1
- the importance of treatment with calcium antagonists, hypervolaemic haemodilution, and induced arterial hypertension is discussed in light of the current literature. (nih.gov)
Fluid2
- In the study, Dr. Azriel Perel, Dr. Serban Bubenek, and colleagues at the Emergency Institute for Cardiovascular Diseases in Bucharest examined the effects of incremental fluid loading on oxygen delivery and on LabHb and SpHb as markers of possible iatrogenic hemodilution, which can necessitate blood transfusions that might otherwise be avoided. (mpo-mag.com)
- This is generally due to haemodilution from fluid resuscitation. (minivetguide.com)
Occur1
- However, one should note it can also occur as the result of haemodilution. (minivetguide.com)
Surgical1
- 14. [Normovolemic hemodilution during surgical revascularization of the myocardium]. (nih.gov)
Moderate1
- Note the moderate to marked haemodilution and overall low cellularity. (avd.asia)
Hemorrhage1
- 7. Johnson D, Agee S, Reed A, Gegel B, Burgert J, Gasko J, Loughren M. The effects of QuikClot Combat Gauze on hemorrhage control in the presence of hemodilution. (quikclot.com)
Cardiac1
- In Andeans with EE at 4,340 m, hemodilution lowered PVR in room air (2.9 ± 0.9 vs. 2.3 ± 0.8 wu, P = 0.03), but PASP remained unchanged (31.3 ± 6.7 vs. 30.9 ± 6.9 mmHg, P = 0.80) due to an increase in cardiac output. (cardiffmet.ac.uk)
Effect3
- We investigated the effect of progressive haemodilution on the dynamics of fibrin clot formation and clot microstructure using a novel rheological method. (cardiffmet.ac.uk)
- The changes concerning the plasmatic volume and hemodilution occurred in M1, confirming its immediate effect. (bvsalud.org)
- The generation and formation rates were based on the measured levels of activation markers, clearance rates and effect of hemodilution on marker levels. (houstonmethodist.org)
Results1
- Doppler ultrasound results of hemodilution treatment]. (dbcls.jp)
Surgery3
- The mean duration of the surgery in the hemodilution group was longer. (scielo.br)
- The number of levels submitted to surgery ranged from 7 to 16 in the hemodilution group, and from 4 to 13 in the control group. (scielo.br)
- It is common to have a mild anaemia post-surgery, due to a combination of blood loss and haemodilution. (minivetguide.com)
Volume3
- 9. [Gelatin for volume replacement in hemodilution: hemodynamic study]. (nih.gov)
- In hemodilution, blood is diverted from the body, replaced with a volume expander, and later returned to the patient. (kamna-lechnyr.cz)
- By focusing on a new attribute, the oxygenator system dynamic operating volume (DOV), the Inspire family minimizes the overall impact on hemodilution. (livanova.com)
Clinical1
- Minimizing hemodilution contributes to decreased blood transfusions and improved clinical outcomes during and after cardiopulmonary bypass (CPB). (livanova.com)
Mechanisms1
- 5. [The mechanisms of hemodynamic shifts in normovolemic hemodilution]. (nih.gov)
State1
- Haemodilution-induced profibrinolytic state is mitigated by fresh-frozen plasma: implications for early haemostatic intervention in massive haemorrhage. (edu.pl)
Alter1
- In contrast, after acclimation to 5,050 m, hemodilution did not significantly alter PASP (22.7 ± 5.2 vs. 24.5 ± 5.2 mmHg, P = 0.14) or PVR (2.2 ± 0.9 vs. 2.3 ± 1.2 wu, P = 0.77), although both remained sensitive to additional acute hypoxia. (cardiffmet.ac.uk)