The aggregation, dispersion and deformation of cellular components of blood in the vasculature affect blood rheology to a greater extent. At low shear rate erythrocytes tend to aggregate and form rouleaux and at a high shear rate they dis perse and get deformed into ellipsoid with their long axis aligned in the flow direction. While rouleaux formations increase viscosity, dispersion and deforma...

BACKGROUND: Less is known about the influence of hematocrit detection methodology on transfusion triggers. Therefore, the aim of the present study was to compare two different hematocrit-assessing methods. In a total of 50 critically ill patients hematocrit was analyzed using (1) blood gas analyzer (ABLflex 800) and (2) the central laboratory method (ADVIA(R) 2120) and compared. FINDINGS: Bland...

background: physicians in islamic countries believe that fasting in ramadan is equal to ingestion of thirty pills regularly ingested every year for clearing the blood and fortifying the tissues. the effects of islamic fasting on physiologic functions in normal conditions have been considered in different studies and different topics. this study was to determine the quantitative changes of hemog...

BACKGROUND Venous thromboembolism (VTE) is a multicausal disease which recurs. Hematocrit is associated with a thrombotic risk. We aimed to investigate if hematocrit is associated with the recurrence risk. METHODS Patients with a first VTE were followed after anticoagulation. Patients with VTE provoked by a transient risk factor, natural inhibitor deficiency, lupus anticoagulant, homozygous o...

The evolution of building codes typically produce design provisions that are expected to create safer and more accurate designs. We as engineers expect building codes to advance the state of the art with each successive edition. The 2009 International Building Code (IBC) and the Building Code Requirements for Structural Concrete (ACI 318-08) have significant revisions affecting the design of ti...

Background: Preoperative hematocrit estimation has been one of the basic routine requirements before an anaesthetic is administered. Non availability of hematocrit result or a value less than 30% often led to cancellation of an elective surgery by the anaesthetist. Objective: The aim of the study was to determine the prevalence of anemia among adult patients presenting for day case surgery in t...

BACKGROUND The patient characteristics and mortality associated with autosomal dominant polycystic kidney disease (PKD) have not been characterized for a national sample of end stage renal disease (ESRD) patients on the renal transplant waiting list. METHODS 40,493 patients in the United States Renal Data System who were initiated on ESRD therapy between 1 April 1995 and 29 June 1999 and late...

An interesting problem in hemorheology is to calculate that volume fraction of erythrocytes (hematocrit) that is optimal for transporting a maximum amount of oxygen. If the hematocrit is too low, too few erythrocytes are present to transport oxygen. If it is too high, the blood is very viscous and cannot flow quickly, so that oxygen supply to the tissues is again reduced. These considerations a...