Near-infrared spectroscopy (NIRS) is a noninvasive optical technique to monitor cerebral oxygen saturation at the bedside. Despite its applicability, NIRS has had limited clinical use because of concerns about accuracy, noted by intersubject variability in slope and intercept of the line between NIRS- and weighted-average arterial-cerebrovenous saturation (SMO2). This study evaluated transcrani...

this study was conducted to determining the gpx, hemoglobin concentration (hb) and hematocrite percentage (hct) in blood samples of young ewes were gathered at different places of zagheh salman pastures in qom province. 15 blood samples were gathered through 8 flocks during autumn, winter and spring seasons randomly. at first the measures of gpx, hb and hct were determined and then gpx concentr...

We determined whether addition of hemoglobin to the plasma would inhibit endothelial-dependent dilation in brain where tight endothelial junctions limit hemoglobin extravasation. Pial arteriolar diameter was measured by intravital microscopy through closed cranial windows in anesthetized cats either without transfusion (hematocrit = 32%) or after exchange transfusion with an albumin or sebacyl-...

An Allen correction and a polychromatic analysis are about equally effective in minimizing effects of interference by bilirubin and triglyceride turbidity in the direct spectrophotometry of serum hemoglobin: interference from bilirubin is nearly eliminated, that from turbidity substantially decreased. The limit of detectability of hemoglobin is 8 mg/L in the presence of a moderate concentration...

The increased hemoglobin concentration in high-altitude dwellers is a double-edged sword. Increasing hemoglobin concentration is a response long considered to be a beneficial adaptation, whereby an increase in the oxygen-carrying capacity of the blood compensates for the arterial hypoxemia of altitude. Without such an adaptation, maintenance of the arterial oxygen delivery to the tissues would ...

CONTEXT High and low maternal hemoglobin concentrations during pregnancy have been reported to increase risk of small-for-gestational-age (SGA) birth, which is a predictor of stillbirth. The relationship between hemoglobin concentration during pregnancy and risk of stillbirth is unclear. OBJECTIVE To study the associations among hemoglobin concentration at first measurement during antenatal c...

The current manuscript describes a high throughput assay designed to identify organic compounds with potential inhibitory effects on sickle hemoglobin polymerization. The assay is fast, economic and reproducible. In just 20-minutes, a test compound can be screened for anti-polymerization activity at five different concentrations; each in quadruple; using as little as 10 mg of purified sickle he...

in a survey of 148 subjects (72 females and 76 males) in 3 villages and one city in isfahan province, plasma vitamin a, hemoglobin concentration and hematocrit were determined in all subjects, and serum iron was measured in 19 persons, in order to investigate the possible relationship between vitamin a and hematopoietic factors. a positive correlation existed between plasma vitamin a and hemogl...

Height is reported to be inversely associated with cardiovascular disease. And platelets play an important role in vascular remodeling by supporting CD34-positive cells. To clarify the association between height and platelet, we conducted a cross-sectional study of 219 elderly Japanese men. Since hemoglobin concentration is influenced by vascular remodeling activity, an analysis stratified by h...