We demonstrate in vivo measurements in human retinal vessels of an experimental parameter, the slope of the low coherence interferometry (LCI) depth reflectivity profile, which strongly correlates with the real value of blood hematocrit. A novel instrument that combines two technologies, spectral domain low coherence interferometry (SDLCI) and retinal tracking, has been developed and used for t...

Blood Volume, Hematocrit and Pressure Relationships in the Isolated Perfused Dog Brain • The intracranial blood volume and hematocrit of the isolated perfused dog brain preparation were determined with Cr-labeIed erythrocytes. The intracranial blood volume was determined to be 8.6 ml/100 gm brain (SE±1.2 ml). Over the range of perfusing hematocrits studied, the relationship of perfusing hematoc...

This study reports the effect of increased hematocrit (packed cell volume) on the rate of decrease in plasma glucose during 6 h in blood specimens from seven newborns (cord blood) and heparin-treated blood specimens from eight adults. Mean hematocrits ranged frm 0.43 to 0.75 for the adults and from 0.51 to 0.81 for the infants. The decrease in glucose was related to time and to hematocrit. For ...

Polymorphonuclear neutrophil (PMN) extravasation/sequestration in the lung and a dysregulated inflammatory response characterize the pathogenesis of acute lung injury (ALI). Previously, we have shown that hemorrhage (Hem) serves to prime PMN such that subsequent septic challenge [cecal ligation and puncture (CLP)] produces a pathological, inflammatory response and consequent lung injury in mice...

To determine the direct effects of hematocrit on intestinal oxygen consumption and to determine whether an optimal hematocrit exists for intestinal oxygenation, we perfused isolated canine gut loops at a constant pressure (120 mm Hg) and varied hematocrit from 80% to 10%. As hematocrit fell, blood flow rose while arterial oxygen content fell. The regression of blood flow on hematocrit was linea...

The spectrum of vascular tumors ranges from hemangioma (HEM), to epithelioid hemangioendothelioma (EHE) and to angiosarcoma (AS). To the best of our knowledge, the usefulness of F-18 fluorodeoxyglucose positron emission tomography (FDG-PET) for vascular tumors has never been comprehensively studied. The present study investigated the usefulness of FDG-PET for pathologically diagnosed vascular t...

Methods Prospective, descriptive, observational study on a cohort of patients with severe trauma, that were admitted more than 72 hours in the ICU of Trauma and Emergency of a high complexity hospital, without active bleeding. November 2012 to January 2014. It was measured hemoglobin (hb), hematocrit (hct), plasma free hemoglobin (fhb) by HemoCue, bilirrubin and LDH before and after transfusion...

The aim of the study was to assess value and applicability multivariate tools for hematological plasma biochemical responses fish living in treated wastewater. Physicochemical water properties heavy metals concentration spring fall were used as determinants multiple stressors. Three methods data analysis (Agglomerative Hierarchical Clustering, Factor Analysis, Principal Component Analysis) one ...