Cyanate and 2,3-diphosphoglycerate (2,3-DPG) both influence the oxygen affinity of hemoglobin. The studies presented here concern the effects of these compounds on the sickling phenomenon. The inhibitory effect of cyanate on sickling is largely due to the fact that it increases the percentage of oxyhemoglobin S at a given oxygen tension. In addition, cyanate inhibits sickling by a mechanism tha...

AIM To determine if oxygen saturation in retinal vessels depends on the degree of diabetic retinopathy. MATERIAL AND METHODS A prospective study comparing values of oxygen saturation in retinal arteries, veins, and arterio - venous (A-V) difference in healthy persons and in patients with diagnosed diabetes. The study included 114 eyes of 76 patients with diagnosed diabetes, and 57 eyes of 57 ...

=Abstract=Pulse oximetry has recently been introduced as a method for continuous and non-invasive transcutaneous monitoring of arterial oxygen saturation in neonates. The purpose of our study was to determine the reliability, accuracy, and practicability of pulse oximetry for monitoring arterial oxygenation in sick newborn infants. Pulse oximetry oxygen saturation values (SpO2) were compared wi...

BACKGROUND There is a well known relationship between hypoperfusion and postoperative complications like anastomotic leak. No studies have been done addressing this relationship in the context of abdominal trauma surgery. Central venous oxygen saturation is an important hypoperfusion marker of potential use in abdominal trauma surgery for identifying the risk of anastomotic leak development. Th...

Background: The vascular response to recurrent tissue hypoxia and reperfusion following red blood cell sickling causes acute chest syndrome and chronic lung disease. The purpose of this study was to determine the pattern of chronic lung lesions and possible risk factors in sickle cell patients in lagos, Nigeria.Methods: From July 2012 to April 2013, Pulmonary function test (PFT) and chest-x-ray...

Introduction It is accepted that the BOLD fMRI signal results from changes in the amount and saturation of hemoglobin in a voxel that stem from neurophysiological changes in CBF, CBV and CMRO2 with brain activation. This sensitivity of BOLD fMRI to CMRO2 has been used to quantify the changes in CMRO2 with brain activation (1,2,3). In general, this physiological parameter has been of interest be...

Near-infrared imaging was used to quantify typical values of hemoglobin concentration, oxygen saturation, water fraction, scattering power, and scattering amplitude within the breast tissue of volunteer subjects. A systematic study of the menstrual variations in these parameters was carried out by measuring a group of seven premenopausal normal women (aged 41 to 47 years) in the follicular (day...

Clinical studies show that patients with liver cirrhosis associated with portal hypertension have a high incidence of duodenal ulcer and duodenitis. However, little information is available concerning pathophysiological process of such duodenal diseases in liver cirrhosis. Hemodynamics of the duodenal mucosa was studied in cirrhotics with esophageal varices (68 cases) and in noncirrhotics with ...

The advent of functional MRI in the mid-1990s has catalyzed progress pertaining to scientific discoveries in neuroscience. With the prospect of elucidating the physiological aspect of the Blood Oxygenation Level Dependent (BOLD) effect we present a computational capillary-tissue system capable of mapping venous hemoglobin saturation- a marker of the BOLD hemodynamic response. Free and facilitat...