Aims: This study examined the effects of exposure to mild hyperbaric oxygen on blood flow and resting energy expenditure. Study Design: Clinical study. Methods: Fourteen healthy women were exposed to mild hyperbaric conditions at 1.25 atmospheres absolute with 36.0% oxygen for 50 min. Their heart rate, peripheral oxygen saturation, blood flow, resting energy expenditure, derived-reactive oxygen...

OBJECTIVE To compare pH and PCO2 values of simultaneously obtained arterial, arterialized capillary, and venous blood samples and also to compare oxygen saturation (ASaO2) measured in arterial blood and oxygen saturation by pulse oximetry (PSaO2). METHODS Prospective study was done in the children admitted in the Pediatric Intensive Care Unit of Christian Medical College Hospital Vellore, req...

background: various studies are seeking to find new methods to improve techniques of laryngeal mask airway (lma) insertion and reduce possible complications. in this study, we embarked on a clinical study to investigate the advantages of a new insertion method of laryngeal mask and to compare it with the classic method. materials and methods: two hundred patients aged 20-60 years old in 2012 we...

Patients with sickle cell disease usually have mild hypoxaemia and their oxyhaemoglobin dissociation curve is shifted to the right. It follows that oxygen saturation in sickle cell disease should be lower than normal. Most subjects in this clinic had normal oxygen saturation by pulse oximetry, however. To improve the understanding of this paradox, arterialised capillary oxygen tension (PO2) and...

The effects of naratriptan, rizatriptan, and sumatriptan on arteriovenous oxygen saturation difference and carotid hemodynamics were compared in the anesthetized pig. Oxygen and carbon dioxide partial pressures in systemic arterial and jugular venous blood as well as hemoglobin oxygen saturation were determined by conventional blood gas analysis. Vehicle (n = 19) or naratriptan, rizatriptan, or...

PURPOSE This preclinical study aimed to evaluate placental oxygenation in pregnant rats by real-time photoacoustic (PA) imaging on different days of gestation and to specify variations in placental oxygen saturation under conditions of maternal hypoxia and hyperoxygenation. MATERIAL AND METHODS Placentas of fifteen Sprague-Dawley rats were examined on days 14, 17, and 20 of pregnancy with a P...

Introduction: Functional MRI has been extensively used to indirectly measure changes in neuronal activation via the BOLD (blood oxygenation level dependent) effect. While BOLD fMRI provides a relative signal that fluctuates based on changes in venous oxygenation, the absolute value of venous oxygen saturation at baseline and during activation is unknown. Additionally, the BOLD response is highl...

The regulation of oxygen supply and consumption by the brain is a complex and dynamic process. The determination of the oxygen saturation of venous blood is an indirect means to assess local tissue oxygen saturation. Quantitatively measuring oxygen saturation is important to characterize the physiological or pathological state of tissue function. Noninvasive and reliable measurements can help t...