نتایج جستجو برای: intraoperative hypoxemia
تعداد نتایج: 33899 فیلتر نتایج به سال:
Obstructive sleep apnea leads to chronic intermittent hypoxia (CIH) and is associated with atherosclerosis. We have previously shown that C57BL/6J mice exposed to CIH and a high-cholesterol diet develop dyslipidemia, atherosclerosis of the aorta, and upregulation of a hepatic enzyme of lipoprotein secretion, stearoyl coenzyme A desaturase 1 (SCD-1). We hypothesized that (1) SCD-1 deficiency wil...
The aim of this study is to find causes of cardiac disrhytmias during ophthalmic surgeries in patients under general anesthesia with no history of heart disease in Iran’s educational hospitals. This was a univarient study. A sample of 250 patients selected randomly. Data were gathered by four resources: interview, patient’s documents, kind of treatment selected by anesthesiologist and monitor...
Background and objectives: Intraoperative blood transfusion is a common medical intervention worldwide. Although mostly lifesaving when indicated, inappropriate administration of intraoperative can be potentially life-threatening. The aim of this study was to analyze the most common surgery/invasive procedures requiring intraoperative transfusion and to determine indications for intraoperative...
BACKGROUND The authors evaluated the ability of visible light spectroscopy (VLS) oximetry to detect hypoxemia and ischemia in human and animal subjects. Unlike near-infrared spectroscopy or pulse oximetry (SpO2), VLS tissue oximetry uses shallow-penetrating visible light to measure microvascular hemoglobin oxygen saturation (StO2) in small, thin tissue volumes. METHODS In pigs, StO2 was measu...
Hypoxemia is the most common adverse event that happened during gastrointestinal endoscopy. To estimate risk of hypoxemia prior to endoscopy, American Society of Anesthesiology (ASA) classification scores were used as a major predictive factor. But the accuracy of ASA scores for predicting hypoxemia incidence was doubted here, considering that the classification system ignores much information ...
background rhinoplasty is one of the most common surgeries of the plastic surgery and as well as ear, throat and nose. intra-operative bleeding during surgery is one of the most important factors that may impair the surgeon’s job. providing a clean blood-free surgical filed makes the operation faster, easier and with a better quality. one way to achieve this goal is to induce hypotension. this ...
Changes in diastolic chamber distensibility (DCD) during hypoxemia and ischemia were studied in isolated-buffer-perfused rabbit hearts. Two minutes of hypoxemia (low PO2 coronary flow) resulted in a shift of the diastolic pressure-volume curve to the left, i.e., distensibility was decreased (hypoxemic contracture). In contrast, 2 minutes of ischemia (zero coronary flow) resulted in an initial s...
BackgroundNifedipine is a widely used drug in pregnancies complicated by maternal hypertensive disorders that can be associated with placental insufficiency and fetal hypoxemia. The evidence regarding myocardial responses to nifedipine hypoxemia limited.ObjectiveWe hypothesized would not impair sheep cardiac function under hypoxemic environment. In particular, we investigated the effects of on ...
The effects of hypoxia on lung and airway mechanics remain controversial, possibly because of the confounding effects of competing reflexes caused by systemic hypoxemia. We compared the effects of systemic hypoxemia with those of unilateral alveolar hypoxia (with systemic normoxemia) on unilateral respiratory system impedance (Z) in intact, anesthetized dogs. Independent lung ventilation was ob...
The fetal llama responds to hypoxemia, with a marked peripheral vasoconstriction but, unlike the sheep, with little or no increase in cerebral blood flow. We tested the hypothesis that the role of nitric oxide (NO) may be increased during hypoxemia in this species, to counterbalance a strong vasoconstrictor effect. Ten fetal llamas were operated under general anesthesia. Mean arterial pressure ...
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