Introduction: Cataract surgery is a common surgery, especially among the elderly, and the choice of anesthesia medications is critical in such patients. In this study, the effects of midazolam, propofol, and dexmedetomidine were investigated for sedation in patients undergoing cataract surgery under local anesthesia. Method: Ninety patients were included in this study and underwent cataract su...

An anatomically realistic model for oxygen transport in cardiac tissue is introduced for analyzing data measured from isolated perfused guinea pig hearts. The model is constructed to match the microvascular anatomy of cardiac tissue based on available morphometric data. Transport in the three-dimensional system (divided into distinct microvascular, interstitial, and parenchymal spaces) is simul...

OBJECTIVES This study attempted to provide a formula for calculation of the pulmonary/systemic flow ratio in children after bidirectional cavopulmonary anastomosis. BACKGROUND With the bidirectional cavopulmonary anastomosis, only the superior vena cava blood is oxygenated by the lungs. The inferior vena cava flow recirculates into the systemic circulation. The ratio of these flows will deter...

Pulse oximeters are widely used for noninvasive monitoring of oxygen saturation in arterial blood hemoglobin. We present a transmittance pulse oximetry system based on near-infrared (NIR) laser diodes (750 and 850 nm) for monitoring oxygen saturation of arterial blood hemoglobin. The pulse oximetry system is made up of the optical sensor, sensor electronics, and processing block. Also, we show ...

a periodic increase in blood pressure (bp) occurs during apneic episodes in patients with obstructive sleep apnea (osa). several factors including hypoxemia and an increase in heart rate (hr) were reported to be responsible for this increased bp. to examine the contribution of these two factors in increasing bp, 35 healthy male subjects (mean age±sd= 23.64±3.80) were studied in three experiment...

The metabolism, as measured by oxygen consumption, of organs in situ is being increasingly investigated by the vascular catheterization technique (see Drabkin (3) for pertinent literature). The oxygen consumption is derived from the arteriovenous difference in the oxygen saturation or percentage of oxyhemoglobin (4) of blood entering and leaving the tissue. Such work has pointed to the need of ...

She was diagnosed as having bronchitis and was given intravenous cefuroxime and gentaAbstract micin with improvement. However, on the Patients with acute leukaemia may have second day she complained of an irritating dry spuriously low arterial oxygen tensions cough and dyspnoea. Physical examination of (PaO2). The markedly increased numbers the respiratory and cardiovascular systems reof white ...