Arterial hypoxemia is a common finding in acute pulmonary embolism, and its severity is generally assumed to be proportional to the extent of pulmonary artery obstruction. We studied blood gases (during room air breathing and 100% oxygen breathing) and hemodynamic data is seven patients with massive pulmonary embolism and circulatory failure. All measurements were made before and 30 minutes aft...

Methods: Male Sprague-Dawley rats were anesthetized, intubated, and artificially ventilated while blood gases and body temperature were maintained at physiologic levels. Arterial pressure, heart rate and temperature and in some cases, CBF were monitored. The forehead skin selectively was continuously selectively cooled or electrically stimulated for one hour. Middle cerebral artery was permanen...

A 48-yr-old male presented with cyanosis and dyspnoea at minimal exertion. Over the last year he had been complaining of progressively increasing exertional dyspnoea, and during this time was hospitalized twice for pneumonia. His medical problems started 5 yrs ago when after an episode of haematemesis, cryptogenic hepatic cirrhosis with portal hypertension was diagnosed. He subsequently underwe...

the purpose of this study was to investigate the potential responses of the cardiovascular system and regional blood flow to hypoxic hypoxia (bb) and to carbon monoxide (co)-induced hypoxia (coh). ten anesthetized cats were studied under two nonnoxic (control: cont) and two hypoxic conditions. four types of radioactive micro spheres were used to measure regional blood flow during cont and two h...

Previous studies have shown that some patients with chronic obstructive lung disease and hypercapnia will respond to medroxyprogesterone with improvement in arterial blood gases. The exact mechanism of this effect is unclear but it is presumed to be a result of ventilatory stimulation. To determine whether the ability to correct arterial blood gas abnormalities by voluntary hyperventilation wou...