Arterial blood and expired gas samples were taken from 20 patients before operation and on the first day after upper abdominal surgery. After operation the patients were studied breathing air and also breathing 35% oxygen from a venturi-type mask. Preoperative Pao2 with age was exaggerated by operation. Pao2 after operation was closely related to, and lower than, the preoperative value. The pos...

Long-term oxygen therapy prolongs life in adults with chronic hypoxia caused by chronic bronchitis and emphysema who have cor pulmonale, pulmonary hypertension, and secondary polycythemia ('blue bloaters'). Good results require oxygen therapy for more than 15 hours and preferably 20-24 hours per day. The oxygen concentrator, delivering 1 to 3 l/min of oxygen by nasal prongs, is probably the mos...

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When Joseph Priestley discovered oxygen in 1774, he found that air was a mixture of gases. He called one of these gases “dephlogisticated air,” to which later the chemist Antoine Lavoisier gave the name “oxygen” which made candles burn brighter and longer than ordinary air [1]. Until now, this discovery covers 2 essential features of oxygen which in clinical practice results in the use of oxyge...

Three cases of the neonatal respiratory distress syndrome are described. The babies were treated by prolonged oxygen given by intermittent positive pressure respiration after endotracheal intubation. Two of the infants died and at necropsy the lungs in both cases were consolidated. Both showed widespread haemorrhagic exudate and interstitial oedema. Early organization of the exudate was apparen...

Diabetic Ulcers Heal Faster With Hyperbaric Oxygen Diabetes is a disease that affects the small blood vessels in the tissues which results in wounds or ulcers that may last months to years. These wounds often develop from incidental injuries to the body and may become infected which can spread to the deeper tissues and the bones and may even require amputation. HBOT can help heal these wounds f...

OBJECTIVES To describe the clinical and laboratory characteristics of patients on long-term home oxygen therapy followed up by the home care program of Hospital das Clínicas, School of Medicine, Universidade de São Paulo, during a period of 8 years; to compare groups with and without secondary pulmonary hypertension; and to estimate the cost of the program using oxygen concentrators vs. oxygen ...

To the Editor: Previous studies of therapeutic oxygen in stroke have had conflicting results, and the latest study by Rusyniak et al1 seems to suggest that hyperbaric oxygen therapy (HBO) is harmful in ischemic stroke. The authors have already discussed how several inadequacies in trial design might explain their negative results. We wish to draw attention to additional features in their study ...

HIGH concentration oxygen therapy is often required after acute myocardial infarction, as hypoxia is common and may be resistant to oxygen therapy (MacKenzie et al., 1964; McNicol et al., 1965). While 100% oxygen is probably the treatment of choice, the apparatus for its administration, a tight-fitting face mask with valve box and reservoir or demand valve, is poorly tolerated and requires cons...