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Value of deep breaths in reversing postoperative hypoxemia
Ravin MB
New York State Journal of Medicine 1966 Jan 15;66(2):244-249
clinical trial
3/10 [Eligibility criteria: No; Random allocation: Yes; Concealed allocation: No; Baseline comparability: No; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

Twenty patients were studied following operation. After an average of one hundred ten minutes of assisted ventilation plus five minutes of spontaneous oxygen, all subjects had arterial saturations of 100% and arterial carbon dioxide tension and pH values within the normal range. Five consecutive hyperinflations one hour after the end of anesthesia resulted in a mean arterial oxygen saturation that was significanlty greater than in the control group, and the difference remained significant after eight to ten hours.

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