Vaughan R W, Wise L
Ann Surg. 1975 Dec;182(6):705-9. doi: 10.1097/00000658-197512000-00008.
The effect of position change on blood gas exchange was studied in 22 markedly obese, otherwise healthy, women both preoperatively and postoperatively. There was a statistically significant decrease in arterial oxygen tension and a simultaneous reduction both in the arterial carbon dioxide tension and the base excess with the assumption of the supine versus the semirecumbent position on postoperative days one and two. However, no positional difference was demonstrable in any variable by the third postoperative day. This study indicates that in obese patients during the first 48 hours after abdominal surgery, assumption and maintenance of the semirecumbent posture is a valuable therapeutic adjunct to improve arterial oxygenation.
在22名明显肥胖但其他方面健康的女性患者术前和术后研究了体位改变对血气交换的影响。在术后第1天和第2天，由仰卧位改为半卧位时，动脉血氧张力有统计学意义的降低，同时动脉血二氧化碳张力和碱剩余也降低。然而，到术后第3天，任何变量均未显示出体位差异。本研究表明，腹部手术后的头48小时内，肥胖患者采用并维持半卧位姿势是改善动脉氧合的一项有价值的治疗辅助措施。
