title: Pulmonary atelectasis following upper urinary tract surgery on patients in the 25 degrees and 45 degrees 'jack-knife' position. A sequential analysis.
abstract: The development of pulmonary atelectasis following upper urinary tract surgery in patients positioned either in the 25 degrees or the 45 degrees 'jack-knife' position was evaluated in a randomized clinical trial with sequential analysis. Atelectasis was diagnosed from chest radiographs and/or from a decrease in arterial oxygen tension during the first three postoperative days. 32.1% of 78 patients developed atelectasis, but no statistically significant differences was found between the two positions.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002986:Clinical Trials as Topic; D006801:Humans; D007669:Kidney Calculi / Q000601:surgery; D007674:Kidney Diseases / Q000601:surgery*; D008875:Middle Aged; D009392:Nephrectomy; D011183:Postoperative Complications / Q000517:prevention & control; D011187:Posture; D001261:Pulmonary Atelectasis / Q000209:etiology* / Q000517:prevention & control; D014513:Ureter / Q000601:surgery