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Postoperative pulmonary complications in upper abdominal surgery. A randomized clinical comparison between physiotherapy and blow-bottles
Heisterberg L, Johansen TS, Larsen HW, Holm M, Andersen B
Acta Chirurgica Scandinavica 1979;145(8):505-507
clinical trial
5/10 [Eligibility criteria: No; Random allocation: Yes; Concealed allocation: No; Baseline comparability: No; Blind subjects: No; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: Yes; 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*

Blow-bottles were compared with conventional postoperative pulmonary physiotherapy in a randomized trial of 98 patients undergoing gastric or biliary tract surgery. Radiological evidence of postoperative pulmonary lesions found by "blind" evaluation of the films occurred with the same frequency in the two groups (30.6%). Blow-bottles were found preferable to physiotherapy because they are less time-consuming.

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