Postoperative pulmonary complications.
D000005:Abdomen / Q000601:surgery; D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008487:Medical History Taking; D008875:Middle Aged; D011175:Positive-Pressure Respiration; D011183:Postoperative Complications; D001261:Pulmonary Atelectasis / Q000209:etiology* / Q000517:prevention & control; D013147:Spirometry