Respiratory function testing of surgical patients with the de Bono whistle.
D000005:Abdomen; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D011183:Postoperative Complications / Q000175:diagnosis*; D012119:Respiration; D012129:Respiratory Function Tests; D012140:Respiratory Tract Diseases / Q000175:diagnosis*; D013514:Surgical Procedures, Operative