title: The effect of upper abdominal surgery on the relationship of airway closing point to end tidal position.
mesh_terms: D000005:Abdomen / Q000601:surgery*; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D000860:Hypoxia / Q000209:etiology; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood; D011868:Radioisotopes; D012119:Respiration; D012143:Respiratory Physiological Phenomena; D013147:Spirometry; D014978:Xenon
chemical_list: D011868:Radioisotopes; D014978:Xenon; D010100:Oxygen