[Changes of epidural pressure and cerebrospinal fluid pressure during abdominal surgery].
D000005:Abdomen / Q000601:surgery*; D000368:Aged; D000767:Anesthesia, Epidural; D000768:Anesthesia, General; D001794:Blood Pressure; D004824:Epidural Space; D005260:Female; D005743:Gastrectomy; D006801:Humans; D007427:Intracranial Pressure; D008297:Male; D008875:Middle Aged