title: Radiographic changes after colonoscopic decompression for acute pseudo-obstruction.
abstract: OBJECTIVE
  Colonoscopy has been the principal tool for decompression in acute colonic pseudo-obstruction, known as Ogilvie's syndrome. The objectives of this study were to determine the immediate effect of colonoscopy on the cecal diameter (measured on supine radiographs) and to delineate possible correlations in the diameters of dilated segments of the colon.
  
  
  METHODS
  The charts and radiographs of 24 patients who had colonoscopic decompression for acute colonic pseudo-obstruction between 1992 and 1997 at the San Diego Veterans Affairs Medical Center and the University of California, San Diego Hospitals were reviewed. We measured cecal, transverse, descending, and sigmoid colon diameters on serial radiographs up to the point of clinical resolution.
  
  
  RESULTS
  Mean +/- standard deviation cecal diameter change (between initial and post-decompression films) was -2+/-3.4 cm at four hours and -2.2+/-3.3 cm one day after decompression. On the daily radiographs between colonoscopic decompression and clinical resolution, there was a close correlation between the diameter of the cecum and that of the transverse colon (P<0.05). There was no correlation between the cecal diameter and that of the descending or sigmoid colon.
  
  
  CONCLUSIONS
  Colonoscopic decompression only causes a small decrease in cecal size in the patient with acute colonic pseudo-obstruction. Dilation patterns of the cecum and transverse colon are significantly correlated in acute colonic pseudo-obstruction. This correlation provides additional support to the contention that the same pathophysiology affects these two segments of the colon.
authors.affiliation: Department of Surgery, San Diego Veterans Affairs Healthcare System and University of California, USA.
authors.forename: T N
authors.initials: TN
authors.lastname: Pham
authors.forename: B C
authors.initials: BC
authors.lastname: Cosman
authors.forename: P
authors.initials: P
authors.lastname: Chu
authors.forename: T J
authors.initials: TJ
authors.lastname: Savides
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002432:Cecum / Q000000981:diagnostic imaging; D003106:Colon / Q000000981:diagnostic imaging*; D012809:Colon, Sigmoid / Q000000981:diagnostic imaging; D003112:Colonic Pseudo-Obstruction / Q000601:surgery*; D003113:Colonoscopy; D019299:Decompression, Surgical; D004108:Dilatation, Pathologic / Q000000981:diagnostic imaging / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D016683:Supine Position; D015996:Survival Rate