title: Gas volume analysis and postoperative bowel functional disorders in patients who received anterior resection for rectal cancer.
abstract: OBJECTIVE
  Colon gas analysis using abdominal radiography has been reported as a reliable method for assessing functional bowel disorders. The aim of this study was to clarify the relevance of colon gas distribution in postoperative disorders such as constipation and feelings of incomplete evacuation following rectal cancer operation.
  
  
  METHODS
  Colon gas volume score was calculated using plain abdominal radiographs and evaluated in 50 patients who had received low anterior resections. Twenty-one constipated patients who required laxatives and 29 patients who did not were compared in terms of colon gas distribution. In addition, 32 patients with postoperative feelings of incomplete evacuation and 18 patients without such feelings were assessed in similar fashion.
  
  
  RESULTS
  Left colon gas scores in patients who required laxatives were significantly higher (2.82 +/- 3.23 percent) than in nonusers (1.21 +/- 0.96 percent; P < 0.01). Patients with feelings of incomplete evacuation displayed significantly higher left side colon gas scores (2.51 +/- 2.66 percent) than those without such feelings (0.77 +/- 0.81 percent; P < 0.0001).
  
  
  CONCLUSIONS
  Patients with postoperative functional bowel disorders such as constipation or feelings of incomplete evacuation may experience relatively high volumes of gas in the left colon.
authors.affiliation: Department of General Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Seike
authors.forename: Keiji
authors.initials: K
authors.lastname: Koda
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Takiguchi
authors.forename: Kenji
authors.initials: K
authors.lastname: Oda
authors.forename: Masaru
authors.initials: M
authors.lastname: Miyazaki
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003082:Colectomy / Q000009:adverse effects*; D005260:Female; D005740:Gases; D006801:Humans; D007410:Intestinal Diseases / Q000000981:diagnostic imaging / Q000209:etiology* / Q000503:physiopathology; D007422:Intestines / Q000502:physiology*; D008297:Male; D011183:Postoperative Complications; D011860:Radiography, Abdominal; D012004:Rectal Neoplasms / Q000601:surgery*; D015203:Reproducibility of Results
chemical_list: D005740:Gases