title: Comparison of size of proximal gastric pouch and short-term weight loss following routine upper gastrointestinal contrast study after laparoscopic Roux-en-Y gastric bypass.
abstract: BACKGROUND
  The authors investigated whether there is any correlation between gastric pouch size measured by routine upper gastrointestinal contrast study (UGI) after laparoscopic Roux-en-Y gastric bypass (LRYGBP) and short-term weight loss.
  
  
  METHODS
  The study group consisted of 82 patients (66F, 16M) who underwent LRYGBP. Body mass index before surgery ranged from 35.4 to 71.7 kg/m2, with a mean of 47.4 kg/m2. UGI was performed 1 day after LRYGBP in all patients. Proximal gastric pouch size was estimated by multiplying maximal transverse and longitudinal diameters on AP spot image or film. Percent excess weight loss (%EWL) obtained at 3, 6, 12 and 24 months after surgery was used as an indicator of short-term results. According to the presence of contrast passage through the gastrojejunostomy, each patient was classified into 2 groups: Group A, negative; Group B, positive.
  
  
  RESULTS
  There was no correlation between proximal gastric pouch size and %EWL at any point of time (P>0.05). The correlation coefficients calculated for 3, 6, 12 and 24 months after surgery were 0.038, 0.110, 0.015 and 0.042, respectively (Pearson correlation test). The gastric pouch size of Group A was larger than that of Group B (Student t-test, P<0.001). There was no difference in %EWL between Groups A and B at 3 and 6 months after surgery (P>0.05).
  
  
  CONCLUSIONS
  Pouch size area, measured by routine UGI study on the first postoperative day, does not influence short-term postoperative weight loss.
authors: Department of Radiology, University of Iowa Carver College of Medicine, Iowa City, IA 52242-1077, USA. anishie@radiol.med.kyushu-u.ac.jp
authors: Akihiro
authors: A
authors: Nishie
authors: Bruce
authors: B
authors: Brown
authors: Thomas
authors: T
authors: Barloon
authors: David
authors: D
authors: Kuehn
authors: Isaac
authors: I
authors: Samuel
mesh_terms: D000328:Adult; D003287:Contrast Media; D005260:Female; D015390:Gastric Bypass / Q000379:methods*; D006801:Humans; D010535:Laparoscopy; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000601:surgery*; D009929:Organ Size; D011859:Radiography; D013270:Stomach / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D013997:Time Factors; D015431:Weight Loss
chemical_list: D003287:Contrast Media