Obesity Surgery

, Volume 17, Issue 9, pp 1183–1188 | Cite as

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

  • Akihiro Nishie
  • Bruce Brown
  • Thomas Barloon
  • David Kuehn
  • Isaac Samuel
Research Articles


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 (Studentt-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).

Conclusion: Pouch size area, measured by routine UGI study on the first postoperative day, does not influence short-term postoperative weight loss.

Key words

Morbid obesity gastric bypass Roux-en-Y upper gastrointestinal contrast study fluoroscopy pouch size 


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Copyright information

© Springer 2007

Authors and Affiliations

  • Akihiro Nishie
    • 1
  • Bruce Brown
    • 1
  • Thomas Barloon
    • 1
  • David Kuehn
    • 1
  • Isaac Samuel
    • 2
  1. 1.Department of RadiologyUniversity of Iowa Carver College of MedicineIowa CityUSA
  2. 2.Department of SurgeryUniversity of Iowa Carver College of MedicineIowa CityUSA

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