title: Silastic ring gastric bypass: a comparison of two ring sizes: a preliminary report.
abstract: BACKGROUND
  The silastic ring (vertical) gastric bypass (SRGB) was introduced by Fobi in 1989, in an effort to combine the advantages of the Roux-en-Y gastric bypass with those of the VBG, while avoiding disadvantages of each. We remain unsure of the ideal ring size.
  
  
  METHODS
  Sixty-four patients having SRGB between June 1990 and September 1994 had a 5.5 cm ring placed and 24 patients operated between October 1994 and September 1995 had a 6.0 cm ring placed. Weight loss and quality of eating data is compared 12 months after surgery.
  
  
  RESULTS
  Median preoperative per cent excess weight was 113 (range 76-209) in the 5.5 cm group and 106 (range 79-196) in the 6.0 cm group. Weight loss was equivalent at 12 months, with median percent excess weight of 33 (range 8-109) and 27 (range 6-81) in the two groups respectively. Quality of eating data appears better in those with the larger ring size. Nine patients with a 5.5 cm ring have subsequently had their ring removed to improve their quality of eating and a further six may require this in the future. One patient with a 6.0 cm ring has had the ring removed and two others may require this be done.
  
  
  CONCLUSIONS
  An SRGB with a 6.0 cm ring achieves equivalent weight loss to one with a 5.5 cm ring, but with better quality of eating, and less prospect of requiring ring removal. However, there remains a small proportion of patients in whom a 6.0 cm ring is poorly tolerated. For this reason a 6.5 cm ring should be tested.
authors.affiliation: Wakefield Gastroenterology Centre, Wakefield Hospital, Wellington, New Zealand.
authors.forename: N A
authors.initials: NA
authors.lastname: Crampton
authors.forename: V
authors.initials: V
authors.lastname: Izvornikov
authors.forename: R S
authors.initials: RS
authors.lastname: Stubbs
mesh_terms: D000328:Adult; D000713:Anastomosis, Roux-en-Y; D001835:Body Weight; D004435:Eating / Q000502:physiology; D004867:Equipment Design; D005260:Female; D005500:Follow-Up Studies; D005502:Food; D015390:Gastric Bypass / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods; D005764:Gastroesophageal Reflux / Q000209:etiology; D015391:Gastroplasty; D006801:Humans; D008297:Male; D008875:Middle Aged; D012086:Reoperation; D012826:Silicone Elastomers; D016896:Treatment Outcome; D014839:Vomiting / Q000209:etiology; D015431:Weight Loss
chemical_list: D012826:Silicone Elastomers