Clinical trial NCT02601092: Laparoscopic Roux-en-Y Gastric Bypass Versus Laparoscopic Mini Gastric Bypass
Official title: Laparoscopic Roux-en-Y Gastric Bypass Versus Laparoscopic Mini Gastric Bypass: A Randomized Controlled Trial
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Obesity
Bypass Complications
Keywords: Mini Gastric Bypass
Roux-en-Y Gastric Bypass
RCT
Lead sponsor: Spital Limmattal Schlieren
Sponsor class: OTHER
First posted: 2015-11-10
Enrollment: 80
Sex: ALL
Minimum age (years): 18
Maximum age (years): 65
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: Several retrospective studies have shown same efficiency in regard to weight loss, with a lower rate of complications for the laparoscopic mini gastric bypass (LMGB) compared to Roux-en-Y gastric bypass (LRYGB). The aim of this double-blinded randomized controlled trial is to compare the two procedures in respect of excess weight loss, complications, operation time, length of stay and the metabolic impact on the hormonal brain-gut-axis.

Detailed description: Bariatric surgery, the only effective treatment for morbid obesity, has shown effective long term weight loss and good control of obesity related comorbidities in randomized controlled trials.

Obesity related diseases, such as hypertension, type 2 diabetes, dyslipidemia, osteoarthritis and various tumours, have a significant socio-economic impact, since the cost of the obesity epidemic is 5.7 billion Swiss francs yearly.

According to the current Swiss National Guidelines defined by the Swiss Group for Morbid Obesity surgical therapy is indicated in cases of BMI 35 kg/m2 or higher, showing better weight reduction and control of comorbidties than conservative therapy alone. Obesity reduces quality of life and life expectancy dramatically. Furthermore it has a significant impact on our economy. Bariatric surgery is likely to improve all of these negative impacts on society.

The most commonly performed procedures at present are laparoscopic adjustable gastric banding, laparoscopic Roux-en-Y gastric bypass (LRYGB) and laparoscopic sleeve gastrectomy (LSG).

LRYGB is considered the golden standard in bariatric surgery, although little evidence is available to justify this standpoint. In fact, the choice of the surgical procedure depends more on patient factors such as present comorbidities and operative risk. Therefore, surgeons consult after a work up within a multidisciplinary team of caretakers such as nutritionists, endocrinologists and psychiatrists and chose a patient tailored approach. Recently, the laparoscopic mini gastric bypass (LMGB) has gained worldwide popularity in addition to the standard available procedures for the treatment of morbid obesity. Therefore, it has been added by the Swiss Group for Morbid Obesity as a surgical option, which has to be evaluated in clinical trials.

Robert Rutledge, the pioneer of the LMGB, published in 2001 results of 1274 patients, who received surgical treatment with LMGB. After two years the patients showed an excess weight loss (EWL) of 77%. The rate of anastomotic leakage in the gastroenterostomy amounted 1.6%. The rate of mortality was 0.08%. Subsequently, Rutledge published in 2005 the results of 2410 patients with a follow up of 38.7 months. These cohort reached/achieved an EWL of 80% after a year and even after 5 years 5% of all these patients showed a weight rebound of maximum 10 kg. In fact, those results seemed superior to outcomes of the other standard bariatric procedures.

The rate of anastomotic leakage was 1.08%, mortality 0.08%. Long-term complications were ulcer disease (4%) and iron deficiency (5%). Both complications are also known in LRYGB with similar rates.

The first and only randomized controlled trial comparing the LRYGB to LMGB was carried out by Lee in 2005. With a group of 40 patients the effectiveness of LMGB was compared to the LRYGB. The authors found an EWL of 64.9% after one and 64.4% after two years, respectively, in patients having a LMGB accompanied by less complications and a shorter hospitalization time than in LRYGB. Patients with LRYGB had an EWL of 58.7% and 60%, respectively.

These results showed similar benefits of the LMGB compared to LRYGB. This is in accordance with the already mentioned observational studies.

Eligibility criteria: Inclusion Criteria:

* BMI \> 35
* age \> 18

Exclusion Criteria:

* malignancy
* lack of compliance
* BMI \> 50

Primary outcomes:
measure: Excess Weight Loss
timeFrame: 1 year postoperative
Secondary outcomes:
measure: Early surgical complications
timeFrame: ≤ 30 days
measure: Early non-surgical complications
timeFrame: ≤ 30 days
measure: Operation time
timeFrame: intraoperative
measure: Length of stay
timeFrame: up to 24 weeks
measure: Subjective perception of the appetite and saturation
timeFrame: 6 weeks, 1 and 3 years
measure: Hormonal assay (Ghrelin)
timeFrame: preoperative, 6 weeks, 1 and 3 years
measure: Hormonal assay (GLP-1)
timeFrame: preoperative, 6 weeks, 1 and 3 years
measure: Hormonal assay (PYY)
timeFrame: preoperative, 6 weeks, 1 and 3 years
measure: Glucose homeostasis
timeFrame: preoperative, 6 weeks, 1 and 3 years
measure: Lipid profile
timeFrame: preoperative, 6 weeks, 1 and 3 years
Other outcomes:
Locations:
city: Schlieren
country: Switzerland
facility: Spital Limmattal
state: Zürich
Study officials:
affiliation: Spital Limmattal Schlieren
name: Urs Zingg, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Sjostrom L, Narbro K, Sjostrom CD, Karason K, Larsson B, Wedel H, Lystig T, Sullivan M, Bouchard C, Carlsson B, Bengtsson C, Dahlgren S, Gummesson A, Jacobson P, Karlsson J, Lindroos AK, Lonroth H, Naslund I, Olbers T, Stenlof K, Torgerson J, Agren G, Carlsson LM; Swedish Obese Subjects Study. Effects of bariatric surgery on mortality in Swedish obese subjects. N Engl J Med. 2007 Aug 23;357(8):741-52. doi: 10.1056/NEJMoa066254.
citation: Adams TD, Gress RE, Smith SC, Halverson RC, Simper SC, Rosamond WD, Lamonte MJ, Stroup AM, Hunt SC. Long-term mortality after gastric bypass surgery. N Engl J Med. 2007 Aug 23;357(8):753-61. doi: 10.1056/NEJMoa066603.
citation: Colquitt JL, Pickett K, Loveman E, Frampton GK. Surgery for weight loss in adults. Cochrane Database Syst Rev. 2014 Aug 8;2014(8):CD003641. doi: 10.1002/14651858.CD003641.pub4.
citation: Rutledge R. The mini-gastric bypass: experience with the first 1,274 cases. Obes Surg. 2001 Jun;11(3):276-80. doi: 10.1381/096089201321336584.
citation: Lee WJ, Yu PJ, Wang W, Chen TC, Wei PL, Huang MT. Laparoscopic Roux-en-Y versus mini-gastric bypass for the treatment of morbid obesity: a prospective randomized controlled clinical trial. Ann Surg. 2005 Jul;242(1):20-8. doi: 10.1097/01.sla.0000167762.46568.98.
citation: Rutledge R, Walsh TR. Continued excellent results with the mini-gastric bypass: six-year study in 2,410 patients. Obes Surg. 2005 Oct;15(9):1304-8. doi: 10.1381/096089205774512663.
citation: Lee WJ, Ser KH, Lee YC, Tsou JJ, Chen SC, Chen JC. Laparoscopic Roux-en-Y vs. mini-gastric bypass for the treatment of morbid obesity: a 10-year experience. Obes Surg. 2012 Dec;22(12):1827-34. doi: 10.1007/s11695-012-0726-9.
citation: Wittgrove AC, Clark GW. Laparoscopic gastric bypass, Roux-en-Y- 500 patients: technique and results, with 3-60 month follow-up. Obes Surg. 2000 Jun;10(3):233-9. doi: 10.1381/096089200321643511.
citation: Rutledge R. Similarity of Magenstrasse-and-Mill and Mini-Gastric bypass. Obes Surg. 2003 Apr;13(2):318. doi: 10.1381/096089203764467315. No abstract available.
citation: Christou NV, Look D, Maclean LD. Weight gain after short- and long-limb gastric bypass in patients followed for longer than 10 years. Ann Surg. 2006 Nov;244(5):734-40. doi: 10.1097/01.sla.0000217592.04061.d5.
citation: Kraljevic M, Delko T, Kostler T, Osto E, Lutz T, Thommen S, Droeser RA, Rothwell L, Oertli D, Zingg U. Laparoscopic Roux-en-Y gastric bypass versus laparoscopic mini gastric bypass in the treatment of obesity: study protocol for a randomized controlled trial. Trials. 2017 May 22;18(1):226. doi: 10.1186/s13063-017-1957-9.