The name of Mini gastric Bypass is being changed as one anastamosis Gastric Bypass or Long loop Gastric Bypass.Intead of adding Braun we can as well go for RNY Bypass. RNY is more of a restrictive  with some malabsobtive effect as the BP limb is generally 50 cms.

Thanks sir

In this article they did not find any difference in weight loss when comparing Roux length of 100 cm and 150 cm in patients with BMI below 50:

Surg Endosc. 2003 Jul;17(7):1055-60. Epub 2003 May 6.

Effect of standard vs extended Roux limb length on weight loss outcomes after laparoscopic Roux-en-Y gastric bypass.

Feng JJ1, Gagner M, Pomp A, Korgaonkar NM, Jacob BP, Chu CA, Voellinger DC, Quinn T, Herron DM, Inabnet WB.

Abstract

BACKGROUND:

Increasing the length of the Roux limb in open Roux-en-Y gastric bypass (RYGB) effectively increases excess weight loss in superobese patients with a body mass index (BMI) >50 kg/m2. Extending the RYGB limb length for obese patients with a BMI < 50 could produce similar results. The purpose of this study was to compare the outcomes of superobese patients undergoing laparoscopic RYGB with standard (< or =100-cm) with those undergoing the procedure with an extended (150-cm) Roux limb length over 1-year period of follow-up.

METHODS:

Retrospective data over 2.5 years were reviewed to identify patients with a BMI < 50 who underwent primary laparoscopic RYGB with 1-year follow-up ( n = 58). Forty-five patients (sRYGB group) received limb lengths < or = 100 cm, including 45 cm ( n = 1), 50 cm ( n = 2), 60 cm ( n = 6), 65 cm ( n = 1), 70 cm ( n = 1), 75 cm ( n = 3), and 100 cm ( n = 31). Thirteen patients (eRYGB group) received 150-cm limbs. Postoperative weight loss was compared at 3 weeks, 3 months, 6 months, and 1 year.

RESULTS:

Comparing the sRYGB vs the eRYGB group (average +/- SD), respectively: There were no significant differences in age (41.5 +/- 11.0 vs 38.0 +/- 11.9 years), preoperative weight (119.2 +/- 11.9 vs 127.8 +/- 12.5 kg), BMI (43.7 +/- 3.0 vs 45.2 +/- 3.5 kg/m2), operative time (167.1 +/- 72.7 vs 156.5 +/- 62.4 min), estimated blood loss (129.9 +/- 101.1 vs 166.8 +/- 127.3 cc), or length of stay (median, 3 vs 3 days; range, 2-18 vs 3-19). Body weight decreased over time in both groups, except in the sRYGB group between 3 and 6 months and 6 and 12 months after surgery and in the eRYGB group between 6 and 12 months. BMI also decreased over time, except in the eRYGB group between 6 and 12 months. Absolute weight loss leveled out between 6 and 12 months in both groups, with no increase after 6 months. Percent of excess weight loss did not increase in the eRYGB group after 6 months. An extended Roux limb did not significantly affect body weight, BMI, absolute weight loss, or precent of excess weight loss at any time point when the two groups were compared. A trend toward an increased proportion of patients with >50% excess weight loss ( p = 0.07) was observed in the extended Roux limb group.

CONCLUSIONS:

In this series, no difference in weight loss outcome variables were observed up to 1 year after laparoscopic RYGB. Thus, extending Roux limb length from < or =100 cm to 150 cm did not significantly improve weight loss outcome in patients with a BMI < 50 kg/m2.

No difference is also shown here:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4743521/

ROUX-EN-Y GASTRIC BYPASS: LIMB LENGTH AND WEIGHT LOSS

Antonio Carlos VALEZI, Antonio César MARSON, Rodrigo Alves MERGUIZO, and Fernando Leão COSTA

From the Disciplina de Cirurgia Digestiva do Departamento de Cirurgia da Universidade Estadual de Londrina (Service of Digestive Surgery, Department of Surgery, State University of Londrina), Londrina, PR, Brazil

Correspondence: Antonio Carlos Valezi rb.moc.letmocres@izelav

Abstract

Background

Roux-en-Y gastric bypass is a surgical technique widely used in the treatment of obesity. It is unclear, however, if the length of the biliopancreatic and alimentary limb interferes with the magnitude of weight loss.

Aim

To evaluate if the length of these limbs is related to the percentage of weight loss one year after surgery.

Method

One hundred and twenty obese people underwent surgery between 2009 and 2011. Patients were inserted into four groups: A) biliopancreatic limb with 50 cm length and alimentary limb with100 cm length; B) biliopancreatic limb with 50 cm length and alimentary limb with 150 cm length; C) biliopancreatic limb with 100 cm length and alimentary limb with100 cm length; D) biliopancreatic limb with 100 cm length and alimentary limb with150 cm length. Age, gender, body mass index and the percentage of total weight loss were analyzed. Data were collected preoperatively and one year after surgery. The groups were compared and weight loss compared between groups.

Results

The follow-up occurred in 78.3% of the sample. The composition of the groups was similar, with no statistical significance. The average age was 43 years in groups A, C and D and 42 years in group B. The female gender predominated in all groups (about 60% of the sample). The mean body mass index was 46 kg/m2 for groups A, C and D and 42 kg/m2 in group B. The percentage of weight loss was 33% for group A and 34% for groups B, C and D. There was no significant difference among groups.

Conclusion

Different lengths of the biliopancreatic and alimentary limbs did not affect the percentage of total weight loss.

 Many thanks for your input Dr. Raziel. 

I think this further proves my point - simply perform a Braun JJ anastomosis instead of creating a RNY limb........