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Sleeve Gastrectomy Vs Gastric Bypass

Sleeve Gastrectomy Vs Gastric Bypass

While deciding which type of bariatric surgery to opt for, a number of factors is to be kept in mind, which includes how much weight loss is required, kind of health problems, risk level and cost. Both procedures involve reducing stomach size, but in different ways. However, both are permanent operations that reduce the appetite and lead to the highest percentage of weight loss.


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Sleeve Gastrectomy

Gastric Bypass


In a sleeve gastrectomy procedure the side part of the stomach is removed, producing a tube shaped stomach (sleeve)

A small stomach pouch is created which is directly attached to the intestines, so that the food bypass the stomach.

How it will help to lose weight

  • This procedure removes ghrelin, hormone responsible for stimulating hunger.

  • It will limit the amount of food that can be eaten at one time & a person will also stay full for a long time

  • Once the food intake is reduced, body stops storing extra calories and starts using its fat supply for energy.

This procedure limits the amount of food that can be eaten at one time & will help the person stay full for a longer period of time.

Average surgery time

        1.5– 3.5 hours

2 – 4 hours

Hospital stay

         2- 12 days

2 – 8 days

Recovery time

          2 - 4 weeks

2 weeks

CostThe cost of sleeve gastrectomy surgery in India starts from USD 5,300The cost of gastric bypass surgery in India starts from USD 6,000

Good candidate

  • A good candidate for sleeve gastrectomy is a patient who has a BMI above 50

  • Patients with a BMI above 40 are suitable for gastric bypass surgery.

  • It’s is a good option for obese patient who are unable to lose weight with exercise, diet, and medication

  • Patient suffering from life threatening problems due to obesity, like Type 2 diabetes

Expected weight loss

50-70% of excess body weight in the first two years is reduced with the help of sleeve gastrectomy.

60 – 80% of excess body weight is reduced in the first year post the gastric bypass surgery.

Speed of weight loss

Targeted weight loss is seen after two years

Targeted weight loss is seen in the first year

Dietary guidelines

  • In sleeve gatrectomy diet the patient can consume around 600- 800 calories daily during the weight loss procedure.
  • Patient is advised to take five small healthy meals (without any in between snacking) per day.

  • High calorie food has to be avoided.

  • The gastric bypass diet makes the patient consume 800 calories daily during the procedure.
  • Patient is advised to take three small meals in a puree consistency.

  • Patient is advised to avoid high fat, high calorie, and sticky, fibrous & dry foods as they can block the stomach.


The benefits of sleeve gastrectomy are: 

  • It is a safe and a less complex procedure

  • Limits ingestion of food and hunger by getting rid of ghrelin, the hunger hormone

  • Leads to natural digestion that doesn’t cause nutritional deficiencies usually associated with gastric bypass

  • Keeps the small intestine and pyloric valve intact

  • It is a good option for high-risk patients having a high BMI and/or medical issues such as Crohn’s disease, prior surgery, anemia, or anti-inflammatory medication


Following are the benefits of gastric bypass surgery:

  • Controls amount of food that can be consumed

  • Malabsorption promotes more weight loss

  • Prevents and limits intake of sweets

  • It sustains long-term weight loss results



No risk of dumping syndrome

Risk of dumping syndrome

Risk & disadvantages

Sleeve gastrectomy risks include:

  • Bleeding, infection, and blood clots

  • Stomach leakage along the stapled edge

  • Irreversible


The risks of gastric bypass surgery are:

  • Bleeding, infection, and blood clots

  • Stomach leakage along the stapled line

  • Complex, invasive surgical procedure

  • Dumping syndrome

  • Possible nutritional deficiency

  • Ulcer, gallstones, bowel obstruction, and reflux



Author Name
Dr Pooja Chaudhary

Published Date
: 05-Jun-2016

Dr. Pooja Chaudhary is a well known health blogger. She writes for some of the well known medical sites in India and US.

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