Table of ContentsView AllTable of ContentsPurposeHow to PrepareWhat to ExpectRecoveryLong-Term CareNext in Gastric Bypass Surgery GuideGastric Bypass Surgery: How to Prepare

Table of ContentsView All

View All

Table of Contents

Purpose

How to Prepare

What to Expect

Recovery

Long-Term Care

Next in Gastric Bypass Surgery Guide

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A patient undergoing gastric bypass weight loss surgery

What Is Gastric Bypass Surgery?

Surgical Techniques

Less commonly, the surgery is performed as open surgery. This means that the surgeon accesses the stomach and small intestine through a large incision in the abdomen.

The “Gold Standard”

Criteria and Contraindications

BMI is a dated, flawed measure. It does not take into account factors such asbody composition, ethnicity, sex, race, and age. Even though it is a biased measure, BMI is still widely used in the medical community because it’s an inexpensive and quick way to analyze a person’s potential health status and outcomes.

An exception to the above criteria is that Asian patients who have uncontrolled type 2 diabetes and a BMI as low as 27.5 may be considered for weight loss surgery.

This exception stems from the fact that, when compared to whites, people of Asian origin are more likely to accumulate fat in their abdomen, as opposed to their buttocks, hips, and thighs. This abdominal fat buildup increases their risk for insulin resistance and heart disease, even at relatively low body mass index levels.

Potential Risks

Purpose of Gastric Bypass Surgery

Therefore, even if a person meets the above-mentioned medical criteria for surgery, they still need to undergo several pre-surgical assessments in order to ensure they are medically, psychologically, and cognitively ready for this lifelong commitment.

Some of these tests may include:

Based on test results and/or a patient’s medical history, specialty consultations may be required. For example, anendocrinologyconsultation may be recommended for patients with type 2 diabetes and poorly controlled glucose levels.

Psychological and cognitive assessments are also required.

Goals of these psychological/cognitive assessments include:

Final tests required for surgery clearance include:

Important Note

Bariatric Surgery: Everything You Need to Know

Once you are cleared for surgery and your procedure date is scheduled, your surgical team will give you instructions on how to prepare.

These instructions may include:

Gastric Bypass Surgery: How to Prepare

What to Expect on the Day of Surgery

Once you are admitted and prepped for surgery, an antibiotic will be given and your anesthesia will be administered via an IV. Your surgeon will then perform the following steps:

You will engage in some form of physical activity (usually leg exercises) with the assistance of your nurse. Soon thereafter, you will begin getting out of bed and walking around. If you are experiencing any difficulties performing these exercises (perhaps due to post-surgical weakness or obesity-related mobility problems), your nurse or surgeon may call aphysical therapistto assist you.

Upon discharge, your surgeon will give you specific instructions about recovering at home. You will likely be asked to:

When to Seek Medical AttentionAs you recover from surgery, it’s important to reach out to your surgeon if you develop any of the following symptoms:FeverSigns of a wound infection (e.g., redness, swelling, increased pain, or abnormal drainage)Chest pain or trouble breathingNausea or vomiting that lasts more than 12 hoursLeg or calf pain, redness, or swellingUrinating fewer than four times in 24 hoursPain that is not eased with medication

When to Seek Medical Attention

As you recover from surgery, it’s important to reach out to your surgeon if you develop any of the following symptoms:FeverSigns of a wound infection (e.g., redness, swelling, increased pain, or abnormal drainage)Chest pain or trouble breathingNausea or vomiting that lasts more than 12 hoursLeg or calf pain, redness, or swellingUrinating fewer than four times in 24 hoursPain that is not eased with medication

As you recover from surgery, it’s important to reach out to your surgeon if you develop any of the following symptoms:

The key to maintaining this weight loss in the long-term includes the following practices:

It will also be important to attend all of your follow-up appointments with your surgeon and bariatric dietitian. The purpose of these various appointments is to:

For your long-term recovery, your surgeon may recommend that you join a bariatric surgery support group. Doing so may provide you with valuable resources and emotional guidance for issues like remaining committed to your lifestyle changes, dealing with any post-surgical body image concerns, and returning to work or dating life.

A Word From Verywell

26 Sources

Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read oureditorial processto learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.

Clapp B, Ponce J, DeMaria E, et al.American Society for Metabolic and Bariatric Surgery 2020 estimate of metabolic and bariatric procedures performed in the United States.Surg Obes Relat Dis. 2022;18(9):1134-1140. doi:10.1016/j.soard.2022.06.284

Beamish AJ, Reinehr T.Should bariatric surgery be performed in adolescents?Eur J Endocrinol.2017 Apr;176(4):D1-D15. doi:10.1530/EJE-16-0906

American Society for Metabolic and Bariatric Surgery.Bariatric Surgery Procedures.

Maciejewski ML, Arterburn DE, Scoyoc LV, et al.Bariatric Surgery and Long-term Durability of Weight Loss.JAMA Surg. 2016 Nov 1;151(11):1046-1055. doi:10.1001/jamasurg.2016.2317

Telem DA, Jones DB, Schauer PR, Brethauer SA, Rosenthal RJ, Provost D, Jones SB. Society of American Gastrointestinal and Endoscopic Surgeons (SAGES).Updated Panel Report: Best Practices for the Surgical Treatment of Obesity.

Shah SS, Todkar JS, Shah PS, Cummings DE.Diabetes Remission and Reduced Cardiovascular Risk After Gastric Bypass in Asian Indians with Body Mass Index <35 kg/m2.Surg Obes Relat Dis.2010 Jul–Aug; 6(4): 332–338. doi:10.1016/j.soard.2009.08.009

Stahl JM, Malhotra S.Obesity Surgery Indications and Contraindications. In:StatPearls[Internet]. Treasure Island (FL): StatPearls Publishing.

Lim RB.Bariatric operations for management of obesity: Indications and preoperative preparation. Jones D, ed. UpToDate. Waltham, MA: UpToDate.

Anastomotic Leak After Gastric Bypass Surgery. University of Rochester Medical Center.

Wolfe BM, Kvach E, Eckel RH.Treatment of Obesity: Weight Loss and Bariatric Surgery.Circ Res.2016 May 27; 118(11):1844–1855. doi:10.1161/CIRCRESAHA.116.307591

Monpellier VM, Antoniou EE, Aarts EO, Janssen IMC, Jansen ATM.Improvement of Health-Related Quality of Life After Roux-en-Y Gastric Bypass Related to Weight Loss.Obes Surg.2017; 27(5): 1168–1173. doi:10.1007/s11695-016-2468-6

Adams TD, Mehta TS, Davidson LE, Hunt SC.All-Cause and Cause-Specific Mortality Associated with Bariatric Surgery: A Review.Curr Atheroscler Rep.2015 Dec; 17(12): 74. doi:10.1007/s11883-015-0551-4

Sogg S, Lauretti J, West-Smith L.Recommendations for the presurgical psychosocial evaluation of bariatric surgery patients.Review Surg Obes Relat Dis.2016 May;12(4):731-749. doi:10.1016/j.soard.2016.02.008

Horwitz D, Saunders JK, Ude-Welcome A, Parikh M.Insurance-mandated medical weight management before bariatric surgery.Comparative Study Surg Obes Relat Dis.Mar-Apr 2016;12(3):496-499. doi:10.1016/j.soard.2015.09.004

Johns Hopkins Medicine.Roux-en-Y Gastric Bypass Weight-Loss Surgery.

UCSF Health.Recovery from Bariatric Surgery.

Brigham and Women’s Hospital. Department of Rehabilitation Services Physical Therapy.Standard of Care: Bariatric.

Brigham and Women’s Center for Metabolic and Bariatric Surgery.Nutrition Guidelines for Sleeve Gastrectomy and Gastric Bypass.

University of Pittsburgh Medical Center.About Post-Surgery Bariatric Vitamins & Bariatric Supplements.

Richardson WS, Plaisance AM, Periou L, Buquoi J, Tillery D.Long-term Management of Patients After Weight Loss Surgery.Ochsner J.2009 Fall; 9(3): 154–159.

University of Pittsburgh Medical Center.Phase 4: Stabilization Diet for Post-Bariatric Surgery Patients.

Hameed S.Beyond weight loss: Establishing a postbariatric surgery patient support group—what do patients want?J Obes.2018;2018:8419120. doi:10.1155/2018/8419120

Aminiana A, Changa J, Brethauera SA, Kimb JJ. American Society for Metabolic and Bariatric Surgery Clinical Issues Committee.ASMBS updated position statement on bariatric surgery in class I obesity (BMI 30-35 kg/m2).Surgery for Obesity and Related Diseases. 14 (2018) 1071-87.University of California, Los Angeles Health.Obesity Treatments: Gastric Bypass Surgery.

Aminiana A, Changa J, Brethauera SA, Kimb JJ. American Society for Metabolic and Bariatric Surgery Clinical Issues Committee.ASMBS updated position statement on bariatric surgery in class I obesity (BMI 30-35 kg/m2).Surgery for Obesity and Related Diseases. 14 (2018) 1071-87.

University of California, Los Angeles Health.Obesity Treatments: Gastric Bypass Surgery.

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