Gastric Sleeve Stricture (Stenosis): Symptoms, Tests and Treatment

A sleeve stricture, also called stenosis, is a narrowing or twist in the sleeve that slows or blocks food and liquid. It usually shows up as vomiting, food that feels stuck, or new reflux that does not settle. It is confirmed with an upper GI X-ray or endoscopy. Many cases are treated by stretching the narrowed area with a balloon; a minority need surgery.

What a sleeve stricture is

After a sleeve gastrectomy the stomach is a narrow tube. If one section is tighter than the rest, or the tube rotates on itself, food cannot pass easily. A 2024 study in the journal Medicina (Elsebaey and colleagues) describes two forms:

• Organic (mechanical) stenosis: a true narrowing of the channel.
• Functional stenosis: a twist or kink of the sleeve along its length. The channel is not actually scarred shut, but the bend acts like a blockage.

The same paper notes that the most common site of a twist is the incisura angularis, the natural bend partway down the stomach. Citing earlier series, the authors put the reported rate of stenosis after sleeve gastrectomy at about 0.5% to 5%. A 2022 review by Park puts clinically significant stenosis at 0.5% to 3.5%, also usually at that bend.

The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) lists strictures among the possible later problems of weight-loss surgery and notes that they can make solid food hard to eat and cause nausea, vomiting or trouble swallowing.

Symptoms

Some fullness and the odd episode of vomiting are part of learning to eat with a sleeve. A stricture is different because it persists or gets worse. In the Elsebaey study of 22 people with a twisted sleeve, every patient had vomiting, about two thirds had pain after eating, and about a third had reflux symptoms. People may describe:

• Repeated vomiting, nausea or regurgitation
• Trouble swallowing, particularly solid food, or in tighter cases liquids too
• Heartburn or a sour taste that acid medicine does not control
• Pain or pressure in the upper abdomen after eating
• Losing weight faster than expected, with weakness

Symptoms can begin in the first weeks or months later. A meta-analysis in Gastrointestinal Endoscopy (Chang and colleagues, 2020) separates early stenosis, within three months of surgery, from late stenosis after that.

How it is diagnosed

Two tests do most of the work, and they are often used together.

• Upper GI series. You drink contrast while X-ray pictures follow it through the sleeve. According to the Elsebaey paper, this can show a twist, in some patients with a widened section of sleeve above it.
• Upper endoscopy. A thin flexible camera is passed through the mouth under sedation. In a twisted sleeve the staple line appears rotated instead of running straight. Endoscopy also lets the doctor check for inflammation or an ulcer and, if appropriate, treat the narrowing in the same session.

With a twist the scope can often be steered past the narrow point, so the symptoms you describe matter as well. Ask the office where these tests are done.

Treatment

First steps

A systematic review in Surgery for Obesity and Related Diseases (Brunaldi and colleagues, 2020) recommends starting with non-invasive medical care, then moving to endoscopic treatment if needed. Such care often includes acid-reducing and anti-nausea medicine; in the Elsebaey study, patients were diagnosed after symptoms had not responded to these within one to two weeks. Your doctor may also adjust what you eat and drink.

Balloon dilation

During endoscopy a balloon is positioned across the narrow segment and inflated to stretch it. In the Chang meta-analysis of 18 studies and 426 patients, balloon dilation resolved symptoms in 76% overall, with an average of 1.8 dilations per person. The Brunaldi review reported a similar figure, 82% (296 of 361) for endoscopic treatment as the first approach. Expect that more than one session may be needed; the Park review says at least two are usually required. Ask the office who would perform a dilation.

Dilation has its own risks. Bleeding and a tear in the stomach wall (perforation) have been reported in published studies. Ask your doctor to go over these before the procedure.

Surgery when dilation is not enough

In the Chang analysis 17% of patients went on to surgery after dilation failed, and that surgery was successful in 91%. The Brunaldi review advises reserving revisional surgery for endoscopic failure. The Park review names conversion of the sleeve to a gastric bypass, which routes food around the narrowed section, as a surgical option when endoscopic treatment does not work. Ask the office whether this surgery is available through the practice. Our page on sleeve to bypass conversion explains what that involves.

Why it should not be left

Weeks of vomiting cause more than discomfort. The Elsebaey paper warns of malnutrition, electrolyte disturbances, vitamin deficiencies and repeated hospital admissions. The 2021 Enhanced Recovery After Surgery (ERAS) Society guidelines add that vomiting raises the risk of thiamine (vitamin B1) deficiency after bariatric surgery, and that a suspected deficiency must be treated immediately. A lack of thiamine can affect the nerves and brain. Tell your surgeon early if you are vomiting most days. See also nutrition after bariatric surgery.

When to call

Go to an emergency room or call 911 if

• You cannot keep down any liquids
• You are vomiting blood or material that looks like coffee grounds
• You have severe abdominal or chest pain
• You are confused, very weak, have double vision or trouble walking after a period of vomiting

Call the office the same day if

• You vomit at most meals for more than a day or two
• Foods you tolerated last week no longer go down
• Heartburn is new or worsening despite your medicine
• Your urine is dark and you cannot reach your fluid goal

Frequently asked questions

How do I tell a stricture from eating too fast?

Eating too quickly or taking large bites causes pressure or vomiting at that meal, and it improves when you slow down and chew well. A stricture causes trouble at most meals however carefully you eat, and it tends to progress from solids to softer foods and then liquids. If careful eating does not fix it within a few days, ask for an evaluation.

Is balloon dilation of a sleeve painful?

It is done during an endoscopy with sedation. In the Elsebaey study, which used deep sedation, most patients had upper abdominal pain afterward and some had a sore throat, and these settled within two to three days. There were no significant adverse events in that series of 22 people, though other studies have reported them. Ask your doctor what to expect and which symptoms afterward should prompt a call.

Can a sleeve stricture come back after dilation?

Yes. That is why repeat sessions are common: the Chang meta-analysis found an average of 1.8 dilations per person. If symptoms return after several attempts, or never fully clear, surgery becomes the discussion. In the same analysis about one in six patients needed an operation.

Could my sleeve have been made too tight?

Sleeve size is one factor, but not the only one. The Park review links true narrowing to the use of a narrow sizing tube and to where stapling starts. A twist can come from the stomach becoming more mobile after surgery or from scarring along the staple line, according to the Elsebaey paper. Getting the right test and treatment matters more than finding fault.

I had my sleeve done elsewhere. Can I be evaluated here?

That depends on your situation, so call the office and ask. If you do come in, your operative report, the date of surgery, and any X-ray or endoscopy reports all help. Our page on sleeve care for transfer patients has more on this. If you cannot keep liquids down, go to an emergency room first.

Talk with Dr. Davtyan in Rancho Cucamonga

Dr. David G. Davtyan, MD, FACS, FICS, FASMBS, is a bariatric surgeon at Davtyan Medical Weight Loss & Wellness, 8330 Red Oak Street, Suite 201, Rancho Cucamonga, CA 91730. Call 909-355-2525 or toll free 877-9-BE-SLIM (877-923-7546), or reach us through the contact page. The first consultation is complimentary, and Hablamos Español. For related topics, see the Rancho Cucamonga gastric sleeve guide.

Sources

• Elsebaey MA, et al. The efficacy and safety of endoscopic balloon dilatation in the treatment of functional post-sleeve-gastrectomy stenosis. Medicina (Kaunas). 2024
• Chang SH, Popov VB, Thompson CC. Endoscopic balloon dilation for treatment of sleeve gastrectomy stenosis: a systematic review and meta-analysis. Gastrointest Endosc. 2020;91(5):989-1002
• Brunaldi VO, et al. Isolated sleeve gastrectomy stricture: a systematic review on reporting, workup, and treatment. Surg Obes Relat Dis. 2020;16(7):955-966
• NIDDK. Weight-loss Surgery Side Effects
• Park JY. Diagnosis and Management of Postoperative Complications After Sleeve Gastrectomy. J Metab Bariatr Surg. 2022;11(1):1-12
• Stenberg E, et al. Guidelines for Perioperative Care in Bariatric Surgery: Enhanced Recovery After Surgery (ERAS) Society Recommendations: A 2021 Update. World J Surg. 2022;46(4):729-751

More in the Gastric Sleeve in Rancho Cucamonga guide

Start at the Gastric Sleeve in Rancho Cucamonga page, or go straight to a topic.

Understanding the sleeve

• Staple-Line Leak After Gastric Sleeve: Signs, Timing and Treatment
• Gastric Sleeve Stricture (Stenosis): Symptoms, Tests and Treatment
• Acid Reflux and GERD After Gastric Sleeve Surgery
• Hiatal Hernia and Gastric Sleeve Surgery
• Gallstones After Gastric Sleeve Surgery
• Hair Loss After Gastric Sleeve Surgery
• Nausea, Dehydration and Constipation After Gastric Sleeve Surgery
• Gastric Sleeve Emergency Warning Signs: When to Go to the ER
• Weight Regain After Gastric Sleeve: Why It Happens and What Can Be Done
• Vitamins and Lab Tests After a Gastric Sleeve
• Alcohol After a Gastric Sleeve: What Changes and What the Evidence Says
• Pregnancy After a Gastric Sleeve: Timing, Nutrition and Monitoring

Weighing your options

• Gastric Sleeve With a BMI of 30 to 34.9
• Gastric Sleeve With a BMI of 50 or More
• Gastric Sleeve Surgery After Age 60
• Gastric Sleeve and Type 2 Diabetes: What the Trials Show
• Tests Before Gastric Sleeve Surgery
• The pre-surgery liver diet before a gastric sleeve
• Insurance requirements for a gastric sleeve: how insurers decide
• What affects the cost of gastric sleeve surgery
• Converting a gastric sleeve to a gastric bypass
• Gastric sleeve in Mexico or near home: what to weigh
• Second opinions on gastric sleeve surgery: when and how
• Questions to ask a gastric sleeve surgeon

Getting care in Rancho Cucamonga

• Sleeve done elsewhere: how to move your follow-up care
• Gastric sleeve revision: reasons, tests and options
• Your first gastric sleeve consultation: what happens and what to bring
• From consultation to gastric sleeve surgery: the steps in order
• Gastric sleeve surgery day and the hospital stay
• Returning to work, driving, lifting and exercise after a gastric sleeve
• Gastric sleeve follow-up schedule: visits, labs and support
• Gastric sleeve care for Ontario, CA residents
• Gastric sleeve care for Fontana, CA residents
• Gastric sleeve care for Upland and Claremont residents
• Gastric sleeve care for Riverside and Corona residents
• Gastric sleeve care for San Bernardino and Redlands residents