Skip to main contentDr. Jivraj Mehta Hospital · Vasna, Ahmedabad
Tapping Book on WhatsApp will likely open the WhatsApp app on your phone.
Last updated: 23-Oct-2026
SMA syndrome treatment · Dr. Jivraj Mehta Hospital, Vasna, Ahmedabad
SMA syndrome is a blockage of the small bowel just after the stomach. A part of the bowel called the duodenum gets squeezed between two large blood vessels, the aorta and the superior mesenteric artery (SMA).
It mostly happens after a lot of weight is lost. A pad of fat normally holds the two vessels apart. When that fat melts away, the gap narrows and the bowel is pinched.
For most people, careful feeding that brings the weight back is the main treatment. An operation is for the few who do not get better after a proper trial of feeding.
The duodenum is the first part of the small bowel. Its third part crosses the spine, in a narrow gap between the aorta behind and the SMA in front. If the gap closes, food cannot pass.
Dr. Jivraj Mehta Hospital. Trained in super-specialty surgical gastroenterology programmes, qualified twice over in the specialty, with 18 years of experience in gastro and intestine surgery. Every patient with suspected SMA syndrome is seen with the dietitian and the gastroenterologist before any operation is discussed.
Dr Harsh Shah
MS, MCh (Surgical Gastroenterology), DrNB (Surgical Gastroenterology)
Registered with Gujarat Medical Council, Reg. No. G-38738
Intestine & Gastro Surgeon · Dr. Jivraj Mehta Hospital, Vasna, Ahmedabad
Google rating at Dr. Jivraj Mehta Hospital, Vasna: 4.89 from 216 reviews. At Dr. Jivraj Mehta Hospital, Vasna, Ahmedabad: 4.94 from 18 reviews.
The pattern matters more than any single sign. Pain and fullness come soon after eating, and green vomiting follows. Many people find a position that gives relief.
Some people are told for months that they have acidity or a “nervous stomach”. If you lose weight and vomit after meals, ask for the tests below.
Many thin people have a narrow angle between the two vessels and no blockage at all. A CT measurement on its own is not the diagnosis.
Three things must be present together: the narrow gap on the scan, proof that the duodenum is truly blocked, and other causes ruled out. Operating on a measurement alone leads to operations that do not help.
| What is checked | What it shows in SMA syndrome |
|---|---|
| The angle between the aorta and the SMA. | Much narrower than usual. |
| The distance between the two vessels. | A few millimetres, where the duodenum is pinched. |
| The stomach and the first part of the duodenum. | Swollen with fluid, with a sharp cut-off where the vessel crosses. |
| The contrast study. | Contrast held up at the same point, moving back and forth, and passing when you lie on your left side. |
The tests answer three questions. Is the duodenum truly blocked? Is it the vessels, or something else? And how weak has the body become?
Several conditions look like SMA syndrome. Some are simple, and a few are serious. They must be ruled out before this diagnosis is accepted.
| Condition | How it is told apart |
|---|---|
| An ulcer or scarring at the stomach outlet. | Endoscopy shows the ulcer or the narrowing. |
| Malrotation, a bowel that sat wrongly from birth. | CT shows the bowel and its vessels in the wrong place. |
| Gastroparesis, a slow stomach. | The stomach empties slowly, but no cut-off is seen in the duodenum. |
| A growth in the duodenum, pancreas or nearby glands. | Endoscopy, biopsy and CT show a mass. This is then treated as a cancer, with a different plan. |
| Tuberculosis of the bowel or glands. | CT shows thickened bowel or glands; tests and sometimes a biopsy confirm it. |
If a growth is found, the cancer team takes over and the plan changes completely. If the bowel is simply pinched, the steps below follow.
Most people with SMA syndrome never need an operation. Once the weight comes back, the fat pad returns, the gap widens and the blockage opens.
Treatment goes step by step, from settling the stomach to feeding to an operation. Most people stop at the feeding step.
| Step | What is done |
|---|---|
| Settle the stomach. | A tube through the nose drains the swollen stomach; drip fluids and salts are given. |
| Position after meals. | Lying on the left side or face down for a while after eating. |
| Small, frequent meals. | Soft, calorie-rich food in small amounts, many times a day. |
| Tube feeding past the blockage. | A thin tube placed beyond the pinched part, so food reaches the bowel below. |
| Feeding through a vein. | When a tube cannot be placed or is not tolerated. |
| Treating the cause. | The illness or eating problem that started the weight loss. |
| An operation to bypass the pinch. | Only when a proper trial of feeding has not worked. |
The key step is a thin feeding tube that goes through the nose, past the pinched part, into the bowel beyond. Food then reaches the bowel even though the duodenum is blocked.
A body that has been starved for months can react badly when food returns too fast. The salts in the blood can fall sharply. This is called refeeding syndrome, and it is dangerous.
It can be prevented. Feeding starts slowly, a vitamin is given first, and the blood salts are checked every day.
SMA syndrome is often a result of another illness. If that illness is not treated, the weight falls again and the blockage returns.
An operation is offered only after a real trial of feeding has failed. It is not offered because a CT report shows a narrow angle.
Every case is discussed with the gastroenterologist and the dietitian before the decision is made. In this condition, the decision to operate needs the most care.
The usual operation joins the swollen duodenum, above the pinch, to a loop of small bowel below it. Food then flows around the pinched part instead of through it.
A very weak, underweight body heals poorly, and a new join in the bowel can leak. A few weeks of feeding before surgery makes the operation much safer.
Every step carries some risk. Feeding has its own risks, and so does the operation. Your own risks are discussed in person before you agree.
Feeding does not stop because an operation has been done. The operation opens the blockage. It does not bring the weight back on its own.
| When | What happens |
|---|---|
| Day of surgery. | Sitting out of bed, sips of water, and pain relief that limits strong painkillers. |
| Day 1. | More fluids, walking three times, and a review by the dietitian. |
| Days 2 to 3. | Soft food, drips reduced, and a watch for a slow stomach. |
| Days 4 to 6. | Normal food and a written feeding plan. Most people go home in this window. |
You go home only when you are eating, walking, without fever, with stable blood salts, and with a written plan from the dietitian.
A few signs need the hospital the same day. Patients and families are told these before they go home.
Follow-up tracks weight as closely as symptoms. A steady weight is a good sign that the blockage will not come back.
| When | What is checked |
|---|---|
| Two weeks. | Wound, weight, food intake, blood salts and symptoms. |
| Six weeks. | Weight trend, how food is tolerated, and a dietitian review. |
| Three and six months. | Weight, symptoms, and whether the cause of the weight loss is under control. |
| Until weight is stable. | Regular dietitian visits. |
| Without an operation. | The same checks; returning symptoms usually mean the weight has dropped again. |
★★★★★
“Fast recovery after a laparoscopic operation by Dr Harsh Shah. Minimum pain & stayed in hospital for 2 days. I will highly recommend the doctor for any Laparoscopic surgery in Ahmedabad.”
Ila Rambhia · Google review
★★★★★
“I am very thankful to Dr. Harsh Shah for treating me for gallstone disease and performing my laparoscopic cholecystectomy. The entire treatment and surgery were handled very professionally. Dr. Harsh Shah explained everything clearly and made me feel comfortable throughout the process. My recovery has been very good, and I am extremely satisfied with the care I received. Highly recommended for laparoscopic and gastrointestinal surgery.”
Akshaya Shaw · Google review
★★★★★
“I must say Dr harsh shah is very calm and humble in nature towards there patient.My wife had been operated by him.Thank you so much sir.Dr harsh shah is expert Gastro surgeon.”
Ashokbhai Brahmbhatt · Google review
Quoted exactly as written on Google. These patients describe keyhole and gastro surgery with Dr Harsh Shah. No review yet names SMA syndrome.
The cost depends on the path you need. Feeding alone costs far less than an operation, so a written estimate is given first.
What moves the estimate is the number of days in hospital for feeding, whether feeding through a vein is needed, whether an operation is done, and any intensive care stay. Dr. Jivraj Mehta Hospital, Vasna, Ahmedabad works with the main insurers and cashless schemes, and its desk handles pre-authorisation for any admission. Please bring every scan and report, your medicine list, your insurance card and an ID. For questions before booking, call +91-63555-64601.
No. It is a pinch of the duodenum between two blood vessels. But a cancer that causes weight loss can set it off, so the cause of the weight loss is always checked.
Not necessarily. Many thin people have a narrow angle and no blockage. The diagnosis needs proof that the duodenum is truly blocked, and other causes ruled out.
Most people do not. Feeding that brings the weight back usually opens the blockage. An operation is offered only when a proper trial of feeding has failed.
Usually several weeks. The fat pad behind the bowel has to build up again, and that takes time. Giving up too early is a common reason for an operation that was not needed.
A drop in blood salts when food returns too fast after a long period of poor eating. It is prevented by starting slowly, giving thiamine first, and checking the salts every day.
Usually a duodenojejunostomy by keyhole surgery. The duodenum above the pinch is joined to the small bowel below it, so food flows around the pinched part.
It can, mainly if the weight drops again. That is why weight checks and dietitian visits continue until the weight is stable.
Dr. Jivraj Mehta Hospital, Vasna, Ahmedabad
Dr. Jivraj Mehta Hospital, Dr Jivraj Mehta Marg, Vasna, Ahmedabad 380007.
Endoscopy and feeding tube placement, nutrition support, keyhole bowel surgery, intensive care and inpatient care.
Google: Dr Harsh Shah · 4.94 · 18 reviews
Directions to Dr. Jivraj Mehta Hospital, Vasna · WhatsApp +91-63555-64601
Patients come to Ahmedabad from across Gujarat, southern Rajasthan and western Madhya Pradesh.
Vomiting after meals, losing weight, or told your CT shows a narrow angle? Your CT, endoscopy report, weight record and blood tests can be sent ahead, so the consultation starts with them already read. The plan is made at the consultation, together with the dietitian and the gastroenterologist. Call +91-63555-64601 · Bring the reports to the visit
Tapping Book on WhatsApp will likely open the WhatsApp app on your phone.
Swasth Parivar: every week, practical advice on recovery, diet and warning signs. No advertising. Stop any time.
Your number is used for these updates and for the clinic to reach you. It is never sold or passed on. To stop, reply STOP on WhatsApp.