Gastric Bypass Surgery - Types, Procedure, Indications, and Risks

Introduction:

Gastric bypass is a surgery that helps to lose weight. Gastric bypass surgery is done when diet and exercise have not helped reduce weight or serious health issues because of being overweight. After the surgery, the stomach will be smaller. The food will not go into some parts of the stomach and small intestine that will absorb food. The body will not get all of the nutrients from the food one eats. It is also known as bariatric bypass surgery.

What Are the Types of Gastric Bypass Surgery?

There are various types of gastric bypass surgery:

• Roux-En-Y Gastric Bypass: This is one common type of gastric bypass surgery. Surgery is done under general anesthesia. In this procedure, the surgeon first makes a small stomach pouch by stapling part of the stomach or by vertical banding. Next, the surgeon attaches a Y-shaped portion of the small intestine to the pouch. This limits the amount of food one eats and creates a bypass for food, so it skips part of the digestive system.

• Extensive Gastric Bypass: This is a complicated surgery. In this surgical procedure, the lower part of the stomach is removed. Then the surgeon connects the small pouch that remains to the last part of the small intestine. It works for weight loss, but this surgery is not done widely because it has high complications.

What Are the Ways of Doing Gastric Bypass Surgery?

Gastric bypass surgery can be done in two ways - open surgery and laparoscopic surgery.

In open surgery, the surgeon makes a large open cut in the abdomen. The bypass is done by accessing the organs through the large cut.

Another way is laparoscopic surgery, in which small cuts are made, and a laparoscope with a tiny camera is inserted through these cuts, which are used to see the inside of the belly. Surgical tools are also inserted through the small cuts to perform the surgery. Laparoscopic surgery has advantages like less pain, quicker recovery, and a short hospital stay. The procedure takes about two to four hours.

Who Needs Gastric Bypass Surgery?

Gastric bypass is not done for everyone who is extremely overweight. Doctors use body mass index (BMI) and systemic conditions like diabetes mellitus and hypertension to determine the candidates for weight loss surgery.

The procedure is recommended under the following conditions:

• People with a body mass index (BMI) of 40 or more. Someone with a BMI of 40 or more is at least 45kgs higher than the recommended body weight.

• A body mass index (BMI) of 35 or more and a serious medical condition like type 2 diabetes, hypertension, and obstructive sleep apnea.

What Happens Before the Surgery?

• Before the surgery, a complete physical examination is done.

• Blood tests and ultrasound are done to confirm the eligibility for surgery.

• Medical problems such as diabetes and blood pressure should be under control.

• A urine catheter is placed in the bladder to drain urine.

• Quit smoking a few weeks before the surgery.

• Inform the doctor about pregnancy and the vitamin and herbal supplements one is taking.

• Inform the doctor about the medications that one is taking, such as blood thinners like Aspirin, Clopidogrel, and Warfarin. These drugs should be stopped for a few days before the surgery.

What Happens After the Surgery?

Patients will stay in the hospital for one to four days after the surgery. The patient can not eat for one to three days after the surgery. After that, liquid foods are first given, and then solid foods are introduced. Special stockings are worn on the leg to prevent the formation of blood clots. Painkillers and antithrombotics are given.

What to Eat After the Surgery?

Gastric bypass surgery reduces the size of the stomach and changes the way food enters the intestine. After surgery, it is important to get enough nutrients while maintaining the weight-loss goals on track.

• Eat and Drink Slowly: Eat the meals for at least 30 minutes and take 30 to 60 minutes to drink one cup of liquid. This can avoid dumping syndrome. One may have to wait for 30 minutes before or after each meal to drink liquids.

• Keep Meals Small: Eat multiple numbers of small meals a day. Start with six meals a day, then four meals, and finally, regular, three meals.

• Drink Liquids Between Meals: Drink at least eight cups (1.9 liters) of fluids a day to prevent dehydration. But do not drink more fluids during mealtime.

• Chew Food Thoroughly: Eat small bites of food and chew them thoroughly before swallowing to avoid blockages in the new opening from the stomach to the intestine.

• Focus On High-Protein Foods: Eat protein-rich foods.

• Avoid Foods That Are Rich in Fat and Sugar Content: These foods can cause dumping syndrome.

• Take Recommended Vitamin and Mineral Supplements: Multivitamin supplements are taken daily for the rest of the life.

What Is the Duration of Gastric Bypass Surgery?

The surgery typically lasts between two to four hours. Following the procedure, individuals will likely stay in the hospital for about two days. During this time, they will not be able to consume solid foods.

How Long Does It Take to Recover From Gastric Bypass Surgery?

After gastric bypass surgery, individuals will probably spend a day recovering in the hospital, followed by several weeks recovering at home before feeling prepared to return to work. Strenuous activities may need to be avoided for up to six weeks, and it could take as long as twelve weeks to transition back to a normal diet.

What Are the Risks of Gastric Bypass Surgery?

Gastric bypass is a major surgery, and it has many risks.

• Pouch Stretching: The stomach stretches and changes to its original position over time.

• The staples fall apart.

• Allergic reactions to anesthesia.

• Gastritis, stomach ulcers, or heartburn.

• Injury to the stomach, intestine, or other organs during surgery

• Nutritional, vitamin, and mineral deficiencies.

• Stomal Stenosis: A narrowing at the connection of the stomach and small intestine causing nausea and vomiting

• Gastric bypass surgery also causes a dumping syndrome, in which the food moves too quickly from the stomach to the small intestine.

How Much Weight Can Be Expected to Be Lost Through Gastric Bypass Surgery?

Gastric bypass surgery can lead to significant and sustained weight loss. The amount of weight an individual loses will vary based on the type of surgery and the adoption of healthier lifestyle habits. Typically, it is feasible to lose approximately 70 % or more of the excess weight within two years.

What Is the Alternative for Gastric Bypass Surgery?

Endoscopic sleeve gastroplasty is a newer type of weight-loss procedure. This is a minimally invasive procedure. The procedure uses a flexible tube attached to a camera and an endoscopic suturing device. The endoscope is inserted down the throat into the stomach.

The doctor places sutures in the stomach using the endoscope. The sutures change the stomach making it smaller. This restricts the amount of food one eats.

Conclusion:

Gastric bypass can provide long-term weight loss. The surgery also improves daily activities and the quality of life. It improves or resolves health conditions related to overweight issues. This surgery is irreversible in most cases.