Gastric Bypass Surgery
Gastric bypass surgery is considered one of the surgical procedures performed for individuals suffering from obesity, with the goal of weight loss. It helps patients lose approximately 60–80% of excess weight. In most cases, this procedure is performed using laparoscopic (minimally invasive) techniques, which help reduce pain associated with surgery, speed up recovery, and shorten the hospital stay.
After discharge, the patient must follow the provided medical instructions carefully to improve weight loss outcomes and reduce the risk of complications.
How Gastric Bypass Surgery is Performed
This surgical procedure typically takes between 2–4 hours. During the operation, the surgeon follows these steps:
- The patient is given general anesthesia, so they are asleep and feel no pain during the procedure.
- The stomach is divided into two parts: a small upper portion and a larger lower portion. After eating, food goes into the small upper part (gastric pouch), which can hold only about 28 grams of food or 30 ml of liquid. This limits food intake and promotes weight loss.
- The surgeon connects the small upper stomach pouch to a section of the small intestine through a small opening. This allows food to bypass part of the stomach and move directly into the small intestine. This step reduces calorie absorption and is known as the “bypass.”
The procedure can be performed either through open surgery (with a large incision) or laparoscopically using a small camera inserted into the abdomen.
Eligibility Criteria for Gastric Bypass Surgery
This procedure is not suitable for everyone. Certain conditions must be met, including:
- Failure to lose weight through diet and exercise
- Body Mass Index (BMI) of 40 or higher
- BMI of 35 or higher with obesity-related health conditions such as:
- High blood pressure
- Type 2 diabetes
- Sleep apnea
- Excess weight of about 45 kg or more above ideal weight for men, or 36 kg or more for women
Risks and Complications of Gastric Bypass Surgery
Despite its effectiveness, the procedure may lead to some risks and complications, including:
- Dumping Syndrome: Food moves too quickly from the stomach to the small intestine, causing symptoms such as sweating, nausea, diarrhea, fainting, and weakness
- Enlargement of the Gastric Pouch: The stomach pouch may stretch over time and return closer to its original size
- Stomal Stenosis: Narrowing of the connection between the stomach and intestine, causing nausea, reflux, vomiting, and difficulty eating
- Gallstones: May develop due to rapid weight loss
- Nutritional Deficiencies: Reduced absorption of vitamins, minerals, and other nutrients
- Staple Line Failure: Breakdown of the staples used to divide the stomach
Preparation for Gastric Bypass Surgery
Several important steps are taken before the procedure, including:
- The doctor explains the procedure in detail and allows the patient to ask questions
- The patient signs a medical consent form after understanding the procedure
- A full physical examination is conducted, along with a review of medical history
- Additional tests may be required, such as blood tests and diagnostic imaging
- A pregnancy test is performed for women, and pregnancy is discouraged during the first year after surgery due to risks
- The patient must fast for at least 8 hours before surgery
- The doctor must be informed about all medications, supplements, allergies, or bleeding disorders
- The patient is advised to start exercising and follow a healthy diet several weeks before surgery
This comprehensive preparation helps ensure the best possible outcome and reduces potential risks associated with the surgery.