Learn About Gastric Balloon Weight Loss Options

What Is a Gastric Balloon and How Does It Work

A gastric balloon is a medical device placed inside the stomach to help people lose weight. The procedure involves inserting a deflated balloon through the mouth and down the esophagus into the stomach. Once positioned correctly, doctors fill the balloon with a sterile saline solution, saltwater, or sometimes gas. The filled balloon takes up space in the stomach, which makes a person feel full more quickly when eating smaller amounts of food.

The balloon itself is typically made of silicone or similar flexible material. It measures about the size of a grapefruit when inflated. The procedure usually takes 20 to 30 minutes and does not require surgery or general anesthesia, though doctors may use sedation to make patients more comfortable. This is called an endoscopic procedure because doctors use a thin, flexible tube with a camera called an endoscope to see inside the stomach during placement.

Different types of gastric balloons exist on the market. Some balloons stay in the stomach for six months, while others may remain for different durations. The Orbera balloon, for example, is filled with saline and is designed to stay in place for six months. The Obalon system uses a gas-filled balloon and may involve placing multiple balloons. The ReShape Duo balloon holds two chambers and can remain in the stomach for up to six months as well. Each type has specific characteristics regarding how they are inserted, what they are filled with, and how long they last.

The balloon works through a simple principle: it reduces the amount of space available in the stomach. When space is limited, people tend to eat smaller portions because they feel satisfied sooner. This creates a calorie deficit, which can lead to weight loss over time. The balloon itself does not burn calories or change how the body processes food. Instead, it serves as a physical reminder to eat less by creating a sense of fullness.

Practical takeaway: Understanding that a gastric balloon is a temporary device that creates physical fullness—not a surgical procedure or permanent change—helps people decide if this option matches their weight loss goals and lifestyle.

Who Might Consider a Gastric Balloon

Gastric balloons are typically considered for people who have not had success with diet and exercise alone but may not be candidates for weight loss surgery. People interested in this option usually fall within certain weight categories. Many patients have a body mass index (BMI) between 30 and 40, though some physicians may consider balloons for people outside this range depending on individual circumstances. A BMI of 30 or higher is generally classified as obese, and a BMI between 25 and 29.9 is classified as overweight.

The procedure may appeal to people who want a less invasive option than bariatric surgery. Bariatric surgeries like gastric bypass or gastric sleeve involve permanently altering the stomach, which carries surgical risks and is not reversible. A gastric balloon, by contrast, can be removed and does not change the stomach's structure. This makes it attractive for people who are hesitant about permanent surgical changes or who want to try a reversible option first.

Candidates should be motivated to make lifestyle changes including eating healthier foods, consuming smaller portions, and increasing physical activity. The balloon itself does not change eating habits or food preferences. Success depends largely on the individual's commitment to eating less and making better food choices. People who expect the balloon to work without behavioral changes may not see results.

Certain health conditions or medications may affect whether someone can safely have a gastric balloon placed. People with severe acid reflux, large hiatal hernias, or certain stomach conditions should discuss this with their doctor. People taking blood thinners or having bleeding disorders should inform their physician. Additionally, people with a history of stomach ulcers or inflammatory bowel disease may have concerns. Pregnancy is a contraindication, meaning the procedure should not be done during pregnancy or when pregnancy is planned in the near future.

Age can be a factor as well. Most procedures are performed on adults, though some physicians may consider balloons for older teens in certain situations. Conversely, there is typically an upper age limit, though this is often based on overall health rather than age alone. A thorough medical evaluation helps determine individual suitability.

Practical takeaway: People considering a gastric balloon should have realistic expectations about their role in the weight loss process and be prepared to make significant dietary and lifestyle changes for the procedure to be effective.

The Gastric Balloon Placement Procedure and What to Expect

The gastric balloon placement procedure typically occurs in a hospital endoscopy center or outpatient surgical facility. On the day of the procedure, patients usually cannot eat or drink anything after midnight the night before. This fasting period ensures the stomach is empty, which gives doctors a clear view and reduces the risk of complications.

When the procedure begins, medical staff will place an IV line to administer sedation. The sedation helps patients relax and may make them drowsy, though they are not fully asleep during the procedure. The doctor will then spray the back of the throat with a numbing medication to suppress the gag reflex. Patients are asked to lie on their left side.

The endoscope—a thin, flexible tube with a light and camera at the tip—is gently passed through the mouth, down the esophagus, and into the stomach. The doctor watches on a monitor to see inside the stomach. The deflated balloon is threaded through the endoscope. Once the balloon tip enters the stomach, the doctor carefully positions it in the correct location. The endoscope is then withdrawn partially, and the balloon is filled with the saline solution or gas through a small tube. The filling process takes several minutes. Once filled to the appropriate size, the filling tube is removed and the endoscope is withdrawn completely.

The entire procedure typically lasts 20 to 30 minutes. After the procedure, patients spend time in a recovery area where medical staff monitor them. Patients may feel drowsy from the sedation and should not drive or operate machinery for the remainder of the day. Patients typically return home the same day, though some facilities may recommend an overnight stay for observation.

In the days following placement, patients may experience nausea, vomiting, abdominal cramping, or discomfort. These symptoms are common as the stomach adjusts to the presence of the balloon. Doctors typically prescribe anti-nausea medications and may recommend dietary adjustments during this adjustment period. Symptoms usually improve within a few days to a week. Patients should contact their doctor if symptoms persist or worsen.

Practical takeaway: Understanding that balloon placement is a brief, non-surgical procedure with a same-day recovery helps people prepare mentally and logistically for the appointment.

Weight Loss Results and Timeline

Weight loss with a gastric balloon is typically gradual rather than dramatic. Research studies show that people with a gastric balloon lose on average 10 to 15 pounds per month during the time the balloon is in place, though individual results vary considerably. Some people lose more, and some lose less. The amount of weight loss depends on many factors including starting weight, how strictly a person follows dietary recommendations, exercise habits, and individual metabolism.

Total weight loss over the six-month period that many balloons remain in place typically ranges from 50 to 100 pounds, though again this varies. A person who weighs 300 pounds might lose 50 to 70 pounds, while someone who weighs 250 pounds might lose 40 to 60 pounds. These are approximate ranges based on published studies, and individual outcomes cannot be predicted.

The timeline for weight loss generally follows a pattern. In the first few weeks after balloon placement, weight loss may be minimal or even absent as the body adjusts. Once adjustment occurs, weight loss typically accelerates. The middle months of the balloon placement period usually show the most consistent weight loss. As the balloon has been in place for several months, some people may experience a plateau where weight loss slows or stops temporarily.

After balloon removal, maintaining weight loss becomes critical. Studies show that many people regain some weight after balloon removal if they do not continue healthy eating habits and exercise. However, people who have successfully lost weight and continue with the lifestyle changes they made during the balloon period often maintain a significant portion of their weight loss long-term. Some research suggests that people maintain 50 to 75 percent of their weight loss one to two years after balloon removal if they continue their healthy habits.

The balloon is temporary, which means weight loss is