Gastric Balloon

What a gastric balloon is

A gastric balloon is a soft silicone device placed inside the stomach and filled with sterile fluid (in some designs, air). By occupying space, it means a smaller meal produces a sense of fullness, and that fullness lasts longer. The balloon stays in place for a defined period and is then removed.

In the usual technique the balloon is passed through the mouth under endoscopic guidance and inflated once in position. Some devices are designed as swallowable capsules instead. Which type is appropriate depends on the individual and on what endoscopic assessment shows. It is worth being clear: this is not surgery, and it makes no permanent change to the anatomy of the stomach.

Where the balloon fits in obesity treatment

Obesity is a chronic disease in which fat accumulation harms health — it is not a matter of appearance. Its treatment spans dietary change, physical activity, medication where appropriate, and surgery for selected patients. The gastric balloon sits between those steps as a temporary, supportive option rather than a definitive treatment.

The fullness the balloon creates opens a window in which changing eating habits becomes easier. Whether that window produces anything lasting depends entirely on what is learned and established during it. Placing a balloon without a structured nutritional programme alongside it is not a sound approach, and we would not recommend it.

Who might be a candidate

A balloon is usually considered for patients whose excess weight is affecting their health but who do not meet the criteria for bariatric surgery, or for whom diet and exercise have not produced an adequate result. It is also sometimes used as a preparatory step in patients with very high BMI, to reduce operative risk before a planned operation.

It is not suitable for everyone. Previous stomach surgery, an active ulcer, a large hiatal hernia, certain swallowing disorders, bleeding tendencies and pregnancy may all rule it out. Endoscopic assessment and a full consultation therefore come first. Whether a balloon is appropriate in your case can only be determined after that assessment.

• Excess weight affecting health where surgical criteria are not met
• Diet and exercise have not produced an adequate result
• As preparation before surgery in selected patients with very high BMI
• No endoscopic finding that makes placement unsafe
• Willingness to follow the dietary programme and attend review appointments

How the procedure is done

Placement is usually carried out under sedation in an endoscopy unit. The stomach is examined first; if there is no ulcer, inflammation or hernia that would make placement unwise, the balloon is passed through the mouth and filled with sterile fluid. The procedure generally takes less than half an hour and most patients go home the same day.

Removal follows a similar route: under sedation, the balloon is deflated endoscopically and withdrawn through the mouth. Some capsule-type balloons are designed to empty on their own at the end of their lifespan and pass naturally through the digestive tract. Which device is used therefore also determines how it comes out.

The first days, eating and follow-up

Nausea, vomiting, cramping and a sense of pressure are common in the first days after placement — this is the stomach adjusting to something that was not there before. Medication is prescribed to help, and eating starts with liquids before progressing in stages. Symptoms usually settle within a few days, though how quickly varies considerably.

Throughout the period with the balloon in place, adherence to the dietary programme is what determines the outcome: small portions, eating slowly, protein-first meals, and avoiding sugary and carbonated drinks. Dietitian appointments and scheduled reviews are part of the treatment, not extras. If symptoms persist or something unexpected develops, the balloon may need to be removed earlier than planned.

What happens after the balloon comes out

The effect of a balloon lasts as long as the balloon does. Once it is removed, appetite and satiety return to their previous pattern, so if no durable habits have been established in the meantime, regaining weight is the expected outcome rather than a surprise. This is a time-limited support, not a permanent solution, and that should be clear before anyone commits to it.

Follow-up therefore continues after removal: the nutrition and activity programme carries on, reviews are scheduled, and other options are reassessed if needed. In some patients the discussion at that point turns to bariatric surgery. Which route suits you is decided together, after examination and investigation.