1 week post op of gastric balloon; Is it safe to lose this much weight this fast?

it is hard to tell without actually seeing and examining a patient. Most of my patients come in for follow 6 days post procedure. Rapid weightloss is possible and it is not necessarily dangerous. However I suggest you schedule a post op visit with your physician.

Most patients will lose close to 10lbs in the first week, because of initial fluid losses and because we ask them to follow a liquid diet for a full 7 days, while adjusting to the balloon. Losing 22lbs in a week would indicate to me that you are potentially very dehydrated. It's very important to stay in close contact with your physician during the first 1-2 weeks to avoid dehydration. After the first 1-2 weeks, we anticipate a more modest but steady weight loss of 1-3 lbs per week.