From a patient guide to the AspireAssist, a weight-loss device that was approved by the Food and Drug Administration in June.

Congratulations on beginning your journey with the AspireAssist! If you’re like other patients, you’ve tried many diets that haven’t worked. The AspireAssist is different. If you follow a few basic principles, such as chewing well, drinking plenty of water, and aspirating, it can be the helping hand you need.

After you eat a meal, the AspireAssist allows you to empty 25–30 percent of the contents of your stomach into a toilet. This emptying process is called aspirating. To…