Some of the problems that affect the world include obesity. One form of surgery that can be performed on an individual who wants to lose weight is Laparoscopic Sleeve Gastrectomy. This is one of the surgeries that can be performed on an individual who wants to lose weight. A balloon-assisted gastric calibration tube is a medical device that is employed during the procedure of sleeve gastrectomy. The medical device is employed for the purpose of stomach sizing and stomach calibration. The medical device consists of an adjustable distal balloon that expands within the stomach for stomach stabilization and an inner lumen that allows for suction, stomach decompression, and testing of leaks. Gastric calibration is an important aspect of the procedure of sleeve gastrectomy. It is essential to obtain an optimal stomach size and minimize the risk of complications. However, it is a challenge to ensure that devices are stably placed during surgical procedures. The article presents a description of the design as well as an in vitro assessment of the proposed balloon-assisted gastric calibration tube. The experiments were conducted using a gastric anatomical model to test device insertion through the orogastric path, as well as balloon expansion and stability. The results showed that it is possible to stably position the device within the stomach as well as expand the balloons while utilizing the central lumen for suction as well as leak testing. The results suggest that the proposed device has the potential to improve stability and consistency during calibration procedures in a sleeve gastrectomy.