Definition: Gastropneumatic is a type of pneumatic system used in medical equipment to control and manipulate the air pressure inside a device, such as a tube or valve. It works by using the pressure difference between two surfaces that are connected through a flexible tubing or wire. In general, gastropneumatic systems are used in medical applications for controlling air flow, providing ventilation, and regulating air pressure within devices like ventilators, pumps, valves, and other medical equipment.