A noninvasive device/collection of noninvasive devices designed to convert positive gas pressure from a compressed gas supply, into negative pressure (the Venturi principle) for the evacuation of fluids, mucus, or solids during a range of clinical applications (e.g., not dedicated to thoracic suction). The device is designed to be connected to the gas supply (e.g., air, oxygen cannister) to achieve controlled continuous and/or intermittent suction at variable levels. It includes a manometer, an activation knob, and may include collection containers or tubing; it does not include patient contact devices (e.g., handpiece/tip, catheter).