A method and system of controlling medical suction is disclosed. The system comprises a vacuum regulator comprising a valve, wherein the first end of the regulator may be fluidly connected to a vacuum source and the second end of the regulator may be fluidly connected to a patient interface. The valve may comprise a small orifice or pathway, allowing fluid to pass from the second end of the regulator to the first end of the regulator while the valve is closed. The system may also comprise a flow detector, wherein the flow detector is capable of sensing when the patient interface is in contact with a liquid and cause the valve to open, thereby allowing full flow of fluids from the second regulator end to the first regulator end.
