Medical negative pressure drainage device

Abstract

The invention relates to medical instruments, in particular to a medical negative pressure drainage device. The medical negative pressure drainage device comprises a liquid storage tank, a drainage tube and a negative pressure tube, and the drainage pipe and the negative pressure tube are installed on the liquid storage tank. The negative pressure tube is connected with a negative pressure generator. The negative pressure generator comprises a drum and a slip ring. The drum and the slip ring are coaxially arranged, and the drum is rotationally sleeved with the slip ring. An upper water tank and a lower water tank are arranged on the slip ring in an axis symmetry mode. A negative pressure passageway and an exhaust passageway are arranged in the drum. A negative pressure through hole and an exhaust through hole are correspondingly formed in the slip ring. A backboard negative pressure passageway and a backboard exhaust passageway are correspondingly formed in the upper water tank and the lower water tank. According to the negative pressure drainage device, liquid gravity drive is adopted, electric energy is not needed, negative pressure duration is long, pressure is stable, and reliability is high.

Description

technical field [0001] The invention relates to a medical device, in particular to a medical negative pressure drainage device. Background technique [0002] For a variety of patients after surgery, negative pressure drainage is often used to draw the exudate from the wound surface out of the body or negatively compress the small wound wound cavity, which is beneficial to the healing of the wound tissue. This kind of negative pressure drainage requires a long duration of negative pressure, stable and controllable pressure. The working principle of the existing negative pressure drainage device can be divided into two types according to the power source, one is a negative pressure drainage ball driven by manpower or a piston tube type negative pressure generator similar to a syringe, and the other is a pressure generator driven by a motor. Pump negative pressure generator. The manpower-driven negative pressure generator has short duration, unstable pressure, and poor reliab...

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Problems solved by technology

The manpower-driven negative pressure generator has short duration, unstable pressure, and poor reliability. Since the negative pressure chamber and the liquid storage chamber use the same container, the drainage must be temporarily stopped after the liquid storage chamber is filled with fluid, and the liquid storage chamber must be emptied and drained. The device cannot be used continuously and is prone to cross-infection; the pressure pump negative pressure generator lasts for a long time, and the negative pressure chamber and the liquid storage chamber use two different containers respectively, which eliminates the risk of cross-infection, but there is still pressure instability. The problem of poor reliability, once the pressure pump fails, it will affect the normal work of the diverter

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