Adjustable hydrodynamic negative pressure diverter

Abstract

The invention relates to a medical device, in particular to an adjustable hydrodynamic negative pressure drainage device. It includes a liquid storage tank, a drainage tube installed on the liquid storage tank, and a negative pressure tube. The negative pressure tube is connected to a negative pressure generator. The negative pressure generator includes a coaxial drum, which is rotatably set on the drum The upper water tank and the lower water tank are symmetrically arranged on the upper axis of the slip ring, and the negative pressure channel and the exhaust channel are arranged in the drum; the negative pressure through hole and the exhaust through hole are correspondingly arranged on the slip ring, and the upper water tank A backplane negative pressure channel and a backplane exhaust channel are correspondingly arranged in the lower water tank. The negative pressure diverter is driven by liquid gravity, does not require electric energy, has long negative pressure duration, stable pressure and high reliability.

Description

technical field [0001] The invention relates to a medical device, in particular to an adjustable hydrodynamic 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 type negative pressure generator. The human-driven negative pressure generator has short duration, unstable pressu...

AI Technical Summary

Problems solved by technology

The human-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, it cannot be used continuously and is prone to cross-infection; the pressure pump negative pressure generator has a long duration , the negative pressure chamber and the liquid storage chamber use two different containers respectively, which eliminates the risk of cross-infection, but there are still problems of unstable pressure and poor reliability. Once the pressure pump fails, it will affect the normal operation of the drainage device

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