A novel negative pressure drainage device

Abstract

The present invention discloses a novel negative pressure drainage device, comprising: a drainage container, an end cap, a drainage tube, a negative pressure tube, a negative pressure adjustment assembly, a negative pressure display assembly, and a negative pressure generation assembly. Compared with the prior art, by means of the provided negative pressure adjustment assembly, the cross- sectional area of the air flow channel of the negative pressure tube can be changed, enabling flexible adjustment of the negative pressure intensity generated by the device. It forms a continuously adjustable range from low negative pressure to high negative pressure, thereby adapting to the drainage needs of different patients; by means of the provided negative pressure display assembly, the current negative pressure value of the device can be displayed in real time and clearly, allowing medical staff to intuitively grasp the dynamic changes of negative pressure without relying on empirical judgment, thus ensuring the stability and safety of the drainage process; by arranging a one-way valve inside the drainage tube, only gastric juice is allowed to flow unidirectionally from the stomach to the drainage container, which effectively blocks the reflux of the drained gastric juice back into the stomach and avoids secondary irritation and damage to the gastric mucosa caused by reflux.