Disposable pleuroperitoneal cavity puncture indwelling catheter

The disposable pleuroperitoneal cavity puncture indwelling catheter comprises a built-in drainage tube, a water bag is arranged in the middle section of the built-in drainage tube, the water bag is fixed to the periphery of the tube wall of the middle section of the built-in drainage tube in a semi-surrounding mode and forms a water bag area with the middle section of the built-in drainage tube, the tail end of the water bag is connected with a single tube, and the tail end of the single tube is provided with a water bag connector. A drainage tube connector is arranged at the tail end of the built-in drainage tube; according to the disposable pleuroperitoneal cavity puncture indwelling catheter, after conventional abdominal cavity or thoracic cavity puncture catheterization succeeds, the built-in drainage tube is indwelled, sterile normal saline is injected into the water bag through the water bag connector, the catheter is more tightly fixed to the chest wall or the abdominal wall or a puncture needle passag