Tail end fine gradient decompression air bag nephrostomy drainage catheter

The invention discloses a tail end fine gradient decompression air bag nephrostomy drainage catheter and relates to a medical device used in nephrostomy support drainage. The tail end fine gradient decompression air bag nephrostomy drainage catheter comprises a nephrostomy tube and a connector. The nephrostomy tube comprises a short, bent and wound fine pipe part and a long drainage thick tube part connected with the fine tube part. The tail end of the nephrostomy tube is bent, and the nephrostomy tube is wound on a collecting system and can also be placed at the upper section of a ureter. By inflating an air bag, the nephrostomy tube can be prevented from sliding out. In the removing process, if nephrostomy channel bleeding occurs, the nephrostomy tube can be inserted back quickly; when the nephrostomy channel bleeding occurs, by inflating the air bag and pulling an oppressed wound, patients' bleeding is reduced, and time is gained for follow-up treatment. For a patient having undergone pertacuneous nephroli