Catheter

The utility model provides a catheter, including washing the drainage tube, should wash and set up first gas injection pipe and flushing pipe on the rear portion pipe wall of drainage tube, should wash and set up first gas injection hole on the anterior pipe wall of drainage tube, flushing hole and wash the drainage hole, this first gas injection pore pair should be provided with first gasbag intercommunication on the drainage tube outer wall with washing, this first gas injection pipe, the flushing pipe with wash the drainage tube respectively through first gas injection passageway, irrigation channel with wash diversion channels and come to correspond the first gas injection hole of intercommunication, flushing hole and wash the drainage hole, and this first gas injection passageway andirrigation channel parcel are in washing diversion channels, the intercommunication has first auxiliary tube on washing the drainage tube, should wash is provided with the second gasbag on the drainage tube inner wall, the po