DISPOSABLE WORKING CANNULA FOR BLADDER PUNCTURE

摘要

A disposable working cannula for bladder puncture includes a spindle puncture device (2) having a prolately spindle hollow structure which is formed by detachably splicing four separate plates. Three elastic pipelines (3) are close connected serially. The middle elastic pipeline (3) is arranged in the cavity of the spindle puncture device (2). A housing of the spindle puncture device is divided into two halves which are oppositely placed in the elastic pipelines (3) at two sides respectively. The lower ends of the three elastic pipelines (3) are embraced and covered by an air bag (4), and the air bag (4) communicates with a unidirectional gas injection valve (6) through connecting line.