The present invention provides a urinary catheter bypass device that can supply a cleaning solution or medicament to only one of a renal catheter or a bladder catheter of a urinary bypass device or aspirate and collect urine via a relay adapter. The catheter bypass device 1 includes a renal catheter 3, a bladder catheter 5, a relay adapter 7, and an extrusion device 16. The pressing device 16 is provided with a pair of pressing faces that can be pinched and pressed by a finger of one hand in a state where the catheter bypass device 1 is left in the abdomen. The pressing member 16 is compression-deformed by pinching a pair of pressing faces with a finger, thereby applying a pressing force to the outer peripheral portion of the middle portion of the kidney catheter 3 in the longitudinal direction via the pressing device 16, whereby the renal catheter 3 is The flattening blocks the flow path in the renal duct 3. This flow path is opened by releasing the pressing force.本創作提供一種尿管旁通裝置，其可經由中繼轉接器僅對尿管旁通裝置之腎臟導管或膀胱導管中之一導管供給洗淨液或藥劑或者抽吸並採集尿。 尿管旁通裝置1具備腎臟導管3、膀胱導管5、中繼轉接器7及擠壓具16。擠壓具16具備可於尿管旁通裝置1留置於腹部內之狀態下利用單手之手指經皮地捏住並進行擠壓之一對擠壓面。利用手指經皮地捏住一對擠壓面而使擠壓具16壓縮變形，從而經由擠壓具16對腎臟導管3之長度方向中途部之外周部賦予擠壓力，藉此腎臟導管3被壓扁而將腎臟導管3內之流路堵塞。該流路係藉由解除擠壓力而開放。
