A non-symmetrical drainage device for being placed in the ureter for drainage which comprises a guide tube of which an end is crimped to form a bladder crimped part and the other end is crimped to form a renal pelvis crimped part, and the bladder crimped part is in communication with the renal pelvis crimped part. The bladder crimped part is for being placed and locked in the bladder while the renal pelvis crimped part is for being placed and locked in the renal pelvis, wherein the crimping diameter of the renal pelvis crimped part is greater than that of the bladder crimped part, and the crimping diameter of the bladder crimped part is less than 1 cm in such a matter that the effects of stability and comfort are achieved as the non-symmetrical drainage device is placed in the body.一種非對稱性之引流裝置,用以放入輸尿管以進行引流,引流裝置包含一本體導管,於一端捲曲形成有一膀胱迴圈部,並於另一端捲曲形成有一腎盂迴圈部,且膀胱迴圈部與腎盂迴圈部為相連通,膀胱迴圈部供設置於一膀胱內而卡固於膀胱,而腎盂迴圈部供設置於一腎盂內而卡固於腎盂,其中腎盂迴圈部之捲曲直徑大於膀胱迴圈部之捲曲直徑,且膀胱迴圈部之捲曲直徑小於1公分,藉此達到設置於體內的穩固性及舒適感之效果。1‧‧‧本體導管11‧‧‧膀胱迴圈部111、121‧‧‧引流通孔12‧‧‧腎盂迴圈部D1、D2‧‧‧捲曲直徑
