自1989年十二月1990年六月我們共收集了13位長期放置膀胱造瘻導尿管的男性病患作尿液分析、細菌培養、導尿管培養及電子顯微鏡觀察。13位病人中11位人有尿液感染，並培養出細菌，以pseudomonas及citrobacter最常見，12位病人之導尿管可以培養出細菌，其中以proteus、pseu-domonas及citrobacter最常見，9條導尿管在電子顯微鏡下觀察都有結石附於導尿管上，其中以apatite及struvite佔大多數，另外有6例可直接看到細菌，導尿管表面也有菌落，同時在導尿管內形成厚的痂垢，由我們的研究顯示，導尿管培養比尿液培養及電子顯微鏡觀察有較高的發現率。所以長期放置膀胱造瘻導尿管的病人，因導尿管引發的尿路感染，其抗生素的選擇應以導尿管細菌培養的結果為依據。

From Dec. 1989 to June 1990, we have collected 13 male patients with long term suprapubic cystostomies. Their urine were examined and cultured. The catheters itself were cultured and observed under scanning electron microscopy. Eleven of 13 pa-tients had infected urine. Bacteria can be isolated form urine culture in 11 of 13 cases, the commontst bacterial species were pseudomonas and citrobacter. Twelve of the 13 Foley catheters can get positive results, proteus, pseudomonas and citrobacter were the commonets isolated bacteria. Under scanning electron microscopic examination, all of the tips of the Foley catheters had crystal deposit. The majorities of crystals were qpatite and struvite. Bacteria can be seen in 6 if the 9 examined catheters. Bac-teria had colonized on the surface of the catheters and formed a thick layer on the luminal surface of the catheters. Our results showed that Foley cantheter culture can get higher positive rete than both urine culture and scanning electron microscopic examina-tion in finding the bacteria. Adequate antibiotic treatment of uninary tract infection in patients with long trem suprapubic catheteriazation should base on the results of catheter culture.