紫色尿袋症候群為導尿管留置一段時間後，連袋變紫色之現象。吾人由先前之文獻資料得知。此現象應與連液中氧靛基質硫酸鹽(indoxyl sulfate)經細菌代謝作用後之兩種產物：靛紅質(indirubin)與靛質(indigo)有關。而尿液培養結果常為Providencia與Klebsiella兩菌種之感染。我們報告於門診發現之三起病例，並對紫色尿袋症候群略作回顧與整理。

Purple urine bags or purple urine bag syndrome(PUBS) is purple staining of urine bags, which is due to violet discoloration (indirubin) of the plastic of the catheter bag and fine crystals of indigo in the urine. According to previous studies, the above 2 chemicals are metabolites of indoxyl sulfate in urine infected with Providencia or Klebsiella species. We report 3 cases of PUBS at our-patient department. (J Urol R.O.C., 9:211-214, 1998)