Abstract:The appearance of purple coloured urine within the Urethral Catheter-Urine Bag system is often frightening to patients and their relatives and gets health care givers perplexed. The purple colour is said to be a by-product of chemical transformation of indole to indigo or indirubin, or a mixture of the two. Both Indigo and Indirubin are derivatives of colonic bacterial metabolism of dietary Tryptophan using either the Sulphatase or Phosphate enzymes or both. It is seen in chronically ill patients with chronic … Show more
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