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Updated: Oct 17, 2025

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection
Published on: October 12, 2017
[About the purple urine bag syndrome]
C Counasse1, P Vanderweckene2, J M Krzesinski3
1Service de Médecine de l'Appareil locomoteur, CNRF, CHU Liège, Belgique.
Abstract:
Urine staining is described as a clinical sign due to the presence of some diseases. The purple colour is rare and can be worrisome. It has only been described in a syndrome called Purple Urine Bag Syndrome (PUBS). This coloration is the result of a urinary tract infection in patients with an indwelling catheter for a long time. An overview of the mechanisms causing this syndrome and of its management and prognosis will be discussed in this short communication.
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