title: Knotting of urethral catheter within bladder: an unusual complication in cystourethrography.
abstract: Complications in voiding cystourethrography are infrequent and may include infection, catheter-induced trauma, bladder rupture, and allergic reaction to contrast. We report a case in which the catheter formed a knot within the bladder lumen. To our knowledge, this is the first complication of this type to be reported. We believe this particular complication can be avoided by inserting a catheter within the bladder lumen short enough to prevent looping and possible knot formation.
mesh_terms: D002408:Catheters, Indwelling; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D011859:Radiography; D014521:Urethra / Q000000981:diagnostic imaging*; D001743:Urinary Bladder / Q000000981:diagnostic imaging*; D014546:Urinary Catheterization / Q000009:adverse effects*