Mustafa, N A Spontaneous knot formation impeding the removal of a silicone urethral catheter. [electronic resource] - Archives of disease in childhood. Fetal and neonatal edition Jul 2006 - F287 p. digital Publication Type: Case Reports; Journal Article ISSN: 1359-2998 Standard No.: 10.1136/adc.2005.086454 doi Subjects--Topical Terms: Catheters, IndwellingDevice Removal--methodsEquipment FailureHumansInfant, NewbornInfant, PrematureLubricationMaleRadiographyRisk FactorsSiliconesUrinary Bladder--diagnostic imagingUrinary Catheterization--instrumentation