Treating pressure ulcers with clostridial collagenase ointment: Results from the US Wound Registry.

We assessed the clinical effectiveness of clostridial collagenase ointment (CCO) as an adjunct to selective debridement compared with selective debridement alone for the management of stage IV pressure ulcers (PU) in the hospital outpatient department setting. Outcome data were derived from retrospective de-identified electronic medical records from 2007 to 2013 using the US Wound Registry. A propensity score method was used to adjust for selection bias and to test for treatment effect between PU treated with CCO plus selective debridement vs. selective debridement alone. A total of 337 CCO and 336 non-CCO stage IV PU were identified. The proportion of wounds closed at any time (e.g., at 1 or 2 years) was two times greater for stage IV PU treated with CCO compared with those not treated with CCO. Kaplan-Meier analysis showed that time to wound closure at 1 year was significantly faster for PU treated with CCO vs. PU not treated with CCO. Among those with five or more CCO applications or selective debridement treatments, significantly more CCO-treated PU were closed at 1 or 2 years than non-CCO-treated PU. CCO as an adjunct to selective debridement improved clinical outcomes and provided faster rates of closure of stage IV PU relative to selective debridement alone.