The use of Nexobridtm in debriding chronic ulcers: a preliminary observational study.

Nexobrid is a highly selective enzymatic debriding agent used in the acute management of burns to perform escharectomy. From October 2016 to April 2017, we treated 6 patients affected with lower limb chronic ulcers of different etiologies with Nexobrid in order to perform eschar removal by enzymatic debridement. For all patients, a dosage of Nexobrid, calculated as 2gr per 1% TBSA, was applied in a 2-3 mm thick uniform layer on the ulcer eschar and fibrin tissue and left for 4 hours, covered with an occlusive dressing. Patients were assessed in terms of ulcer cleansing 24 hours and 7 days post Nexobrid debridement, by wound bed score (WBS) and % of remaining necrotic tissue. A patient pain VAS was also recorded at 24 hours and 7 days post debridement. Adverse events at these time points were also noted. The results documented a complete removal of necrotic tissue in a time frame of 4 hours. At 24 hours, all lesions were completely debrided. At 7 days, there was a partial recurrence of necrotic tissue, as also documented by decreased WBS. All patients reported none to mild pain, and no adverse events were noted, except for mild erythema along the edges of the lesion on healthy skin in one case. This is a preliminary observation. Optimal dosage and application of Nexobrid in this indication needs to be validated by further controlled data.