Treatment of Friction Injury Using Enzymatic Debridement and Autologous Skin Cell Suspension

Friction injury occurs when a patient slides across a surface at high velocity, resulting in mechanical abrasion, laceration, and thermal burn. Mechanical abrasion removes tissue to a variable depth depending on surface texture in contact, and thermal burn devitalizes tissue to a variable depth based on contact pressure and transfer of kinetic energy. In these heterogenous wounds, tangential excision can excise healthy tissue alongside devitalized tissue, and other debridement techniques like hydrosurgery or dermabrasion may not reach deeper crevices created by abrasion and laceration. In addition, traditional skin grafts create significant donor site morbidity. This case series presents an early experience with a novel approach using bromelain-based enzymatic debridement combined with autologous skin cell suspension. Bromelain-based enzymatic debridement acts uniformly on a wound surface despite its topography, optimizing removal of devitalized tissue while preserving healthy tissue. Autologous skin cell suspension reduces donor site morbidity. This combined strategy minimizes dressing changes, optimizing pain control and enabling outpatient management. We observe rapid healing and outstanding cosmetic outcomes, and no patients experienced wound infection or other complications or required secondary procedures for nonhealing.