Chemically assisted capsulectomy in the rabbit model: a new approach.

Capsular contracture remains the most common adverse sequela of aesthetic and reconstructive breast surgery when breast implants are used. Capsulectomy may be technically difficult and can result in damage to the neighboring tissues. The aim of this study was to verify the efficacy of sodium 2-mercaptoethane sulfonate (mesna) as a facilitator of periprosthetic dissection when instilled locally at the time of capsulectomy. Two 40-cc textured saline implants were placed dorsally into each of 20 rabbits. After 5 months, capsulectomy was performed after the removal of the implants. Mesna was used to highlight the junction between scar and normal tissue and to help separate the tissues during the capsulectomy in one of the two capsules in each rabbit. Saline was used for the same purpose in the other. The blood loss, duration of operation, and difficulty of dissection as experienced by the surgeon were recorded during the course of the operation. The capsules were also examined histologically for their thickness and graded according to their degree of intactness at the conclusion of the procedure. The histological grading based on the intactness of the removed capsule (p = 0.005), the operating time (p = 0.003), and the subjective evaluation of the difficulty of the procedure (p = 0.003) were significantly better in the mesna group. There was no significant difference in the blood loss between the two groups. Because of its ability as a chemical dissector, mesna may be a useful aid in capsulectomy. Clinical studies to confirm this evidence are required.