Histologic assessment of mesh fixation following laser-assisted tissue soldering in a lapine model

Abstract

Objective: Wound histology and mesh bioincorporation following intraperitoneal fixation using laser-assisted soldering was evaluated.

Methods: 2.8-3.2 kg NZW rabbits underwent laparotomy. Controls had 2x2 cm segments of Mersilene stapled to peritoneum. Group 2 segments were affixed with 55% collagen solder onlay by fiber-coupled diode laser (1.43 +/- 10 micro, 2.5 W CW, 4 mm spot, 60 degrees C set temperature). Group 4 had Mersilene inlaid into melted solder. Group 3 had solder-embedded Vicryl mesh affixed. Animals were euthanized at 0, 2, 4, 6 weeks. Fixed sections were assessed for integrity, inflammation, and fibrosis using H & E, Masson's Trichrome and Evans Van Gieson staining.

Results: Histology demonstrated cell types, local mesh reaction, and progressive evidence of solder reabsorption mimicking normal healing and bioincorporation. Mersilene groups demonstrated normal arrangement of collagen-rich layers around mesh.

Conclusion: Collagen-based tissue soldering permits normal wound healing and may mitigate use of staples. Further development of this strategy is warranted.