Sutureless closure of scleral wounds in animal models by the use of laser-welded biocompatible patches

Francesca Rossi; Paolo Matteini; Luca Menabuoni M.D.; Ivo Lenzetti; Roberto Pini

doi:10.1117/12.874471

11 February 2011 Sutureless closure of scleral wounds in animal models by the use of laser welded biocompatible patches

Francesca Rossi, Paolo Matteini, Luca Menabuoni M.D., Ivo Lenzetti, Roberto Pini

Proceedings Volume 7885, Ophthalmic Technologies XXI; 78850P (2011) https://doi.org/10.1117/12.874471
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

The common procedures used to seal the scleral or conjunctival injuries are based on the traditional suturing techniques, that may induce foreign body reaction during the follow up, with subsequent inflammation and distress for the patient. In this work we present an experimental study on the laser welding of biocompatible patches onto ocular tissues, for the closure of surgical or trauma wounds. The study was performed ex vivo in animal models (porcine eyes). A penetrating perforation of the ocular tissue was performed with a surgical knife. The wound walls were approximated, and a biocompatible patch was put onto the outer surface of the tissue, in order to completely cover the wound as a plaster. The patches were prepared with a biocompatible and biodegradable polymer, showing high mechanical strength, good elasticity, high permeability for vapour and gases and rather low biodegradation. During preparation, Indocyanine Green (ICG) was included in the biopolymeric matrix, so that the films presented high absorption at 810 nm. Effective adhesion of the membranes to the ocular tissues was obtained by using diode laser light emitted from an 810 nm diode laser and delivered by means of a 300 μm core diameter optical fiber, to produce spots of local film/tissue adhesion, due to the photothermal effect at the interface. The result is an immediate closure of the wound, thus reducing post-operative complications due to inflammation.

Citation Download Citation

Francesca Rossi, Paolo Matteini, Luca Menabuoni M.D., Ivo Lenzetti, and Roberto Pini "Sutureless closure of scleral wounds in animal models by the use of laser welded biocompatible patches", Proc. SPIE 7885, Ophthalmic Technologies XXI, 78850P (11 February 2011); https://doi.org/10.1117/12.874471

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