Selective laser vaporization of polypropylene sutures and mesh

David Burks; Sarah B. Rosenbury; Michael J. Kennelly; Nathaniel M. Fried

doi:10.1117/12.905644

9 February 2012 Selective laser vaporization of polypropylene sutures and mesh

David Burks, Sarah B. Rosenbury, Michael J. Kennelly, Nathaniel M. Fried

Proceedings Volume 8207, Photonic Therapeutics and Diagnostics VIII; 820710 (2012) https://doi.org/10.1117/12.905644
Event: SPIE BiOS, 2012, San Francisco, California, United States

Abstract

Complications from polypropylene mesh after surgery for female stress urinary incontinence (SUI) may require tedious surgical revision and removal of mesh materials with risk of damage to healthy adjacent tissue. This study explores selective laser vaporization of polypropylene suture/mesh materials commonly used in SUI. A compact, 7 Watt, 647-nm, red diode laser was operated with a radiant exposure of 81 J/cm², pulse duration of 100 ms, and 1.0-mm-diameter laser spot. The 647-nm wavelength was selected because its absorption by water, hemoglobin, and other major tissue chromophores is low, while polypropylene absorption is high. Laser vaporization of ~200-μm-diameter polypropylene suture/mesh strands, in contact with fresh urinary tissue samples, ex vivo, was performed. Non-contact temperature mapping of the suture/mesh samples with a thermal camera was also conducted. Photoselective vaporization of polypropylene suture and mesh using a single laser pulse was achieved with peak temperatures of 180 and 232 °C, respectively. In control (safety) studies, direct laser irradiation of tissue alone resulted in only a 1 °C temperature increase. Selective laser vaporization of polypropylene suture/mesh materials is feasible without significant thermal damage to tissue. This technique may be useful for SUI procedures requiring surgical revision.

Citation Download Citation

David Burks, Sarah B. Rosenbury, Michael J. Kennelly, and Nathaniel M. Fried "Selective laser vaporization of polypropylene sutures and mesh", Proc. SPIE 8207, Photonic Therapeutics and Diagnostics VIII, 820710 (9 February 2012); https://doi.org/10.1117/12.905644

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