Er:YAG delamination of dense biological membranes using flexible hollow waveguides

A. M. Sagi-Dolev; Jacob Dror; Alexandra Inberg; Nathan I. Croitoru

doi:10.1117/12.229179

3 January 1995 Er:YAG delamination of dense biological membranes using flexible hollow waveguides

A. M. Sagi-Dolev, Jacob Dror, Alexandra Inberg, Nathan I. Croitoru

Proceedings Volume 2631, Medical and Fiber Optic Sensors and Delivery Systems; (1995) https://doi.org/10.1117/12.229179
Event: BiOS Europe '95, 1995, Barcelona, Spain

Abstract

Fused silica flexible hollow wave guides developed at TAU were used to deliver Er-YAG laser radiation to a biological membrane model. The model was composed of fibrotic (inner egg shell) membranes that were either brushed with or immersed in physiological saline solution. Waveguides used included fibers with an inner diameter of 0.7 mm and 0.5 mm. Membrane aperture size and fiber output power density were obtained. Results for the 0.5 mm waveguides yielded average apertures of 100 micrometer length at a power density of 5.35 W/cm² and threshold fluence of 10 mJ/cm² for exposed membranes and 35 mJ/cm² for wet membranes. The results indicate that this waveguide can be used to cut dense membranes, finally, we have succeeded in delaminating immersed membranes using a sealed waveguide. These results show the applicability of using fused silica flexible hollow waveguides for Er-YAG surgical applications of dense membranes in aqueous surroundings such as vitrectomy and posterio-copsulectomy in ophthalmology, and possibly for procedures involving pleural membranes.

Citation Download Citation

A. M. Sagi-Dolev, Jacob Dror, Alexandra Inberg, and Nathan I. Croitoru "Er:YAG delamination of dense biological membranes using flexible hollow waveguides", Proc. SPIE 2631, Medical and Fiber Optic Sensors and Delivery Systems, (3 January 1995); https://doi.org/10.1117/12.229179

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