title: Preliminary evaluation of a pulsed 2.15-micron laser system for fiberoptic endoscopic surgery.
abstract: There is a need for lasers that are compatible with fiberoptic endoscopes and that provide greater cutting precision than currently can be produced by the widely used Nd:YAG (1.06 micron) laser. Recently available lasers that operate in the 2-micron region fill this need. This laser light energy can be transmitted by low OH- silica fibers and has much less tissue penetration than radiation at 1.06 micron. We have been evaluating a prototype solid state laser system that produces pulses of 2.15 microns light that is delivered by a silica based fiberoptic delivery system with negligible transmission losses. This system is based on a thulium-holmium-chromium doped YAG (Tm-Ho-Cr: YAG) rod that lases at 2.15 micron. The laser does not require cryogenic cooling, toxic gases, or custom utilities and should be practical in a clinical environment. In vivo animal testing of this laser confirms that it provides greater ablating precision than does the Nd:YAG laser at 1.06 micron.
authors.affiliation: Department of Surgery, Columbia-Presbyterian Medical Center, New York, NY 10032.
authors.forename: M R
authors.initials: MR
authors.lastname: Treat
authors.forename: S L
authors.initials: SL
authors.lastname: Trokel
authors.forename: R D
authors.initials: RD
authors.lastname: Reynolds
authors.forename: V J
authors.initials: VJ
authors.lastname: DeFilippi
authors.forename: J
authors.initials: J
authors.lastname: Andrew
authors.forename: J Y
authors.initials: JY
authors.lastname: Liu
authors.forename: M G
authors.initials: MG
authors.lastname: Cohen
mesh_terms: D000818:Animals; D019723:Endoscopes; D004724:Endoscopy; D004867:Equipment Design; D005069:Evaluation Studies as Topic; D005336:Fiber Optic Technology; D005753:Gastric Mucosa / Q000473:pathology / Q000601:surgery; D006488:Hemostasis, Surgical; D053685:Laser Therapy / Q000295:instrumentation / Q000379:methods*; D011817:Rabbits; D012822:Silicon Dioxide
chemical_list: D012822:Silicon Dioxide