Laser myringotomy with different IR laser systems

B. W. Sedlmaier, A. Blödow, S. Jovanovic, L. Nagli, H. G. Eberle

פרסום מחקרי: פרסום בכתב עתמאמרביקורת עמיתים

תקציר

Lasers suitable for myringotomy are the erbium:YAG laser (2940 nm) and the CO2 laser (10600 nm). The study examines the laser-tissue interaction with tympanic membranes of guinea-pigs, horses and formalin-fixed human tympanic membranes and the effects demonstrated by light-microscopy and scanning-electron-microscopy. The minimum energy densities for a perforation with the erbium:YAG laser in guinea-pig eardrums and formalin-fixed human tympanic membranes are 8 J/cm2 and 16 J/cm2 respectively. There are no thermic side effects. With the CO2 laser thermic side effects only occur with energy transmission via silver halide polycrystalline fiber. The minimum power density for perforation is 400 W/cm2 (pulse duration 50 ms). With the microslad 719 micromanipulator (Sharplan, Israel, Tel Aviv), the minimum power densities for perforation of guinea-pig and horse eardrums and for formalin-fixed human tympanic membranes are 150 W/cm2, 300 W/cm2 and 600 W/cm2 (pulse duration: 50 ms) respectively. The minimum power density to achieve a perforation with the SwiftLase™ 757 scanner (Sharplan, Israel, Tel Aviv), is 250 W/cm2 in guinea-pig eardrums (pulse duration: 100 ms). A prototype of a hand-held CO2 laser otoscope is suitable for performing laser myringotomies in formalin-fixed human tympanic membranes.

שפה מקוריתאנגלית
עמודים (מ-עד)41-45
מספר עמודים5
כתב עתLasermedizin
כרך14
מספר גיליון1-2
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - דצמ׳ 1998
פורסם באופן חיצוניכן

טביעת אצבע

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