Effects of different IR laser systems on the tympanic membrane

Benedikt W. Sedlmaier; Alexander Bloedow; Sergije Jovanovic; Lev Nagli; Hans Georg Eberle

doi:10.1117/12.275033

Effects of different IR laser systems on the tympanic membrane

Benedikt W. Sedlmaier, Alexander Bloedow, Sergije Jovanovic, Lev Nagli, Hans Georg Eberle

Research output: Contribution to journal › Conference article › peer-review

3 Scopus citations

Abstract

Lasers suitable for myringotomy are the erbium:YAG laser (2940 nm) and the carbon-dioxide 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 ear drums and formalin-fixed human tympanic membranes are 8 J/cm² and 16 J/cm² respectively. There are no thermic side effects. With the carbon-dioxide 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/cm ², 300 W/cm² and 600 W/cm² (pulse duration: 50 ms) respectively. The minimum power density to achieve a perforation with the SwiftLase^TM 757 scanner (Sharplan, Israel, Tel Aviv), is 250 W/cm² in guinea-pig eardrums (pulse duration: 100 ms). A prototype of a hand-held carbon-dioxide laser otoscope is suitable for performing laser myringotomies in formalin-fixed human tympanic membranes.

Original language	English
Pages (from-to)	114-118
Number of pages	5
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	2970
DOIs	https://doi.org/10.1117/12.275033
State	Published - 1997
Externally published	Yes
Event	Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII - San Jose, CA, United States Duration: 8 Feb 1997 → 8 Feb 1997

Keywords

Application system
Fiber
Histology
IR laser
Laser-tissue interaction
Tympanic membrane

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10.1117/12.275033

Cite this

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title = "Effects of different IR laser systems on the tympanic membrane",

abstract = "Lasers suitable for myringotomy are the erbium:YAG laser (2940 nm) and the carbon-dioxide 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 ear drums and formalin-fixed human tympanic membranes are 8 J/cm2 and 16 J/cm2 respectively. There are no thermic side effects. With the carbon-dioxide 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/cm 2, 300 W/cm2 and 600 W/cm2 (pulse duration: 50 ms) respectively. The minimum power density to achieve a perforation with the SwiftLaseTM 757 scanner (Sharplan, Israel, Tel Aviv), is 250 W/cm2 in guinea-pig eardrums (pulse duration: 100 ms). A prototype of a hand-held carbon-dioxide laser otoscope is suitable for performing laser myringotomies in formalin-fixed human tympanic membranes.",

keywords = "Application system, Fiber, Histology, IR laser, Laser-tissue interaction, Tympanic membrane",

author = "Sedlmaier, {Benedikt W.} and Alexander Bloedow and Sergije Jovanovic and Lev Nagli and Eberle, {Hans Georg}",

year = "1997",

doi = "10.1117/12.275033",

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note = "Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII ; Conference date: 08-02-1997 Through 08-02-1997",

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T1 - Effects of different IR laser systems on the tympanic membrane

AU - Sedlmaier, Benedikt W.

AU - Bloedow, Alexander

AU - Jovanovic, Sergije

AU - Nagli, Lev

AU - Eberle, Hans Georg

PY - 1997

Y1 - 1997

N2 - Lasers suitable for myringotomy are the erbium:YAG laser (2940 nm) and the carbon-dioxide 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 ear drums and formalin-fixed human tympanic membranes are 8 J/cm2 and 16 J/cm2 respectively. There are no thermic side effects. With the carbon-dioxide 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/cm 2, 300 W/cm2 and 600 W/cm2 (pulse duration: 50 ms) respectively. The minimum power density to achieve a perforation with the SwiftLaseTM 757 scanner (Sharplan, Israel, Tel Aviv), is 250 W/cm2 in guinea-pig eardrums (pulse duration: 100 ms). A prototype of a hand-held carbon-dioxide laser otoscope is suitable for performing laser myringotomies in formalin-fixed human tympanic membranes.

AB - Lasers suitable for myringotomy are the erbium:YAG laser (2940 nm) and the carbon-dioxide 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 ear drums and formalin-fixed human tympanic membranes are 8 J/cm2 and 16 J/cm2 respectively. There are no thermic side effects. With the carbon-dioxide 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/cm 2, 300 W/cm2 and 600 W/cm2 (pulse duration: 50 ms) respectively. The minimum power density to achieve a perforation with the SwiftLaseTM 757 scanner (Sharplan, Israel, Tel Aviv), is 250 W/cm2 in guinea-pig eardrums (pulse duration: 100 ms). A prototype of a hand-held carbon-dioxide laser otoscope is suitable for performing laser myringotomies in formalin-fixed human tympanic membranes.

KW - Application system

KW - Fiber

KW - Histology

KW - IR laser

KW - Laser-tissue interaction

KW - Tympanic membrane

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VL - 2970

SP - 114

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JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

T2 - Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII

Y2 - 8 February 1997 through 8 February 1997

ER -

Effects of different IR laser systems on the tympanic membrane

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Keywords

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