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Comparison of 810 nm and 1064 nm wavelengths for interstitial laser photocoagulation in rabbit brain
Lasers in surgery and medicine, 1997, Vol.21 (1), p.50-58
Wyman, Douglas R.
Schatz, Stanley W.
Maguire, John A. C.
1997
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Wyman, Douglas R.
Schatz, Stanley W.
Maguire, John A. C.
Titel
Comparison of 810 nm and 1064 nm wavelengths for interstitial laser photocoagulation in rabbit brain
Ist Teil von
Lasers in surgery and medicine, 1997, Vol.21 (1), p.50-58
Ort / Verlag
New York: John Wiley & Sons, Inc
Erscheinungsjahr
1997
Quelle
MEDLINE
Beschreibungen/Notizen
Background and Objective This laboratory animal study is a comparison of Nd:YAG 1064 nm and diode 810 nm laser wavelengths in brain interstitial laser photocoagulation (ILP). Specific goals were to identify potential complications and physical characteristics of the thermal damage at both wavelengths prior to undertaking a clinical trial in humans. Study Design/Materials and Methods A total of 41 ILP illuminations were performed in vivo in the brains of 33 anesthetized rabbits using plane‐cut fiber tips implanted directly or through catheters, and diffusing fiber tips. Delivered powers ranged from 1.1 to 4.2 W. Exposures ranged from 300 to 900 s. Survival ranged from 0 to 48 h. Experiments were performed in animals with and without VX‐2 brain tumors. Results Thermal damage from 1.1 W at 810 nm was similar to that from 1.6 W at 1064 nm, but more pronounced. With plane‐cut fiber tips, there was a greater propensity for severe physical effects (smoke, charring, bubbling, surface damage) at 810 nm than at 1064 nm, yet hemorrhage, thrombosis and vapor dissemination were observed at both wavelengths, in both normal brain and tumor. Conclusions For ILP in brain, 1064 nm may be better suited than 810 nm, although both are questionable with plane‐cut‐fiber tips. Compactness and portability may be the only valid reasons for using laser diodes operating around 810 nm. At 1064 nm, the power delivered from plane‐cut fiber tips should be less than 1.5 W, necessitating long exposures, or else an open catheter should be used. Fiber tips with distributed emission may be preferred, provided structural integrity can be maintained. Lasers Surg. Med. 21:50–58, 1997 © 1997 Wiley‐Liss, Inc.
Sprache
Englisch
Identifikatoren
ISSN: 0196-8092
eISSN: 1096-9101
DOI: 10.1002/(SICI)1096-9101(1997)21:1<50::AID-LSM8>3.0.CO;2-X
Titel-ID: cdi_proquest_miscellaneous_79145679
Format
–
Schlagworte
Animals
,
Biological and medical sciences
,
brain
,
Brain - surgery
,
Brain Neoplasms - surgery
,
Diseases of the nervous system
,
interstitial laser photocoagulation (ILP)
,
Laser Coagulation - adverse effects
,
Laser Coagulation - methods
,
laser diode
,
Medical sciences
,
Nd:YAG
,
Neoplasm Transplantation
,
Rabbits
,
Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)
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