Contact laser-assisted neuroendoscopy can be performed safely by using pretreated 'black' fibre tips: experimental data

P W Willems, W P Vandertop, R M Verdaasdonk, C F van Swol, G H Jansen

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

BACKGROUND AND OBJECTIVE: Laser-assisted endoscopic neurosurgery by using conventional fibres requires the use of high-power laser light. Because this is potentially hazardous, we developed a pretreated fibre tip and evaluated tissue effects in vitro and in vivo.

STUDY DESIGN/MATERIALS AND METHODS: By applying a highly absorbing coating to the front of the ball tip, almost all laser light is transformed into thermal energy, instantly producing ablative temperatures at the tip itself. The temperature distribution was examined by using an in vitro thermal imaging technique. The in vivo effect on rabbit cerebral tissue was examined macroscopically and histologically.

RESULTS: By using a conventional fibre tip, ablation was not observed, despite the use of high energy and power (20 W for 10 seconds), whereas histology and thermal imaging demonstrated deleterious effects deeply into the cerebral tissue. By using the coated fibre tip, ablation was observed at low energy and power (1 W for 1 second) with thermal effects restricted to superficial structures.

CONCLUSIONS: We show that laser-assisted neuroendoscopy can only be considered to be safe when pretreated "black" fibre tips are used, as laser light damages deep structures.

Original languageEnglish
Pages (from-to)324-9
Number of pages6
JournalLasers in Surgery and Medicine
Volume28
Issue number4
DOIs
Publication statusPublished - 2001

Cite this

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title = "Contact laser-assisted neuroendoscopy can be performed safely by using pretreated 'black' fibre tips: experimental data",
abstract = "BACKGROUND AND OBJECTIVE: Laser-assisted endoscopic neurosurgery by using conventional fibres requires the use of high-power laser light. Because this is potentially hazardous, we developed a pretreated fibre tip and evaluated tissue effects in vitro and in vivo.STUDY DESIGN/MATERIALS AND METHODS: By applying a highly absorbing coating to the front of the ball tip, almost all laser light is transformed into thermal energy, instantly producing ablative temperatures at the tip itself. The temperature distribution was examined by using an in vitro thermal imaging technique. The in vivo effect on rabbit cerebral tissue was examined macroscopically and histologically.RESULTS: By using a conventional fibre tip, ablation was not observed, despite the use of high energy and power (20 W for 10 seconds), whereas histology and thermal imaging demonstrated deleterious effects deeply into the cerebral tissue. By using the coated fibre tip, ablation was observed at low energy and power (1 W for 1 second) with thermal effects restricted to superficial structures.CONCLUSIONS: We show that laser-assisted neuroendoscopy can only be considered to be safe when pretreated {"}black{"} fibre tips are used, as laser light damages deep structures.",
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author = "Willems, {P W} and Vandertop, {W P} and Verdaasdonk, {R M} and {van Swol}, {C F} and Jansen, {G H}",
year = "2001",
doi = "10.1002/lsm.1057",
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journal = "Lasers in Surgery and Medicine",
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Contact laser-assisted neuroendoscopy can be performed safely by using pretreated 'black' fibre tips : experimental data. / Willems, P W; Vandertop, W P; Verdaasdonk, R M; van Swol, C F; Jansen, G H.

In: Lasers in Surgery and Medicine, Vol. 28, No. 4, 2001, p. 324-9.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Contact laser-assisted neuroendoscopy can be performed safely by using pretreated 'black' fibre tips

T2 - experimental data

AU - Willems, P W

AU - Vandertop, W P

AU - Verdaasdonk, R M

AU - van Swol, C F

AU - Jansen, G H

PY - 2001

Y1 - 2001

N2 - BACKGROUND AND OBJECTIVE: Laser-assisted endoscopic neurosurgery by using conventional fibres requires the use of high-power laser light. Because this is potentially hazardous, we developed a pretreated fibre tip and evaluated tissue effects in vitro and in vivo.STUDY DESIGN/MATERIALS AND METHODS: By applying a highly absorbing coating to the front of the ball tip, almost all laser light is transformed into thermal energy, instantly producing ablative temperatures at the tip itself. The temperature distribution was examined by using an in vitro thermal imaging technique. The in vivo effect on rabbit cerebral tissue was examined macroscopically and histologically.RESULTS: By using a conventional fibre tip, ablation was not observed, despite the use of high energy and power (20 W for 10 seconds), whereas histology and thermal imaging demonstrated deleterious effects deeply into the cerebral tissue. By using the coated fibre tip, ablation was observed at low energy and power (1 W for 1 second) with thermal effects restricted to superficial structures.CONCLUSIONS: We show that laser-assisted neuroendoscopy can only be considered to be safe when pretreated "black" fibre tips are used, as laser light damages deep structures.

AB - BACKGROUND AND OBJECTIVE: Laser-assisted endoscopic neurosurgery by using conventional fibres requires the use of high-power laser light. Because this is potentially hazardous, we developed a pretreated fibre tip and evaluated tissue effects in vitro and in vivo.STUDY DESIGN/MATERIALS AND METHODS: By applying a highly absorbing coating to the front of the ball tip, almost all laser light is transformed into thermal energy, instantly producing ablative temperatures at the tip itself. The temperature distribution was examined by using an in vitro thermal imaging technique. The in vivo effect on rabbit cerebral tissue was examined macroscopically and histologically.RESULTS: By using a conventional fibre tip, ablation was not observed, despite the use of high energy and power (20 W for 10 seconds), whereas histology and thermal imaging demonstrated deleterious effects deeply into the cerebral tissue. By using the coated fibre tip, ablation was observed at low energy and power (1 W for 1 second) with thermal effects restricted to superficial structures.CONCLUSIONS: We show that laser-assisted neuroendoscopy can only be considered to be safe when pretreated "black" fibre tips are used, as laser light damages deep structures.

KW - Animals

KW - Brain/surgery

KW - Catheterization

KW - Endoscopy

KW - Laser Therapy/instrumentation

KW - Neurosurgical Procedures/methods

KW - Rabbits

U2 - 10.1002/lsm.1057

DO - 10.1002/lsm.1057

M3 - Article

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SP - 324

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JO - Lasers in Surgery and Medicine

JF - Lasers in Surgery and Medicine

SN - 0196-8092

IS - 4

ER -