Endurance of Aneurysm Clips: Mechanical Endurance of Yaşargil and Spetzler Titanium Aneurysm Clips

Marios C. Papadopoulos; Vinothini Apok; Frederick T. Mitchell; David P. Turner; Adrian Gooding; John Norris; Steven D. Chang; Milton D. Heifetz; Mika Niemelä; Juha A. Hernesniemi; Michael T. Lawton; Charles Y. Liu

doi:10.1227/01.NEU.0000116140.53925.03

Endurance of Aneurysm Clips: Mechanical Endurance of Yaşargil and Spetzler Titanium Aneurysm Clips

Marios C. Papadopoulos, Vinothini Apok, Frederick T. Mitchell, David P. Turner, Adrian Gooding, John Norris, Steven D. Chang, Milton D. Heifetz, Mika Niemelä, Juha A. Hernesniemi, Michael T. Lawton, Charles Y. Liu

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

OBJECTIVE: To determine whether repeated use weakens titanium aneurysm clips, making them unsafe for clinical use. METHODS: Nine Yaşargil (titanium alloy) and five Spetzler (pure titanium) clips were subjected to clinically relevant maneuvers, and the effects on the closing force were assessed. Clips were considered unsafe if 1) the blades crossed, 2) the clips failed to close completely, or 3) the blood pressure could open them. RESULTS: Yaşargil and Spetzler clips significantly (P < 0.01 for both) weakened, by 18.9% and 26.1%, respectively, after 10 minutes of sustained maximal opening. After 100 open-close cycles, Spetzler clips showed no change in closing force, but the closing force of Yaşargil clips decreased significantly (P < 0.01), by a further 12.0%. CONCLUSION: Repeated use weakens Spetzler and Yaşargil clips. All Spetzler and all but one Yaşargil clips were deemed safe for clinical use at the end of the experiments.

Original language	English (US)
Pages (from-to)	966-972
Number of pages	7
Journal	Neurosurgery
Volume	54
Issue number	4
DOIs	https://doi.org/10.1227/01.NEU.0000116140.53925.03
State	Published - Apr 2004

Keywords

Aneurysm clip
Closing force
Opening force
Spring fatigue
Titanium
Vascular neurosurgery

ASJC Scopus subject areas

Surgery
Clinical Neurology

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10.1227/01.NEU.0000116140.53925.03

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@article{20dbb116ae024bc1a87f8117c50ae5d4,

title = "Endurance of Aneurysm Clips: Mechanical Endurance of Ya{\c s}argil and Spetzler Titanium Aneurysm Clips",

abstract = "OBJECTIVE: To determine whether repeated use weakens titanium aneurysm clips, making them unsafe for clinical use. METHODS: Nine Ya{\c s}argil (titanium alloy) and five Spetzler (pure titanium) clips were subjected to clinically relevant maneuvers, and the effects on the closing force were assessed. Clips were considered unsafe if 1) the blades crossed, 2) the clips failed to close completely, or 3) the blood pressure could open them. RESULTS: Ya{\c s}argil and Spetzler clips significantly (P < 0.01 for both) weakened, by 18.9% and 26.1%, respectively, after 10 minutes of sustained maximal opening. After 100 open-close cycles, Spetzler clips showed no change in closing force, but the closing force of Ya{\c s}argil clips decreased significantly (P < 0.01), by a further 12.0%. CONCLUSION: Repeated use weakens Spetzler and Ya{\c s}argil clips. All Spetzler and all but one Ya{\c s}argil clips were deemed safe for clinical use at the end of the experiments.",

keywords = "Aneurysm clip, Closing force, Opening force, Spring fatigue, Titanium, Vascular neurosurgery",

author = "Papadopoulos, {Marios C.} and Vinothini Apok and Mitchell, {Frederick T.} and Turner, {David P.} and Adrian Gooding and John Norris and Chang, {Steven D.} and Heifetz, {Milton D.} and Mika Niemel{\"a} and Hernesniemi, {Juha A.} and Lawton, {Michael T.} and Liu, {Charles Y.}",

year = "2004",

month = apr,

doi = "10.1227/01.NEU.0000116140.53925.03",

language = "English (US)",

volume = "54",

pages = "966--972",

journal = "Neurosurgery",

issn = "0148-396X",

publisher = "Lippincott Williams and Wilkins",

number = "4",

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T1 - Endurance of Aneurysm Clips

T2 - Mechanical Endurance of Yaşargil and Spetzler Titanium Aneurysm Clips

AU - Papadopoulos, Marios C.

AU - Apok, Vinothini

AU - Mitchell, Frederick T.

AU - Turner, David P.

AU - Gooding, Adrian

AU - Norris, John

AU - Chang, Steven D.

AU - Heifetz, Milton D.

AU - Niemelä, Mika

AU - Hernesniemi, Juha A.

AU - Lawton, Michael T.

AU - Liu, Charles Y.

PY - 2004/4

Y1 - 2004/4

N2 - OBJECTIVE: To determine whether repeated use weakens titanium aneurysm clips, making them unsafe for clinical use. METHODS: Nine Yaşargil (titanium alloy) and five Spetzler (pure titanium) clips were subjected to clinically relevant maneuvers, and the effects on the closing force were assessed. Clips were considered unsafe if 1) the blades crossed, 2) the clips failed to close completely, or 3) the blood pressure could open them. RESULTS: Yaşargil and Spetzler clips significantly (P < 0.01 for both) weakened, by 18.9% and 26.1%, respectively, after 10 minutes of sustained maximal opening. After 100 open-close cycles, Spetzler clips showed no change in closing force, but the closing force of Yaşargil clips decreased significantly (P < 0.01), by a further 12.0%. CONCLUSION: Repeated use weakens Spetzler and Yaşargil clips. All Spetzler and all but one Yaşargil clips were deemed safe for clinical use at the end of the experiments.

AB - OBJECTIVE: To determine whether repeated use weakens titanium aneurysm clips, making them unsafe for clinical use. METHODS: Nine Yaşargil (titanium alloy) and five Spetzler (pure titanium) clips were subjected to clinically relevant maneuvers, and the effects on the closing force were assessed. Clips were considered unsafe if 1) the blades crossed, 2) the clips failed to close completely, or 3) the blood pressure could open them. RESULTS: Yaşargil and Spetzler clips significantly (P < 0.01 for both) weakened, by 18.9% and 26.1%, respectively, after 10 minutes of sustained maximal opening. After 100 open-close cycles, Spetzler clips showed no change in closing force, but the closing force of Yaşargil clips decreased significantly (P < 0.01), by a further 12.0%. CONCLUSION: Repeated use weakens Spetzler and Yaşargil clips. All Spetzler and all but one Yaşargil clips were deemed safe for clinical use at the end of the experiments.

KW - Aneurysm clip

KW - Closing force

KW - Opening force

KW - Spring fatigue

KW - Titanium

KW - Vascular neurosurgery

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Endurance of Aneurysm Clips: Mechanical Endurance of Yaşargil and Spetzler Titanium Aneurysm Clips

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