A comparative study of intracranial aneurysm clips: closing and opening forces and physical endurance

Neurosurgery
K OokaY Suzuki

Abstract

The closing and opening forces of various types of intracranial aneurysm clips were measured, and the physical endurance of the clips was evaluated. Straight, bayonet, angled, fenestrated, and temporary Sugita and Yasargil clips were tested by measuring the forces exerted by the blades as they were opened in wider increments and at various points along their length by a specially designed clip tester. Closing forces after repeated openings, continuous opening, or multiple sterilization procedures also were measured. The opening forces of Yasargil clips increased linearly and more sharply as the blades were opened wider than those of Sugita clips. Only Sugita clips showed significant differences between the opening and closing forces (hysteresis). Closing forces of all of the tested clips were according to a hyperbolic curve. Straight clips showed a sharper rise in closing forces than those of bayonet, angled, or fenestrated clips. A relatively weak closing force at the tip of Yasargil long clips and a strong closing force at the base of temporary clips were unexpected findings. The closing force decreased by only 3 to 7% after 500 openings and did not decrease after continuous opening for 17 hours or 100 sterilization procedure...Continue Reading

References

Nov 1, 1979·Journal of Neurosurgery·M DujovnyD Nelson
Oct 1, 1979·Neurosurgery·M DujovnyA Perlin
Apr 1, 1978·Journal of Neurosurgery·W B DeLong, R L Ray
Jun 1, 1978·Journal of Neurosurgery·T J Rosenbaum, T M Sundt
Nov 1, 1977·Journal of Neurosurgery·W B DeLong
Jun 1, 1976·Journal of Neurosurgery·K SugitaT Mizutani
Jan 1, 1984·Journal of Neurosurgery·K SugitaT Takemae

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Citations

Dec 22, 2009·Neurological Research·Dong-Fu FengYang Wang
Jun 16, 2012·Neurosurgical Review·Tetsuyoshi HoriuchiKazuhiro Hongo
Jun 29, 2010·Journal of Neurosurgery·Katrin Van LoockTomas Menovsky

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