CC BY-NC-ND 4.0 · Asian J Neurosurg
DOI: 10.1055/s-0043-1760850
Original Article

Relationship between Shape Retention and X-ray Absorption Value of the Tip of Microcatheters in Neuroendovascular Treatment

Tomotaka Ohshima
1   Neuroendovascular Therapy Center, Aichi Medical University, Nagakute, Aichi, Japan
,
Fuminori Ato
2   Department of Neurosurgery, Aichi Medical University, Nagakute, Aichi, Japan
,
Reo Kawaguchi
2   Department of Neurosurgery, Aichi Medical University, Nagakute, Aichi, Japan
,
Naoki Matsuo
2   Department of Neurosurgery, Aichi Medical University, Nagakute, Aichi, Japan
,
Shigeru Miyachi
1   Neuroendovascular Therapy Center, Aichi Medical University, Nagakute, Aichi, Japan
2   Department of Neurosurgery, Aichi Medical University, Nagakute, Aichi, Japan
› Author Affiliations
Funding None.

Abstract

Objective We noticed that the X-ray absorption value of the tip of each microcatheter used for aneurysm treatment varied from product to product. We hypothesized that the differences were caused by variations in the metal's density braid, which could be related to the ability of the tip to retain its shape.

Methods The X-ray absorption value of each microcatheter tip was measured. Next, heat forming was performed using a shaping mandrel at 6 mm and 90 degrees to determine whether there was a correlation between the X-ray absorption value and the forming angle. Next, the optimal mandrel angle for forming each microcatheter at 90 degrees was investigated. We also examined the shape retention after 20 times wire insertions into each microcatheter.

Results and Conclusion It was found that the higher the X-ray absorption value, the harder it was for the microcatheter to be formed. The mandrel angle required to form 90 degrees was determined by the X-ray absorption value. The higher the X-ray absorption value, the higher the shape retention of the tip shape. The heat formation and shape-retention conditions of the microcatheter tip were correlated with the X-ray absorption value of the metal braid. Even for unknown microcatheters, the optimum shaping conditions can be inferred from the X-ray absorption value.



Publication History

Article published online:
26 February 2024

© 2024. Asian Congress of Neurological Surgeons. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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