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Endurance test apparatus for medical instrument and endurance test method UPDATE

外国特許コード F110002718
整理番号 WASEDA-140-US
掲載日 2011年4月11日
出願国 アメリカ合衆国
出願番号 67673508
公報番号 20100291524
公報番号 8491308
出願日 平成20年2月29日(2008.2.29)
公報発行日 平成22年11月18日(2010.11.18)
公報発行日 平成25年7月23日(2013.7.23)
国際出願番号 JP2008053636
国際公開番号 WO2009031329
国際出願日 平成20年2月29日(2008.2.29)
国際公開日 平成21年3月12日(2009.3.12)
優先権データ
  • 特願2007-233460 (2007.9.7) JP
  • 2008WO-JP53636 (2008.2.29) WO
発明の名称 (英語) Endurance test apparatus for medical instrument and endurance test method UPDATE
発明の概要(英語) (US8491308)
It is intended to provide an endurance test apparatus whereby the behaviors of a vessel caused by a biomechanical burden can be simulated using a relatively simple constitution so that the endurance of a medical instrument (for example, a stent or an artificial vessel after anastomosis) can be tested in a similar state to an actual vessel, and an endurance test method therefor.
Namely, an endurance test apparatus (10) comprises a simulated vessel (31) made of an elastic body, first and second holding members (32, 33) respectively supporting the both ends in the axial direction of the simulated vessel (31) and making the both ends relatively rotatable and interval-adjustable, and first and second motors (14, 15) operating these holding members (32, 33).
The simulated vessel (31) is supported by the first and second holding members (32, 33) in a state stretched from its inherent length under a tensile force.
Due to the driving motors (14, 15), the holding members (32, 33) elongate and contract the simulated vessel (31), which is in the stretched state as described above, while twisting it.
特許請求の範囲(英語) [claim1]
1. An endurance test apparatus for a medical instrument comprising a simulated blood vessel formed of a predetermined elastic body, supporting means for supporting opposite end portions of the simulated blood vessel in the direction of extension of the simulated blood vessel, the supporting means operating so that the two end portions are relatively rotatable and able to move closer to and away from each other, and drive means for operating the supporting means, wherein the simulated blood vessel is supported by the supporting means in a state of being elongated from a natural-length state under the action of a tensile force, and
wherein the supporting means is driven by the drive means to cause elongating/shortening deformation in the simulated blood vessel in the elongated state while simultaneously causing torsion deformation in the simulated blood vessel.
[claim2]
2. The endurance test apparatus for a medical instrument according to claim 1, wherein the simulated blood vessel is supported by the supporting means in the elongated state disabling generation of bending deformation at the time of the elongating/shortening deformation.
[claim3]
3. An endurance test method for a medical instrument comprising repeatedly performing an operation to cause torsion deformation in a simulated blood vessel formed of a predetermined elastic body and to simultaneously cause elongating/shortening deformation in the simulated blood vessel while a predetermined tensile force is being applied to the simulated blood vessel.
  • 発明者/出願人(英語)
  • IWASAKI KIYOTAKA
  • UMEZU MITSUO
  • NISHIKOHRI AKIRA
  • TSUBOUCHI SHUNSUKE
  • WASEDA UNIVERSITY
国際特許分類(IPC)
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