Patent ID: 11877939
Assignee: OTSUKA MEDICAL DEVICES CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 1:
2. The stent according to claim 1, having a tensile load of 3 N or less as measured
using a microcatheter Headway 21 manufactured by MicroVention Inc.,
a digital force gauge or push pull gauge,
a pulling device,
a thermostatic chamber, and
a thermometer,
using test conditions including
a speed of 60 mm/min,
a pulling distance equal to the effective length+10 mm, and
a test temperature of 37° C.±2° C., and
using a test method comprising:
confirming with the thermometer that the thermostatic chamber has a temperature of 37° C.±2° C.;
placing the microcatheter in the thermostatic chamber;
inserting a stent retriever into the microcatheter from a proximal side until whole of the stent is housed in the microcatheter;
connecting a proximal end of the stent retriever to the digital force gauge disposed in the pulling device;
fixing the microcatheter with the stent retriever and the microcatheter arranged in a straight line and pulling the stent retriever constantly at the specified speed toward the proximal side using the pulling device; and
recording a maximum tensile load measured with the digital force gauge when the stent retriever is pulled over a distance equal to the effective length+10 mm.