Patent ID: 11950836
Assignee: TERUMO KABUSHIKI KAISHA
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 17:
18. A medical device comprising:
an elongated shaft portion;
an expansion body disposed in a distal portion of the shaft portion, the expansion body including a plurality of wires in a circumferential direction, each of the plurality of wires configured to expand and contract in a radial direction;
each of the plurality of wires comprising:
a proximal side expansion portion extending radially in a distal direction from a proximal portion of the expansion body;
a distal side expansion portion extending radially in a proximal direction from a distal portion of the expansion body; and
a recessed portion disposed between the proximal side expansion portion and the distal side expansion portion and recessed radially inward;

the recessed portion of each of the plurality of wires comprising:
a proximal side erected portion connected to a distal end of the proximal side expansion portion;
a bottom portion disposed innermost of the recessed portion and distal of the proximal side erected portion; and
a distal side erected portion disposed distal of the bottom portion and connected to the distal side expansion portion; and

wherein the expansion body is configured to expand to a first expanded state by a self-expanding force such that the bottom portion moves radially outward, and the proximal side erected portion and the distal side erected portion move closer to each other, and the expansion body is configured to expand a second expanded state further expanding than the first expanded state by the bottom portion, the proximal side expansion portion and distal side expansion portion moving radially outward.