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

Claim 18:
19. A treatment method of enlarging a through-hole of a biological tissue by using a medical device having an expansion body having a plurality of wires in a circumferential direction, each of the plurality of wires configured to expand and contract in a radial direction, the method comprising:
expanding a distal side expansion portion of the expansion body in the radial direction at a one side of the biological tissue and a proximal side expansion portion of the expansion body in the radial direction at an opposite side of the biological tissue opposed to the one side so as to position a recessed portion of each of the plurality of wires of the expansion body in the through-hole of the biological tissue and to receive the biological tissue in the recessed portion;
enlarging a diameter of the through-hole with receiving the biological tissue in the recessed portion by the bottom portion of the recessed portion expanding radially outward into the biological tissue and the distal side expansion portion and the proximal side expansion portion expanding radially outward at both sides of the biological tissue; and
performing a maintenance treatment to the biological tissue received in the recessed portion by using a maintenance treatment element disposed on the recess portion of the expansion body.