Terumo Kabushiki Kaisha

Takenari Ito

Masaaki Kubo

Takehiko Saito

Shinya Matsumoto

Tetsuya Fukuoka

Haruhiko Takahashi

Yoshiyuki Saito

Yoshitaka Itou

Shota Ishii

Tadahiro Motomura

Aiko Sakimoto

Provided are a treatment method, a separation method, and a filter assembly capable of preventing so-called 'Blue Toe syndrome' which is so-called cholesterol crystal embolism of which a fat-soluble compound such as cholesterol crystals generated during dilation of a stenosed site causes clogging in glomeruli of peripheral capillaries or kidney, acute renal failure, and the like. Cholesterol crystals generated from plaque during use of a balloon catheter are taken out of the body and removed using a centrifugal separation device or a filter, and usable living cells are returned to the body to reduce blood transfusion and reduce cholesterol crystal embolism.

Treatment method, separation method, and filter assembly

A catheter includes an inner layer, an outer layer, a reinforcement layer located between the inner layer and the outer layer, and a marker composed of a contrast material for confirming the position of the distal end portion of the catheter from outside the living body. The reinforcement layer is composed of a spiral first filamentous member, with a gap provided between those portions of the first filamentous member which are adjacent to each other along the longitudinal direction of the catheter. The marker is formed by spirally winding a second filamentous member having a filament diameter smaller than the gap, and has a portion in close contact with the inner layer in the gap.

Position confirming catheter

Growing community of inventors

Fujinomiya, Japan

Takenari Ito