Terumo Kabushiki Kaisha

Shinya Kusunoki

Masahiro Ishida

Yasunobu Zushi

Takanori Tominaga

Manabu Miura

Ryoji Kobayashi

Shinichi Mizuno

Tadasu Tateishi

Masataka Muramatsu

A catheter assembly includes: a catheter; and an inner needle inserted through the catheter. The catheter includes: a catheter body; and a flexible portion that is located at a distal portion of the catheter body and forms a most distal portion of the catheter. An elastic modulus of the catheter body is greater than an elastic modulus of the flexible portion. The catheter has a mixed region in which the catheter body and the flexible portion overlap each other in a radial direction.

Catheter assembly

Provided is an indwelling catheter which is stiff when being inserted into a vessel such as a blood vessel, softens after indwelling in the vessel, and conforms to a shape in a direction in which the vessel runs. In the indwelling catheter, the maximum value of a catheter repulsive force in a dry state at 25&#xb0; C. is 0.10 N or more; the maximum value of the catheter repulsive force when immersed in warm water at 37&#xb0; C. is 0.01 to 0.25 N; a ratio of the maximum value of the catheter repulsive force in a dry state at 25&#xb0; C. to the maximum value of the catheter repulsive force when immersed in warm water at 37&#xb0; C. is in a range of 3.5:1 or more; and the maximum value of the catheter repulsive force when immersed in warm water at 37&#xb0; C. is 0.027 N or less after 5 minutes from indwelling.

Indwelling catheter

A catheter assembly includes: a catheter; a catheter hub; an inner needle; a needle hub; and a deflection suppressing mechanism suppressing deflection of the inner needle. The deflection suppressing mechanism includes an upper deflection suppressing portion positioned on an upper side of the inner needle and a lower deflection suppressing portion positioned on a lower side of the inner needle. At least one of the upper deflection suppressing portion and the lower deflection suppressing portion is movable with respect to the needle hub.

A catheter assembly includes a catheter and an inner needle inserted through the catheter. The catheter has a catheter body and a flexible portion that is provided at a distal portion of the catheter body, includes a most distal portion of the catheter, and is more flexible than the catheter body.

A catheter includes: a first port; a second port; a first lumen communicating with the first port; a second lumen configured to selectively communicate with the first port and/or the second port; and a switching mechanism part selectively switchable between a first switching state in which the first port and the second lumen communicate with each other and a second switching state in which communication between the first port and the second lumen is blocked.

Catheter, switching device, and method for operating catheter

A catheter assembly includes a catheter; a catheter hub fixed to a proximal end portion of the catheter; a hollow needle having a needle tip and disengageably located in the catheter; a needle hub fixed to a proximal end portion of the needle; a guide wire slidably located in the needle, the guide wire being longer than the catheter and having a distal end that is protrudable from the needle tip; a guide wire hub configured to support the guide wire and move the guide wire with respect to the needle in association with movement of the guide wire hub; and a movement mechanism configured to retract the guide wire hub with respect to the needle hub such that the distal end of the guide wire is housed in the needle in association with forward movement of the catheter hub with respect to the needle hub.

Growing community of inventors

Hakui, Japan

Shinya Kusunoki