Toyo Boseki Kabushiki Kaisha

Other

Dainippon Ink and Chemicals, Incorporated

Yoshiyuki Taenaka

Hisateru Takano

Susumu Kashiwabara

Takeshi Nakatani

Eisaku Sasaki

Jun Kamo

Hidenori Tanaka

Kazunari Sakai

Takashi Kimura

Toru Takehisa

Eisuke Tatsumi

Takanobu Aoyagi

Tomohiro Nishinaka

Minoru Ikeda

Koichi Hashimoto

Masaki Satoh

Haruhiko Akagi

A membrane artificial lung performs gas exchange between blood and a gas via the membrane by flowing the blood in one side of the membrane and flowing oxygen or an oxygen-containing gas in the other side of the membrane. The membrane has a hollow fiber membrane of poly-4-methylpentene-1 and an oxygen permeation rate Q(O) at 25&#xb0; C. of from 1&#xd7;10to 3&#xd7;10(cm(STP)/cm&#xb7;sec&#xb7;cmHg) and an ethanol flux of from 0.1 to 100 ml/min&#xb7;m. The membrane has, in the side of the blood flow, a surface having an ionic complex derived from: quaternary aliphatic alkylammonium salts; and heparin or a heparin derivative. The quaternary alkylammonium salts are a quaternary aliphatic alkylammonium salt having from 22 to 26 carbon atoms in total and a quaternary aliphatic alkylammonium salt having from 37 to 40 carbon atoms in total.

Artificial lung of membrane type

Apparatus for exchanging substances

There is disclosed a draining cannula to be connected with the left atrium which comprises a tip portion (A), a curvature portion (B) connected with said tip portion and a body tubular portion (C) connected with said curvature portion. The length and the outer diameter of said cannula is sufficient for inserting the cannula into the femoral vein and for reaching the tip portion the left atrium passing through the cava, the right atrium and the interatrial septum. The portion (B) is made of a material which is more flexible than that of said portion (C). A resilient spiral thin wire is provided within the thickenss of the wall part defining the lumen of the curvature portion (B). The cannula is used for draining from the left atrium by inserting it into the femoral vein and passing the tip portion (A) of said cannula through the cava, the right atrium and the interatrial septum to reach the left atrium, without thoracotomy.

Cannula

The present invention discloses an assist circulation apparatus and a method of its driving. Use of the apparatus of the present invention and method of its driving permits weaning from the driving or wearing of the ventricular assist device with simple operation without extreme reduction in the output per beat of the ventricular assist device being attached or severely influencing the patient's body upon recovery of the failed heart.

Auxiliary circulation apparatus and method of its driving

Growing community of inventors

Suita, Japan

Yoshiyuki Taenaka