Jms Co., Ltd.

Shigeki Kawarabata

Junya Fujii

Hiroyuki Maeda

Minoru Tanaka

Tomokazu Niitsuma

Noriaki Nakagawa

Shogo Kamito

Takashi Matsushita

Hiroyuki Meada

Yutaka Nakahara

Takasumi Nakamura

Manabu Okabe

The present invention provides a blood purification apparatus and a blood purification circuit, by which a circuit can be shared by different modes for performing respective continuous blood purification methods, a structure of the apparatus performing the continuous blood purification methods can be simplified, and CHF, CHD, CHDF, and ECUM can be performed. The blood purification apparatus and the blood purification circuit according to the present invention includes: a first supply fluid channel () having one end connected to a supply fluid container () containing a supply fluid flowing in the first supply fluid channel (); a first branched part () connected to the other end of the first supply fluid channel (); a first supply fluid pump () connected to the first branched part (); a second supply fluid channel () which has one end connected to the first supply fluid pump () and the other end connected to a dialyzer () that filters and dialyzes blood, and in which the supply fluid from the first supply fluid pump () flows; a second supply fluid pump () connected to the first branched part (); and a third supply fluid channel () in which a supply fluid from the second supply fluid pump () flows, having one end connected to the second supply fluid pump () and the other end connected to a vein side blood channel () in which blood taken from a patient flows.

Blood purification apparatus and blood purification circuit

A blood circuit capable of automatically performing priming for safe treatments. The blood circuit includes: a hemofilter () purifying blood; a blood removal line that has an end connected to an inlet of the hemofilter () and that includes a first blood removal line (), a second blood removal line (), and a third blood removal line (); a blood return line that has an end connected to an outlet of the hemofilter () and that includes the first blood return line () and the second blood return line (); and an anticoagulant (bypass) line () reducing a difference between (a) a pressure of a priming fluid flowing in the blood removal line and (b) a pressure of the priming fluid flowing in the blood return line.

Blood circuit, blood purification control apparatus, and priming method

A heat exchanger includes a plurality of tubesthrough an inner cavity of which a heat-transfer medium liquid flows, a sealing memberthat seals the plurality of tubeswhile exposing both ends thereof, with a blood channel passing outside each of the tubesbeing formed in a central portion in the axial direction of the tubes, and a housingthat accommodates the tubessealed with the sealing member. The heat exchanger further includes a hollow fiber membranethat is formed of a plurality of hydrophobic and gas permeable hollow fibersand that is disposed on at least one of an entrance side and an exit side of the blood channel in the housingso that a liquid flowing through the blood channel passes through the hollow fiber membrane. The housingincludes openingsfor exposing open ends of each of the hollow fibersforming the hollow fiber membraneto the outside, and gaps between an inner side of the openings and the hollow fibersare sealed. Air can be removed while suppressing a reduction in the heat exchange efficiency.

Heat exchanger for medical use and artificial heart-lung machine

An example of the closed-type blood reservoir of the invention is furnished with an outer shell in which a space is formed within its interior, a flexible septum that is interposed between a blood storage chamber shell and a volume adjustment chamber shell and that divides the space into a blood storage chamber for storing blood and a volume adjustment chamber for storing volume adjustment liquid, a blood inlet port, a blood outlet port, and a blood storage chamber air discharge port that are provided in the blood storage chamber shell such that they are in communication with the blood storage chamber, and a volume adjustment liquid port that is provided in the volume adjustment chamber shell such that it is in communication with the volume adjustment chamber, for injecting and ejecting the volume adjustment liquid into and away from the volume adjustment chamber, wherein the blood inlet port and the blood outlet port each are provided tangentially to the inner surface of the blood storage chamber shell such that blood that flows into the blood storage chamber from the blood inlet port can swirl along the inner surface of the blood storage chamber shell, and wherein the closed-type blood reservoir has a first blood flow route, provided in the blood storage chamber, that is formed by an outward concavity of the inner surface of the blood storage chamber shell, and that is in communication with the blood outlet port and at least part of which is formed in the direction of extension of the blood outlet port.

Closed-type blood reservoir and extracorporeal blood circulation apparatus using the same

The extracorporeal blood circulating apparatus of the present invention includes: a closed-type venous reservoir having a blood storage chamber and a volume adjusting chamber that are disposed adjacently by partitioning a closed space formed by a housing; an adjusting liquid tank for storing an adjusting liquid that is connected to the volume adjusting chamber; and a blood pump that is connected to the blood storage chamber. In the housing, an inflow port for allowing blood to inflow and an outflow port for allowing blood to outflow are provided so as to communicate with the blood storage chamber, and an adjusting port for injecting and ejecting the adjusting liquid is provided so as to communicate with the volume adjusting chamber. The blood pump is connected via the outflow port, and the adjusting liquid tank is connected via the adjusting port. The closed space is partitioned by a flexible septum member so as to form the blood storage chamber and the volume adjusting chamber, and the adjusting liquid tank and the adjusting port are connected by a conduit member having a configuration that can adjust a flowing amount. Control of a blood storage amount to be most appropriate and easy adjustment are possible throughout all steps from before starting an extracorporeal blood circulation to terminating it.

Extracorporeal blood circulating apparatus, closed-type venous reservoir and extracorporeal blood circulating method

A blood vessel anastomosing auxiliary tool consisting of a flexible hollow conduit having opening ends at the opposite ends thereof, and comprising, on the outer surface of the conduit, at least two bulky portions, a retrieving means for retrieving the conduit from within a blood vessel, and desirably a guide wire for guiding the conduit when it is inserted into a blood vessel, characterized in that the conduit has flexibility and self-restoring property, and the bulky portions are disposed on the conduit eccentrically, the use of the blood vessel anastomosing auxiliary tool permitting a quick and positive anastomosis between a bypassed blood vessel and a bypassing blood vessel while a blood flow remaining in a portion between the central and peripheral sides of the bypassed blood vessel is secured during a blood vessel bypassing operation, and further ensuring an unobstructed blood vessel anastomosing to allow an easier practicing operation (anastomosing) than those by conventional tools.

Growing community of inventors

Hiroshima, Japan

Shigeki Kawarabata