Abstract: An oxygenator that inhibits or prevents bubbles in blood from exiting through a blood outlet includes an oxygenator part which performs gas exchange on blood and a heat exchanging part which performs heat exchange on the blood. The oxygenators part has a housing that is generally in a rectangular parallelepiped form, with a hollow fiber membrane bundle positioned in the housing. The hollow fiber membrane bundle is formed by a multiplicity of hollow fiber membranes adapted to perform gas exchange. Blood flows along a blood passage comprised of gaps between the hollow fiber membranes and contacts the surface of the hollow fiber membranes where gas exchange occurs with gas flowing through the lumens of the hollow fiber membranes. In addition, a filter member is arranged on a downstream side of the hollow fiber membrane bundle so that bubbles present in the blood are caught by the filter member.

Abstract: An oxygenator which helps avoid bubbles in the blood from being discharged through the blood outlet port of the oxygenator includes a housing, a hollow fiber membrane bundle in the housing and formed by a multiplicity of hollow fiber membranes serving for gas exchange, gas-inlet and gas-outlet ports communicating with gas passages of the hollow fiber membranes, and a blood-inlet and blood-outlet ports. A filter member is provided on a side closer to the blood outlet port of the hollow fiber membrane bundle and serves to catch bubbles in blood. The blood outlet port projects from the housing and a passage enlargement is provided in a vicinity of the end of the blood outlet port closer to the housing and having an increased passage cross-sectional area. The blood passed the filter member is allowed to reach the blood outlet port by being decelerated in the passage enlargement.

Abstract: An artificial lung includes a housing, a tubular hollow fiber membrane bundle contained in the housing and providing a multiplicity of hollow fiber membranes having a gas exchange function, a gas inflow port and a gas outflow port communicating with each other through hollow portions of the hollow fiber membranes, and a blood inflow port and a blood outflow port through which blood is distributed. The tubular hollow fiber membrane bundle has a cylindrical overall shape, and a filter member having a bubble-trapping function is provided on an outer peripheral portion of the tubular hollow fiber membrane bundle.

Abstract: An oxygenator that inhibits or prevents bubbles in blood from exiting through a blood outlet includes an oxygenator part which performs gas exchange on blood and a heat exchanging part which performs heat exchange on the blood. The oxygenators part has a housing that is generally in a rectangular parallelepiped form, with a hollow fiber membrane bundle positioned in the housing. The hollow fiber membrane bundle is formed by a multiplicity of hollow fiber membranes adapted to perform gas exchange. Blood flows along a blood passage comprised of gaps between the hollow fiber membranes and contacts the surface of the hollow fiber membranes where gas exchange occurs with gas flowing through the lumens of the hollow fiber membranes. In addition, a filter member is arranged on a downstream side of the hollow fiber membrane bundle so that bubbles present in the blood are caught by the filter member.

Abstract: An oxygenator that inhibits or prevents bubbles in blood from exiting through a blood outlet includes an oxygenator part which performs gas exchange on blood and a heat exchanging part which performs heat exchange on the blood. The oxygenators part has a housing that is generally in a rectangular parallelepiped form, with a hollow fiber membrane bundle positioned in the housing. The hollow fiber membrane bundle is formed by a multiplicity of hollow fiber membranes adapted to perform gas exchange. Blood flows along a blood passage comprised of gaps between the hollow fiber membranes and contacts the surface of the hollow fiber membranes where gas exchange occurs with gas flowing through the lumens of the hollow fiber membranes. In addition, a filter member is arranged on a downstream side of the hollow fiber membrane bundle so that bubbles present in the blood are caught by the filter member.

Abstract: An artificial lung includes a housing, a tubular hollow fiber membrane bundle contained in the housing and providing a multiplicity of hollow fiber membranes having a gas exchange function, a gas inflow port and a gas outflow port communicating with each other through hollow portions of the hollow fiber membranes, and a blood inflow port and a blood outflow port through which blood is distributed. The tubular hollow fiber membrane bundle has a cylindrical overall shape, and a filter member having a bubble-trapping function is provided on an outer peripheral portion of the tubular hollow fiber membrane bundle.

Abstract: An extracorporeal circuit, which makes it possible to efficiently collect priming solution by displacing the priming solution with blood after the priming solution is fed to the extracorporeal circuit to prime the extracorporeal circuit, includes a circuit body including first and second tubes, a feed bag that feeds the priming solution, a blood reservoir in which a liquid is temporarily stored, a third tube that branches out from the middle of the first tube, and a collection bag which communicates with the third tube and into which the priming solution is collected through the third tube. After the priming solution is fed from the feed bag to prime at least a housing, when the priming solution in the housing is displaced by blood, the priming solution in the housing is transferred and collected in the collection bag due to a height difference between the liquid level and the collection bag.

Abstract: A bubble trap for removing bubbles from blood flowing through an extracorporeal circuit includes device body possessing blood inlet and outlet ports, and a negative-pressure chamber at the upper part of the device body that is adapted to be connected to a gas evacuator at a gas outlet port so that a negative-pressure state can be kept therein. Two communication passages provide communication between the gas outlet port and the device body. On the first communication passage, a liquid-repellant or water-repellent filter is provided in a manner crossing the passage. On the second communication passage, a valve member is arranged. Within the device body, a buoyant float is provided. A mechanism is provided to remove bubbles from the blood by the cooperation of the float and the valve member.

Abstract: An artificial lung includes a housing, a tubular hollow fiber membrane bundle contained in the housing and providing a multiplicity of hollow fiber membranes having a gas exchange function, a gas inflow port and a gas outflow port communicating with each other through hollow portions of the hollow fiber membranes, and a blood inflow port and a blood outflow port through which blood is distributed. The tubular hollow fiber membrane bundle has a cylindrical overall shape, and a filter member having a bubble-trapping function is provided on an outer peripheral portion of the tubular hollow fiber membrane bundle.

Abstract: An extracorporeal circulator comprising a line for extracting blood from a patient, a pump for supplying blood, an artificial lung section performing gas exchange on blood, a line for supplying blood passed through the artificial lung section to the patient, a unit for removing bubbles mixed into the blood, a controller for controlling the flow rate of blood being supplied such that bubbles are not fed to the patient, and a line for detouring blood delivered from the blood pump to return it to the blood pump.

Abstract: An oxygenator which helps avoid bubbles in the blood from being discharged through the blood outlet port of the oxygenator includes a housing, a hollow fiber membrane bundle in the housing and formed by a multiplicity of hollow fiber membranes serving for gas exchange, gas-inlet and gas-outlet ports communicating with gas passages of the hollow fiber membranes, and a blood-inlet and blood-outlet ports. A filter member is provided on a side closer to the blood outlet port of the hollow fiber membrane bundle and serves to catch bubbles in blood. The blood outlet port projects from the housing and a passage enlargement is provided in a vicinity of the end of the blood outlet port closer to the housing and having an increased passage cross-sectional area. The blood passed the filter member is allowed to reach the blood outlet port by being decelerated in the passage enlargement.

Abstract: An oxygenator which helps avoid bubbles in the blood from being discharged through the blood outlet port of the oxygenator includes a housing, a hollow fiber membrane bundle in the housing and formed by a multiplicity of hollow fiber membranes serving for gas exchange, gas-inlet and gas-outlet ports communicating with gas passages of the hollow fiber membranes, and a blood-inlet and blood-outlet ports. A filter member is provided on a side closer to the blood outlet port of the hollow fiber membrane bundle and serves to catch bubbles in blood. The blood outlet port projects from the housing and a passage enlargement is provided in a vicinity of the end of the blood outlet port closer to the housing and having an increased passage cross-sectional area. The blood passed the filter member is allowed to reach the blood outlet port by being decelerated in the passage enlargement.

Abstract: An oxygenator unit includes a venous reservoir, a centrifugal pump, an oxygenator, a connection part for connecting the reservoir and the pump, a connection part for connecting the pump and the oxygenator, and a unit frame. The unit frame includes a reservoir receiving part, a pump receiving part provided at the position under a blood outlet of the venous reservoir disposed at the reservoir receiving part, and an oxygenator receiving part provided at the position in the vicinity of the blood outlet of the centrifugal pump disposed on the pump receiving part. The reservoir is disposed at the reservoir receiving part, the pump is disposed at the pump receiving part; and the oxygenator is disposed at the oxygenator receiving part, and they are held by the unit frame, resulting in a unit.

Abstract: An artificial lung includes a housing, a tubular hollow fiber membrane bundle contained in the housing and providing a multiplicity of hollow fiber membranes having a gas exchange function, a gas inflow port and a gas outflow port communicating with each other through hollow portions of the hollow fiber membranes, and a blood inflow port and a blood outflow port through which blood is distributed. The tubular hollow fiber membrane bundle has a cylindrical overall shape, and a filter member having a bubble-trapping function is provided on an outer peripheral portion of the tubular hollow fiber membrane bundle.

Abstract: An extracorporeal circuit, which makes it possible to efficiently collect priming solution by displacing the priming solution with blood after the priming solution is fed to the extracorporeal circuit to prime the extracorporeal circuit, includes a circuit body including first and second tubes, a feed bag that feeds the priming solution, a blood reservoir in which a liquid is temporarily stored, a third tube that branches out from the middle of the first tube, and a collection bag which communicates with the third tube and into which the priming solution is collected through the third tube. After the priming solution is fed from the feed bag to prime at least a housing, when the priming solution in the housing is displaced by blood, the priming solution in the housing is transferred and collected in the collection bag due to a height difference between the liquid level and the collection bag.

Abstract: An artificial lung includes a housing, a tubular hollow fiber membrane bundle contained in the housing and providing a multiplicity of hollow fiber membranes having a gas exchange function, a gas inflow port and a gas outflow port communicating with each other through hollow portions of the hollow fiber membranes, and a blood inflow port and a blood outflow port through which blood is distributed. The tubular hollow fiber membrane bundle has a cylindrical overall shape, and a filter member having a bubble-trapping function is provided on an outer peripheral portion of the tubular hollow fiber membrane bundle.

Abstract: An extracorporeal circulator comprising a line for extracting blood from a patient, a pump for supplying blood, an artificial lung section performing gas exchange on blood, a line for supplying blood passed through the artificial lung section to the patient, a unit for removing bubbles mixed into the blood, a controller for controlling the flow rate of blood being supplied such that bubbles are not fed to the patient, and a line for detouring blood delivered from the blood pump to return it to the blood pump.

Abstract: A blood line assembly which is capable of being handled relatively easily includes a first tube, a second tube having a second tube body and two branch tubes branching from the second tube body, and a connector having plugs on which the first and branch tubes are removably fit. In the blood line assembly, by removing the first tube and the branch tubes from the connector, the first tube and the branch tubes can be connected to respective catheters positioned in a patient.

Abstract: A bubble trap for removing bubbles from blood flowing through an extracorporeal circuit includes device body possessing blood inlet and outlet ports, and a negative-pressure chamber at the upper part of the device body that is adapted to be connected to a gas evacuator at a gas outlet port so that a negative-pressure state can be kept therein. Two communication passages provide communication between the gas outlet port and the device body. On the first communication passage, a liquid-repellant or water-repellent filter is provided in a manner crossing the passage. On the second communication passage, a valve member is arranged. Within the device body, a buoyant float is provided. A mechanism is provided to remove bubbles from the blood by the cooperation of the float and the valve member.

Abstract: An oxygenator which helps avoid bubbles in the blood from being discharged through the blood outlet port of the oxygenator includes a housing, a hollow fiber membrane bundle in the housing and formed by a multiplicity of hollow fiber membranes serving for gas exchange, gas-inlet and gas-outlet ports communicating with gas passages of the hollow fiber membranes, and a blood-inlet and blood-outlet ports. A filter member is provided on a side closer to the blood outlet port of the hollow fiber membrane bundle and serves to catch bubbles in blood. The blood outlet port projects from the housing and a passage enlargement is provided in a vicinity of the end of the blood outlet port closer to the housing and having an increased passage cross-sectional area. The blood passed the filter member is allowed to reach the blood outlet port by being decelerated in the passage enlargement.