摘要:
An integrated blood pump (110), oxygenator, and heat exchanger is provided having a rotating hollow fiber bundle (115) assembly. A plurality of vanes arranged along a central shaft (124) of the device increase pressure near the center of the fiber bundle (115) to develop sufficient pressure head to pump the blood through the heat exchanger. In alternative embodiments, the heat exchanger comprises a pleated metal wall, a bundle of non-permeable hollow fibers (115), or a coiled tube (130) disposed between the rotating hollow fiber bundle (115), and an interior wall of the housing (113).
摘要:
Apparatus and methods are provided for delivering oxygenated blood at a first flow rate to a first region of the body, and at a second lower flow rate to a second region of the body, using first balloons, second balloons (13, 15), a first lumen (23) that delivers blood to a first plurality of apertures (14) interposed between the first and second balloons.
摘要:
Apparatus and methods for pumping and oxygenating blood are provided that include a gas removal system. An integrated blood processing unit (31) is provided in which a gas removal/blood filter (56), pump (55) and blood oxygenation element (70) are mounted within a common housing (40). The gas removal system includes a sensor (37) mounted on the housing to sense the presence of gas, and a valve (36) is operably coupled to the sensor to evacuate gas from the system when the sensor detects an accumulation of gas.
摘要:
An integrated blood pump/oxygenator (80) having a rotating hollow fiber bundle assembly (81) that both oxygenates, and pumps blood is provided that includes a plurality of partitions (82) (84) (85) disposed within or about the fiber bundle assembly (81) to lengthen the flow path of blood (87) (88) passing through the fiber bundle (81). Alternatively, or in addition, blood flow paths (87) (88) may be lengthened, oxygenation improved by providing internal recirculation paths within the pump/oxygenator, which also advantageously may be used to reduce blood trauma caused by stagnation nearing moving parts, and heat build-up.
摘要:
Improvements to integrated blood pump/oxygenator (120) having a rotating hollow fiber bundle (127) assembly that both oxygenates, and pumps blood, are provided. An inner member arranged along a central axis of the device accelerates blood entering the fiber bundle (127) to reduce micro-bubble generation, and blood trauma. Shearing loads imposed on the fiber elements of the fiber bundle (127) are reduced by the addition of a reinforcement structure, while the gas flow path is configured to reduce flooding, and loss of oxygenation efficiency due to occasional rupture of fiber elements.
摘要:
Apparatus (100) for oxygenating and pumping blood includes a housing defining a blood flow path including, in series, a gas collection plenum (72), a pump space (55) and a blood oxygenation element (70). A pump disposed in the pump space is configured to draw blood from the gas collection plenum and propel blood from the pump space through a heat exchanger (102) and the blood oxygenation element. The heat exchanger includes a heat exchange plate and a coolant space (103).
摘要:
Apparatus (10) for processing blood in an extracorporeal circuit (110) with automatic flow control is provided in which error conditions are sensed and system operation is modulated responsive to the error conditions. The apparatus includes an extracorporeal blood processing system (31), at least one sensor (25-27) to sense the presence of gas or to monitor venous pressure, and a controller (33) operably coupled to the blood processing system to selectively reduce pump speed or reconfigure flow paths the blood processing system responsive to the sensor output.
摘要:
Apparatus and methods for removing gas from a blood handling system. A filter apparatus (40) for monitoring and removing gas is provided comprising of a gas removal/blood filter (46), a sensor (45) to sense the presence of gas, and a valve (36) operably coupled to the sensor to evacuate gas from the apparatus when the sensor detects an accumulation of gas. When used with a previously known blood handling system, the present filter apparatus facilitates priming and the addition of additional blood handling elements during operation of the blood handling system.
摘要:
Apparatus, and methods are provided for delivering oxygenated blood to a patient undergoing cardiac surgery using a perfusion catheter (65) having a distal end carrying first (71), second (72) sealing members. When the perfusion catheter is inserted through an arteriotomy site, the first, and second sealing members are disposed to engage opposite sides of a vessel (A) to apply pressure against the opposite surfaces of the thickness to seal blood perfused into the vessel from leaking through the arteriotomy site. Apparatus for placing the perfusion catheter, and methods of using the apparatus are also provided.
摘要:
Apparatus and methods are provided for delivering oxygenated blood at a first flow rate to a first region of the body, and at a second lower flow rate to a second region of the body, using first balloons, second balloons (13, 15), a first lumen (23) that delivers blood to a first plurality of apertures (14) interposed between the first and second balloons.