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US 5,270,005 AGranted
Extracorporeal blood oxygenation system incorporating integrated reservoir-membrane oxygenerator-heat exchanger and pump assembly
AssigneeBaxter International Inc.
InventorDonald A. Raible
Life of this patent
Estimating the term…
Abstract
An extracorporeal blood oxygenation system comprising an integral blood processing unit having a blood reservoir/oxygenator/heat exchanger/pump and pump motor and a remote control console connectable to the integral blood processing unit by way of non-blood containing connections such as electrical cable or the like.
Claims37
A blood processing unit for extracorporeal blood oxygenation, said blood processing unit being connectable by non-blood transporting connection to a remote control console, the blood processing unit comprising:
- an integral structure comprising (a) a blood reservoir, (b) a membrane oxygenator/heat exchanger formed integrally below the blood reservoir and comprising an outer shell, a first internal blood flow path centrally disposed therewithin, an annular heat exchange space provided adjacent the outer shell, a plurality of hollow fiber membranes provided between the first internal blood flow path and the annular heat exchange space and in fluid communication with the annular heat exchange space, and a blood outlet disposed in fluid communication with the plurality of hollow fiber membranes, (c) a pump attached below the membrane oxygenator/heat exchanger and fluidly connected to the blood reservoir to receive blood from the blood reservoir through the first internal blood flow path and to pump blood to the annular heat exchange space;
- and (d) a second internal blood flow path defined by the pump, the annular heat exchange space, the plurality of hollow fiber membranes, and the blood outlet;
- and
- a pump drive motor sized and configured to mountably and detachably receive the pump thereon and to operatively engage and power the pump when the pump is mounted thereon.
1 more element
A blood processing unit for extracorporeal blood oxygenation, said blood processing unit being connectable by non-blood transporting connection to a remote control console, the blood processing unit comprising:
- an integral structure comprising (a) a blood reservoir, (b) a membrane oxygenator/heat exchanger formed integrally below the blood reservoir and comprising an outer shell, a hollow bore provided therethrough, an annular heat exchange space provided adjacent the outer shell, a plurality of hollow fiber membranes provided between the hollow bore and the annular heat exchange space and in fluid communication with the annular heat exchange space, and a blood outlet disposed in fluid communication with the annular heat exchange space, and (c) a pump disposed between the blood reservoir and the membrane oxygenator/heat exchanger so as to pump blood from the blood reservoir to the plurality of hollow fiber membranes, and including a drive shaft having first and second ends extending through the hollow bore and the first end operatively engaged with the pump;
- an internal blood flow path defined by the blood reservoir, the pump, the plurality of hollow fiber membranes, the annular heat exchange space, and the blood outlet;
- and
- a pump drive motor operatively engaged with the second end of the drive shaft opposite the first end to rotate the drive shaft and to power the pump.
1 more element
A method for processing blood during extracorporeal blood oxygenation, comprising the steps of:
- (a) providing a combined blood processing unit having a unitary blood structure comprising (i) a blood reservoir, (ii) a membrane oxygenator/heat exchanger formed integrally below the blood reservoir and comprising an outer shell, a central tube for blood to flow therethrough, an annular heat exchange space provided adjacent the outer shell, a plurality of hollow fiber membranes provided between the central tube and the annular heat exchange space and in fluid communication with the annular heat exchange space, and a blood outlet disposed in fluid communication with the plurality of hollow fiber membranes, and (iii) a pump attached below the membrane oxygenator/heat exchanger and fluidly connected to the blood reservoir and the central tube of the membrane oxygenator/heat exchanger;
- (b) delivering venous blood from a patient to the blood reservoir;
- (c) pumping blood from the blood reservoir downwardly through the central tube and a first internal passageway and then upwardly through the annular heat exchange space;
- (d) passing blood from the annular heat exchange space to the plurality of hollow fiber membranes;
- (e) oxygenating the blood at the plurality of hollow fiber membranes;
- and
- (f) returning arterial blood from the plurality of hollow fiber membranes through an outlet to the patient.
4 more elements
A method for processing blood during extracorporeal blood oxygenation, comprising the steps of:
- (a) providing a combined blood processing unit having a unitary blood structure comprising (i) a blood reservoir, (ii) a membrane oxygenator/heat exchanger formed integrally below the blood reservoir and comprising an outer shell, a hollow bore provided therethrough, an annular heat exchange space provided adjacent the outer shell, a plurality of hollow fiber membranes provided between the hollow bore and the annular heat exchange space and in fluid communication with the annular heat exchange space, and a blood outlet disposed in fluid communication with the annular heat exchange space, and (iii) a pump disposed between the blood reservoir and the membrane oxygenator/heat exchanger;
- (b) delivering venous blood from a patient to the blood reservoir;
- (c) pumping blood from the blood reservoir through an internal aperture to the plurality of hollow fiber membranes;
- (d) oxygenating the blood at the plurality of hollow fiber membranes;
- (e) passing the oxygenated blood from the plurality of hollow fiber membranes through an internal passageway to the annular heat exchange space;
- and
- (f) returning arterial blood from the annular heat exchange space through an outlet to the patient.
4 more elements
Dependencies are inferred from the claim text.