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Method of making radial design oxygenator with heat exchanger

a heat exchanger and radial design technology, applied in the field of cardiac bypass circuits, can solve the problems of low pressure drop within the apparatus, achieve the effects of reducing the chance of blood clots, reducing the recirculation of blood or stagnant areas, and being convenient to use for patients

Inactive Publication Date: 2010-10-28
MEDTRONIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an apparatus for oxygenating and controlling the temperature of blood in a cardiopulmonary bypass circuit that overcomes the shortcomings of prior art devices. The apparatus includes a core through which blood can be supplied to the apparatus from a patient, a heat exchanger, and an oxygenator. The design allows for optimal distribution of blood over surface area used for gas and heat exchange, while also minimizing recirculation of blood or stagnant areas of blood. The apparatus is safer for patients, easier and cheaper to manufacture, and improves manufacturability over other similar devices. The technical effects of the invention include improved efficiency, reduced pressure drop, and reduced likelihood of blood clots.

Problems solved by technology

The radial flow also results in a low pressure drop within the apparatus.

Method used

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  • Method of making radial design oxygenator with heat exchanger
  • Method of making radial design oxygenator with heat exchanger
  • Method of making radial design oxygenator with heat exchanger

Examples

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Embodiment Construction

[0049]Referring to FIG. 1, an exemplary cardiopulmonary bypass circuit is schematically illustrated, which includes an embodiment of an apparatus 10 in accordance with the invention. The circuit generally draws blood of a patient 5 during cardiovascular surgery through a venous line 11, oxygenates the blood, and returns the oxygenated blood to the patient 5 through an arterial line 15. Venous blood drawn from the patient through line 11 is discharged into a venous reservoir 22. Cardiotomy blood and surgical field debris are aspirated by a suction device 16 and are pumped by pump 18 into a cardiotomy reservoir 20. Once defoamed and filtered, the cardiotomy blood is also discharged into venous reservoir 22. Alternatively, the function of the cardiotomy reservoir 20 may be integrated into the venous reservoir 22. In the venous reservoir 22, air entrapped in the venous blood rises to the surface of the blood and is vented to the atmosphere through a purge line 24.

[0050]A pump 26 draws b...

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Abstract

Described is a method of making an apparatus for oxygenating and controlling the temperature of blood in an extracorporeal circuit, the steps comprising: providing a core through which blood can be supplied to the apparatus from a patient; providing a heat exchanger about the core such that blood from the core can move radially outward through the heat exchanger; providing an oxygenator about the heat exchanger such that blood from the heat exchanger can move radially outward through the oxygenator; and placing the core, heat exchanger and oxygenator in a housing that includes an inlet in communication with the core and an outlet that is located radially outward from the inlet in order to define a flowpath for blood through the apparatus.

Description

FIELD OF THE INVENTION[0001]The invention generally relates to cardiopulmonary bypass circuits, and particularly to a method of making an apparatus that includes a heat exchanger, an oxygenator, a core, and an optional pump that may be arranged around each other. For example, one embodiment of the apparatus includes a core, a heat exchanger arranged about the core, an oxygenator arranged about the heat exchanger, to which blood is delivered into the core, that optionally comprises a pump, and through which blood moves radially outward from the apparatus, with a fluid medium being supplied separately to the heat exchanger and a gas medium being supplied separately to the oxygenator in directions generally transverse to the radial movement of the blood.BACKGROUND OF THE INVENTION[0002]A cardiopulmonary bypass circuit (i.e., a heart-lung bypass machine) mechanically pumps a patient's blood and oxygenates the blood during major surgery. Blood oxygenators are disposable components of hea...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B21D53/02
CPCA61M1/1698B01D61/00B01D63/021B01D63/025Y10T29/4935B01D2313/38A61M1/1625A61M1/1629B01D2313/20B01D2313/221A61M1/3623B01D63/0233B01D2313/2061
Inventor CARPENTER, WALT L.OLSEN, ROBERT W.HOBDAY, MICHAEL J.MCLEVISH, ALFORD L.PLOTT, CHRISTOPHER J.BRISCOE, RODERICK E.CLOUTIER, PATRICK J.THAPA, ANILLI, MING
Owner MEDTRONIC INC
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