Heat exchange system for patient temperature control with multiple coolant chambers for multiple heat exchange modalities
First Claim
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1. Heat exchanger, comprising:
- at least first and second plate assemblies defining a first modality working fluid chamber between them, the first modality working fluid chamber being configured for receiving a holder through which sterile working fluid can flow to and from a first modality patient heat exchange member such that the sterile working fluid can exchange heat with the plate assemblies through the holder without the sterile working fluid touching the plate assemblies; and
at least a second modality working fluid chamber through which second working fluid can flow to and from a second modality patient heat exchange member such that the second working fluid from the second modality patient heat exchange member can exchange heat with at least one of the plate assemblies by directly contacting at least one of the plate assemblies, wherein at least the first plate assembly includes at least one refrigerant passageway through which refrigerant can flow to heat or cool the first plate assembly, the refrigerant not being the sterile working fluid or the second working fluid.
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Abstract
Cold plates through which refrigerant flows define a slot between them that can receive a cassette through which sterile working fluid with a relatively low flow rate flows from an intravascular heat exchange catheter. The working fluid from the catheter is heated or cooled by heat exchange with the cold plates through the walls of the cassette to maintain the sterility of the working fluid. On the other hand, high flow rate working fluid chambers surround the cold plates and non-sterile working fluid from an external heat exchange pad flows through the high flow rate working fluid chambers to exchange heat through direct contact with the cold plates.
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Citations
19 Claims
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1. Heat exchanger, comprising:
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at least first and second plate assemblies defining a first modality working fluid chamber between them, the first modality working fluid chamber being configured for receiving a holder through which sterile working fluid can flow to and from a first modality patient heat exchange member such that the sterile working fluid can exchange heat with the plate assemblies through the holder without the sterile working fluid touching the plate assemblies; and at least a second modality working fluid chamber through which second working fluid can flow to and from a second modality patient heat exchange member such that the second working fluid from the second modality patient heat exchange member can exchange heat with at least one of the plate assemblies by directly contacting at least one of the plate assemblies, wherein at least the first plate assembly includes at least one refrigerant passageway through which refrigerant can flow to heat or cool the first plate assembly, the refrigerant not being the sterile working fluid or the second working fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. System comprising:
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at least first and second plate assemblies through which refrigerant can flow through respective first and second refrigerant chambers, the plate assemblies defining a slot between them that can receive first working fluid from a catheter, so that the first working fluid from the catheter can be heated or cooled by the refrigerant flowing through the refrigerant chambers; and the plate assemblies further including respective first and second working fluid chambers laterally outboard the respective first and second refrigerant chambers and configured for receiving second working fluid from a heat exchanger configured for exchanging heat with an external surface of a patient to facilitate heat exchange between the second working fluid and the refrigerant. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. System comprising:
first plate; first working fluid chamber on a first side of the first plate; first refrigerant chamber on a second side of the first plate opposite the first side, such that heat exchange is facilitated through the first plate between the first refrigerant chamber and the first working fluid chamber; and second working fluid chamber separated from the first refrigerant chamber by a wall through which heat exchange may be effected between the second working fluid chamber and the first refrigerant chamber. - View Dependent Claims (19)
Specification