Heat exchange system for patient temperature control with multiple coolant chambers for multiple heat exchange modalities

摘要

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.

主权项

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.