Apparatus and method for providing enhanced heat transfer from a body
First Claim
1. A system for adjusting the temperature of a patient, comprising:
- a primary fluid circuit, the circuit including;
a primary fluid circuit pump, a heater cooler, primary fluid circuit lines connecting the primary fluid circuit pump to the heater/cooler such that a continuous flow path for circulating primary fluid from the pump to the heater/cooler and back to the is formed;
access points in the primary fluid circuit, the access points fluidly connecting the primary fluid circuit to a primary fluid circuit side of a heat exchanger, the heat exchanger also having a secondary fluid circuit side;
a heat exchange catheter insertable within a patient, the catheter configured to increase, decrease or maintain the temperature of the patient;
a secondary fluid circuit for flowing secondary fluid through the secondary circuit side of the heat exchanger and the heat exchange catheter, the secondary fluid circuit including a secondary fluid circuit pump for flowing a secondary heat exchange fluid through the secondary fluid circuit to the heat exchange catheter and back through the secondary fluid circuit to the secondary fluid pump;
at least one fluid sensor configured to provide a signal representative of a temperature of the primary or secondary fluid circuit;
a patient sensor configured to provide a signal representative of a temperature of the patient;
a controller configured to receive the signals from the patient sensor and the primary fluid sensor and being responsive to the signals to control the heater/cooler to adjust the temperature of the fluid flowing within the fluid circuits.
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0 Petitions
Accused Products
Abstract
Methods and apparatuses for temperature modification of a patient, or selected regions thereof, including an induced state of hypothermia. The temperature modification is accomplished using an in-dwelling heat exchange catheter within which a fluid heat exchange medium circulates. A heat exchange cassette is attached to the circulatory conduits of the catheter, the heat exchange cassette being sized to engage a cavity within a control unit. The control unit includes a heater/cooler device for providing heated or cooled fluid to a heat exchanger in thermal communication with the fluid heat exchange medium circulating to the heat exchange catheter, a user input device, and a processor connected to receive input from various sensors around the body and the system. A temperature control scheme for ramping the body temperature up or down without overshoot is provided.
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Citations
53 Claims
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1. A system for adjusting the temperature of a patient, comprising:
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a primary fluid circuit, the circuit including;
a primary fluid circuit pump, a heater cooler, primary fluid circuit lines connecting the primary fluid circuit pump to the heater/cooler such that a continuous flow path for circulating primary fluid from the pump to the heater/cooler and back to the is formed;
access points in the primary fluid circuit, the access points fluidly connecting the primary fluid circuit to a primary fluid circuit side of a heat exchanger, the heat exchanger also having a secondary fluid circuit side;
a heat exchange catheter insertable within a patient, the catheter configured to increase, decrease or maintain the temperature of the patient;
a secondary fluid circuit for flowing secondary fluid through the secondary circuit side of the heat exchanger and the heat exchange catheter, the secondary fluid circuit including a secondary fluid circuit pump for flowing a secondary heat exchange fluid through the secondary fluid circuit to the heat exchange catheter and back through the secondary fluid circuit to the secondary fluid pump;
at least one fluid sensor configured to provide a signal representative of a temperature of the primary or secondary fluid circuit;
a patient sensor configured to provide a signal representative of a temperature of the patient;
a controller configured to receive the signals from the patient sensor and the primary fluid sensor and being responsive to the signals to control the heater/cooler to adjust the temperature of the fluid flowing within the fluid circuits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. A method for adjusting the temperature of a patient, comprising:
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circulating a primary fluid in a primary fluid circuit;
circulating secondary fluid through a heat exchanger in thermal communication with the primary fluid circuit and a secondary heat exchanger in thermal communication with a patient;
maintaining a temperature of the primary fluid at a target temperature under a thermal load in the range of between 400 and 550 watts. - View Dependent Claims (51, 52, 53)
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Specification