Cooling system for indwelling heat exchange catheter
First Claim
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1. An apparatus for changing and maintaining the temperature of at least a portion of the body of a patient, the apparatus comprising:
- an indwelling catheter adapted for heat exchange within the body;
a means for measuring a core body temperature of the patient;
a primary fluid circuit in fluid flow communication with the indwelling, catheter, the primary circuit adapted to contain a first circulating fluid therein and provided with a detector for sensing fluid loss;
a secondary fluid circuit which is in heat exchange relationship with the primary fluid circuit and adapted to contain a second circulating fluid therein, the first and second fluids being in fluid-flow isolation from each other; and
a temperature control module for changing the temperature of the second fluid, whereby, the temperature control module operates depending on the measured core body temperature of the patient;
wherein the detector for sensing fluid loss comprises;
a fluid volume reservoir in fluid communication with the primary circuit, the fluid volume reservoir assuming a first configuration when the first fluid level is at an acceptable level and assuming a second configuration when the first fluid level is at an unacceptable level;
a switch adapted to toggle between first and second states depending on the configuration of the fluid volume reservoir.
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Abstract
A system for exchanging heat with the body of a patient for cooling or warming the patient provides for automatic temperature control in accordance with the monitored temperature of the patient. The system comprises a temperature control module and temperature probes for making body core temperature measurements. The body core temperature measurements are used to control the temperature of fluid circulating within the fluid circuit.
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Citations
12 Claims
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1. An apparatus for changing and maintaining the temperature of at least a portion of the body of a patient, the apparatus comprising:
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an indwelling catheter adapted for heat exchange within the body;
a means for measuring a core body temperature of the patient;
a primary fluid circuit in fluid flow communication with the indwelling, catheter, the primary circuit adapted to contain a first circulating fluid therein and provided with a detector for sensing fluid loss;
a secondary fluid circuit which is in heat exchange relationship with the primary fluid circuit and adapted to contain a second circulating fluid therein, the first and second fluids being in fluid-flow isolation from each other; and
a temperature control module for changing the temperature of the second fluid, whereby, the temperature control module operates depending on the measured core body temperature of the patient;
wherein the detector for sensing fluid loss comprises;
a fluid volume reservoir in fluid communication with the primary circuit, the fluid volume reservoir assuming a first configuration when the first fluid level is at an acceptable level and assuming a second configuration when the first fluid level is at an unacceptable level;
a switch adapted to toggle between first and second states depending on the configuration of the fluid volume reservoir. - View Dependent Claims (2, 3)
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4. A system for changing the body temperature of a patient, the system comprising:
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an indwelling catheter adapted for heat exchange with the body of the patient;
a means for measuring a core body temperature of the patient;
a primary fluid circuit in fluid communication with the indwelling catheter, the primary fluid circuit adapted to contain a first circulating fluid therein and provided with a detector for sensing fluid loss; and
a temperature control module connected with the means for measuring a core body temperature of a patient for automatically changing the temperature of the first circulating fluid in accordance with the core body temperature of the patient;
wherein the detector for sensing fluid loss comprises;
a fluid volume reservoir in fluid communication with the primary circuit, the fluid volume reservoir assuming a first configuration when the first fluid level is at an acceptable level and assuming a second configuration when the first fluid level is at an unacceptable level;
a switch adapted to toggle between first and second states depending on the configuration of the fluid volume reservoir. - View Dependent Claims (5, 6)
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7. An apparatus for changing or maintaining the temperature of at least a portion of a body of a patient, the apparatus comprising:
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means for exchanging heat with the portion of the body;
a means for measuring a core body temperature of the patient;
a primary fluid circuit in fluid communication with the means for exchanging heat, the primary circuit adapted to contain a first circulating fluid therein and provided with a detector for sensing fluid loss;
a secondary fluid circuit in beat exchange relationship with the primary fluid circuit and adapted to contain a second circulating fluid therein, the first and second fluids being in isolation from each other; and
a means for changing the temperature of the second fluid connected with the means for measuring a core body temperature;
wherein the detector for sensing fluid loss comprises;
a fluid volume reservoir in fluid communication with the primary circuit, the fluid volume reservoir assuming a first configuration when the first fluid level is at an acceptable level and assuming a second configuration when the first fluid level is at an unacceptable level;
a switch adapted to toggle between first and second states depending on the configuration of the fluid volume reservoir. - View Dependent Claims (8, 9)
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10. A system for changing the body temperature of a patient, the system comprising.
a means for exchanging heat with the body of the patient; -
a means for measuring a core body temperature of the patient;
a primary fluid circuit in fluid communication with the means for exchanging heat, the primary circuit adapted to contain a first circulating fluid therein and provided with a detector for sensing fluid loss;
a means for automatically changing the temperature of the first fluid in accordance with the core body temperature of the patient such that a desired body temperature is approached;
wherein the detector for sensing fluid loss comprises;
a fluid volume reservoir in fluid communication with the primary circuit, the fluid volume reservoir assuming a first configuration when the first fluid level is at an acceptable level and assuming a second configuration when the first fluid level is at an unacceptable level;
a switch adapted to toggle between first and second states depending on the configuration of the fluid volume reservoir. - View Dependent Claims (11, 12)
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Specification