System and method for patient temperature control employing temperature projection algorithm
First Claim
1. A method of controlling the administration of a thermal therapy, comprising:
- inserting a catheter having a heat transfer element positioned at a distal tip of the catheter into a blood vessel of a patient, the catheter having a supply lumen for supplying a working fluid to the heat transfer element and a return lumen for returning a working fluid from the heat transfer element;
circulating a working fluid through the catheter and the heat transfer element, the working fluid having a temperature different from the patient temperature;
receiving a signal from a temperature sensor mounted in one of the supply lumen or the return lumen;
determining a control temperature based on the signal; and
using the control temperature to control the temperature of the working fluid, and further comprising causing the working fluid to stop circulating, and wherein the receiving includes;
allowing a first interval of time to pass;
collecting data from the temperature sensor during a second interval of time, such that the allowing and collecting each follow the causing.
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Accused Products
Abstract
Embodiments of the invention provide a system for temperature control of the human body. The system includes an indwelling catheter with a tip-mounted heat transfer element. The catheter is fluidically coupled to a console that provides a heated or cooled heat transfer working fluid to exchange heat with the heat transfer element, thereby heating or cooling blood. The heated or cooled blood then heats or cools the patient'"'"'s body or a selected portion thereof. In particular, methods and devices, including software, are provided for administering cooling or rewarming and controlling the same based on a projected control temperature measured by a temperature sensor within the catheter.
172 Citations
45 Claims
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1. A method of controlling the administration of a thermal therapy, comprising:
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inserting a catheter having a heat transfer element positioned at a distal tip of the catheter into a blood vessel of a patient, the catheter having a supply lumen for supplying a working fluid to the heat transfer element and a return lumen for returning a working fluid from the heat transfer element;
circulating a working fluid through the catheter and the heat transfer element, the working fluid having a temperature different from the patient temperature;
receiving a signal from a temperature sensor mounted in one of the supply lumen or the return lumen;
determining a control temperature based on the signal; and
using the control temperature to control the temperature of the working fluid, and further comprising causing the working fluid to stop circulating, and wherein the receiving includes;
allowing a first interval of time to pass;
collecting data from the temperature sensor during a second interval of time, such that the allowing and collecting each follow the causing. - 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)
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44. A computer program, residing on a computer-readable medium, for causing a machine to:
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receive a signal from a temperature sensor mounted in one of a supply lumen or a return lumen in which a working fluid is flowing;
cause the working fluid to stop flowing;
allow a first interval of time to pass;
collect data from the temperature sensor during a second interval of time;
determine a control temperature based on the collected data; and
use the control temperature to control the temperature of the working fluid.
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45. A computer program, residing on a computer-readable medium, for causing a machine to:
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receive a signal from a temperature sensor mounted in one of a supply lumen or a return lumen or a wall of the supply lumen or return lumen in which a working fluid is flowing;
cause the working fluid to stop flowing;
collect data from the temperature sensor during an interval of time;
determine a control temperature based on the collected data; and
use the control temperature to control the temperature or flow rule of the working fluid.
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Specification