Device for predicting a body temperature of a patient

• US 8,808,343 B2
• Filed: 06/19/2009
• Issued: 08/19/2014
• Est. Priority Date: 06/21/2008
• Status: Active Grant

• Current Assignee: Dragerwerk AG & Company KGaA (FPS Vermögensverwaltung GmbH)
• Original Assignee: Drager Medical GmbH (FPS Vermögensverwaltung GmbH)
• Inventors: Koch, Jochim, Haar, Maral, Stahlkopf, Susanne
• Primary Examiner(s): Cohen, Lee S
• Application Number:
  US12/487,829
• Publication Number:
  US 20090319009A1
• Time in Patent Office: 1,887 Days
• Field of Search: 607/96, 600/549
• US Class Current: 607/96
• CPC Class Codes: A61B 5/01 Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue clinical contact thermometers G01K13/20
• CPC Class Codes: G01K 13/20 Clinical contact thermometers for use with humans or animals
• CPC Class Codes: G01K 7/42 Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature
• CPC Class Codes: G09B 23/28 for medicine
• CPC Class Codes: G16H 50/20 for computer-aided diagnosis, e.g. based on medical expert systems
• CPC Class Codes: G16H 50/50 for simulation or modelling of medical disorders
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass

Abstract

A device (5) is provided for predicting or simulating a body temperature of a patient (P) at a point in time that is in the future. The device includes a device for determining parameter values concerning the patient (P) and/or the environment thereof. A computing device is provided for simulating a body temperature of the patient (P). A process and a workstation. Are also provided.

Claims

1. A device for predicting or simulating a body temperature of a patient at a point in time that is in the future, the device comprising:

a parameter value means for determining parameter values concerning one of the patient and the environment thereof; and

a computing means for simulating a body temperature of the patient over a future period, based on established physical relationships between the parameters and heat transferred between the patient and the environment;

a body temperature detecting means for detecting a body temperature of the patient, said computing means using the detected body temperature of the patient for further simulating the body temperature;

a comparing means for comparing the detected body temperature with the simulated body temperature.

2. A device in accordance with claim 1, further comprising an output means for outputting results of one of the determination, simulation and comparison.

3. A device in accordance with claim 1, further comprising:

heating means for heating the patient;

a heating control means for controlling or regulating said heating means based on preset set points.

4. A device in accordance with claim 1, further comprising:

heating means for heating the patient;

a heating control means for controlling or regulating said heating means based on one of preset set points and characteristics.

5. A device in accordance with claim 1, wherein:

said computing means determines an acceptable temperature range of the patient;

said comparing means determines if the simulated body temperature of the patient is within, or outside, the acceptable temperature range;

a heating means for heating the patient; and

a heating control means for controlling or regulating said heating means based on said comparing means to apply thermotherapy to the patient before said future period to have future body temperatures be within the acceptable temperature range.

6. A device in accordance with claim 1, wherein:

said body temperature detecting means measures the actual temperature of the patient during a time period over which the body temperature is simulated and generates actual temperature values occurring during said time period;

said comparing means compares the simulated body temperature for the time period and the actual temperature values measured during the time period, said comparing means generating a thermotherapy signal to compensate for a difference between the future body temperature and the actual temperature value at time points during the time period;

said computing means uses the actual temperature values occurring during said time period for further simulation of the body temperature of the patient.

7. A device in accordance with claim 1, wherein:

at least one of said parameters is a non-temperature parameter;

said computing means generates a desired present temperature value for the patient based on the future body temperature;

said comparing means compares the detected body temperature with the desired present temperature value;

an output means is provided for outputting results of one of the determination, simulation and comparison.

8. A thermotherapy system for a patient, the system comprising:

a parameter value device determining a plurality of parameter values for different parameters concerning one of the patient and the environment thereof, at least one of said parameters being a non-temperature parameter;

a computing device simulating a future body temperature of the patient over a time period extending into the future based on established physical relationships between the parameters and heat transferred between the patient and the environment, said computing device determining an acceptable temperature range of the patient, and comparing the future body temperature of the patient with said acceptable temperature range of the patient, said computing device generating a desired present temperature value for the patient based on the future body temperature;

a temperature measuring means measuring the actual temperature of the patient and generating an actual temperature value;

a regulator generating a thermotherapy signal before the time period extending into the future to have the future body temperature be within the acceptable temperature range;

a thermotherapy device receiving the thermotherapy signal, and applying thermotherapy to the patient with respect to the thermotherapy signal.

9. A thermotherapy system in accordance with claim 8, wherein:

said computing device uses physical and physiological models of the patient which relate the different parameters to the heat transfer of the patient to generate the desired temperature value for the patient.

10. A thermotherapy system in accordance with claim 8, wherein:

said computing device simulates blood flow through the patient to generate the future body temperature and the desired temperature value for the patient.

11. A thermotherapy system in accordance with claim 8, wherein:

said computing device simulates a metabolism of the patient to generate the future body temperature and the desired temperature value for the patient.

12. A thermotherapy system in accordance with claim 8, wherein:

one of the different parameters is a parameter describing the environment in which the patient is located.

13. A thermotherapy system in accordance with claim 8, wherein:

one of the different parameters is a heat radiation parameter.

14. A thermotherapy system in accordance with claim 8, wherein:

one of the different parameters is a convection parameter.

15. A thermotherapy system in accordance with claim 8, wherein:

one of the different parameters is a conduction parameter.

16. A thermotherapy system in accordance with claim 8, wherein:

the different parameters include one of an evaporation parameter, a perspiration parameter, a parameter involved with the evaporation of disinfectant from the skin of the patient, a parameter describing a release of heat via wounds of the patient, a parameter describing the heat transfer of the patient due to infusions, and a parameter separately relating to one of a core or periphery of the patient.

17. A thermotherapy system in accordance with claim 8, wherein:

said temperature measuring means measures the actual temperature of the patient during said time period and generates actual temperature values occurring during said time period;

said regulator receives the future body temperature simulated for the time period and the actual temperature values measured during the time period, said regulator generating a thermotherapy signal to compensate for a difference between the future body temperature and the actual temperature value at time points during the time period;

said computing device uses the actual temperature values occurring during said time period for further simulation of the body temperature of the patient.

18. A thermotherapy process for thermo-regulating a patient, the process comprising the steps of:

determining an acceptable temperature range of the patient;

determining a plurality of parameter values for different parameters concerning one of the patient and the environment thereof, at least one of said parameters being a non-temperature parameter;

simulating a future body temperature of the patient at a future time based on established physical relationships between the parameters and the temperature of the patient;

comparing the future body temperature of the patient with said acceptable temperature range of the patient;

determining if the future body temperature of the patient is within, or outside, the acceptable temperature range;

if the simulated future body temperature is outside of the acceptable temperature range, applying thermotherapy to the patient before said future time to have future body temperatures be within the acceptable temperature range.

19. A thermotherapy process in accordance with claim 18, wherein:

said simulating uses physical and physiological models of the patient which relate the different parameters to a body temperature of the patient.

20. A thermotherapy process in accordance with claim 18, wherein:

said simulating includes one of simulating blood flow through the patient, and simulating the metabolism of the patient.

21. A thermotherapy process in accordance with claim 18, wherein:

at least one of said different parameters is a parameter describing the environment in which the patient is located, a heat radiation parameter, a convection parameter, a conduction parameter, an evaporation parameter, a perspiration parameter, a parameter involved with the evaporation of disinfectant from the skin of the patient, a parameter describing a release of heat via wounds of the patient, a parameter describing the heat transfer of the patient due to infusions, or a heat radiation parameter.