Device For Detecting The Gravity Of An Illness

• US 20080064963A1
• Filed: 04/27/2005
• Published: 03/13/2008
• Est. Priority Date: 05/22/2004
• Status: Abandoned Application

• Current Assignee: Loewenstein Medical Technology S.A.
• Original Assignee: Loewenstein Medical Technology S.A.
• Inventors: Grote, Ludger, Scholler, Bernhard, Schwaibold, Matthias
• Application Number:
  US11/596,616
• Publication Number:
  US 20080064963A1
• Time in Patent Office: Days
• US Class Current: 600/481
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/4035 Evaluating the autonomic nervous system
• CPC Class Codes: A61B 5/4818 Sleep apnoea

Abstract

The device is used to detect the gravity of an illness of a living being and the method is used to control the corresponding detection device. At least one sensor (1) for non-invasive measurement of at least one signal dependent upon the autonomous regulation of the cardiovascular system of the living being is connected to an evaluation device (2). The evaluation device (2) is provided with a calculation unit (4) for converting the signal into a state parameter. The evaluation unit also has an index determining device (6) for determining at least one cumulative system parameter. A comparison device (8) that analyses the index while considering other parameters of the living being is connected to an output device (9) for generating the detected gravity of the illness.

Claims

1. A device for determining the severity of an illness, wherein at least one sensor for the noninvasive measurement of at least one signal that is dependent on the autonomic regulation of the cardiovascular system of a person is connected to an evaluation device, where the evaluation device has a calculation unit for converting the signal to a state parameter as well as an index-determining device for determining at least one cumulative system parameter, and where a comparison device that analyzes the index by considering other parameters of the person is connected to an output device for the determined severity of the illness.

2. A device in accordance with claim 1, wherein the sensor (1) is connected with a first memory unit (3) for storing a detected measuring signal.

3. A device in accordance with claim 1, wherein the calculation unit (4) is connected with a second memory unit (5) for storing the determined state parameter.

4. A device in accordance with 3, claim 1, wherein the index-determining device (6) has a variance analyzer for analyzing the variance of the state parameter with respect to time.

5. A device in accordance with claim 1, wherein the index-determining device (6) is provided with a third memory unit (7) for storing the calculated index.

19. A method in accordance with claim 1, wherein an autonomic resting profile of the regulation of the cardiovascular system is determined by the evaluation unit (2).

6. A method for controlling a detection device for evaluating the severity of an illness, wherein at least one signal that is dependent on the autonomic regulation of the cardiovascular system of a person is detected by a noninvasive measurement and analyzed in an evaluation device, where the evaluation unit converts the signal to a state parameter and determines an index, which is assigned to a cumulative system parameter, where the index is compared with other parameters of the person, by means of which the severity of the illness is determined, and where the determined characteristic value for characterizing the severity of the illness is output by the evaluation device.

7. A method in accordance with claim 6, wherein the amplitude variation of the measuring signal is evaluated.

8. A method in accordance with claim 6, wherein a slope of the measuring signal is evaluated.

9. A method in accordance with claim 6, wherein a frequency of the measuring signal is evaluated.

10. A method in accordance with claim 6, wherein an intensity of variation of the measuring signal is evaluated.

11. A method in accordance with claim 6, wherein a pattern recognition is carried out.

12. A method in accordance with claim 6, wherein an EEG signal is evaluated.

13. Amended) A method in accordance with claim 6, wherein an ECG signal is evaluated.

14. A method in accordance with claim 6, wherein the oxygen saturation of the blood is evaluated.

15. A method in accordance with claim 6, wherein the respiratory pattern is evaluated.

16. A method in accordance with claim 6, wherein the optical density of at least one body region is evaluated.

17. A method in accordance with claim 6, wherein a signal evaluation is carried out with respect to existing periodic signal components.

18. A method in accordance with claim 6, wherein an analysis with respect to a maximum signal change is performed.

20. A method in accordance with claim 6, wherein the index is assigned to a cumulative autonomic resting intensity of the regulation of the cardiovascular system.

21. A method in accordance with claim 6, wherein a respiratory activity is taken into consideration in the determination of the autonomic resting profile.

22. A method in accordance with claim 6, wherein a signal analysis is carried out with respect to a period of activation of the autonomic system.

23. A method in accordance with claim 6, wherein in the evaluation of periods of activation of the autonomic system, at least one additional respiratory parameter is evaluated.

24. A method in accordance with claim 6, wherein in the determination of the index, the cumulative number and the intensity of the activation periods of the autonomic system are taken into consideration.

25. A method in accordance with claim 6, wherein the sensor (1) detects the heart rate.

26. A method in accordance with claim 6, wherein the sensor (1) detects the variability of the heart rate.

27. A method in accordance with claim 6, wherein the sensor (1) detects the pulse transit time.

28. A method in accordance with claim 6, wherein the sensor (1) detects the pulse amplitude.

29. A method in accordance with claim 6, wherein a mean value of the measuring signal detected by the sensor (1) is evaluated, which mean value is determined over a predetermined period of time.

30. A method in accordance with claim 6, wherein a maximum value of the measuring signal detected by the sensor (1) is evaluated, which maximum value is the maximum value that occurs over a predetermined interval of time.

31. A method in accordance with claim 6, wherein the signal acquisition is carried out with the use of photoplethysmography.

32. A method in accordance with claim 6, wherein the signal evaluation is carried out within at least one predetermined frequency band.

33. A method in accordance with claim 6, wherein at least one additional physical parameter is evaluated by the evaluation unit (2).

34. A method in accordance with claim 33, wherein the age of the person is evaluated as an additional physical parameter.

35. A method in accordance with claim 33, wherein the sex of the person is evaluated as an additional physical parameter.

36. A method in accordance with claim 33, wherein the weight of the person is evaluated as an additional physical parameter.

37. A method in accordance with claim 33, wherein the case history of the person is evaluated as an additional physical parameter.

38. A method in accordance with claim 33, wherein the medication of the person is evaluated as an additional physical parameter.