Apparatus and methods for analyzing body sounds

• US 5,957,866 A
• Filed: 11/15/1996
• Issued: 09/28/1999
• Est. Priority Date: 07/03/1995
• Status: Expired due to Fees

• Current Assignee: University Technology Corporation
• Original Assignee: University Technology Corporation
• Inventors: Weinberger, Howard David, Shapiro, Joseph Isaac
• Primary Examiner(s): Cohen, Lee
• Assistant Examiner(s): YARNELL, BRYAN KEITH
• Application Number:
  US08/746,738
• Time in Patent Office: 1,047 Days
• Field of Search: 600/509, 600/513, 600/514, 600/481, 600/483, 600/484, 600/528, 600/529, 600/586, 128/920, 128/928, 128/493
• US Class Current: 600/586
• CPC Class Codes: A61B 5/352 Detecting R peaks, e.g. for synchronising diagnostic apparatus; Estimating R-R interval
• CPC Class Codes: A61B 5/7203 for noise prevention, reduction or removal
• CPC Class Codes: A61B 5/7257 using Fourier transforms
• CPC Class Codes: A61B 5/726 using Wavelet transforms
• CPC Class Codes: A61B 7/003 Detecting lung or respiration noise
• CPC Class Codes: A61B 7/04 Electric stethoscopes microphones, acoustic transducers therefor H04R

Abstract

Apparatus for assisting an operator to diagnose physical conditions in a patient by collecting and analyzing cyclical body sounds such as heart beat, peripheral vessel sounds, or breath sounds. Several cycles of data are collected and digitized. Each cycle is converted to the frequency domain and phase fixed. Then all of the frequency converted and phase fixed cycles are signal averaged together, and the results displayed to the operator. The cycles may be sorted according to respiratory cycle and averaged in two groups. The cycles may be gated according to the patients ECG. The apparatus may suggest diagnoses or further maneuvers to be performed.

Claims

1. Apparatus for analyzing body sounds utilizing body sound data collected from a patient, said apparatus comprising:

means for storing a plurality of cycles of data representing a body sound;

means for converting each cycle to the frequency domain;

means for phase fixing each frequency converted cycle;

means for signal averaging the phase fixed cycles; and

means for providing the averaged signals to a user.

2. The apparatus of claim 1, further including means for visually displaying the averaged signals.

3. The apparatus of claim 1 wherein the cycles of data represent heart beat sounds, said apparatus further including:

means for gating the cycles according to ECG data collected from the patient.

4. The apparatus of claim 3, further including:

means for sorting said cycles according to respiratory phase;

wherein said means for signal averaging the phase fixed cycles signal includes averaging the phase fixed cycles separately according to respiratory phase.

5. The apparatus of claim 3, further including:

means for providing a signal to the user indicating suggested maneuvers to be performed on said patient.

6. The apparatus of claim 3, further including:

means for comparing the averaged signals to a historical database for said patient.

7. The apparatus of claim 3, further including:

means for selecting a suggested patient diagnosis based upon the averaged signals; and

means for providing a signal to the user indicating the selected patient diagnosis.

8. The apparatus of claim 1 wherein the cycles of data represent peripheral vessel sounds and which also uses ECG data collected from the patient, said apparatus further including:

means for gating the cycles according to the ECG data.

9. The apparatus of claim 8 which also utilizes respiratory phase data collected from the patient, and further including:

means for sorting said cycles according to respiratory phase;

wherein said means for signal averaging signal averages the frequency converted, phase fixed cycles separately according to respiratory phase.

10. The apparatus of claim 8, further including:

means for comparing the averaged signals to a historical database for said patient.

11. The apparatus of claim 8, further including:

means for selecting a suggested patient diagnosis based upon the averaged signals; and

means for providing a signal to the user of said apparatus, said signal for indicating the selected patient diagnosis.

12. The apparatus of claim 1 wherein the cycles of data represent breath sounds and which also utilizes respiration phase data collected from the patient, and further including:

means for gating said breath sounds according to respiratory phase.

13. The apparatus of claim 12, further including:

means for comparing the averaged signals to a historical database for said patient.

14. The apparatus of claim 12, further including:

means for selecting a suggested patient diagnosis based upon the averaged signals; and

means for providing a signal to the user of said apparatus, said signal for indicating the selected patient diagnosis.

15. A method of analyzing body sounds utilizing body sound data collected from a patient, said method comprising:

storing a plurality of cycles of data representing a body sound;

converting each cycle to the frequency domain;

phase fixing each frequency converted cycle;

signal averaging the phase fixed cycles; and

providing the averaged signals to a user.

16. The method of claim 15, further including

sorting said cycles according to respiratory phase.

17. The method of claim 15, further including

selecting a suggested patient diagnosis based upon the averaged signals;

and

providing a signal to the user indicating the selected patient diagnosis.

18. The method of claim 15, said method further including

gating the cycles according to ECG data.

19. The method of claim 18 further including

providing a signal to the user indicating suggested maneuvers to be performed on said patient.

20. Method of claim 15, wherein the cycles represent peripheral vessel sounds and which also utilizes the ECG data from the patient, said method further including the step of:

gating the cycles according to the ECG data.

21. The method of claim 15, wherein the cycles represent breath sounds.

22. Apparatus for analyzing body sounds utilizing body sound data and respiratory phase data collected from a patient, said apparatus comprising:

means for storing a plurality of cycles of data representing a body sound;

means for sorting said cycles according to respiratory phase;

means for converting each cycle to the frequency domain;

means for phase fixing each frequency converted cycle;

means for signal averaging the phase fixed cycles; and

means for providing the averaged signals to a user.

23. The apparatus of claim 22, further including means for visually displaying the averaged signals.

24. The apparatus of claim 22, further including means for providing a signal to the user for indicating suggested maneuvers to be performed on said patient.

25. The apparatus of claim 22, further including means for comparing the averaged signals to a historical database for said patient.

26. The apparatus of claim 22, further including means for selecting a suggested patient diagnosis based upon the averaged signals and means for providing a signal to the user of said apparatus indicating the selected patient diagnosis.

27. The apparatus of claim 22, further including means for gating the cycles according to ECG data.

28. A method of analyzing body sounds utilizing body sound and respiratory phase data collected from a patient, said method comprising:

storing a plurality of cycles of data representing a body sound;

converting each cycle to the frequency domain;

sorting said cycles according to respiratory phase;

phase fixing each frequency converted cycle;

signal averaging the phase fixed cycles; and

providing the averaged signals to a user.

29. The method of claim 28, further including selecting a suggested patient diagnosis based upon the averaged signals and providing a signal to the user that indicates the selected patient diagnosis.

30. The method of claim 28, wherein the cycles represent heart beat and said method further including gating the cycles according to ECG data collected from the patient.

31. The method of claim 30 further including providing a signal to the user indicating suggested maneuvers to be performed on the patient.