Acoustic aneurysm detector and associated method

• US 4,928,705 A
• Filed: 12/08/1987
• Issued: 05/29/1990
• Est. Priority Date: 12/08/1987
• Status: Expired due to Fees

• Current Assignee: University of Pittsburgh of The Commonwealth System of Higher Education
• Original Assignee: University of Pittsburgh of The Commonwealth System of Higher Education, The University Of Tennessee Research Corporation (University of Tennessee)
• Inventors: Sekhar, Laligam N., Sun, Mingui, Scalbassi, Robert J., Wasserman, Jacob F.
• Primary Examiner(s): JAWORSKI, FRANCIS J
• Application Number:
  US07/130,108
• Time in Patent Office: 903 Days
• Field of Search: 128/773, 128/644
• US Class Current: 600/586
• CPC Class Codes: A61B 7/001 Detecting cranial noise, e.g. caused by aneurism

Abstract

An acoustic aneurysm detector is disclosed which is comprised of hydrophone sensors in contact with a patient for receiving sound emanating from the patient and converting the sound into responsive or related electrical signals, an electronic unit for converting the responsive electrical signals into processed electrical signals and a computer having software which is operatively associated with the electronic unit for receiving the processed electrical signals and for providing an indication of the frequency of the sound over a specified time range. An associated method is also disclosed.

Claims

1. An acoustic intracranial aneurysm detector consisting of

as plurality of hydrophone sensors adapted to be in contact with a patient for receiving sound emanating from said patient and for converting the sound to be responsive electronic signals, means for adjustably positioning said sensors in contact with the patient'"'"'s head,

electronic means for filtering and amplifying the responsive electric signals to create processed electrical signals, and

analysis means operatively associated with said electronic means for receiving said processed electrical signals and for simultaneously providing an output indication of the frequency and relative magnitude of said sound at each of a plurality of time intervals within a cardiac cycle of said patient, whereby the presence or absence of an aneurysm in said patient can be detected.

2. The detector of claim 1, wherein

said plurality of hydrophone sensors includes a hydrophone sensor for monitoring room noise.

3. The detector of claim 2, wherein said means for positioning is further adapted to position one of said hydrophone sensors on said patient'"'"'s neck.

4. The detector of claim 3, wherein

said hydrophone sensors are at least six in number.

5. The detector of claim 4, wherein

five of said hydrophone sensors are adapted to be positioned for monitoring said sound from said aneurysm and one of said hydrophone sensors is adapted to be positioned for monitoring biological noise.

6. The detector of claim 1, including

wherein said positioning means includes helmet-like means for mounting said hydrophone sensors and for positioning on said patient'"'"'s head.

7. The detector of claim 6, including

said helmet-like means having a central hub and a plurality of fingers which have disposed on their ends said hydrophone sensors.

8. The detector of claim 7, including

said fingers having adjustment means, whereby said hydrophone sensors are adapted to be in contact with said patient'"'"'s head.

9. The detector of claim 8, including

said adjustment means including tongue and groove means which are slidable relative to each other.

10. The detector of claim 9, including

said helmet-like means having five fingers with one said hydrophone sensor associated with each.

11. The detector of claim 1, including

said electronic means having a plurality of signal channel means and power supply means.

12. The detector of claim 11, including

said signal channel means having an EKG channel and a plurality of sensor channel means.

13. The detector of claim 12, including

said sensor channel means being provided for each of said hydrophone sensors.

14. The detector of claim 13, including

said sensor channel means having filter means and amplifier means for converting said responsive electrical signals into said processed electrical signals for input into said analysis means.

15. The detector of claim 1, including

said analysis means comprising analog to digital converter means for digitization of said processed electrical signals and computer means for receiving, analyzing and outputting said indication of the frequency of said digitized and converted sound signals.

16. The detector of claim 15, including

said computer means having multichannel digitization software for analyzing and outputting said digitized and converted sound.

17. The detector of claim 16, including

said digitization software outputting a frequency versus time indication of said sound.

18. The detector of claim 17, including

said software having means capable of presenting output information which presents a visual display which enables a viewer to determine whether a bruit or a spike exists.

19. The detector of claim 18, including

said software having means capable of outputting a Fourier Fast Transform of said sound.

20. The detector of claim 19, including

said software having means capable of outputting a spectrogram analysis of said sound.

21. The detector of claim 18, including

said software having means capable of outputting a spectrogram analysis of said sound.

22. The detector of claim 21, including

said software having means capable of outputting a Fourier Fast Transform of said sound.

23. A method of detecting the presence or absence of an aneurysm in a patient comprising the steps of

providing an acoustic aneurysm detector including a plurality of hydrophone sensors an electronic means, and analysis means,

mounting said hydrophone sensors means on said patient to receive a sound from said patient,

converting said sound by said hydrophone sensors to responsive electrical signals,

amplifying and filtering said responsive electrical signals by said electronic means to create processed electrical signals,

delivering said processed electrical signals to said analysis means, and

outputting a simultaneous indication of the frequency and relative magnitude of said sound at each of a plurality of time intervals within a cardiac cycle of said patient, whereby the presence or absence of said aneurysm in a patient may be detected.

24. The method of claim 23, including

maintaining intimate contact of said hydrophone sensors with said patient.

25. The method of claim 24, wherein said mounting step includes

providing helmet-like means to hold said hydrophone sensors in intimate contact with said patient'"'"'s head.

26. The method of claim 23, including

maintaining said patient in a reclining position.

27. The method of claim 23, including

processing said processed electrical signals by a Fast Fourier Transform and outputting a Digital Fourier Transform of said processed electrical signals.

28. The method of claim 23, including

processing said processed electrical signals by a spectrogram analysis and outputting a spectrogram of said processed electrical signals.

29. A sensor device for use in determining the presence or absence of an aneurysm in a patient comprising a plurality of hydrophone sensors

a helmet-like device adapted to be worn on said patient'"'"'s head including means for receiving said plurality of hydrophone sensors said hydrophone sensors being received within said receiving means such that said sensors are adapted to be in contact with said patient'"'"'s head, and

said helmet-like device having a central hub, and wherein said receiving means includes a plurality of fingers which have disposed on their ends said hydrophone sensors.

30. The detector of claim 29, including

said fingers having adjustment means, whereby intimate contact of said hydrophone, sensors with said patient'"'"'s head is maintained.

31. The detector of claim 30, including

said adjustment means including tongue and groove means.

32. The detector of claim 31, including

said plurality of finger comprises five fingers with a said hydrophone sensors associated with each of said five fingers.