System and method for detection of fetal heartbeat

• US 6,454,716 B1
• Filed: 05/23/2000
• Issued: 09/24/2002
• Est. Priority Date: 05/23/2000
• Status: Expired due to Term

• Current Assignee: P.M.G. Medica Ltd.
• Original Assignee: P.M.G. Medica Ltd.
• Inventors: Zumeris, Jona
• Primary Examiner(s): Jaworski, Francis J.
• Application Number:
  US09/577,385
• Time in Patent Office: 854 Days
• Field of Search: 600/437, 600/438, 600/453-456, 600/459
• US Class Current: 600/453
• CPC Class Codes: A61B 8/02 Measuring pulse or heart rate
• CPC Class Codes: A61B 8/0866 involving foetal diagnosis; pre-natal or peri-natal diagnosis of the baby
• CPC Class Codes: A61B 8/4281 characterised by sound-transmitting media or devices for coupling the transducer to the tissue
• CPC Class Codes: A61B 8/4461 Features of the scanning mechanism, e.g. for moving the transducer within the housing of the probe
• CPC Class Codes: A61B 8/4483 characterised by features of the ultrasound transducer
• CPC Class Codes: G01S 15/8938 using transducers mounted for mechanical movement in two dimensions
• CPC Class Codes: G01S 15/8979 Combined Doppler and pulse-echo imaging systems

Abstract

The present invention provides a device and method for monitoring and detecting a fetal heartbeat that can be employed by ordinary people with minimal, if any, training, such as expectant mothers. The device can monitor and detect a fetal heartbeat with minimal positioning along the female body at the pregnant portion (the womb) as the device is configured to transmit and receive energy waves at wide angles. The device is economical and is preferably designed for domestic use, outside of the hospital or clinical setting. Specifically, the invention is based on a unique configuration of piezoelectric elements in cooperative configuration with a series of oscillators that is able to transmit and receive ultrasonic waves simultaneously The configuration allows for an optimal scanning range at an unlimited number of angles.

Claims

1. Apparatus for transmitting and receiving energy waver comprising:

at least one piezoceramic scanner in communication with a first oscillator;

at least one piezoceramic transmitter in communication with a second oscillator and operatively coupled to said piezoceramic scanner; and

at least one piezoceramic receiver operatively coupled to said piezoceramic scanner, wherein said piezoceramic transmitter is configure to transmit waves to an object, said receiver is configured to receive signals from said object, and said piezoceramic scanner is configured to vibrate so as to provide a wide scanning area of said object.

2. The apparatus of claim 1 wherein said first oscillator and said second oscillator are configured for operation based on a sinusoidal wave input.

3. The apparatus of claim 1 wherein said first oscillator and said second oscillator are configured for operation based on a standing wave input.

4. The apparatus of claim 1 wherein said scanner is a piezoceramic plate.

5. The apparatus of claim 1 wherein said scanner is a piezoceramic disc.

6. The apparatus of claim 1 wherein said scanner includes a piezoceramic torsional element.

7. The apparatus of claim 1 wherein said scanner, said transmitter and said receiver are coupled so as to oscillate simultaneously.

8. The apparatus of claim 1 wherein said scanner, said transmitter and said receiver are coupled so as to oscillate simultaneously at a second mode of oscillation.

9. The apparatus of claim 1 wherein said at least one piezoceramic trasmitter and at least one piezoceramic receiver are configured in various shapes to achieve variability in scanning.

10. The apparatus of claim 1 wherein said at least one piezoceramic transmitter and said at least one piezoceramic receiver are configured to transmit and receive waves in a perpendicular direction with respect to said scanner.

11. The apparatus of claim 1 additionally comprising a filter layer operatively coupled to said scanner.

12. The apparatus of claim 11 wherein said filter layer has a thickness of approximately ¼

the wavelength of said energy waves transmitted by said at least one piezoceramic transmitter.

13. The apparatus of claim 1 wherein said at least one piezoceramic transmitter includes multiple piezoceramic transmitter elements.

14. The apparatus of claim 1 wherein said at least one piezoceramic receiver includes multiple piezoceramic receiver elements.

15. A system for detecting a fetal heartbeat comprising:

at least one piezoceramic transmitter;

at least one piezoceramic receiver;

at least one piezoceramic scanner operatively coupled, to said at least one piezoceramic transmitter and said at least one piezoceramic receiver;

a processor in communication with said scanner, said transmitter and said receiver, wherein said processor comprises a first oscillator in communication with said scanner and a second oscillator in communication with said transmitter wherein said first oscillator is configured to vibrate said piezoceramic scanner and said second oscillator is configured to transmit waves to said object; and

an amplifier unit in communication with said piezoceramic receiver, said amplifier unit configured for converting said received waves into an output signal.

16. The system of claim 15 wherein said first oscillator and said second oscillator are configured for operation based on a sinusoidal wave input.

17. The system of claim 15 wherein said first oscillator and said second oscillator are configured for operation based on a standing wave input.

18. The system of claim 15 wherein said at least one scanner includes a piezoceramic disc.

19. The system of claim 15 wherein said at least one scanner includes a piezoceramic plate.

20. The system of claim 15, wherein said at least one scanner includes a piesoceramic torsional element.

21. The system of claim 15 wherein said at least one piezoceramic transmitter and said at least one piezoceramic receiver are configured in various shapes to achieve variability in scanning.

22. The apparatus of claim 15 wherein said scanner, said transmitter and said receiver are coupled so as to oscillate simultaneously.

23. The apparatus of claim 15 wherein said scanner, said transmitter and said receiver are coupled so as to oscillate simultaneously in a second mode of oscillation.

24. The system of claim 15 wherein said output signal is in the form of audio output via speaker.

25. The system of claim 15 wherein said output signal is in the form of digital display via counter.

26. The system of claim 15 wherein said at least one piezoceramic transmitter and said at least one piezoceramic receiver are configured to transmit and receive waves in a perpendicular direction with respect to said scanner.

27. The system of claim 15 additionally comprising a filter layer operatively coupled to said scanner.

28. The system of claim 27 wherein said filter layer has a thickness of approximately ¼

the wavelength of said energy waves transmitted by said at least one piezoceramic transmitter.

29. The system of claim 15 wherein said at least one piezoceramic transmitter includes multiple piezoceramic transmitter elements.

30. The system of claim 15 wherein said at least one piezoceramic receiver includes multiple piezoceramic receiver elements.

31. A method for detecting a fetal heartbeat comprising the steps of:

providing at least one piezoceramic transmitter,

at least one piezoceramic receiver, and

at least one piezoceramic scanner operatively coupled to said at least one piezoceramic transmitter and said at least one piezoceramic receiver;

energizing said scanner by a first oscillator,

simultaneously energizing said piezoceramic transmit by a second oscillator so as to create a scanning range over a predetermined while transmitting mechanical waves; and

receiving signals over said predetermined arc, said signals corresponding to a fetal heartbeat.

32. The method of claim 31 additionally comprising the step of varying the scanning sequence.

33. The method of claim 32 wherein the step of varying he scanning sequence is accomplished by varying a voltage input.

34. The method of claim 32 wherein the step of varying the scanning sequence is accomplished by varying frequency input.

35. The method of claim 32 wherein the step of varying the scanning sequence is accomplished by varying a wave input.

36. The method of claim 31 wherein the step of energizing includes inputting a continuous signal.

37. The method of claim 31 wherein the step of energizing includes inputting a pulsed signal.

38. The method of claim 31 wherein the step of energizing includes inputting several signals for progressive wave scanning.

39. A piezoceramic scanner coupled to a transmitter and a receiver and in communication with a first oscillator wherein said first oscillator is configured to transmit electrical waves to said piezoceramic scanner, and wherein said electrical waves are transformed into mechanical waves within said piezoceramic scanner, said mechanical waves configured to vibrate said piezoceramic scanner.