Ultrasonic medical system and associated method

• US 5,871,446 A
• Filed: 04/24/1997
• Issued: 02/16/1999
• Est. Priority Date: 01/10/1992
• Status: Expired due to Term

• Current Assignee: WILK Patent Development Corporation
• Original Assignee: WILK Patent Development Corporation
• Inventors: Wilk, Peter J.
• Primary Examiner(s): Casler, Brian
• Application Number:
  US08/839,971
• Time in Patent Office: 663 Days
• Field of Search: 600/407, 600/437, 600/459, 73/627, 73/638
• US Class Current: 600/407
• CPC Class Codes: A61B 10/0233 Pointed or sharp biopsy instruments
• CPC Class Codes: A61B 5/00 Measuring for diagnostic purposes radiation diagnosis A61B6/00; diagnosis by ultrasonic, sonic or infrasonic waves A61B8/00; Identification of persons
• CPC Class Codes: A61B 5/0022 Monitoring a patient using a global network, e.g. telephone networks, internet
• CPC Class Codes: A61B 5/1075 for measuring dimensions by non-invasive methods, e.g. for determining thickness of tissue layer A61B8/0858 takes precedence
• CPC Class Codes: A61B 5/6843 Monitoring or controlling sensor contact pressure
• CPC Class Codes: A61B 7/04 Electric stethoscopes microphones, acoustic transducers therefor H04R
• CPC Class Codes: A61B 8/00 Diagnosis using ultrasonic, sonic or infrasonic waves imaging of objects using sonar G01S15/00
• CPC Class Codes: A61B 8/08 Detecting organic movements or changes, e.g. tumours, cysts, swellings A61B8/02 - A61B8/06 take precedence
• CPC Class Codes: A61B 8/0833 involving detecting or locating foreign bodies or organic structures
• CPC Class Codes: A61B 8/0866 involving foetal diagnosis; pre-natal or peri-natal diagnosis of the baby
• CPC Class Codes: A61B 8/42 Details of probe positioning or probe attachment to the patient
• CPC Class Codes: A61B 8/4227 characterised by straps, belts, cuffs or braces
• CPC Class Codes: A61B 8/4281 characterised by sound-transmitting media or devices for coupling the transducer to the tissue
• CPC Class Codes: A61B 8/4455 Features of the external shape of the probe, e.g. ergonomic aspects
• CPC Class Codes: A61B 8/4483 characterised by features of the ultrasound transducer
• CPC Class Codes: A61B 8/462 characterised by constructional features of the display
• CPC Class Codes: A61B 8/463 characterised by displaying multiple images or images and diagnostic data on one display composite display in devices for short-range imaging with acoustic waves G01S7/52074
• CPC Class Codes: A61B 8/56 Details of data transmission or power supply
• CPC Class Codes: G01S 15/8925 the array being a two-dimensional transducer configuration, i.e. matrix or orthogonal linear arrays
• CPC Class Codes: G16H 40/67 for remote operation
• CPC Class Codes: G16Z 99/00 : Subject matter not provided for in other main groups of this subclass

Abstract

A medical system incorporates a perforated flexible web conformable to a patient, at least one electroacoustic transducer attached to the web, an a-c current source being operatively connected to the transducer for energizing the transducer with an electrical signal of a pre-established ultrasonic frequency to produce a first pressure wave. At least one acoustoelectric transducer is attached to the web, while an analyzing component is operatively connected to the acoustoelectric transducer for determining three-dimensional shapes of internal organs of the patient by analyzing signals generated by the acoustoelectric transducer in response to second pressure waves produced at internal organs of the patient in response to the first pressure wave. An image of internal organic structures derived through the ultrasonic signal analysis is displayed on a video monitor for enabling direct observation of invasive diagnostic and therapeutic operations. Instruments are inserted into the patient through apertures in the flexible ultrasonic sensor web.

Claims

1. A medical system, comprising:

a carrier disposable in pressure-wave-transmitting contact with a patient;

at least one electroacoustic transducer attached to said carrier;

an a-c current generator operatively connected to said transducer for energizing said transducer with an electrical signal of a pre-established ultrasonic frequency to produce a first pressure wave;

at least one acoustoelectric transducer attached to said carrier; and

analyzing means operatively connected to said acoustoelectric transducer for determining three-dimensional shapes of internal tissues of the patient by analyzing signals generated by said acoustoelectric transducer in response to second pressure waves produced at internal tissues of the patient in response to said first pressure wave.

2. The system defined in claim 1 wherein said carrier carries a plurality of electroacoustic transducers attached to said carrier in a predetermined array, further comprising means for energizing said electroacoustic transducers in a predetermined sequence.

3. The system defined in claim 1 wherein said carrier carries a plurality of acoustoelectric transducers attached to said carrier in a predetermined array, further comprising means for receiving signals from said acoustoelectric transducers in a predetermined sequence.

4. The system defined in claim 1 wherein said carrier is provided with a plurality of apertures each enabling traversal of said carrier by a medical instrument.

5. The system defined in claim 1 wherein said carrier is provided with at least one chamber for holding a fluid, said electroacoustic transducer and said acoustoelectric transducer being in pressure-wave communication with said chamber, thereby facilitating pressure wave transmission from said electroacoustic transducer to the patient and from the patient to said acoustoelectric transducer.

6. The system defined in claim 1 wherein said carrier is a flexible web taking the form of a garment.

7. A system for use in a medical operation, comprising:

a carrier disposable in pressure-wave-transmitting contact with a patient, said carrier having at least one aperture enabling traversal of said carrier by a medical instrument so that a distal end of said medical instrument lies inside the patient while said carrier is disposed adjacent to a skin surface of the patient;

at least one electroacoustic transducer attached to said carrier;

an a-c current source operatively connected to said transducer for energizing said transducer with an electrical signal of a pre-established ultrasonic frequency to produce a first pressure wave;

at least one acoustoelectric transducer attached to said carrier; and

analyzing means operatively connected to said acoustoelectric transducer for determining three-dimensional shapes of internal tissues of the patient and a location of said distal end of said medical instrument by analyzing signals generated by said acoustoelectric transducer in response to second pressure waves produced at internal tissues of the patient and at said distal end of said medical instrument in response to said first pressure wave.

8. The system defined in claim 7, further comprising a video monitor linked to said analyzing means for displaying an image of said internal tissues.

9. The system defined in claim 8, further comprising a view selector operatively connected to said analyzing means and said video monitor for selecting said image from among a multiplicity of possible images of said internal tissues.

10. The system defined in claim 8, further comprising a filter operatively connected to said analyzing means and said video monitor for eliminating selected tissues from said image.

11. The system defined in claim 7 wherein said carrier carries a plurality of electroacoustic transducers attached to said carrier in a predetermined array, further comprising means for energizing said electroacoustic transducers in a predetermined sequence.

12. The system defined in claim 7 wherein said carrier carries a plurality of acoustoelectric transducers attached to said carrier in a predetermined array, further comprising means for receiving signals from said acoustoelectric transducers in a predetermined sequence.

13. A method for performing a medical operation, comprising:

providing a medical instrument and a carrier disposable in pressure-wave-transmitting contact with a patient, said carrier also having at least one electroacoustic transducer and at least one acoustoelectric transducer attached to said carrier;

disposing said carrier adjacent to a skin surface of the patient so that said carrier is in acoustic or pressure-wave-transmitting contact with said skin surface;

after disposition of said carrier adjacent to said skin surface, energizing said electroacoustic transducer with an electrical signal of a pre-established ultrasonic frequency to produce a first pressure wave;

inserting a distal end of said medical instrument into the patient so that said distal end of said medical instrument is disposed inside the patient while said carrier is disposed adjacent to said skin surface; and

automatically analyzing signals generated by said acoustoelectric transducer in response to second pressure waves produced at internal tissues of the patient and at said distal end of said medical instrument in response to said first pressure wave to thereby determine three-dimensional shapes of the internal tissues of the patient and a location of said distal end of said medical instrument relative to said internal tissues, thereby enabling a real time manipulation of said instrument to effectuate a medical operation on a selected one of said internal tissues.

14. The method defined in claim 13 wherein said carrier has at least one aperture, the inserting of said medical instrument including passing said distal end of said medical instrument through said aperture.

15. The method defined in claim 14 wherein said medical instrument is a biopsy instrument.

16. The method defined in claim 15 wherein said medical operation, performable under real-time ultrasonically mediated observation, is taken from the group consisting essentially of breast biopsy, liver biopsy, kidney biopsy, and pleural biopsy.

17. The method defined in claim 14 wherein said medical instrument is taken from the group consisting essentially of drains, tubes, and catheters.

18. The method defined in claim 17 wherein said medical operation, performable under real-time ultrasonically mediated observation, is taken from the group consisting essentially of thoracentesis, abscess drainage, and placement of a tubular member inside said selected one of said internal tissues.

19. The method defined in claim 14 wherein said medical instrument is a laparoscopic instrument.

20. The method defined in claim 13 wherein said carrier carries a plurality of electroacoustic transducers attached to said carrier in a predetermined array, further comprising energizing said electroacoustic transducers in a predetermined sequence.

21. The method defined in claim 13 wherein said carrier carries a plurality of acoustoelectric transducers attached to said carrier in a predetermined array, further comprising receiving signals from said acoustoelectric transducers in a predetermined sequence.

22. The method defined in claim 13, further comprising generating a video image of said internal tissues and said distal end of said medical instrument in response to the analysis of signals generated by said acoustoelectric transducer.

23. The method defined in claim 22, further comprising selecting said image from among a multiplicity of possible images of said internal tissues.

24. The method defined in claim 22, further comprising eliminating selected tissues from said image.

25. The method defined in claim 13, further comprising generating a printed image of said internal tissues in response to the analysis of signals generated by said acoustoelectric transducer.

26. The method defined in claim 13, further comprising generating an additional signal encoding the determined three dimensional shapes of the internal tissues and wirelessly transmitting said additional signal to a remote location.

27. A method For performing a medical operation, comprising;

providing a carrier having an electromechanical transducer;

disposing said carrier on a patient so that said transducer is in pressure-wave-transmitting contact with the patient;

producing a first ultrasonic pressure wave inside the patient;

inserting a distal end of said medical instrument through an opening in said carrier into the patient so that said distal end of said medical instrument is disposed inside the patient;

sensing second pressure waves produced at internal tissues of the patient and at said distal end of said medical instrument in response to said first pressure wave; and

automatically analyzing said second pressure waves to thereby determine three-dimensional shapes of the internal tissues of the patient and a location of said distal end of said medical instrument relative to said internal tissues, thereby enabling a real time manipulation of said instrument to effectuate a medical operation on a selected one of said internal tissues,

at least one of the steps of producing said first ultrasonic pressure wave and sensing said second pressure waves including operating said transducer.

28. The method defined in claim 27 wherein said medical instrument is taken from the group consisting essentially of biopsy instruments, drains, tubes, catheters, and laparoscopic instruments.

29. The method defined in claim 28 wherein said medical operation, performable under real-time ultrasonically mediated observation, is taken from the group consisting essentially of breast biopsy, liver biopsy, kidney biopsy, pleural biopsy, thoracentesis, abscess drainage, placement of a tubular member inside said selected one of said internal tissues, and a laparoscopic operation.

30. The method defined in claim 27, further comprising generating a video image of said internal tissues and said distal end of said medical instrument in response to the analysis of signals generated by said acoustoelectric transducer.