Disposable in-the-ear monitoring instrument using a flexible earmold and casing, and method of manufacture

• US 6,253,871 B1
• Filed: 03/08/1999
• Issued: 07/03/2001
• Est. Priority Date: 03/12/1997
• Status: Expired due to Term

• Current Assignee: SRI International, Inc.
• Original Assignee: Sarnoff Corporation (SRI International, Inc.)
• Inventors: Aceti, John Gregory
• Primary Examiner(s): Ip, Paul
• Assistant Examiner(s): San Martin, Edgardo
• Application Number:
  US09/264,656
• Time in Patent Office: 848 Days
• Field of Search: 181/135, 181/134, 181/130, 181/129, 381/328, 381/322, 128/865, 128/867, 128/864
• US Class Current: 181/135
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/6817 Ear canal
• CPC Class Codes: H04R 2225/023 Completely in the canal [CIC] hearing aids
• CPC Class Codes: H04R 25/453 electronically
• CPC Class Codes: H04R 25/456 mechanically
• CPC Class Codes: H04R 25/604 of acoustic or vibrational transducers
• CPC Class Codes: H04R 25/609 of circuitry of electronic switches or control elements H04R25/603
• CPC Class Codes: H04R 25/652 Ear tips; Ear moulds hybrid ear moulds or post-processing thereof for their customisation H04R25/659
• CPC Class Codes: H04R 25/656 Non-customized, universal ear tips, i.e. ear tips which are not specifically adapted to the size or shape of the ear or ear canal
• CPC Class Codes: H04R 25/658 Manufacture of housing parts

Abstract

A disposable in-the-ear monitoring instrument includes a monitoring assembly for monitoring one or more vital health signs of a user, a transmitter assembly for transmitting the monitored vital health signs to a remote receiving unit, and a battery which is sealed within the monitoring instrument for energizing the assemblies. The assemblies and battery are mounted on a flexible printed circuit which is disposed in a flexible, cylindrical casing. And the casing itself is mounted in an earmold made of soft and compliant material, with conical fins extending from an outer surface of the earmold so that the earmold and monitoring circuitry may be easily deformed to comfortably fit a user. The disposable in-the-ear monitoring instrument is of a design having minimal components, and thus is easy to assemble on an automated basis. The automated assembly of the in-the-ear monitoring instrument and its minimal design reduces cost and allows for the disposability of the monitoring instrument.

Claims

1. A disposable in-the-ear monitoring instrument, comprising:

one or more transducers for monitoring vital health signs of a user,

a transmitter for receiving signals from said one or more transducers representative of monitored vital health signs and for transmitting said signals to a remote location,

a battery electrically connected to the transmitter,

a flexible casing for housing said one or more transducer, said transmitter and said battery, and

an earmold of a soft, pliable material and having a plurality of fins projecting outwardly, said earmold for housing said casing with said one or more transducers, said transmitter and said battery.

2. The disposable in-the-ear monitoring instrument according to claim 1, wherein the earmold and casing are each tube like in shape, said earmold having an inside diameter which is expandable to receive said casing, and said casing is fully enclosed within said earmold.

3. The disposable in-the-ear monitoring instrument according to claim 1, wherein said one or more transducers, said transmitter and said battery are electrically connected to a flexible circuit board and are housed in said casing.

4. The disposable in-the-ear monitoring instrument according to claim 1, wherein the fins are along the entire length of the earmold.

5. The disposable in-the-ear monitoring instrument according to claim 4, in which the fins are conical.

6. The disposable in-the-ear monitoring instrument according to claim 4, in which said earmold is cylindrical and has a cylindrical passage therethrough, the cylindrical passage defining an inside surface of said earmold.

7. The disposable in-the-ear monitoring instrument according to claim 6, in which said earmold has first and second ends and said cylindrical passage extends from said first end to said second end and the casing includes a cylindrical passage which extends from said first end to said second end, wherein when said casing is inserted into said earmold, said cylindrical passage in the casing forms a passageway through which air and sounds may pass between first and second ends of said earmold casing.

8. The disposable in-the-ear monitoring instrument according to claim 7, wherein the cylindrical passage in the casing has a diameter of approximately 2 millimeters.

9. The disposable in-the-ear monitoring instrument according to claim 7, in which said earmold is made of a thermoplastic elastomer.

10. The disposable in-the-ear monitoring instrument according to claim 1, wherein said one or more transducers include a pulse monitor comprising a microphone and an amplifier, the microphone being positioned in the monitoring instrument to be proximate to the user'"'"'s ear.

11. The disposable in-the-ear monitoring instrument according to claim 1, wherein said one or more transducers include at least one light source and at least one photo-active element, the light source being positioned to illuminate the user'"'"'s ear drum and the at least one photo-active element being positioned to measure changes in color of light reflected from blood vessels in the user'"'"'s ear drum to collect data relevant to blood oxygenation.

12. The disposable in-the-ear monitoring instrument according to claim 1, wherein said one or more transducers include a heat sensitive transducer to measure the user'"'"'s internal body temperature.

13. The disposable in-the-ear monitoring instrument according to claim 1, wherein said one or more transducers include a microphone for auscultating the user'"'"'s pulse.

14. The disposable in-the-ear monitoring instrument according to claim 1, wherein said one or more transducers include a microphone for auscultating the user'"'"'s respiration.

15. The disposable in-the-ear monitoring instrument according to claim 1, wherein said one or more transducers include a microphone for auscultating the user'"'"'s lung sounds to detect abnormal respiratory sounds.

16. The disposable in-the-ear monitoring instrument according to claim 1, wherein said one or more transducers include a microphone for auscultating the user'"'"'s heart to detect fibrillation, arterial gallop, ventricular gallop or other abnormal sounds emitting from the heart.

17. The disposable in-the-ear monitoring instrument according to claim 1, wherein said transmitter is a radio frequency transmitter.

18. The disposable in-the-ear monitoring instrument according to claim 1, wherein said transmitter is an infrared transmitter.

19. The disposable in-the-ear monitoring instrument according to claim 1, wherein said transmitter is a microwave transceiver.

20. The disposable in-the-ear monitoring instrument according to claim 11, wherein said casing includes means to orient and retain the one or more transducers and the transmitter.

21. The disposable in-the-ear monitoring instrument according to claim 1, wherein said battery is electrically connected to said one or more transducers.

22. The disposable in-the-ear monitoring instrument according to claim 1, further comprising a hearing aid.

23. The disposable in-the-ear monitoring instrument according to claim 20, wherein said hearing aid includes a unity gain amplifier.

24. A method of making a disposable in-the-ear monitoring instrument, comprising the steps of:

mounting electrical components, monitoring components and batteries onto an elongated flexible printed circuit strip to form there along the assembly of a plurality of disposable in-the-ear monitoring instruments;

cutting the flexible printed circuit strip apart to form individual assemblies of one or more of the monitoring components, a transmitter and a battery of a disposable in-the-ear monitoring instrument on a printed circuit;

inserting each assembly into a separate flexible casing; and

inserting a flexible casing containing an assembly into an opening in an earmold formed from a soft, durable and complaint material and having an outer surface, said earmold having a plurality of fins extending from said outer surface.

25. The method according to claim 24, wherein after said electrical components, monitoring components and batteries are mounted on said flexible printed circuit strip, said strip is mounted on a reel.

26. The method according to claim 25, wherein said flexible printed circuit strip on said reel is fed, with casings, into an assembler which cuts the strip apart into said individual assemblies and inserts each assembly into a separate casing.

27. The method according to claim 26, wherein the battery is a zinc-air battery and, after said assemblies are inserted into said casings, said casings containing said assemblies are disposed into a package which is hermetically sealed and which contains a gas, whereby the casing and assembly are protected from atmospheric contamination and any electrical activity in the battery is significantly reduced.

28. The method according to claim 27, wherein said earmolds are molded and packaged in an hermetically sealed package.

29. The method according to claim 28, wherein a suitable earmold and casing suitable for monitoring one or more vital health signs are removed from their individual packages and assembled to form a disposable in-the-ear monitoring instrument.

30. The method according to claim 24, wherein said monitoring components are assembled onto said elongated flexible printed circuit strip to form individual monitoring assemblies capable of monitoring, for a particular user, one or a plurality of vital health signs of the user.

31. The method according to claim 30, wherein said earmolds are made in a predetermined number of different sizes, and a casing suitable for the particular monitoring needs of the user is inserted into an earmold of an appropriate size for the user.

32. The method according to claim 24, wherein said casing and earmold are each generally cylindrical in shape, and said earmold has an inside diameter which is expandable to receive said casing, and said casing is fully enclosed within said earmold.