Disposable sensor for measuring respiration

• US 6,461,307 B1
• Filed: 09/13/2000
• Issued: 10/08/2002
• Est. Priority Date: 09/13/2000
• Status: Active Grant

• Current Assignee: Natus Medical Incorporated
• Original Assignee: Flaga Hf
• Inventors: Hermannson, Kormakur, Kristbjarnarson, Helgi, Gudjonsson, Eggert
• Primary Examiner(s): Shaver, Kevin
• Assistant Examiner(s): Natnithithadha, Navin
• Application Number:
  US09/661,156
• Time in Patent Office: 755 Days
• Field of Search: 600/534, 600/535, 600/529, 600/300, 600/587, 600/390, 600/547, 600/595
• US Class Current: 600/534
• CPC Class Codes: A61B 5/1135 by monitoring thoracic expansion
• CPC Class Codes: A61B 5/6831 Straps, bands or harnesses

Abstract

The present invention is directed to a disposable sensor for monitoring and measuring the respiration of a patient. The disposable sensor includes at least one flexible ribbon adapted to encircle a portion (e.g., the chest or abdomen) of the patient. Each flexible ribbon includes a conductor strip secured thereto. The conductor strip extends in a zig-zag or other predetermined pattern. The disposable sensor also includes a connector assembly for connecting and securing a first free end of the ribbon to a second free end of the ribbon. The connector assembly is operatively coupled to the conductor, and is further adapted to be connected to a monitoring device.

Claims

1. A disposable sensor for monitoring changes in volume of an expandable organ of a patient, comprising:

at least one flexible stretchable ribbon adapted to encircle a portion of the patient, wherein each of said at least one flexible stretchable ribbon includes a conductor secured thereto, wherein each of said at least one flexible stretchable ribbon has a first free end and a second free end, wherein the conductor has a first conductor free end adjacent the first free end and a second conductor free end adjacent the second free end; and

a connector assembly for connecting and securing said first free end to said second free end, wherein said connector assembly is operatively coupled to said conductor adjacent the first conductor free end and the second conductor free end, and is adapted to be connected to a monitoring device such that said connector assembly transmits changes in inductance of said conductor to the monitoring device.

2. The disposable sensor according to claim 1, wherein said conductor is secured to said flexible stretchable ribbon in a zig zag pattern.

5. The disposable sensor according to claim 1, wherein each of said at least one flexible stretchable ribbon comprises:

a first flexible ribbon; and

a second flexible ribbon secured to said first flexible ribbon, wherein said conductor is located between said first and second flexible ribbons.

6. The disposable sensor according to claim 5, wherein said conductor is laminated between said first flexible ribbon and said second flexible ribbon.

7. The disposable sensor according to claim 5, wherein said conductor is disposed between said first flexible ribbon and said second flexible ribbon in a zig zag pattern.

8. The disposable sensor according to claim 5, wherein each of said first and second flexible ribbons is formed from a thermoplastic elastomer.

9. The disposable sensor according to claim 1, wherein said connector assembly comprising:

a first connector portion for releasably receiving said first free end of said flexible ribbon, wherein said first connector portion being adapted to engage a portion of said conductor located adjacent said first conductor free end; and

a second connector portion for releasably receiving said second free end of said flexible ribbon, wherein said second connector portion being adapted to engage a portion of said conductor located adjacent said second conductor free end.

12. The disposable sensor according to claim 1, wherein each of said at least one flexible stretchable ribbon has a woven construction.

13. The disposable sensor according to claim 12, said stretchable ribbon comprises:

a plurality of longitudinally extending flexible strands; and

a plurality of laterally extending flexible strands, wherein said each of said laterally extending flexible strands interconnects said plurality of longitudinally extending flexible strands.

14. The disposable sensor according to claim 13, wherein said plurality of longitudinally extending flexible strands are formed from an elastic material.

15. The disposable sensor according to claim 14, wherein each of said flexible stretchable ribbon comprises:

a first flexible ribbon having a woven construction; and

a second flexible ribbon having a woven construction secured to said first flexible ribbon, wherein said conductor is located between said first and second flexible ribbons.

3. A disposable sensor for monitoring changes in volume of an expandable organ of a patient, comprising:

at least one flexible stretchable ribbon adapted to encircle a portion of the patient, wherein each of said at least one flexible stretchable ribbon includes a conductor secured thereto, wherein each of said at least one flexible stretchable ribbon has a first free end and a second free end; and

a connector assembly for connecting and securing said first free end to said second free end, wherein said connector assembly is operatively coupled to said conductor, and is adapted to be connected to a monitoring device such that said connector assembly transmits changes in inductance of said conductor to the monitoring device, wherein said connector assembly includes a compression assembly for mechanically compressing said conductor.

4. The disposable sensor according to claim 3, wherein said conductor comprises a conductive wire having an outer insulation layer, wherein said compression assembly cuts away said outer insulation layer.

10. A disposable sensor for monitoring changes in volume of an expandable organ of a patient, comprising:

at least one flexible stretchable ribbon adapted to encircle a portion of the patient, wherein each of said at least one flexible stretchable ribbon includes a conductor secured thereto, wherein each of said at least one flexible stretchable ribbon has a first free end and a second free end; and

a connector assembly for connecting and securing said first free end to said second free end, wherein said connector assembly is operatively coupled to said conductor, and is adapted to be connected to a monitoring device such that said connector assembly transmits changes in inductance of said conductor to the monitoring device, wherein said connector assembly comprising;

a first connector portion for releasably receiving said first free end of said flexible ribbon, wherein said first connector portion being adapted to engage a portion of said conductor located adjacent said first free end; and

a second connector portion for releasably receiving said second free end of said flexible ribbon, wherein said second connector portion being adapted to engage a portion of said conductor located adjacent said second free end, wherein each of said first connector portion and said second connector portion includes a compression assembly for mechanically compressing said conductor.

11. The disposable sensor according to claim 10, wherein said conductor includes a conductive wire having an outer insulation layer, wherein said compression assembly cuts away said outer insulation layer.

16. A method of measuring and monitoring changes in volume of an expandable organ of a patient, comprising:

providing a supply of a flexible disposable sensor ribbon;

cutting a length of the flexible disposable sensor ribbon to encircle a torso of the patient;

securing a first end of the length to a releasable connector assembly;

securing a second end of the length the releasable connector assembly;

connecting the releasable connector assembly to a monitoring assembly; and

monitoring changes in inductance of the flexible disposable sensor ribbon to measure and monitor the volume changes in the expandable organ of the patient.

17. The method according to claim 16, wherein the flexible disposable sensor ribbon comprises a flexible stretchable ribbon having a conductor secured thereto.

18. The method according to claim 16, wherein said securing a first end of the length of ribbon to a releasable connector assembly includes connecting the conductor to the releasable connector assembly, and said securing a second end of the length of ribbon to the releasable connector assembly includes connecting the conductor to the releasable connector assembly.

19. The method according to claim 18, wherein the releasable connector assembly includes a first connector portion for releasably receiving the first end of the length of ribbon, and a second connector portion for releasably receiving the second free end of the length of ribbon.

20. The method according to claim 16, further comprising:

disposing of the length of the flexible disposable sensor ribbon after monitoring changes in inductance of the flexible disposable sensor ribbon.