Pulse oximetry ear sensor

• US 7,341,559 B2
• Filed: 07/31/2003
• Issued: 03/11/2008
• Est. Priority Date: 09/14/2002
• Status: Active Grant

• Current Assignee: Masimo Corporation
• Original Assignee: Masimo Corporation
• Inventors: Mason, Eugene, Schulz, Christian, Kiani, Massi E.
• Primary Examiner(s): Nasser; Robert L.
• Application Number:
  US10/631,882
• Publication Number:
  US 20040054291A1
• Time in Patent Office: 1,685 Days
• Field of Search: 600300-301, 600309-312, 600322-326, 600/340, 600386-394, 381/FOR.134
• US Class Current: 600/309
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/6816 Ear lobe

Abstract

An embodiment of an ear sensor assembly comprises an emitter pad and a detector pad. A clip is configured to removably retain each of the pads. The clip has an open position for placement on an ear tissue site and a closed position for securing the pads to opposite sides of the site. The assembly includes a sensor connector adapted to electrically communicate with a host instrument. A sensor cable has a first end terminating at the pads and a second end terminating at the sensor connector and provides electrical communications between the pads and the connector. In one embodiment, one or more silicone lenses or removable adhesive tabs aid in relieving patient discomfort and pressure necrosis.

Claims

1. An ear sensor for providing one or more intensity signals representative of at least one physiological parameter of pulsing blood, the ear sensor comprising:

an emitter which emits light of at least first and second wavelengths;

a light-sensitive detector which provides intensity signals resulting from detection of the at least first and second wavelengths of the light after the light is attenuated by body tissue carrying pulsing blood;

a clip housing including one or more windows through which the light or the attenuated light will pass, wherein the clip housing also houses the emitter and the detector in movable proximity to one another; and

a plurality of tissue contacting surfaces configured to be positioned between the emitter and the tissue and between the detector and the tissue when the clip housing is applied to a measurement site, wherein the tissue contacting surfaces comprise silicone lenses and wherein said silicone lenses comprise a substantially translucent textured surface that increases a coefficient of friction between the silicone lenses and a tissue site.

2. The ear sensor according to claim 1, wherein said silicone lenses are pliable thereby increasing a surface area contacting the skin.

3. The ear sensor according to claim 1, wherein at least one of said silicone lenses is sized to have a surface area greater than a surface area defined by at least one of the windows.

4. The ear sensor according to claim 1, wherein optical properties of said silicone lenses are substantially similar to optical properties of glass.

5. The ear sensor according to claim 1, wherein said silicone lenses are injection molded.

6. The ear sensor according to claim 1, wherein said silicone lenses are one of partially hemispherical and convex in shape.

7. The ear sensor according to claim 1, wherein said silicone lenses are disk shaped.

8. The ear sensor according to claim 1, wherein said silicone lenses are rectangular.

9. The ear sensor according to claim 1, wherein said clip housing comprises a disposable clip and said emitter and detector are removable from said disposable clip.

10. The ear sensor according to claim 1 further comprising an attachment supplement, wherein the attachment supplement comprises an ear hanger adapted to fit around an ear portion so as to support at least a portion of the ear sensor weight.

11. The ear sensor according to claim 1 further comprising an attachment supplement, wherein the attachment supplement comprises an ear hanger comprising:

a formable stem having a first end and having a second end;

a generally semi-circular bend proximate said first end;

a generally right angle bend proximate said second end; and

a holder attached to second end and configured to accommodate a cable.

12. The ear sensor according to claim 1, wherein, in a closed position, said clip housing exerts a force on said tissue in the range of about 90 gram force to about 140 gram force.

13. The ear sensor according to claim 1, wherein, in a closed position, said clip housing exerts a force on a tissue site in the range of about 115 gram force to about 130 gram force.

14. An oximetry sensor comprising:

a plurality of opposing members each housing one of an emitter and a detector, and each including one or more windows covered by one or more silicone lenses, wherein said plurality of opposing members are configured to removably position said silicone lenses against the suitable tissue site and wherein said silicone lenses comprise a substantially translucent textured surface configured to aid in reducing movement of the sensor when the sensor is positioned against the tissue site.

15. The oximetry sensor of claim 14, wherein the plurality of opposing members is capable of removably positioning said silicone lenses against a patient'"'"'s ear.

16. The oximetry sensor of claim 15, wherein opposing members further comprise a plurality of extended ridges adapted to assist in releasing said plurality of opposing members from said tissue site.

17. The ear sensor according to claim 14 further comprising an attachment supplement.