Pulse oximetry sensor

• US 5,437,275 A
• Filed: 02/02/1994
• Issued: 08/01/1995
• Est. Priority Date: 02/02/1994
• Status: Expired due to Term

• Current Assignee: Smiths Medical ASD, Inc. (Smiths Group International Holdings Ltd.)
• Original Assignee: Biochem International, Inc.
• Inventors: Walters, Glenn T., Amundsen, Neil T.
• Primary Examiner(s): Sykes, Angela D.
• Application Number:
  US08/190,817
• Time in Patent Office: 545 Days
• Field of Search: 128/633-634, 128/664-667, 356/39-41
• US Class Current: 600/323
• CPC Class Codes: A61B 2046/205 Adhesive drapes
• CPC Class Codes: A61B 46/10 specially adapted for instruments, e.g. microscopes
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/6833 Adhesive patches
• CPC Class Codes: A61B 5/6838 Clamps or clips

Abstract

A pulse oximetry sensor comprises a photoemitter; a photodetector; and, a generally tubular housing having an inner wall, an outer wall and a lumen for receiving a body part of a patient. The housing has a pair of opposed pockets for removably receiving the photoemitter and the photodetector, respectively. Each of the pockets has a bottom window through which light can pass and an open top. The housing also has side passages between the inner wall and the outer wall of the housing through which the photoemitter and the photodetector can be introduced into and removed from their respective pockets.

Claims

1. A pulse oximetry sensor comprising a photoemitter;

a photodetector; and

, a generally tubular housing having an inner wall, an outer wall and a lumen for receiving a body part of a patient;

said housing having a pair of opposed pockets formed between the inner wall and the outer wall for removably receiving the photoemitter and the photodetector, respectively, said pockets each having a window in the inner wall through which light can pass and an aperture in the outer wall which aperture receives a portion of a respective one of the photoemitter and the photodetector;

said housing also having side passages between the inner wall and the outer wall with each passage having an opening in the housing through which the photoemitter and the photodetector can be introduced into and removed from their respective pockets.

2. A sensor of claim 1 in which the window of the housing is covered with a light transparent film.

3. A sensor of claim 1 in which the housing is formed from a wrap of disposable material.

4. A sensor of claim 1 in which the housing is molded of plastic.

5. A sensor of claim 1 in which the photoemitter and photodetector have deformable tops which are received in the aperture of a respective pocket.

6. A housing for a pulse oximetry sensor, said housing being a tubular body having an inner wall, an outer wall and a lumen for receiving a body part of a patient, said housing having a pair of opposed pockets for removably receiving a photoemitter and a photodetector, respectively, each of said pockets having a window in the inner wall through which light can pass and an aperture in the outer wall which aperture receives a portion of a respective one of the photoemitter and the photodetector, said housing also having passages between the inner wall and the outer wall with each passage having an opening in the housing through which a photoemitter and a photodetector can be introduced into and removed from the pockets.

7. A housing of claim 6 in which each of the windows is covered by a light transparent film.

8. A housing of claim 7 in which the housing is formed of a disposable material.

9. A housing of claim 7 in which the inner and outer walls are formed of a wrap of disposable material.

10. A housing of claim 9 wherein the disposable material is paper.

11. A housing of claim 6 in which the housing is molded of plastic.

12. A generally tubular housing for a pulse oximeter sensor, said housing having an inner wall with a pair of opposed windows and an outer wall with a pair of apertures aligned with said windows so that a pair of opposed pockets for receiving a photoemitter and a photodetector are formed with each pocket having a window at the bottom and an aperture at the top, said inner and outer walls being spaced apart to form side passages with an opening in the housing through which either the photoemitter or the photodetector can be introduced into one or both of said pockets.

13. A housing of claim 12 in which the inner wall includes a layer of cushioning material.

14. A housing of claim 12 in which the window is covered by a transparent film.

15. A housing for a pulse oximeter sensor, said housing formed by a strip of material coiled in a spiral to form an inner wall, an outer wall and a lumen, with a pair of opposed pockets being formed between the inner and outer walls for receiving a photoemitter and a photodetector, respectively, each pocket having a window that extends through the inner wall;

the inner and outer walls are spaced apart to form passages through which one of the photoemitter and the photodetector can be introduced into each of the pockets.

16. A housing of claim 15 wherein each pocket has an aperture aligned with the window for receiving a portion of one of the photoemitter and the photodetector.

17. A sensor of claim 16 further comprising a transparent film applied to a surface of the strip of material and extending across each window.