Measuring Cerebral Oxygen Saturation

Patent metadata

Field	Value
Publication number	US-2017215780-A1
Application number	US-201715485171-A
Country	US
Kind code	A1
Filing date	Apr 11, 2017
Priority date	Jun 20, 2007
Publication date	Aug 3, 2017
Grant date	—

Abstract

A device includes source and detector sensors. In a specific implementation, the device has two near detectors, two far detectors, and two sources. The two near detectors are arranged closer to the two sources than the two far detectors. A light-diffusing layer covers the two near detectors. The device may be part of a medical device that is used to monitor or measure oxygen saturation levels in a tissue. In a specific implementation, light is transmitted into the tissue and received by the detectors. An attenuation coefficient is first calculated for a shallow layer of tissue. The attenuation coefficient is then used to calculate an attenuation coefficient for a deep layer of tissue.

First claim

The invention claimed is:

1 . A device comprising:
a first source structure; a first near detector structure; a first far detector structure; and a light diffusing layer, wherein the first near detector structure receives a beam of light after the beam of light has been transmitted through a tissue and the light diffusing layer.

2 . The device of claim 1 wherein the first source structure, first near detector structure, and first far detector structure are arranged in a line.

3 . The device of claim 1 wherein a first distance between the first source structure and the first near detector structure is different from a second distance between the first source structure and first far detector structure.

4 . The device of claim 3 wherein the first distance is less than the second distance.

5 . The device of claim 3 wherein the first distance is approximately 30 millimeters.

6 . The device of claim 3 wherein the second distance is approximately 40 millimeters.

7 . The device of claim 1 further comprising:
a second source structure;
a second near detector structure; and
a second far detector structure, wherein the second near detector structure receives the beam of light after the beam of light has been transmitted through the tissue and the light diffusing layer.

8 . The device of claim 7 wherein the second source structure, second near detector structure, and second far detector structure are arranged in a line.

9 . The device of claim 7 wherein a third distance between the second source structure and the second near detector structure is different from a fourth distance between the second source structure and second far detector structure.

10 . The device of claim 9 wherein the third distance is less than the fourth distance.

11 . The device of claim 9 wherein the third distance is approximately 30 millimeters.

12 . The device of claim 9 wherein the fourth distance is approximately 40 millimeters.

13 . The device of claim 1 wherein the light diffusing layer is a semitranslucent film.

14 . The device of claim 7 wherein the first near detector structure, the second near detector structure, the first far detector structure, and the second far detector structure comprise photodiodes.

15 . The device of claim 7 wherein the first source structure and second source structure comprise optical fiber.

16 . A probe, the probe being adapted for use as a part of a medical device system for measuring oxygen levels in a tissue, the probe comprising:
a sensor pad having a first cavity, a second cavity, and a third cavity, wherein a semitranslucent film is coupled to a bottom surface of the sensor pad and partially overlaps the first cavity; and a sensor arrangement comprising a plurality photodetectors coupled to the first cavity, a first source structure coupled to the second cavity, and a second source structure coupled to the third cavity.

Assignees

• Vioptix Inc

Inventors

• Mao Jimmy Jian-Min
• Lash Robert E

Classifications

• A61B2562/0242

  for varying or adjusting the optical path length in the tissue · CPC title

• A61B5/14552 Primary

  Details of sensors specially adapted therefor · CPC title

• A61B5/14553

  specially adapted for cerebral tissue · CPC title

• A61B2562/0238

  Optical sensor arrangements for performing transmission measurements on body tissue · CPC title

• A61B2562/043

  in a linear array · CPC title