Pulse and active pulse spectraphotometry

• US 20060052680A1
• Filed: 10/31/2005
• Published: 03/09/2006
• Est. Priority Date: 02/22/2002
• Status: Active Grant

• Current Assignee: Masimo Corporation
• Original Assignee: Cercacor Laboratories
• Inventors: Diab, Mohamed K.
• Granted Patent: US 8,606,342 B2
• Time in Patent Office: Days
• US Class Current: 600/310
• CPC Class Codes: A61B 5/0059 using light, e.g. diagnosis by transillumination, diascopy, fluorescence A61B5/0093, A61B5/1455, A61B5/02416 and A61B5/0261 take precedence
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/6838 Clamps or clips

Abstract

A pulse and active pulse spectraphotometry system comprises a light source adapted to illuminate a tissue site with optical radiation having a plurality of wavelengths selected from at least one of a primary band of about 1620 nm to about 1730 nm and a secondary band of about 1000 nm to about 1380 nm.

Claims

1. A noninvasive optical sensor capable of outputting a signal usable by a patient monitor to determine one or more physiological parameters of a wearer of the optical sensor, the optical sensor comprising:

a plurality of emitters capable of emitting optical radiation within a plurality of wavelength bands including a first wavelength band in a range of about 1620 nm to about 1730 nm and a second wavelength band in a range of about 1000 nm to about 1380 nm, and

a detector capable of detecting the optical radiation after attenuation by body tissue and of outputting a signal indicative of the attenuation by the body tissue, the signal being usable by a patient monitor to determine one or more physiological parameters of the body tissue.

2. The noninvasive optical sensor according to claim 1 wherein said first wavelength band is in a range of about 1620 nm to about 1670 nm.

3. The noninvasive optical sensor according to claim 2 wherein said first wavelength band is in a range of about 1650 nm±

5 nm.

4. The noninvasive optical sensor according to claim 1 wherein said second wavelength band is in a range of about 1032 nm±

5 nm.

5. The noninvasive optical sensor according to claim 4 wherein said second wavelength band is in a range of about 1097 nm±

5 nm.

6. The noninvasive optical sensor according to claim 4 wherein said second wavelength band is in a range of about 1375 nm±

5 nm.

7. The noninvasive optical sensor according to claim 1 wherein said plurality of wavelength bands also includes a third wavelength band in a range of about 2000 nm to about 2500 nm.

8. A method of acquiring a signal usable to determine one or more physiological parameters of body tissue, the method comprising:

illuminating body tissue with optical radiation selected from a plurality of wavelength bands including a first wavelength band in a range of about 1620 nm to about 1730 nm and a second wavelength band in a range of about 1000 nm to about 1380 nm;

detecting the optical radiation after attenuation by the body tissue; and

outputting a signal indicative of the attenuation, the signal being usable by a patient monitor to determine one or more physiological parameters of the body tissue.

9. The method according to claim 8 wherein said first wavelength band is in a range of about 1620 nm to about 1670 nm.

10. The method according to claim 9 wherein said first wavelength band is in a range of about 1650 nm±

5 nm.

11. The method according to claim 8 wherein said second wavelength band is in a range of about 1032 nm±

5 nm.

12. The method according to claim 11 wherein said second wavelength band is in a range of about 1097 nm±

5 nm.

13. The method according to claim 11 wherein said second wavelength band is in a range of about 1375 nm±

5 nm.

14. The method according to claim 8 wherein said plurality of wavelength bands also includes a third wavelength band in a range of about 2000 nm to about 2500 nm.

15. A patient monitoring system, comprising:

means for illuminating body tissue with optical radiation selected from a plurality of wavelength bands including a first wavelength band in a range of about 1620 nm to about 1730 nm and a second wavelength band in a range of about 1000 nm to about 1380 nm;

means for detecting the optical radiation after attenuation by the body tissue and outputting a signal indicative of the attenuation; and

means for processing the signal to determine one or more physiological parameters of the body tissue.

16. The noninvasive optical sensor according to claim 15 wherein said first wavelength band is in a range of about 1620 nm to about 1670 nm.

17. The noninvasive optical sensor according to claim 16 wherein said first wavelength band is in a range of about 1650 nm±

5 nm.

18. The noninvasive optical sensor according to claim 15 wherein said second wavelength band is in a range of about 1032 nm±

5 nm.

19. The noninvasive optical sensor according to claim 18 wherein said second wavelength band is in a range of about 1097 nm±

5 nm.

20. The noninvasive optical sensor according to claim 18 wherein said second wavelength band is in a range of about 1375 nm±

5 nm.