WO2001044780A2 - Synchronized modulation/demodulation method and apparatus for frequency division multiplexed spectrophotometric system - Google Patents
Synchronized modulation/demodulation method and apparatus for frequency division multiplexed spectrophotometric system Download PDFInfo
- Publication number
- WO2001044780A2 WO2001044780A2 PCT/US2000/042644 US0042644W WO0144780A2 WO 2001044780 A2 WO2001044780 A2 WO 2001044780A2 US 0042644 W US0042644 W US 0042644W WO 0144780 A2 WO0144780 A2 WO 0144780A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- modulation
- demodulation
- waveforms
- light
- light sources
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
- A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00992665A EP1237469A2 (en) | 1999-12-17 | 2000-12-07 | Synchronized modulation/demodulation method and apparatus for frequency division multiplexed spectrophotometric system |
AU45200/01A AU4520001A (en) | 1999-12-17 | 2000-12-07 | Synchronized modulation/demodulation method and apparatus for frequency divisionmultiplexed spectrophotometric system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/465,304 | 1999-12-17 | ||
US09/465,304 US6363269B1 (en) | 1999-12-17 | 1999-12-17 | Synchronized modulation/demodulation method and apparatus for frequency division multiplexed spectrophotometric system |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001044780A2 true WO2001044780A2 (en) | 2001-06-21 |
WO2001044780A3 WO2001044780A3 (en) | 2002-01-03 |
Family
ID=23847249
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/042644 WO2001044780A2 (en) | 1999-12-17 | 2000-12-07 | Synchronized modulation/demodulation method and apparatus for frequency division multiplexed spectrophotometric system |
Country Status (4)
Country | Link |
---|---|
US (1) | US6363269B1 (en) |
EP (1) | EP1237469A2 (en) |
AU (1) | AU4520001A (en) |
WO (1) | WO2001044780A2 (en) |
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1999
- 1999-12-17 US US09/465,304 patent/US6363269B1/en not_active Expired - Lifetime
-
2000
- 2000-12-07 EP EP00992665A patent/EP1237469A2/en not_active Withdrawn
- 2000-12-07 AU AU45200/01A patent/AU4520001A/en not_active Abandoned
- 2000-12-07 WO PCT/US2000/042644 patent/WO2001044780A2/en not_active Application Discontinuation
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007122375A2 (en) | 2006-04-11 | 2007-11-01 | The University Of Nottingham | Photoplethysmography |
US8768424B2 (en) | 2006-04-11 | 2014-07-01 | The University Of Nottingham | Photoplethysmography |
US11103150B2 (en) | 2006-04-11 | 2021-08-31 | The University Of Nottingham | Photoplethysmography |
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WO2008029171A3 (en) * | 2006-09-08 | 2008-05-02 | Crowcon Detection Instr Ltd | Gas detector |
Also Published As
Publication number | Publication date |
---|---|
EP1237469A2 (en) | 2002-09-11 |
AU4520001A (en) | 2001-06-25 |
US6363269B1 (en) | 2002-03-26 |
WO2001044780A3 (en) | 2002-01-03 |
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