US Patent No: 5,259,381
Number of patents in Portfolio can not be more than 2000
Apparatus for the automatic calibration of signals employed in oximetry
Stats
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Nov 9, 1993
Issued date -
Jul 10, 1989
filing date -
07/377,722
serial no -
Expired
status
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Abstract
Under the present invention, a method and apparatus are provided for compensating for the effect temperature variations have on the wavelength of light emitted by the oximeter sensor light source (40, 42). In pulse oximetry, LEDs (40, 42) are typically employed to expose tissue to light at two different wavelengths. The light illuminating the tissue is received by a detector (38) where signals proportional to the intensity of light are produced. These signals are then processed by the oximeter circuitry to produce an indication of oxygen saturation. Because current oximetry techniques are dependent upon the wavelengths of light emitted by the LEDs (40, 42), the wavelengths must be known. Even when predetermined combinations of LEDs (40, 42) having relatively precise wavelengths are employed, variations in the wavelength of light emitted may result. Because the sensor (12) may be exposed to a significant range of temperatures while in use, the effect of temperature on the wavelengths may be significant. To compensate for this effect, a temperature sensor (50) is included in the sensor (12) to produce a signal indicative of sensor temperature. This signal is interpreted by the oximeter circuitry including, for example, a microcomputer (16), where the effect of temperature on wavelength is compensated for. In a preferred arrangement, this compensation takes the form of a computation of an alternative calibration curve from which the oxygen saturation is indicated, given a particular processing of signals from the detector (38).
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First Claim
Related Publications
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
| Patent Owner | Address | Total Patents |
|---|---|---|
| CREDITANSTALT BANKVEREIN | SAN FRANCISCO, CA | 138 |
| NELLCOR PURITAN BENNETT INCORPORATED | PLEASANTON, CA | 217 |
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Inventor(s)
| Inventor Name | Address | # of filed Patents | Total Citations |
|---|---|---|---|
| Cheung, Peter W | Mercer Island, WA | 6 | 804 |
| Gauglitz, Karl F | Redmond, WA | 6 | 1016 |
| Hunsaker, Scott W | Boulder, CO | 5 | 779 |
| Prosser, Stephen J | Bothell, WA | 9 | 1190 |
| Smith, Robert E | Strongsville, OH | 95 | 2058 |
| Wagner, Darrell O | Gold Bar, WA | 25 | 879 |
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,723,554 Skin pallor and blush monitor | 56 | 1986 | |
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| 4,586,513 Noninvasive device for photoelectrically measuring the property of arterial blood | 180 | 1983 | |
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| 4,685,464 Durable sensor for detecting optical pulses | 243 | 1985 | |
Patent Citation Ranking
Forward Cites
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 6,351,658 Multiple-code oximeter calibration element | 100 | 1999 | |
| 6,606,510 Oximeter sensor with digital memory encoding patient data | 93 | 2001 | |
| 6,591,123 Oximeter sensor with digital memory recording sensor data | 118 | 2001 | |
| 6,553,241 Oximeter sensor with digital memory encoding sensor expiration data | 222 | 2001 | |
| 7,085,597 Oximeter sensor with digital memory recording sensor data | 87 | 2003 | |
| 7,689,259 Pulse oximeter sensor with piece-wise function | 2 | 2004 | |
| 7,657,294 Compliant diaphragm medical sensor and technique for using the same | 6 | 2005 | |
| 7,657,295 Medical sensor and technique for using the same | 7 | 2005 | |
| 8,092,379 Method and system for determining when to reposition a physiological sensor | 0 | 2005 | |
| 7,904,130 Medical sensor and technique for using the same | 1 | 2005 | |
| 7,899,510 Medical sensor and technique for using the same | 1 | 2005 | |
| 7,869,850 Medical sensor for reducing motion artifacts and technique for using the same | 2 | 2005 | |
| 8,233,954 Mucosal sensor for the assessment of tissue and blood constituents and technique for using the same | 0 | 2005 | |
| 8,133,176 Method and circuit for indicating quality and accuracy of physiological measurements | 0 | 2005 | |
| 8,078,246 Pulse oximeter sensor with piece-wise function | 0 | 2005 | |
| 8,062,221 Sensor for tissue gas detection and technique for using the same | 0 | 2005 | |
| 7,881,762 Clip-style medical sensor and technique for using the same | 1 | 2005 | |
| 8,073,518 Clip-style medical sensor and technique for using the same | 1 | 2006 | |
| 8,068,889 Oximeter sensor with digital memory encoding sensor data | 0 | 2006 | |
| 8,060,170 Method and circuit for storing and providing historical physiological data | 0 | 2006 | |
| 8,010,173 Method and circuit for storing and providing historical physiological data | 0 | 2006 | |
| 8,000,760 Method and circuit for storing and providing historical physiological data | 1 | 2006 | |
| 7,983,729 Method and circuit for storing and providing historical physiological data | 0 | 2006 | |
| 7,949,380 Oximeter sensor with digital memory encoding sensor data | 1 | 2006 | |
| 7,904,131 Method and circuit for storing and providing historical physiological data | 0 | 2006 | |
| 7,881,761 Method and circuit for storing and providing historical physiological data | 0 | 2006 | |
| 7,809,419 Oximeter sensor with digital memory encoding sensor data | 0 | 2006 | |
| 7,764,983 Method and circuit for storing and providing historical physiological data | 0 | 2006 | |
| 7,957,781 Method and circuit for storing and providing historical physiological data | 0 | 2006 | |
| 8,433,383 Stacked adhesive optical sensor | 0 | 2006 | |
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| 8,060,171 Medical sensor for reducing motion artifacts and technique for using the same | 1 | 2006 | |
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| 8,190,224 Medical sensor for reducing signal artifacts and technique for using the same | 1 | 2006 | |
| 8,190,225 Medical sensor for reducing signal artifacts and technique for using the same | 0 | 2006 | |
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| 7,869,849 Opaque, electrically nonconductive region on a medical sensor | 2 | 2006 | |
| 7,890,153 System and method for mitigating interference in pulse oximetry | 0 | 2006 | |
| 7,796,403 Means for mechanical registration and mechanical-electrical coupling of a faraday shield to a photodetector and an electrical circuit | 1 | 2006 | |
| 8,175,667 Symmetric LED array for pulse oximetry | 0 | 2006 | |
| 8,068,891 Symmetric LED array for pulse oximetry | 0 | 2006 | |
| 7,684,842 System and method for preventing sensor misuse | 1 | 2006 | |
| 7,680,522 Method and apparatus for detecting misapplied sensors | 0 | 2006 | |
| 7,499,740 Techniques for detecting heart pulses and reducing power consumption in sensors | 5 | 2007 | |
| 8,280,469 Method for detection of aberrant tissue spectra | 0 | 2007 | |
| 8,265,724 Cancellation of light shunting | 0 | 2007 | |
| 7,894,869 Multiple configuration medical sensor and technique for using the same | 1 | 2007 | |
| 7,794,266 Device and method for reducing crosstalk | 0 | 2007 | |
| 8,352,004 Medical sensor and technique for using the same | 0 | 2007 | |
| 8,346,328 Medical sensor and technique for using the same | 0 | 2007 | |
| 8,190,226 Sensor with signature of data relating to sensor | 0 | 2008 | |
| 8,071,935 Optical detector with an overmolded faraday shield | 1 | 2008 | |
| 7,887,345 Single use connector for pulse oximetry sensors | 0 | 2008 | |
| 7,880,884 System and method for coating and shielding electronic sensor components | 0 | 2008 | |
| D626561 Circular satseconds indicator and triangular saturation pattern detection indicator for a patient monitor display panel | 11 | 2008 | |
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| 8,199,007 Flex circuit snap track for a biometric sensor | 0 | 2008 | |
| 8,352,009 Medical sensor and technique for using the same | 0 | 2009 | |
| 8,386,002 Optically aligned pulse oximetry sensor and technique for using the same | 0 | 2009 | |
| 7,658,652 Device and method for reducing crosstalk | 1 | 2009 | |
| 8,221,319 Medical device for assessing intravascular blood volume and technique for using the same | 0 | 2009 | |
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| 8,112,375 Wavelength selection and outlier detection in reduced rank linear models | 0 | 2009 | |
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| 8,352,010 Folding medical sensor and technique for using the same | 0 | 2009 | |
| 8,311,602 Compliant diaphragm medical sensor and technique for using the same | 0 | 2009 | |
| 8,315,685 Flexible medical sensor enclosure | 0 | 2009 | |
| 8,311,601 Reflectance and/or transmissive pulse oximeter | 0 | 2009 | |
| 8,391,941 System and method for memory switching for multiple configuration medical sensor | 0 | 2009 | |
| 8,417,310 Digital switching in multi-site sensor | 0 | 2009 | |
| 8,428,675 Nanofiber adhesives used in medical devices | 0 | 2009 | |
| 8,224,412 Pulse oximeter sensor with piece-wise function | 0 | 2010 | |
| 8,260,391 Medical sensor for reducing motion artifacts and technique for using the same | 0 | 2010 | |
| 8,437,826 Clip-style medical sensor and technique for using the same | 0 | 2011 | |
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| RE38492 Signal processing apparatus and method | 260 | 2002 | |
| RE38476 Signal processing apparatus | 256 | 2002 | |
| 6,826,419 Signal processing apparatus and method | 247 | 2002 | |
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| 7,254,433 Signal processing apparatus | 173 | 2003 | |
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| 7,499,741 Signal processing apparatus and method | 56 | 2004 | |
| 7,215,984 Signal processing apparatus | 217 | 2004 | |
| 7,383,070 Signal processing apparatus | 80 | 2004 | |
| 7,215,986 Signal processing apparatus | 112 | 2005 | |
| 7,377,794 Multiple wavelength sensor interconnect | 73 | 2006 | |
| 7,489,958 Signal processing apparatus and method | 57 | 2006 | |
| 7,454,240 Signal processing apparatus | 51 | 2006 | |
| 8,046,041 Signal processing apparatus | 6 | 2007 | |
| 8,046,042 Signal processing apparatus | 6 | 2007 | |
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| 8,180,420 Signal processing apparatus and method | 3 | 2007 | |
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| 8,128,572 Signal processing apparatus | 3 | 2008 | |
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| 7,957,780 Physiological parameter confidence measure | 15 | 2006 | |
| 7,764,982 Multiple wavelength sensor emitters | 22 | 2006 | |
| 7,761,127 Multiple wavelength sensor substrate | 31 | 2006 | |
| 7,729,733 Configurable physiological measurement system | 38 | 2006 | |
| 7,647,083 Multiple wavelength sensor equalization | 40 | 2006 | |
| 7,596,398 Multiple wavelength sensor attachment | 43 | 2006 | |
| 7,563,110 Multiple wavelength sensor interconnect | 46 | 2008 | |
| 8,385,996 Multiple wavelength sensor emitters | 0 | 2009 | |
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| 8,255,027 Multiple wavelength sensor substrate | 0 | 2010 | |
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| 5,807,247 Method and apparatus for facilitating compatibility between pulse oximeters and sensor probes | 126 | 1995 | |
| 6,115,621 Oximetry sensor with offset emitters and detector | 110 | 1997 | |
| 7,590,439 Bi-stable medical sensor and technique for using the same | 2 | 2005 | |
| 7,555,327 Folding medical sensor and technique for using the same | 3 | 2005 | |
| 7,486,979 Optically aligned pulse oximetry sensor and technique for using the same | 2 | 2005 | |
| 7,483,731 Medical sensor and technique for using the same | 5 | 2005 | |
| 7,522,948 Medical sensor and technique for using the same | 3 | 2006 | |
| 7,477,924 Medical sensor and technique for using the same | 2 | 2006 | |
| 7,574,245 Flexible medical sensor enclosure | 1 | 2006 | |
|
|
|||
| 6,343,223 Oximeter sensor with offset emitters and detector and heating device | 99 | 2000 | |
| 8,185,178 Oximeter sensor with digital memory encoding patient data | 0 | 2005 | |
| 8,090,425 Oximeter sensor with digital memory encoding patient data | 0 | 2005 | |
| 8,112,136 Method and circuit for storing and providing historical physiological data | 0 | 2006 | |
| 8,103,325 Method and circuit for storing and providing historical physiological data | 1 | 2006 | |
| 8,064,974 Method and circuit for storing and providing historical physiological data | 0 | 2006 | |
| 8,112,137 Method and circuit for storing and providing historical physiological data | 0 | 2006 | |
| 8,095,195 Method and circuit for storing and providing historical physiological data | 0 | 2006 | |
| 8,078,247 Method and circuit for storing and providing historical physiological data | 1 | 2006 | |
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| 5,934,277 System for pulse oximetry SpO2 determination | 163 | 1995 | |
| 5,564,108 Non-invasive software update apparatus | 73 | 1995 | |
| 6,385,471 System for pulse oximetry SpO2 determination | 96 | 1999 | |
| 6,714,803 Pulse oximetry SpO2 determination | 105 | 2001 | |
| 6,987,994 Pulse oximetry SpO2 determination | 33 | 2003 | |
| 7,841,985 Sensor identification method and system | 0 | 2006 | |
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| 6,356,774 Oximeter sensor with encoded temperature characteristic | 181 | 1999 | |
| 6,628,975 Oximeter sensor with digital memory storing data | 100 | 2001 | |
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| 6,889,153 System and method for a self-calibrating non-invasive sensor | 58 | 2001 | |
| 7,124,048 System and method for a self-calibrating non-invasive sensor | 2 | 2004 | |
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| 7,815,861 Analysis method, analysis device and production method therefor | 0 | 2003 | |
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| 7,047,054 Laser diode optical transducer assembly for non-invasive spectrophotometric blood oxygenation monitoring | 26 | 2001 | |
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| 8,271,063 System and method for a non-invasive medical sensor | 0 | 2007 | |
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| 5,800,349 Offset pulse oximeter sensor | 123 | 1997 | |
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| 6,760,610 Sensor and method for measurement of physiological parameters | 90 | 2001 | |
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| 5,772,589 Measurement process for blood gas analysis sensors | 17 | 1996 | |
| 8,442,608 System and method for estimating physiological parameters by deconvolving artifacts | 0 | 2008 | |
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |