US Patent No: 5,158,091

Number of patents in Portfolio can not be more than 2000

Tonometry system for determining blood pressure

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Abstract

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A tissue contact stress sensing system incorporates a semiconductor assembly and a continuous diaphragm to noninvasively determine the intra-arterial blood pressure of a patient. The system comprises a continuous diaphragm placed against a patient's tissue which covers an underlying artery. The semiconductor assembly is placed in close proximity to and spaced apart from the diaphragm for directly irradiating the diaphragm with electromagnetic radiation and receiving a portion of the electromagnetic radiation which is reflected from the continuous diaphragm. The disclosed system also utilizes a technique for minimizing the system errors associated with temperature drift and aging of the sensor.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CAREFUSION 303, INC.SAN DIEGO, CA454

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Butterfield, Robert D Poway, CA 56 1365
Holdaway, Charles R San Diego, CA 14 508
Martin, Stephen A Carlsbad, CA 19 627
Pytel, Kenneth J San Diego, CA 6 285

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
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MEDEX, INC. (1)
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OMRON HEALTHCARE CO., LTD. (1)
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JPMORGAN CHASE BANK, N.A. (1)
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RCA Corporation (1)
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RADI MEDICAL SYSTEMS AB (2)
* 4,712,566 Device for recording physiological pressures 33 1986
* 5,085,223 Miniaturized pressure sensor having means for protection of diaphragm 50 1990
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (5)
* 5,971,931 Biologic micromonitoring methods and systems 47 1994
* 2004/0220,484 Method of measuring transcutaneous access blood flow 3 2004
9,357,933 Continuous, non-invasive, optical blood pressure monitoring system 0 2011
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* 2008/0181,556 Waveguide and Optical Motion Sensor Using Optical Power Modulation 2 2007
7,657,135 Waveguide and optical motion sensor using optical power modulation 7 2008
8,111,953 Optical power modulation vital sign detection method and measurement device 4 2010
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8,467,636 Optical power modulation vital sign detection method and measurement device 1 2012
9,277,868 Optical power modulation vital sign detection method and measurement device 0 2013
 
GAMBRO DASCO S.P.A. (2)
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LIFESYNC CORPORATION (2)
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IN-LINE DIAGNOSTICS (2)
6,746,407 Method of measuring transcutaneous access blood flow 10 2000
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TENSYS MEDICAL, INC. (14)
6,514,211 Method and apparatus for the noninvasive determination of arterial blood pressure 88 2000
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8,597,195 Method and apparatus for non-invasively measuring hemodynamic parameters using parametrics 0 2011
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VITAL WAVE CORPORATION (1)
6,471,655 Method and apparatus for the noninvasive determination of arterial blood pressure 40 1999
 
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GAMBRO LUNDIA AB (2)
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9,002,655 Medical apparatus for extracorporeal blood treatment and method for determining a blood parameter value in a medical apparatus thereof 4 2010
 
Aortic Wrap Pty Ltd. (2)
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OSRAM AG (3)
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CAREFUSION 303, INC. (5)
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* 5,284,150 Tonometry system for determining blood pressure 34 1992
* 5,261,412 Method of continuously monitoring blood pressure 38 1992
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6,290,650 Tonometry system for monitoring blood pressure 44 1999
 
SUMMIT DOPPLER SYSTEMS, INC. (4)
* 2009/0099,465 SYSTEM AND METHOD FOR A NON-SUPINE EXTREMITY BLOOD PRESSURE RATIO EXAMINATION 2 2008
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9,375,150 Identification of pressure cuff conditions using frequency content of an oscillometric pressure signal 0 2012
 
BAXTER INTERNATIONAL INC. (4)
6,985,870 Medication delivery system 191 2002
7,668,731 Medication delivery system 20 2003
8,775,196 System and method for notification and escalation of medical data 0 2003
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TRUSTEES OF BOSTON UNIVERSITY (2)
6,546,813 Patient monitoring system employing array of force sensors on a bedsheet or similar substrate 22 2001
6,840,117 Patient monitoring system employing array of force sensors on a bedsheet or similar substrate 55 2003
 
Advanced Body Metrics Corporation (1)
* 5,509,423 Pump band 11 1993
 
HEMA METRICS, LLC (1)
6,687,519 System and method for measuring blood urea nitrogen, blood osmolarity, plasma free hemoglobin and tissue water content 66 2001
 
The Commonwealth of Australia (1)
6,693,417 Micro-electronic bond degradation sensor and method of manufacture 6 2002
 
FRONTIER MATERIALS, INC. (1)
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HEMA METRICS, INC. (3)
6,987,993 Sensor for transcutaneous measurement of vascular access blood flow 3 2003
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MALLINCKRODT INC. (3)
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DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION OF THE DEPARTMENT OF DEFENCE (1)
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RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY (2)
* 5,439,001 Flexible diaphragm tonometer 25 1993
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In-Line Diagnostics Corporation (4)
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6,266,546 System for noninvasive hematocrit monitoring 179 1998
* Cited By Examiner