Douglas Lee Cox
Engineers in Littleton, UT
License number
Utah 323775-2202
Category
Engineer/Land Surveyor
Type
Professional Engineer
Address
Address
Littleton, UT
Professional information
Sensor For Transcutaneous Measurement Of Vascular Access Blood Flow
US Patent:
6804543, Oct 12, 2004
Filed:
Mar 19, 2002
Appl. No.:
10/099974
Inventors:
David R. Miller - Morgan UT
David A. Bell - Farmington UT
Douglas L. Cox - Morgan UT
Songbiao Zhang - Sandy UT
David A. Bell - Farmington UT
Douglas L. Cox - Morgan UT
Songbiao Zhang - Sandy UT
Assignee:
Hema Metrics, Inc. - Kaysville UT
International Classification:
A61B 500
US Classification:
600310, 600322
Abstract:
An optical sensor includes a sensing pair of complementary emitter and detector elements for measuring the bulk absorptivity () of an area parallel to and including a hemodialysis access site, and a normalizing pair of complementary emitter and detector elements for measuring the absorptivity ( ) of the tissue itself perpendicular to the access site. The pairs of emitter and detector elements define two lines at right angles to each other, and one of the pairs lies to one side of the line defined by the other of the pairs, such that the two pairs of emitter and detector elements form a âTâ shape. Indicator dilution techniques are used to measure vascular access flow rates during routine hemodialysis, using the sensor.
Bladder-Based Cuff For Measuring Physiological Parameters And Method Of Measuring Physiological Parameters Using Same
US Patent:
7247143, Jul 24, 2007
Filed:
Oct 29, 2003
Appl. No.:
10/695441
Inventors:
Perry N. Law - Centerville UT, US
Douglas L. Cox - Morgan UT, US
David R. Miller - Morgan UT, US
David A. Bell - Farmington UT, US
Douglas L. Cox - Morgan UT, US
David R. Miller - Morgan UT, US
David A. Bell - Farmington UT, US
Assignee:
Hema Metrics, Inc. - Kaysville UT
International Classification:
A61B 5/02, A61B 17/00
US Classification:
600499, 606202
Abstract:
A cuff for measuring volume and change in volume of a body appendage includes a hollow, rigid tube having an inner surface; and a bladder having an inner surface and an outer surface, the ends of the bladder being sealed to the ends of the tube to create an enclosed internal volume between the inner surface of the bladder and the inner surface of the tube and an external volume defined by the outer surface of the bladder and surrounded by the internal volume, the bladder having a normal, relaxed state, in which the internal volume is filled with a fluid and a retracted state in which the fluid is evacuated from the internal volume. Two stiffener ribs placed on the inner surface of the bladder, parallel to each other and to the lengthwise axis of the tube at diametrically opposite positions. A plurality of emitters and detectors arranged in a linear array are embedded in one of the ribs, so as to emit and detect light through the bladder. A fluid port extending through the tube and communicating with the internal volume, through which the internal volume can be filled with or emptied of the fluid.
Bladder-Based Cuff For Measuring Physiological Parameters And Method Of Measuring Physiological Parameter Using Same
US Patent:
7708694, May 4, 2010
Filed:
Jul 24, 2007
Appl. No.:
11/878342
Inventors:
Perry N. Law - Centerville UT, US
Douglas L. Cox - Morgan UT, US
David R. Miller - Morgan UT, US
David A. Bell - Farmington UT, US
Douglas L. Cox - Morgan UT, US
David R. Miller - Morgan UT, US
David A. Bell - Farmington UT, US
Assignee:
Hema Metrics, Inc. - Kaysville UT
International Classification:
A61B 5/00
US Classification:
600499, 600490
Abstract:
A cuff for measuring volume and change in volume of a body appendage includes a hollow, rigid tube having an inner surface; and a bladder having an inner surface and an outer surface, the ends of the bladder being sealed to the ends of the tube to create an enclosed internal volume between the inner surface of the bladder and the inner surface of the tube and an external volume defined by the outer surface of the bladder and surrounded by the internal volume, the bladder having a normal, relaxed state, in which the internal volume is filled with a fluid and a retracted state in which the fluid is evacuated from the internal volume. Two stiffener ribs placed on the inner surface of the bladder, parallel to each other and to the lengthwise axis of the tube at diametrically opposite positions. A plurality of emitters and detectors arranged in a linear array are embedded in one of the ribs, so as to emit and detect light through the bladder. A fluid port extending through the tube and communicating with the internal volume, through which the internal volume can be filled with or emptied of the fluid.
Sensor Clip Assembly For An Optical Monitoring System
US Patent:
2012012, May 17, 2012
Filed:
Feb 18, 2011
Appl. No.:
13/030212
Inventors:
Louis L. Barrett - West Point UT, US
David W. Peterson - Clinton UT, US
N. Diane Hudkins - Hooper UT, US
Matthew A. Stowell - South Ogden UT, US
Kristian A. Sammann - Murray UT, US
Benjamin D. Jensen - Logan UT, US
Douglas L. Cox - Morgan UT, US
Perry N. Law - Centerville UT, US
Ronald S. Glaittli - Bountiful UT, US
David W. Peterson - Clinton UT, US
N. Diane Hudkins - Hooper UT, US
Matthew A. Stowell - South Ogden UT, US
Kristian A. Sammann - Murray UT, US
Benjamin D. Jensen - Logan UT, US
Douglas L. Cox - Morgan UT, US
Perry N. Law - Centerville UT, US
Ronald S. Glaittli - Bountiful UT, US
Assignee:
HEMA METRICS, LLC - Kaysville UT
International Classification:
G01N 33/48
US Classification:
356 41, 356 39, 356 40
Abstract:
A sensor clip assembly for an optical blood monitoring system includes a circuit board with a microprocessor that is programmed with a ratiometric model to calculate hematocrit and/or oxygen saturation levels of a patient.