1
Justin S Clark, William D Wallace: Noninvasive system and method for enhanced arterial oxygen saturation determination and arterial blood pressure monitoring. Medical Physics, Thorpe North Western, May 12, 1992: US05111817 (365 worldwide citation)

A noninvasive system and method for monitoring arterial oxygen saturation levels which may also be used to continuously and noninvasively monitor blood pressure, including generating a continuous blood pressure waveform. The apparatus of the described embodiment includes a red LED and an infrared LE ...


2
Justin S Clark, William D Wallace, Frederick L Farr: Sampling and determination of diffusible chemical substances. Intermountain Health Care, Criddle & Western, September 9, 1980: US04221567 (80 worldwide citation)

Method and system for sampling and determining chemical substances such as blood gases, in a fluid matrix, such as blood, by bringing the chemical substances into equilibrium with a liquid in a fiber probe, passing the equilibrated liquid to a sensor adjacent the equilibrium region and on into a hol ...


3
Justin S Clark, Lloyd G Veasy: Automated blood analysis system. Primary Children s Hospital, Lynn G Foster, August 29, 1978: US04109505 (51 worldwide citation)

A system for automatically withdrawing blood from a patient and testing various parameters of the blood, such as oxygen saturation, hemoglobin, gas content (PO.sub.2, PCO.sub.2) and pH, includes a withdrawal unit which automatically withdraws a measured volume of blood, and returns all of it to the ...


4
Justin S Clark: Non-airtight pulmonary measuring device. Intermountain Health Care, Primary Children s Medical Center, Criddle & Western, September 9, 1980: US04221224 (37 worldwide citation)

A non-airtight method for determining alveolar ventilation, oxygen uptake and carbon dioxide production which comprises introducing a known amount of an inert gas into the airway of a patient during inspiration and monitoring the expired gas until a steady state is reached wherein the volume of iner ...


5
Justin S Clark, Ming Cheng Yen: Method and apparatus for measuring the gaseous content of blood. Intermountain Health Care, Thorpe North & Western, January 3, 1984: US04424276 (34 worldwide citation)

Method and apparatus for determining the gaseous content of a diluent, such as determining the oxygen or carbon dioxide content of blood. A sample of the diluent whose gaseous content is to be measured is anaerobically pumped past a junction tee after being placed in a reservoir. A second diluent, n ...


6
Justin S Clark, Shuxing Sun: Total compliance method and apparatus for noninvasive arterial blood pressure measurement. Medical Physics, Thorpe North & Western, June 13, 1995: US05423322 (25 worldwide citation)

A system and method for automatically and noninvasively monitoring the blood pressure of a subject. The volume changes of an artery, such as a digital artery or the temporal artery, are detected by a photoplethysmograph. The volume changes are then used to determine the blood pressure and the blood ...


7
Ingvar E Sodal, Ronald R Bowman, Jerritt Hansell, Justin S Clark, Michael J Criddle: Calibration of a mass spectrometer. Masstron, Sheridan Ross & McIntosh, July 11, 1989: US04847493 (22 worldwide citation)

Apparatus and method are provided for calibrating a mass spectrometer. The calibration hardware includes a relatively small, relatively low pressurized tank for containing calibration gas. The calibration gas tank is preferably located inside the same housing that contains the ion source assembly an ...


8
Justin S Clark, Wm Dean Wallace: Method and apparatus for mixing gases. B Deon Criddle, December 13, 1977: US04062373 (13 worldwide citation)

A method of accurately mixing gases in desired proportions which comprises establishing the gases to be mixed at a uniform pressure; sequentially feeding the gases through a common restrictor for proportionate time periods to give the gas mix desired. The apparatus used includes a pressurizing gas r ...


9
William D Wallace, Christopher A Cutler, Justin S Clark, Frederick L Farr: Method and apparatus for equilibrating gas and liquid in a transportable vessel--syringe tonometer. H Ross Workman, Rick D Nydegger, J Winslow Young, March 17, 1981: US04256461 (12 worldwide citation)

Method and apparatus for gas-liquid equilibration (tonometry) in a transportable vessel. Specifically the method and device is concerned with tonometry of blood or buffer solution in a syringe. The compartment formed when a syringe plunger is partially inserted into a syringe barrel serves as a tono ...


10
Robert Gail Billings, Justin S Clark, Ke shieng Yang, Jon Neese, Allan L Kaminsky: System and method for in-vivo hematocrit measurement using impedance and pressure plethysmography. Microcor, Trask Britt & Rossa, October 3, 2000: US06128518 (9 worldwide citation)

The hematocrit of blood (i.e., the percentage of whole blood volume occupied by red blood cells) perfusing a finger is determined by stimulating the finger with two current frequencies, one relatively high (e.g., 10 MHZ) and the other relatively low (e.g., 100 KHz). Voltages induced in the finger in ...



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