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 (363 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 (35 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
Justin S Clark: Cyclic injection method for continuous measurements of pulmonary parameters. Intermountain Health Care, Thorpe North & Western, December 14, 1982: US04363327 (8 worldwide citation)

A non-invasive cyclic injection method for determining pulmonary blood flow, the ventilation-perfusion distribution and functional residual capacity, which consists of the non-invasive cyclical introduction of soluble and insoluble inert gases into the airstream of the human patient, each period of ...



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