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Joseph Allen Orr

Phone: 801-585-5444
Phone: 435-640-8103
Office: 801-585-5444

Joseph Allen Orr

Research Associate Professor
Adjunct Associate Professor, Bioengineering
B.S.E.E. Arizona State University 1985
M.S. Bioengineering University of Utah 1987
Master of Engineering Management Brigham Young University 1988
PhD Bioengineering University of Utah 1991


Critical care monitoring, Anesthesia gas delivery systems, Patient simulation, Physiologic monitoring, Medical device development

Selected Publications

Allen SG, Brewer L, Gillis ES, Pace NL, Sakata DJ, Orr JA, A Turbine-Driven Ventilator Improves Adherence to Advanced Cardiac Life Support Guidelines During a Cardiopulmonary Resuscitation Simulation. Respir Care 2017 Sep;62(9):1166-1170

Yu L, Ting CK, Hill BE, Orr JA, Brewer LM, Johnson KB, Egan TD, Westenskow DR, Using the Entropy of Tracheal Sounds to Detect Apnea during Sedation in Healthy Nonobese Volunteers. Anesthesiology 2013 Jun;118(6):1341-1349

Brewer LM, Orr JA, Sherman MR, Fulcher EH, Markewitz BA, Measurement of functional residual capacity by modified multiple breath nitrogen washout for spontaneously breathing and mechanically ventilated patients. Br J Anaesth 2011 Nov;107(5):796-805

Görges M, Westenskow DR, Kück K, Orr JA, A tool predicting future mean arterial blood pressure values improves the titration of vasoactive drugs. J Clin Monit Comput 2010 Jun;24(3):223-35

Brewer LM, Orr JA, Pace NL, Anatomic dead space cannot be predicted by body weight. Respir Care 2008 Jul;53(7):885-91

Brewer LM, Haryadi DG, Orr JA, Measurement of functional residual capacity of the lung by partial CO2 rebreathing method during acute lung injury in animals. Respir Care 2007 Nov;52(11):1480-9

Sakata DJ, Gopalakrishnan NA, Orr JA, White JL, Westenskow DR, Rapid recovery from sevoflurane and desflurane with hypercapnia and hyperventilation. Anesth Analg 2007 Jul;105(1):79-82

Gopalakrishnan NA, Sakata DJ, Orr JA, McJames S, Westenskow DR, Hypercapnia shortens emergence time from inhaled anesthesia in pigs. Anesth Analg 2007 Apr;104(4):815-21

Sakata DJ, Gopalakrishnan NA, Orr JA, White JL, Westenskow DR, Hypercapnic hyperventilation shortens emergence time from isoflurane anesthesia. Anesth Analg 2007 Mar;104(3):587-91

Haryadi DG, Orr JA, Kuck K, McJames S, Westenskow DR, Partial CO2 rebreathing indirect Fick technique for non-invasive measurement of cardiac output. J Clin Monit Comput 2000;16(5-6):361-74

Bailey PL, McJames SW, Cluff ML, Wells DT, Orr JA, Westenskow DR, Kern SE, Evaluation in volunteers of the VIA V-ABG automated bedside blood gas, chemistry, and hematocrit monitor. J Clin Monit Comput 1998 Jul;14(5):339-46

Kern SE, Johnson JO, Orr JA, Westenskow DR, Clinical analysis of the flexor hallucis brevis as an alternative site for monitoring neuromuscular block from mivacurium. J Clin Anesth 1997 Aug;9(5):383-7

Strong K, Westenskow DR, Fine PG, Orr JA, A preliminary laboratory investigation of air embolus detection and grading using an artificial neural network. Int J Clin Monit Comput 1997;14(2):103-7

Kern SE, Johnson JO, Westenskow DR, Orr JA, A comparison of dynamic and isometric force sensors for train-of-four measurement using submaximal stimulation current. J Clin Monit 1995 Jan;11(1):18-22

Kern SE, Johnson JO, Westenskow DR, Orr JA, An effectiveness study of a new piezoelectric sensor for train-of-four measurement. Anesth Analg 1994 May;78(5):978-82

Orr JA, Westenskow DR, A breathing circuit alarm system based on neural networks. J Clin Monit 1994 Mar;10(2):101-9

Krishna SA, Orr JA, Westenskow DR, Classification of red blood cell images using a neural network. Proc Annu Symp Comput Appl Med Care 1994;:975

Westenskow DR, Orr JA, Simon FH, Bender HJ, Frankenberger H, Intelligent alarms reduce anesthesiologist's response time to critical faults. Anesthesiology 1992 Dec;77(6):1074-9

Farrell RM, Orr JA, Kück K, Westenskow DR, Differential features for a neural network based anesthesia alarm system. Biomed Sci Instrum 1992;28:99-104

Orr JA, Westenskow DR, Bauer A, A prototype gas exchange monitor for exercise stress testing aboard NASA Space Station. J Appl Physiol (1985) 1989 Jan;66(1):492-7