Expert in Injury Biomechanics (head and spine), Medical Device Design, Structural Analysis, Patents
Expert passed the patent bar in 2002, and has testified in a number of patent disputes.
Expert has been working in biomechanics since his BS degree in mechanical engineering from MIT in 1980, and worked building instrumentation while an undergraduate as well. His initial position, between undergraduate and graduate school, was at the orthopedic biomechanics lab at the Mayo Clinic from 1980 to 1981, when he returned to graduate school. Expert has published on bone mechanics, cartilage mechanics, injury mechanics, and circulatory control over the space of the last 30 years. Currently, he is engaged in research on traumatic brain injury due to blast loading at the Johns Hopkins University Applied Physics Laboratory, where he is able to consult for non-government-related issues. Expert has given deposition testimony in over 20 cases regarding injury mechanics and the mechanical factors that are associated with injuries.
Dr. Harrign has taught biomechanics and mechanical design at Rice University and at three medical schools (to residents in preparation for professional exams).
Expert has a broad background in medical device analysis and consulting, including projects involving stents, endoscopic surgical tools, bone plates, pacemaker leads, catheters, total joint replacements, inhalers, vena cava filters, wound therapy devices, exercise equipment, in vitro fertilization equipment, and insulin pumps. Expert has published papers on failure processes in total joint replacements, testing methods for interfaces, and elastography. Since passing the patent bar in 2002, Expert has consulted on several patent actions involving medical devices as well as actions involving paintball guns, children's furniture, and other devices.
Expert is currently developing finite element computer models of the head, neck and thorax for the analysis of injury in military applications. In the past several years, Expert has developed computer models for mechanisms of mild traumatic brain injury, blast-related head trauma, and blast-resistant crew seating in military vehicles. In the past several years, Expert has also given expert witness testimony on injuries in automobile accidents and industrial accidents, including cases involving construction and offshore oil platforms.
Oil Rig Injury Cases: Testified in court and deposition on claims involving back and neck injuries during duties on oil rigs: Pulling slips, Nippling Down.Developed measurements and mathematical models for fluid pumping due to loose tolerances in orthopedic implants under load.Measured strains in a deep water repair device for 20 inch pipelines to assess the accuracy needed for proper sealing at depth.Developed an ultrasonic indentation gauge for measuring cartilage material stiffness in situ.Developed a measurement technique and measured strains within tissue expanders for reconstruction after mastectomy: Showed that the local curvature of the tissue expander was responsible for strain differences within the envelope of the expander.
Expert may consult nationally and internationally, and is also local to the following cities: Baltimore, Maryland - Frederick, Maryland - Gaithersburg, Maryland - Bowie, Maryland - Wilmington, Delaware - Lancaster, Pennsylvania - Alexandria, Virginia
|Year: 1999||Degree: MBA||Subject: Marketing and Entrepreneurship||Institution: University of Houston|
|Year: 1985||Degree: ScD||Subject: Mechanical Engineering||Institution: MIT|
|Year: 1980||Degree: BS||Subject: Mechanical Engineering||Institution: MIT|
|Years: 2009 to 2010||Employer: Johns Hopkins University Applied Physics Laboratory||Title: Senior Professional Staff||Department: National Security Technology Division||Responsibilities: He is leading computational analysis efforts in the biomechanics of injuries to the head, neck, spine, and thorax due to blast loading|
|Years: 2005 to 2009||Employer: Foster-Miller Inc||Title: Senior Engineer||Department: Structures and Transportation||Responsibilities: Engineering Program Development in Biomechanics; Blast Mitigation, Injury prevention, Structural Analysis, and Computational Fluid Dynamics.|
|Years: 2000 to 2005||Employer: Exponent Failure Analysis Associates||Title: Senior Engineer||Department: Biomechanics||Responsibilities: Expert witness on injury analysis, medical devices, and patent infringement. Contract R&D on medical devices.|
|Years: 1999 to 1999||Employer: Resmed||Title: Director||Department: Business Development||Responsibilities: Tasked with developing strategies to provide CPAP in stroke and heart failure.|
|Years: 1993 to 1999||Employer: UT Medical School at Houston||Title: Assistant Professor||Department: Orthopedics||Responsibilities: Develop research programs, supervise resident research, collaborate with medical faculty|
|Years: 1993 to 1999||Employer: Rice University||Title: Visiting Associate Professor||Department: Mechanical Engineering||Responsibilities: Develop and teach Biomechanics courses, teach engineering design, and teach applied mechanics|
|Years: 1993 to 1999||Employer: University of Houston||Title: Adjunct Professor||Department: Mechanical Engineering||Responsibilities: Supervise graduate students.|
|Years: 2008 to 2009||Agency: USAMRMC||Role: Reviewer||Description: Reviewed Proposals for funding in Traumatic Brain Injury|
|Associations / Societies|
|Orthopedic Research Society;
American Society of Mechanical Engineers.
|Licenses / Certifications|
Registered Patent Agent, USPTO.
|Publications and Patents Summary|
|Thirty-three (33) refereed research papers.|
|Expert Witness Experience|
|Approximately 20 depositions on injury, patent cases, and medical devices.
Six in-court appearances in injury, product liability, and patent cases.
Passed the Patent bar (as an agent), 2002.
|Training / Seminars|
|Biomechanics courses for orthopedic residents;
Biomechanics courses for undergraduate and graduate students at Rice University
|Long-term exposure (over 25 years) to orthopedic devices and technology.|
|Russian||Mid-intermediate level - can read scientific papers and web sites.|