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Expert in Injury Biomechanics (head and spine), Medical Device Design, Structural Analysis, Patents
Available for your Consulting and Expert Witness Needs
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Summary of Expertise:
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Listed with other top experts in: |
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Expert has over 30 years of experience in structural analysis, including experience porting finite element codes to specialized architectures, developing special-purpose mesh generation tools, and assessing the correspondence of structural models with experimental measurements. Expert has developed de novo programs to simulate bone remodeling around orthopedic devices, and has broad experience in strucural nonlinearities such as contact, plasticity, NiTinol alloys, and fracture mechanics. Expert has used structural analyses in expert witness testimony and has reviewed the testimony of opposing experts. Based on a doctorate in mechanical engineering from MIT, years of university teaching experience in mechanics and biomechanics, and on over 30 refereed journal articles, Expert has the appropriate background for a range of engagements in mechanics and structural analysis. Expert passed the patent bar in 2002, and has testified in a number of patent disputes.
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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).
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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.
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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.
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Show Secondary and Basic Areas of Expertise | Localities:
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;
and Alexandria, Virginia.
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| Year |
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Degree |
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Subject |
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Institution |
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Honors |
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1999
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MBA
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Marketing and Entrepreneurship
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University of Houston
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1985
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ScD
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Mechanical Engineering
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MIT
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1980
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BS
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Mechanical Engineering
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MIT
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Pi Tau Sigma, Eta Kappa Nu
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| Years |
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Employer |
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Department |
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Title |
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Responsibilities |
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2009 to 2010
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Johns Hopkins University Applied Physics Laboratory
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National Security Technology Division
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Senior Professional Staff
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He is leading computational analysis efforts in the biomechanics of injuries to the head, neck, spine, and thorax due to blast loading
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2005 to 2009
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Foster-Miller Inc
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Structures and Transportation
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Senior Engineer
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Engineering Program Development in Biomechanics; Blast Mitigation, Injury prevention, Structural Analysis, and Computational Fluid Dynamics.
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2000 to 2005
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Exponent Failure Analysis Associates
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Biomechanics
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Senior Engineer
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Expert witness on injury analysis, medical devices, and patent infringement. Contract R&D on medical devices.
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1999 to 1999
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Resmed
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Business Development
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Director
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Tasked with developing strategies to provide CPAP in stroke and heart failure.
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1993 to 1999
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UT Medical School at Houston
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Orthopedics
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Assistant Professor
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Develop research programs, supervise resident research, collaborate with medical faculty
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1993 to 1999
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Rice University
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Mechanical Engineering
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Visiting Associate Professor
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Develop and teach Biomechanics courses, teach engineering design, and teach applied mechanics
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1993 to 1999
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University of Houston
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Mechanical Engineering
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Adjunct Professor
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Supervise graduate students.
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Associations/Societies
Orthopedic Research Society;
American Society of Mechanical Engineers.
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Licenses/Certifications
PE Texas;
Registered Patent Agent, USPTO.
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| Publications: |
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Publications and Patents Summary
Thirty-three (33) refereed research papers.
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Selected Publications and Publishers
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- Journal of Materials Science
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- Comments on Theoretical Biology
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- Annals of Biomedical Engineering
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- Ultrasound in Medicine and Biology
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- ASME International Mechanical Engineering Congress and Exposition
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| Government Experience: |
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| Years |
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Agency |
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Role |
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Description |
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2008 to 2009
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USAMRMC
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Reviewer
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Reviewed Proposals for funding in Traumatic Brain Injury
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| Selected Consulting Examples: |
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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.
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Developed measurements and mathematical models for fluid pumping due to loose tolerances in orthopedic implants under load.
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Measured strains in a deep water repair device for 20 inch pipelines to assess the accuracy needed for proper sealing at depth.
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Developed an ultrasonic indentation gauge for measuring cartilage material stiffness in situ.
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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.
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Recent Client Requests:
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Expert for consulting on design of centrifugal pump for medical ventilator.
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Click the green button above to contact
Expert for a free initial screening call regarding your expert consulting needs.
Expert is available for consulting to corporate, legal and government clients.
Remember, your initial screening call to speak with
Expert is free.
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Expert Witness Experience Summary:
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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.
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Click the green button above to contact
Expert for a free initial screening call regarding expert testimony,
litigation consulting and support, forensic services, or any related expert witness services.
A few litigation needs include product liability, personal injury, economic loss, intellectual property
(patent, trademark, trade secret, copyright), and insurance matters. Remember, your initial screening
call to speak with
Expert is free.
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| Language Skills: |
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| Foreign Language |
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Description |
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Russian
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Mid-intermediate level - can read scientific papers and web sites.
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Long-term exposure (over 25 years) to orthopedic devices and technology.
Click the green button above to contact
Expert for a free initial screening call regarding your marketing research, industry research, and company
research needs. For research needs involving multiple experts or secondary research,
a Research Director can be assigned to coordinate the work into a custom report for you as a potentially quicker
and more cost effective alternative to doing this work yourself or hiring a boutique consultancy.
Remember, your initial screening call to speak with
Expert is free.
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| Additional Skills and Services: |
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Training/Seminars
Biomechanics courses for orthopedic residents;
Biomechanics courses for undergraduate and graduate students at Rice University
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Education
