Abstract
Tasers are battery powered electrical devices used by law enforcement personnel to temporarily incapacitate a suspect. This study is a portion of a larger study to determine the probability of a Taser (X26 and M26) causing ventricular fibrillation (VF) in humans. We determined the distance between a Taser dart and the ventricle (dart-to-heart distance) necessary to trigger VF in an in-vivo porcine model, using 10 anesthetized pigs. All experiments were approved by the appropriate IUCUC and adhere to all applicable laws and standards of the NIH and USDA as well as the policies of the APS. To more accurately represent the dart-to-heart distances found in a human, we reflected the skin, subcutaneous fat and muscle over the sternum and placed a thoracic dart into the third intercostal space over the right ventricle. Current flowed to a second dart 15 to 54 cm away on the abdomen. We determined that the distance between the darts makes no significant difference in the current. We directly measured the dart-to-heart distance and confirmed it post mortem. The dart-to-heart distance that causes VF is 17 mm ±6.48 (SD) for the first VF event and 13.7 mm ±6.79 (SD) for the average of the successive VF events. We will combine these data with echocardiographic human anatomic data, police-provided dart landing distribution data, and a finite element method (FEM) model of current density in the human torso to yield a probability of a Taser causing VF in a human.
Keywords
- electromuscular incapacitating device
- Taser
- ventricular fibrillation
- echocardiography
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References
Amnesty International, http://news.amnesty.org/index/ENGAMR510392006
Laur D, Excited Delirium and its Correlation to Sudden and Unexpected Death Proximal to Restraint. (Canada: Victoria Police Department), 2004, retrived from http://www.taser.com/facts/medical_info.htm.
McDaniel WC, Stratbucker RA, Nerheim M, and Brewer JE, “Cardiac safety of neuromuscular incapacitating defensive devices,” PACE, Suppl. 1, vol. 28, pp. S284–287, 2005
Geddes LA and Baker LE, Principles of Applied Biomedical Instrumentation, 3rd ed., New York: John Wiley & Sons, 1989, pp. 458–461
Geddes LA, “Accuracy limitations of chronaxie values,” IEEE Trans. Biomed. Eng., vol. 51, no. 1, pp. 176–181, 2004.
Jones M and Geddes LA, “Strength duration curves for cardiac pacemaking and ventricular fibrilllation,” Cardiovasc. Res. Center Bull., vol. 15, pp 101–112, 1977
Webster JG, “Electromuscular incapacitating devices,” IFMBE Proc., 9, 2005.
Sun H, Wu J-Y, Abdallah R, and Webster JG, “Electromuscular incapacitating device safety,” IFMBE Proc., 11(1), 2005.
Roy OZ, Scott JR, and Park GC, “60-Hz ventricular fibrillation and pump failure thresholds versus electrode,” IEEE Trans. Biomed. Eng., vol. 23, pp. 45–48, 1976.
Duck FA, Physical Properties of Tissue: A Comprehensive Reference Book, San Diego: Academic Press, 1990.
“Taser cartridge specification-15′, 21′ and 25′ XP” TASER International. Inc, 2006. retrived from http://www.taser.com/law/download/specs.htm
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© 2007 International Federation for Medical and Biological Engineering
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Webster, J.G. et al. (2007). Can Tasers® directly cause ventricular fibrillation?. In: Magjarevic, R., Nagel, J.H. (eds) World Congress on Medical Physics and Biomedical Engineering 2006. IFMBE Proceedings, vol 14. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-36841-0_870
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DOI: https://doi.org/10.1007/978-3-540-36841-0_870
Publisher Name: Springer, Berlin, Heidelberg
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