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                            Library & Multimedia
 Ventricular fibrillation time constant for swine
NCJ Number
              305523

Author(s)
          Jiun-Yan Wu;
                        et al
Date Published

September 2008
Annotation
              This article details experiments on six pigs that were performed by delivering current from the X26 Taser dart at a distance from the heart to cause ventricular fibrillation (VF).
Abstract
              The strength–duration curve for cardiac excitation can be modeled by a parallel resistor–capacitor circuit that has a time constant. The X26 Taser is an electromuscular incapacitation device (EMD), which generates about 50 kV and delivers a pulse train of about 15–19 pulses s−1 with a pulse duration of about 150 μs and peak current about 2 A. Similarly, a continuous 60 Hz alternating current of the amplitude required to cause VF was delivered from the same distance. The average current and duration of the current pulse were estimated in both sets of experiments. The strength–duration equation was solved to yield an average time constant of 2.87 ms ± 1.90 (SD). Results obtained may help in the development of safety standards for future electromuscular incapacitation devices (EMDs) without requiring additional animal tests. (Publisher abstract provided)
      
  
          Additional Details
Grant Number(s)
        2004-IJ-CX-K036


  
  
        
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        NIJ-Sponsored


  
  
        
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        Model electric current through the human from less-lethal electromuscular device
    
  
  
Date Published: September 1, 2008
    
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