Ppp085 Impedance Educational

Human impedance variability and defibrillator test protocol Why 50 Ω loads are not enough to test modern defibrillators

Defibrillators: life saving ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Current vs. energy ,[object Object],[object Object],[object Object],[object Object]

Transthoracic impedance ,[object Object],[object Object],[object Object]

Transthoracic impedance (cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Transthoracic impedance (cont.) ,[object Object],[object Object],[object Object],“ Humans exhibit a wide range of transthoracic impedance, and defibrillators compensate for this range of impedance in different ways.” -- McDaniel, Garret, Burke and Arzbaecher 2

Schematic and Formula E H = I 2 x R H x Time (Watt Seconds or Joules) Defibrillator

How defibrillators account for human impedance variability ,[object Object],[object Object]

How defibrillators account for human impedance variability (cont.) ,[object Object],[object Object],[object Object]

Biphasic waveforms ,[object Object],[object Object],Rectilinear Biphasic (ZOLL) Smart Biphasic (Philips) Pulsed Biphasic (Schiller)

Clinical impedance examples ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Impedance and defibrillation outcomes ,[object Object],[object Object],[object Object],[object Object]

Load testing: accounting for impedance variability ,[object Object],[object Object],[object Object]

Load testing: accounting for impedance variability (cont.) ,[object Object],[object Object]

When to test with other loads ,[object Object],[object Object],[object Object]

The 7010 solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Impulse 7010 Selectable Load Accessory

References ,[object Object],[object Object],[object Object],[object Object]

References (cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Questions? For more information on the Impulse 7010 solution for variable impedance testing, contact Fluke Biomedical today. Fluke Biomedical Toll free: (800) 850-4608 Direct: (440) 248-9300 Fax: (440) 349-2307 [email_address]

Ppp085 Impedance Educational

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