category | nominal specifications |
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EMI (Immunity) | Meets EN |
| and 10 V/m at 26 MHz to 1 GHz). |
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Aircraft: Method | Meets |
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| Defibrillator |
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| nominal specifications |
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Waveform Parameters | Biphasic truncated exponential. Waveform parameters are automatically adjusted as a | ||||||||||||||||||||||||||||
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| function of patient defibrillation impedance. In the diagram at left, A is the duration of phase | ||||
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| 1 and B is the duration of phase 2 of the waveform, C is the interphase delay, Vp is the peak | ||||
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| voltage, and Vf the final voltage. |
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| The HeartStart FR2+ delivers shocks to load impedances from 25 to 180 ohms. | ||||
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| The duration of each phase of the waveform is dynamically adjusted based on | ||||
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| delivered charge, in order to compensate for patient impedance variations, as | ||||
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| shown below: |
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| adult defibrillation |
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| load | phase 1 | phase 2 | delivered | |
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| resistance (ohms) duration (ms) | duration (ms) | energy (J) | ||
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| 25 | 2.8 | 2.8 | 140 |
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| 50 | 4.09 | 4.09 | 150 |
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| 100 | 9.0 | 6.0 | 157 |
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| 125 | 12.0 | 8.0 | 161 |
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| 150 | 12.0 | 8.0 | 157 |
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| pediatric defibrillation |
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| (using M3870A FR2 infant/child | ||||
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| load | phase 1 | phase 2 | delivered | |
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| resistance (ohms) duration (ms) | duration (ms) | energy (J) | ||
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| 25 | 4.1 | 4.1 | 35 |
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| 50 | 5.8 | 3.8 | 48 |
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| 100 | 7.2 | 4.8 | 55 |
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| 125 | 7.2 | 4.8 | 54 |
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| 150 | 9.0 | 6.0 | 55 |
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| NOTE: The values given are nominal. Because of the effect of the M3870A FR2 |
infant/child pads’ attenuation circuitry on the defibrillator’s impedance compensation feature, the actual phase durations for a given load resistance on the table above could be those of an adjacent row.