Table 1.
Predictive algorithms and the parameters for which they were developed.
| Predictor | Amplitude (V) |
Pulse width (µs) |
Frequency (Hz) |
Configuration | Electrode impedance (Ω) |
Axon diameter (µm) |
|---|---|---|---|---|---|---|
| DF-Peterson | N/Aa | 20 – 10,000 | Single pulseb | N/Aa | N/Aa | 4.0 – 20.0 |
| VTA-Chaturvedi | ≤ 10 | 60, 90, 120, 150, 180, 210, 450 | 130c | Monopolar, Bipolar, Tripolar, Quadripolar | Low (0–749), Medium (750–1250), High (1251+) | 2.0, 5.7, 7.3, 8.7, 10.0 |
| VTA-Madler | 1–10 | 90 | 130c | Monopolar | Low (741), Medium (1003), High (1244) | 5.7 |
| VTA-Astrom | 1–5 (step 0.5) | 30, 60, 90, 120 | Single pulsec | Monopolar | 1000 | 2.0 – 7.5 (step 0.5)d |
a
Predictor was developed for a peak extracellular potential along an axon.
b
Square, monophasic pulse.
c
Representative of the stimulation waveform output from a Medtronic pulse generator.
d
Axon diameter to internodal distance relationship is different than the other predictors.