Stryker RF MultiGen 0406-900-000, Инструкция по эксплуатации

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EN 0406-900-702 Rev-E
Appendix B - Maximum Frequency and
Maximum Stimulation Width Graphs
NOTES:
• The stimulation type of energy is biphasic square pulses. The width
values shown are for each phase (see figures 45 and 46).
• For a fixed amplitude value, increasing the width value will pass more
energy output into the patient per pulse. In general, more energy output
has the effect of recruiting more nerve fibers within the cannula tip
proximity and provoking a stronger response. Conversely, a reduction in
the width value will reduce the patient response.
• The duty cycle of the stimulation energy is limited to 25% for safety
reasons. MAX Width = 25% · 1/frequency
Figure 45 Maximum Frequency vs. Stimulation Width Graph
Figure 46 Maximum Stimulation Width vs. Frequency Graph
Appendix C - Relative Lesion Sizes and
Shapes (parallel bipolar only)
NOTES:
• Due to the variability in distance that can arise when placing the
electrodes, it is important to remember that the distance between the
electrodes directly affects the relative shape and size of the resulting
lesion.
• Lesion sizes can vary significantly, and depend on local tissue and
thermal conductivity, proximity to ‘heat sinks’ such as blood vessels, and
to other thermal insulation such as bone. See the lesion sizes measured
in chicken tissue in figures 47, 48, 49, and 50. Lesions were created at
80 °C for 90 seconds using a 5 mm active tip 20-gauge electrode. The
measurements indicated below are approximate.
2 mm
Figure 47 Contiguous Lesion 4.2 mm x 5.8 mm (width x length)
6 mm
Figure 48 Contiguous Lesion 7.8 mm x 9.6 mm (width x length)
2 mm
6 mm