NCS SHOULDER PACEMAKER SPM Series, Руководство пользователя

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SHOULDER PACEMAKER
TM
- User Manual 04-06EN
19
APPENDIX A
The following tables set out some relevant quantities calculated using a simplified stimulation circuit analysis for settable stimulation
reference parameters. The following quantities are considered.
Name Description
Units of
measurement
V
PEAK
Peak voltage at the stimulation terminals, corresponding to the initial instant of stimulus
obtained when the SWITCH is closed
Volt
V
EFF_STIM
Effective stimulus voltage (relative to the period during which the SWITCH is closed) Volt
I
EFF_CYCLE
Effective current on a complete cycle (period between the initial peaks of two consecutive
stimuli, equal to the inverse of the FSTIM stimulation frequency F
STIM
)
milliAmpere
E
STIM
Stimulus energy (relative to the period during which the SWITCH is closed) milliJoule
Table 4: Electrical quantities calculated at the stimulation output terminals
The tables include different assessments for the stimulation parameters and possible load resistance values Z
LOAD
.
Parameter Selected values
V
REF
[V] 25, 50, 75, 100, 125, 150 (maximum value)
F
STIM
[Hz] 35 (typical value)
T
STIM
[μs] 100 (typical value)
Z
LOAD
[Ω] 500 (extreme precautionary value), 2000 (typical value), 5000
Table 5: Stimulation parameters and load resistances considered in the example tables
Z
LOAD
=500 Ω
T
STIM
=100 μs
F
STIM
=35 Hz
V
REF
25 50 75 100 125 150
V
PEAK
[V] -24.43 -48.85 -73.28 -97.71 -122.13 -146.56
V
EFF_STIM
[V] -10.06 -20.11 -30.17 -40.23 -50.29 -60.34
I
EFF_CYCLE
[mA] 1.19 2.38 3.58 4.77 5.96 7.15
E
STIM
[mJ] 0.02 0.08 0.18 0.32 0.51 0.73
Table 6: Electrical levels at limit loading Z
LOAD
= 500 Ω, T
STIM
= 100 μs and F
STIM
= 35 Hz
Z
LOAD
=2000 Ω
T
STIM
=100 μs
F
STIM
=35 Hz
V
REF
25 50 75 100 125 150
V
PEAK
[V] -24.67 -49.33 -74.00 -98.66 -123.33 -147.99
V
EFF_STIM
[V] -17.85 -35.70 -53.55 -71.40 -89.25 -107.10
I
EFF_CYCLE
[mA] 0.53 1.06 1.59 2.12 2.65 3.18
E
STIM
[mJ] 0.02 0.06 0.14 0.25 0.40 0.57
Table 7: Electrical levels at limit loading Z
LOAD
= 2000 Ω, T
STIM
= 100 μs and F
STIM
= 35 Hz
Z
LOAD
=5000 Ω
T
STIM
=100 μs
F
STIM
=35 Hz
V
REF
25 50 75 100 125 150
V
PEAK
[V] -24.82 -49.64 -74.46 -99.27 -124.09 -148.91
V
EFF_STIM
[V] -21.58 -43.16 -64.74 -86.32 -107.89 -129.47
I
EFF_CYCLE
[mA] 0.26 0.51 0.77 1.02 1.28 1.54
E
STIM
[mJ] 0.01 0.04 0.08 0.15 0.23 0.34
Table 8 : Electrical levels at limit loading Z
LOAD
= 5000 Ω, T
STIM
= 100 μs and F
STIM
= 35 Hz