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
Summary of Contents for SHOULDER PACEMAKER SPM Series
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