laerdal SimMom, Directions For Use Manual, Page: 17 / 50

Intr
oduction
Setup
Softwar
e
Maintenance
Spar
e Par
ts
Specifications
16 17
Software
Perf
orming
Sim
ulations
– Early decelerations slider sets amplitude of decelerations
occurring simultaneously with each contraction.
– Late decelerations slider sets amplitude of decelerations
occurring after each contraction.
– Variable decelerations slider sets amplitude of decelerations
proceeding and following each contraction.
–
Sinusoid
box sets fetal heart rate waveform resembling sinusoidal
wave.
Note: The fetal heart pattern parameters are mutually
exclusive. When one is set to a certain value, the others
automatically remain at 0.
Baseline variability parameters include LTV (long term variability)
gain, LTV frequency, and STV (short term variability) gain. STV gain
measures the beat-to-beat change in the fetal heart rate. LTV gain
measures changes in the fetal heart rate over a longer period of time.
LTV frequency is the frequency of long term variability measured in
hertz.
Uterine activity
parameters include baseline, contraction interval,
contraction duration, and height.
Once the desired parameters have been set, click < Apply > to load
them into the simulation.
Creating and Saving Preset Parameters for Fetal Heart and
Uterine Activity
To create preset parameters for fetal heart and uterine activity:
1. In the Fetal Simulation Setup window open the Edit fetal monitor
preset
window by clicking either the <
New
> button under the
Select preset tab or the < Save as preset > button under the
Custom tab.
2. Choose a name for the preset, and enter it into the Pattern name
dialogue box.
3. Select one of the four pattern types from the Pattern type pull
down menu.
Note: The pattern types correspond to the menus under the
Select preset
tab.
4. Set preset parameters by sliding toggles and/or entering numbers
into dialogue boxes.
Note: For greater detail on creating a composite fetal heart
rate pattern, proceed to the ‘Creating A Composite Fetal
Heart Rate Pattern’ section.
Note: When parameters are changed in a section marked
‘Only for reference not saved in preset,’ the changes will appear
in the preview window but will not be saved in the preset.
5. Save preset by clicking the <
OK
> button.
The saved preset should now appear in the Select preset tab
underneath the menu corresponding to its pattern type.
To edit a saved preset, click on it in the
Select preset
tab, and press
the < Edit > button.
To erase a saved preset, click on it in the Select preset tab, and press
the < Remove > button.
Creating A Composite Fetal Heart Rate Pattern
A composite fetal heart rate pattern consists of multiple sub patterns,
each of which has its own parameters. By varying the duration of
the sub pattern, users can infuse greater degrees of randomness and
variability into the simulation.
The user can create a composite fetal heart rate pattern, or select one
from the list of presets. Preset composite fetal heart rate patterns
include
episodic accelerations , prolonged decelerations , variable
decelerations, and occasional accelerations .
To create a composite fetal heart rate pattern:
1. In the Fetal Simulation Setup window open the Edit fetal monitor
preset window, and select the composite Fetal heart rate pattern
from the Pattern type pull down menu.