Abiomed ImpellaCP Manuel D'utilisation page 10

4. Press DONE to confirm suggested adjustment. LV waveform
adjustments occur in increments of 1 mmHg from -60 to 60 mmHg.
Recommended: Do not adjust to a value other than the suggested
value.
Figure 1.16 Adjustment Tool
Figure 1.17 Placement Screen Post Adjustment
Note: It is not atypical to see a LV systolic value higher than the Ao
systolic
ENTERING CARDIAC OUTPUT
The cardiac output and cardiac power output metrics are for informational
purposes only. Do not use for diagnostic purposes or patient monitoring.
Independently verify all parameters displayed with a cleared or approved
diagnostic device.
Enter Cardiac output into the Automated Impella Controller from a
reference device, such as a Swan-Ganz catheter. Enter a new cardiac
output every 8 hours. After 7 hours from entry, a white notification will
trigger to enter a new cardiac output.
To enter the Cardiac Output:
1.
Press MENU soft button.
2. Select "Enter Cardiac Output" using the rotary knob or the up/
down arrow soft buttons.
3.
Enter the total Cardiac Output, which can be any value from 0.0
to 10.0 L/min in increments of 0.1 L/min.
4. Press the DONE soft button or the rotary knob to complete.
8
Figure 1.18 Enter Cardiac Output
A Cardiac Output Confirmation will be displayed if a total Cardiac Output is
entered that is less than or equal to the current Impella Flow (Figure 1.19).
The CONFIRM soft button will use the current Impella Flow as the total
Cardiac Output entry and the Native Cardiac Output will not be trended.
The BACK soft button will go back to the Enter Cardiac Output screen. The
CANCEL soft button will exit the workflow.
Figure 1.19 Cardiac Output Confirmation
CARDIAC OUTPUT, NATIVE CARDIAC OUTPUT & CARDIAC
POWER OUTPUT CALCULATIONS
Once a cardiac output is entered, the Automated Impella Controller can
calculate an initial cardiac power output and native cardiac output using
the following equations:
CPO = (CO x MAP) / 451
NCO = CO - Impella Flow
The Native Cardiac Output estimate is derived from a relationship between
native function and aortic pulse pressure (PP). This relationship is linear
and scaled by a calibration factor, ß which may vary between patients
and as an individual patient's condition changes. This relationships can be
shown by the following equation:
NCO= ß x PP
Once the calibration factor is obtained, the Automated Impella Controller
will continue to calculate the cardiac output, native cardiac output, and
cardiac power output for the next 8 hours using the above equations.
If cardiac power output values are below or equal to 0.6, the value will
display as yellow.
Note: Do not use values as a clinical diagnostic tool, this is for
informational purposes only.
User Manual