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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 CARDIAC OUTPUT
1.
Press the MENU soft button.
2.
Select the "Enter Cardiac Output" using the rotary knob.
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.
12
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. 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.
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
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