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Table Of Contents
12 Monitoring Cardiac Output
196
CCO/CCI settings can be changed in the Setup CCO menu. To access this menu,
• select any of the continuously measured hemodynamic numerics (CCO, CCI.) on the screen.
Entering the HemoCalc Window
From the procedure window, select the pop-up key Hemo Calc to open the Hemo Calculations
window.
Measuring C. O. Using the PiCCO Method
The PiCCO method combines transpulmonary thermodilution and pulse contour analysis on the
blood pressure waveform. A fluid with a known volume and temperature is injected into the right
atrium through a CVP catheter. The injectate bolus mixes with the blood in the heart and the change in
blood temperature is measured with a thermistor at the distal end of an arterial catheter placed in one
of the bigger systemic arteries, for example, the femoral or the axillary artery.
The PiCCO Method requires a pressure measurement made using either the M1006B Pressure
module, or a M3001A/M3002A MMS, or a measurement extension module M3015A, M3014A, or
M3012A. (A pressure from an external device may not be used.) You will also need a conventional
central venous (CVP) line and an arterial catheter from PULSION Medical Systems. You must use the
approved catheters and puncture locations.
Measuring Continuous Cardiac Output
Every time C.O. is measured with the PiCCO method, the monitor uses this C.O. value and the result
of the pulse contour analysis to calculate a patient-specific calibration factor. The monitor uses this
value to compute CCO and the other continuous hemodynamic parameters. CCO values are calculated
on a beat-to-beat basis and then averaged over a 12-second time frame. The calculated values are
displayed as numerics on the monitor screen.
Measuring Systemic Vascular Resistance
The monitor uses CCO, an arterial pressure, and CVP to calculate a continuous SVR value. If a
continuously measured CVP value is not available, the monitor uses a preset, static CVP value to
calculate the SVR (you will see the INOP message
SVR SET CVP USED). If the BSA is available, the
monitor uses the CCI to calculate the SVRI. A CCO or CCI from an external device can also be used
for the SVR/SVRI calculation.
SVR/SVRI settings can be changed in the corresponding setup menu. To enter the menu, select
Main
Setup
then Measurements followed by SVR or SVRI.
To display a
SVR/SVRI numeric on the Screen, select any numeric, then select Change Numeric and
select
SVR or SVRI from the list of available numerics.
Measuring Pulse Pressure Variation
Note: Pulse Pressure Variation can be calculated in two different ways on this monitor - in conjunction
with CCO or directly from the pressure measurement. Refer to the Invasive Pressure chapter for
information on PPV from pressure. Only one PPV can be active at a time.