Fluke Biomedical medSim 300B - Manual (Page 139)

Cardiac Output
Overview
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Overview
The Cardiac Output Option electronically simulates the dynamic temperature changes in
the patient's blood during thermal dilution cardiac output measurement.
Thermal dilution cardiac output measurements are based upon the heat exchange between
the patient's blood and a known volume of chilled saline injected into the heart. Cardiac
output is expressed in liters per minute (L/min) and ranges between 3 L/min and 7 L/min
for normal adults.
Current cardiac output measurement devices have additional technical capabilities to
ensure that the most accurate readings are attained. These capabilities include the ability
to average a series of readings to eliminate variations because of artifacts, as well as
reject readings because of clinician technique or the patient's underlying cardiovascular
disease.
Note
Cardiac output measurement devices using different techniques (such as
Fick dye injection, Doppler ultrasonography and bioimpedance) are
neither addressed nor intended for use with the Fluke Biomedical
medSim 300B Patient Simulator.
Specifications
The Fluke Biomedical medSim 300B Cardiac Output Option is designed to test the
features and specifications of the cardiac output patient monitors identified above.
The cardiac output simulation is based upon the electrical characteristics of the American
Edwards Catheter 93A-131-7 F which has a 7 F-catheter diameter and uses an injectate
volume of ten cubic centimeters (10 cc). Accordingly, cardiac output values are
programmed at fixed readings of 3 L/min, 5 L/min and 7 L/min; 3 defective readings; and
3 series of readings with variations.
Note
While the Cardiac Output Option is based upon the American Edwards
Catheter, it is compatible with comparable adult cardiac output
measurement catheters, such as Gould/SpectraMed and Abbott (Sorenson).
Specifications for the Cardiac Output Option follow:
Simulated Catheter Type:
American Edwards Catheter 93A-131-7 F
Computational Constant: 0.542
Catheter Size: 7 F
Injectate Volume: 10 cc
Baseline Temperature: 36 °C, 37 °C, and 38 °C
Injectate Temperature: 2 °C
Waveforms: 3 L/min, 5 L/min, and 7 L/min
Interrupted injectate
Left ventricular shunt
Slow injectate