GE CARESCAPE, Руководство пользователя

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Gas exchange
Injury, infection
Anxiety
Fever
Work of breathing
Thermogenic effect
% above predicted energy expenditure
Gas exchange practicalities
A steady state condition should be present to ensure that the gas exchange
measurement is equivalent to the tissue gas exchange. In addition, different
physiological factors may affect the stability of the patient: a change in the breathing
pattern, lung volume, dead space or circulatory status induces an abrupt change
in the inspiratory and expiratory gas concentrations. These factors also determine
how fast the measurement stabilizes. The patient should be motionless and with
consistent respiratory rates and volumes.
Although gas exchange can be measured over a short period of time, a period of at
least 20 to 30 minutes is preferable. By prolonging the measurement period, more
valid information on the average gas exchange can be obtained.
Several variables can contribute to inaccurate information. To ensure correct
measurement, keep these practical considerations in mind:
●
Sampling line.
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To ensure correct module initialization, always connect the sampling line and
the D-fend to the module before turning on the monitor or connecting the
module to a monitor that is already on.
￭
Use a correct sampling line length. Sampling lines require specific lengths and
diameters for accurate reporting of gas and flow. GE recommends using only a
2-m (7-ft) sampling line.
●
Free tubing with no obstructions.
￭
Check that there is no water (active humidity, secretions) or kinked tubing in a
line.
●
Measurement calibration and accuracy.
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To ensure measurement accuracy, check the accuracy of airway gas
measurement once a month.
￭
Make sure you are using correct calibration gas.
￭
Ensure that the calibration gas and regulator are functioning properly before
calibration. Do not wash or disinfect calibration gas sampling lines.
346 CARESCAPE Modular Monitors 2062971-001