Mindray iPM-9800, Руководство оператора

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9-1
9
Monitoring Respiration (Resp)
9.1 Introduction
Impedance respiration is measured across the thorax. When the patient is breathing, the
volume of air changes in the lungs, resulting in impedance changes between the electrodes.
Respiration rate (RR) is calculated from these impedance changes, and a respiration
waveform appears on the patient monitor screen.
9.2 Safety
WARNING
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When monitoring the patient’s respiration, do not use ESU-proof ECG cables.
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If you do not set the detection level for the respiration correctly in manual
detection mode, it may not be possible for the monitor to detect apnea. If you set
the detection level too low, the monitor is more likely to detect cardiac activity, and
to falsely interpret cardiac activity as respiratory activity in the case of apnea.
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The respiration measurement does not recognize obstructive and mixed apneas. It
only indicates an alarm when a preset time had elapsed since the last detected
breath. Therefore, it cannot be used for diagnostic purpose.
9.3 Placing Resp Electrodes
As the skin is a poor conductor of electricity, preparing the skin is necessary for a good
Respiration signal. You can refer to the ECG section for how to prepare the skin.
As the respiration measurement adopts the standard ECG electrode placement, you can use
different ECG cables (3-lead, 5-lead or 12-lead). Since the respiration signal is measured
between two ECG electrodes, if a standard ECG electrode placement is applied, the two
electrodes should be RA and LA of ECG Lead I, or RA and LL of ECG Lead II.
NOTE
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To optimize the respiration waveform, place the RA and LA electrodes
horizontally when monitoring respiration with ECG Lead I; place the RA and LL
electrodes diagonally when monitoring respiration with ECG Lead II.