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Patient Monitor User Manual
Chapter 10 Monitoring RESP
10.1 Overview
The monitor measures respiration from the amount of thoracic impedance between two ECG
electrodes. The change of impedance between the two electrodes, (due to the thoracic movement),
produces a respiratory waveform on the screen.
10.2 RESP Safety Information
1
If you do not set the Hold High and Hold Low for the respiration correctly in manual
detection mode, it may not be possible for the monitor to detect apnea. If you set the
Hold High and Hold Low 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.
2
Respiration measurements cannot detect all underexposure sudden events, nor can
they distinguish between central, obstructive and mixed respiratory asphyxial events.
It only prompts alarm in a predetermined time if the last breath is detected and the
next breath is not detected, so it cannot be used for diagnostic purposes.
3
If operating under conditions according to the EMC Standard EN 60601-1-2 (Radiated
Immunity 3 V/m), field strengths above 3 V/m may cause erroneous measurements at
various frequencies. Therefore it is recommended to avoid the use of electrically
radiating equipment in close proximity to the respiration measurement unit.
4
Cardiogenic artifact in impedance respiration monitoring may make it difficult to detect
breaths or may otherwise be counted as breaths. In some instances, the breath rate
may also correspond to the heart rate making it difficult to determine if the signal is
due to breathing or the cardiac cycle. Do not rely on RESP monitoring as the sole
method for detecting cessation of breathing. Follow hospital guidelines and best
clinical practices for apnea detection including monitoring additional parameters that
indicate the patient's oxygenation status, such as etCO
5
For the diagnosis of apnea, especially in premature infants and infants, the safety and
effectiveness of respiration measurements have not been validated.
6
To monitor the respiration, only non-ESU-proof accessories can be used. This is
because the internal impedance of the ESU-proof accessories required to be used for
electrosurgical operation is too large.
7
Some implantable pacemakers can adjust their triggering frequency according to the
"minute ventilation rate." Impedance respiration measurements may cause these
pacemakers to react incorrectly. To prevent this, turn off the respiration measurement.
8
In manual detection mode, after changing the gain of the respiration wave, be sure to
check the setting of hold high and hold low.
WARNING
- 115 -
Monitoring RESP
and SpO
.
2
2
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