Mindray BeneHeart D3, Operator'S Manual

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10-3
10.4.1 Optimizing Lead Placement for Resp
If you want to measure Resp and you are already measuring ECG, you may need to optimize the placement of the two
electrodes between which Resp will be measured. Repositioning ECG electrodes from standard positions results in
changes in the ECG waveform and may influence ST and arrhythmia interpretation.
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Cardiac activity that affects the Resp waveform is called cardiac overlay. It happens when the Resp electrodes pick
up impedance changes caused by the rhythmic blood flow. Correct electrodes placement can help to reduce
cardiac overlay. Avoid the liver area and the ventricles of the heart in the line between the respiratory electrodes.
This is particularly important for neonates.
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Some patients with restricted movement breathe mainly abdominally. In these cases, you may need to place the
left leg electrode on the left abdomen at the point of maximum abdominal expansion to optimize the respiratory
wave.
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In clinical applications, some patients (especially neonates) expand their chests laterally, causing a negative
intrathoracic pressure. In these cases, it is better to place the two respiration electrodes in the right midaxillary and
the left lateral chest areas at the patient’s maximum point of the breathing movement to optimize the respiratory
waveform.
NOTE
z
Respiration monitoring is not for use on the patients who are very active, as this will cause false alarms.
10.4.2 Changing Resp Wave Settings
In the [ Resp Setup ] menu, you can:
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Select [ Gain ] and then choose an appropriate setting. The bigger the gain is, the larger the wave amplitude is.
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Select [ Sweep ] and then choose an appropriate setting. The faster the wave sweeps, the wider the wave is.
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Select [ Lead ] to set lead for RESP monitoring.
In the [ Resp Setup ] menu, you can also change the [ Apnea Alarm Delay ] as desired.