User's Manual

52 Operator’s Manual ZM-940PA/941PA
Position 3
In this position, the respiration waveform is optimum, but the ECG lead is unusual.
R or RA F or LL
Right midaxillary at the
horizontal level of V4
Fifth intercostal space on the
left midaxillary line, V6
Position 4
Inthisposition,therespirationmeasurementisinuencedbytheimpedancevariationofthe
abdomen, so the cardiac pulse wave included in the respiration wave is reduced. Note that the
waveform is inverted in phase compared with the chest movement (the waveform goes down during
inspiration).ItisdifculttomeasuretheECGatthesametime.
R or RA F or LL
Lowest rib on the right
anterior axillary line
Lowest rib on the left anterior
axillary line