User's Manual

Respiration
12-9
Figure 12-2: Infant electrode placement
Adjusting Respiration Sensitivity
Two input sensitivities for respiration monitoring are available. You can set them
based on the patient’s respiratory effort; shallow or normal. Use the shallow mode
if the monitor has difficulty counting the respiratory rate and/or the waveform is
difficult to read. Selecting the SHALLOW mode also lowers the detection
sensitivity nearer to the low amplitude waveform of infants.
The factory default for sensitivity is NORMAL in the adult mode, and SHALLOW in
the infant mode.
Using the Cardiovascular Artifact Filter
Respiration is monitored based on impedance changes which occur with the
expansion and contraction of the chest. However, the physical action of the heart
pumping blood and the flow of blood through the vasculature also creates
changes in impedance known as cardiovascular artifact (CVA).
In the absence of respiration, for example, during episodes of apnea, it is possible
for a waveform to appear in the respiration zone which represents CVA rather
than true respirations. In such cases, the rate of the CVA would be the same as
the heart rate.
LA
RA
LL
Alternate Method:
Position RA and LA electrodes
at the 2nd intercostal space,
midclavicular line.
Position LL below the
diaphragm, preferably below
the umbilicus.
RA
LA
LL
Maximum Impedance Change:
Position RA and LA electrodes at the
nipple level, midaxillary line.
Position LL below the diaphragm,
preferably below the umbilicus.
To adjust respiration monitoring
sensitivity:
1 Touch RESP.
2 Select SHALLOW or NORMAL.
To enable the CVA filter:
1 Touch RESP.
2 Select CVA FILTER ON.
To disable the CVA filter:
1 Touch RESP.
2 Select CVA FILTER OFF.