getemed VitaGuard VG2100, Руководство по эксплуатации

Страница: 55 / 124

Preparing for heart rate and apnea monitoring 55
CAUTION When
Amplitude: poor
is displayed, the values for the
monitored heart rate and apnea may be imprecise.
Amplitude ............................. Meaning
poor
.......................................... the signal is not or only sporadically
detected
medium
................................... the signal is detected, but interference,
e.g. due to movement, can cause false
alarms
good
......................................... a clear signal is detected
A correct
Heart rate
is detected when the heart LED flashes synchro-
nously with the patient’s heartbeat. When the signal amplitude is
good
or
medium,
there should be no deterioration in
the detected heart rate when the patient moves
normally.
Observe the LED with the lungs symbol and the respi-
ration bar on the VitaGuard® display. Carefully change
the positions of the red and yellow electrodes. When-
ever possible, try to obtain the largest possible deflections in the
respiration bar. Also, the respiration bar must move and the LED flash
synchronously with the respiration.
6.5 Checking the
basal impedance
The basal impedance is displayed in View 1, the respiration display,
and the display
Info
\
Measurements: HR & Resp.
The basal impedance
is the sum of all impedances in the measuring circuit:
skin and tissue impedance between the red and the yellow electrode
impedance of the electrode-skin interface
impedance of the electrodes themselves and the patient cable