42
The
FD2
will automatically select
vascular mode when a vascular
probe is connected to the control unit.
In this mode, blood flow is audible in
the loudspeaker. Probe frequency is
displayed.
Clinical
Use
Apply a liberal amount of gel on the
site to be examined. Place the probe
at 45° to the skin surface over the
vessel to be examined.
Adjust the position of the probe to
obtain the loudest audio signal. High
pitched pulsatile sounds are emitted
from arteries while veins emit a non-
pulsatile sound similar to a rushing
wind.
For best results, keep the probe as
still as possible once the optimum
position has been found. Adjust the
audio volume as required.
Probes
Five probes are available for vascular
examinations:
VP4
HS
4MHz ±1% for deep lying
vessels
VP5
HS
5MHz ±1% for deep lying
vessels and edematous
limbs
VP8
HS
8MHz ±1% for peripheral
vessels
VP10
HS
10MHz ±1% for specialist
superficial applications.
EZ8
8MHz ±1% “Widebeam”
for peripheral vessels.
OOPPEERRAATTIINNGG
IINNSSTTRRUUCCTTIIOONNSS
VVAASSCCUULLAARR
((FFDD22
OONNLLYY))
OOPPEERRAATTIINNGG
IINNSSTTRRUUCCTTIIOONNSS
OOBBSSTTEETTRRIICCSS
IMPORTANT!!
READ
THIS
SECTION
BEFORE
UUSING
YYOUUR
Fetall
Doppllex.
Although the
Fetal
Dopplex
will
calculate the rate as early in
pregnancy as fetal pulse signals of
good quality can be elicited,
generally from about the 9th or 10th
week after the last menstrual
period, fetal heart rhythm may not
be sufficiently stable to permit
accurate rate computation until well
after the first trimester.
Similarly, no attempt to apply non-
stress test (NST) interpretation
criteria should be made until after
the 25th week of gestation, when
neurological development is usually
sufficient to obtain a reactive pattern.
To be considered reactive, two
accelerations at least 15 bpm in
amplitude and at least 15 seconds
in duration should occur in a 10
minute period.
If the fetus is found to be non-
reactive using the
Fetal
Dopplex
hand-held sampling technique,
consideration should be given to
repeating the test using a
conventional fetal monitor.
The
Fetal
Dopplex
is suitable for
intermittent auscultation during the
intrapartum period, but not
recommended for long term
intrapartum monitoring, where
Cardiotocographic equipment,
including contractions measurement
capability should be employed.
EENNGGLLIISSHH
((UUSSAA))
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