10
Oper
ation
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.
Waveform Recording -
The D900 can be connected to a chart recorder by using a suitable lead that
plugs into the Waveform socket. (For more information on the chart recorder,
refer to the manufacturer’s handbook).
Cal Function
The baseline and sensitivity of the chart recorder can be set up using the Cal
function. This generates a zero velocity baseline and a sequence of pulses as
shown below:
Cal Pulse
Two levels of calibration pulses are provided. While Cal is active, calibration
tones synchronised to the calibration pulses are superimposed on the audio
signal.
If the button is pressed and held, then the calibration sequence is repeated.
When the calibration sequence is complete, normal operation is resumed.
3.2 After
Use
1.
Press and release the On/Off button. If you forget to switch the unit
off, it will automatically shut-off after 5 minutes.
2.
Refer to the cleaning section before storing or using the unit on
another
patient.
3.
Store unit together with probe and accessories in the soft carry case
provided.
