Huntleigh DOPPLEX MD2 Manual Del Usuario página 4

O O P P E E R R A A T T I I N N G G I I N N S S T T R R U U C C T T I I O O N N S S
V V A A S S C C U U L L A A R R
The Multi Dopplex II/Super Dopplex II
Dopplers ( ( M M D D 2 2 / / S S D D 2 2 ) ) will select vascular
mode when a vascular probe is connected
to the control unit.
In this mode, bi-directional blood flow rate
and direction are indicated on bar graphs (4
levels in each direction) and blood flow is
audible in the loudspeaker. Probe frequency
is displayed together with the bar graphs.
C C l l i i n n i i c c a a l l U U s s e e
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.
W W a a v v e e f f o o r r m m R R e e c c o o r r d d i i n n g g ( ( M M D D 2 2 o o n n l l y y ) )
Separated waveform outputs are provided in
analogue and digital formats.
Analogue signals are provided for
connection to a single channel chart
recorder giving a combined bi-directional
waveform, or to a dual channel recorder for
separate forward and reverse flow
waveforms. (Pin-out details on request).
Digital signals are provided via the RS232
port for printing separate waveforms on a
D D o o p p p p l l e e x x P P r r i i n n t t a a I I I I or for communicating with
D D o o p p p p l l e e x x R R e e p p o o r r t t e e r r software package.
C C a a l l F F u u n n c c t t i i o o n n
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 bi-directional
pulses as shown below:
Cal Pulses
O O P P E E R R A A T T I I N N G G I I N N S S T T R R U U C C T T I I O O N N S S
V V A A S S C C U U L L A A R R
G G a a i i n n C C o o n n t t r r o o l l
To cope with the wide variety of signals
detectable using your M M D D 2 2 / / S S D D 2 2 , a gain
control allows you to optimise the bar-graph
display and increase the height of the
waveforms.
Using the Mode button on the M M D D 2 2 (Gain
button for S S D D 2 2 ), gain can be set to x1, x2,
x4, x8.
C C o o n n n n e e c c t t i i o o n n t t o o P P r r i i n n t t a a I I I I ( ( M M D D 2 2 O O n n l l y y ) )
Hard copy printing is automatically selected
when the plug of the interface buffer box is
inserted into the RS232 socket on the top
panel of the M M D D 2 2 . Printing is then initiated by
using the S S t t a a r r t t / / S S t t o o p p button.
C C o o n n n n e e c c t t i i o o n n t t o o S S o o f f t t w w a a r r e e ( ( M M D D 2 2 O O n n l l y y ) )
The M M D D 2 2 can be connected to the Reporter
Software Package, via the RS232 interface.
Dopplex Reporter software package is
available as an accessory. Communicating
is then initiated by using the S S t t a a r r t t / / S S t t o o p p
button.
P P r r o o b b e e s s
Five probes are available for vascular
examinations:
V V P P 4 4 H H S S
4MHz ±1% for deep
lying vessels
V V P P 5 5 H H S S
5MHz ±1% for deep
lying vessels and
oedematous limbs
V V P P 8 8 H H S S
8MHz ±1% for peripheral
vessels
V V P P 1 1 0 0 H H S S 10MHz ±1% for
specialist superficial
applications.
E E Z Z 8 8 8MHZ ±1% "Widebeam"
for peripheral vessels.
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