User manual
5
Doppler Technique
Doppler detects blood flow in arteries and veins. Doppler blood pressure is a manual
technique using a Doppler flow detector to listen to electronically produced blood
flow sounds with the sensor placed proximal to a cuff of suitable size. Use the
sphygmomanometer to inflate the cuff until the artery is occluded and the blood
flow stops. Increase the pressure 20 to 30 mmHG above the occlusion pressure and
then decrease the pressure by slowly deflating the cuff using the thumb valve on the
pump. When blood flow audio resumes, read the systolic pressure on the gauge as
the needle passes this point. For accuracy record five measurements, eliminate the
highest and lowest measurements and take the mean of the remaining. The mean is
the indirect systolic blood pressure.
The Doppler technique depends on successful acquisition of the Doppler blood flow
signal. Body temperature, vasoconstrictive drugs, a bent limb, too much hair and
inadequate lubrication of the area contribute to difficulties in acquiring an adequate
signal.
Description of Controls and Indicators (Refer to Figures 1 and 2)
Indicator Lights (NOTE: LED locations are only visible when illuminated.)
LOW BATTERY (Status) Light: The LOW BATTERY LED illuminates YELLOW when the
unit requires a charge (NOTE: You may use the Vet-Dop2 at normal
performance for about an hour after light first illuminates).
CHARGE Light: The charge light will turn YELLOW or AMBER during charging. The light
will turn GREEN when the battery is fully charged. (NOTE: Battery requires up to
4.5 hours to become fully charged.
POWER Light: A red LED over the power button will illuminate when the unit is on.
(NOTE: Press and immediately release the power button to turn on; press and
hold button down to turn off)