Getting to Know Your Doppler
The pocket size Doppler veterinary blood flow detector is a simple device enabling a wide
range of easy and reliable diagnosis of blood flow in the vessels, auscultation on very small
animals, and blood pressure measurement.
Recharging Jack
Probe Jack
Power Indicator
On / Off Power
Membrane
Blood Pressure Measurement Instructions
1. Determine where you would like to obtain the blood pressure and gently position the
patient so you can easily access the artery. Common locations to obtain blood pressure
on pets is on the forelimb, using the ulnar artery above the metacarpal pad; the hind limb,
using either the saphenous artery above the metatarsal pad or the dorsal pedal artery on
the front of the metatarsals; or the coccygeal artery located on the underside of the tail.
2. Place appropriately sized cuff above the vessel to be used. Once the cuff is placed,
ensure that it is in good condition. Attach the sphygmomanometer and gently inflate and
deflate the cuff to verify that it holds pressure.
3. Shave the hair over the vessel or wet the hair with alcohol. Ensuring the probe has good
contact with the skin will provide the best possible sound. Excess hair can block or mute
the signal from the probe, making it difficult to hear.
4. Apply a small amount of ultrasound gel to the Doppler probe. The gel conducts the
sound from the artery so the probe can receive it. Too much gel will make the probe
slippery and difficult to handle; too little gel will not conduct the sound properly. Place the
probe with gel on it over the vessel. Don’t press too hard as excessive pressure can occlude
the vessel. A swishing sound should be heard when the probe is placed properly. Move the
probe slightly over the vessel until you achieve the best sound.
5. Occlude the vessel by slowly inflating the cuff with the sphygmomanometer until you
can no longer hear pulses. Inflate the cuff a little bit more after the pulse sounds are no
longer heard. Slowly deflate the cuff while watching the dial on the sphygmomanometer.
When the sound of the pulses returns, the number the needle on the sphygmomanometer’s
dial is pointing to is the systolic blood pressure.
6. As the user continues to deflate the cuff, a diastolic pressure can be obtained by noting
the position of the needle on the dial when a change in the Doppler’s tonality is heard.
Obtaining a diastolic pressure reading requires a lot of experience and good operating
conditions.
7. Ideally, the user will obtain 3-5 blood pressure readings to verify accuracy. Always
deflate the sphygmomanometer completely and wait about 15-30 seconds in between read-
ings to allow for normal blood flow through the limb. Failure to do this can lead to falsely
high readings. Never leave the cuff inflated when not actively obtaining a blood pressure
reading!
Operating Instructions
During transport, the probe is disconnected from the main unit. The push-pull connectors
of the probe are connected on the side of the Doppler. The pair of connectors are symmet-
rical and, generally, can be connected in any order. The self-latching mechanism of the
connectors protects against accidental disconnect of the probe. To disconnect, always pull
by the metal part of the connector, never pull on the cord!
The JorVet BP Doppler is easy to use and was designed with simplicity in mind. It has
minimum controls – volume up/down and power on/off.
To turn on the device, press the ON button. To turn the device off, press the OFF button.
To increase the volume, press the UP arrow button. To decrease the volume, press the
DOWN arrow button.
The continuous green LED light indicates that the unit is powered on. A pulsating green
LED light indicates that the batteries should be recharged. When the unit hasn’t been
used for 4 minutes or the battery is low, the unit will power off automatically. To charge
the battery, plug the AC adaptor into the mini-jack on the Doppler unit and plug the AC
adaptor into an appropriate electrical outlet. The LED light should shine RED while the
battery charges. During charging, the red light becomes weaker and will disappear when
the battery is fully charged. A full battery charge time is 15 hours.
The mini-jack socket is made to accept the charging cable as well as the headphones. The
headphones allow the user to listen to the pulses privately. This is convenient if the Dop-
pler is being used in a noisy room or if the sounds from the Doppler frighten the patient.
Blood Pressure Measurement Instructions
Specifications
