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Vmed
Doppler Stethoscope
Ultrascope ultrasonic Doppler
Stethoscope
 The
Ultrascope Doppler stethoscope is a hand-held, 9V battery operated
ultrasonic Doppler that has been used in human and animal applications for
over 30 years. Models are available for fetal and blood flow detection both
in humans and animals. The Doppler model selected depends on the size and
depth of the target under investigation. Larger animals may require the
fetal detector to pick up fetal heart sounds, where these sounds may be
heard in smaller mammals and invertebrates using a blood flow detector. See
below for common applications or contact Vmed to discuss your intended use.
The Ultrascope is as easy to use as a stethoscope, but superior do to the
relatively small sensor tip which can be as small as 1/4" in diameter
depending on the model selected. Doppler ultrasound has many applications
in veterinary and human medicine. See "Clinical Papers" on this site for
veterinary applications. Ultrasound gel, KY jelly, water or alcohol must be
applied to the area of investigation and thick hair should be clipped to
allow ultrasound energy to be transmitted through the skin. The amount of
pressure, the angle of the probe and the Doppler frequency effect the
sensitivity and signal quality.
Three frequencies are offered, each optimized for the best signal in
various applications. Quite a bit of overlap exists in frequency
sensitivity to various targets depending on the size of the patient.
Double click each photo below to enlarge
Double click the link below to download and save these
Acrobat.pdf files on your computer:
Ultrascope
Flyer.pdf
Model 8 (8
MHz.): Peripheral vascular applications in humans where sensitivity to the
superficial vessels is desired including digital and penal blood
flow detection. Mammal, reptile and rodent cardio-vascular sounds and
small mammal peripheral vascular sounds. The Model 8 may be used to measure
systolic blood pressure when used in conjunction with a cuff and
sphygmomanometer but requires one hand to hold the probe, another to steady
the limb and an assistant to pump up the gauge. Blood pressure measurements
are much easier to take using the Vet-Dop since only one person is required.
Model 5 (5
MHz.): Used in human applications where sensitivity to the deeper vessels
such as the femoral and abdominal arteries is needed. Most dog and cat
heart, early gestation fetal and deep vessel blood flow signals on larger
mammals.
Model 2
(2.25 MHz.): Human fetal detection as early as 11 weeks, but sensitivity is
best for later gestational age. Advanced gestation fetal sounds and best
heart sounds on larger mammals.
The best ultrasonic Doppler signal is heard when heavy hair
is clipped and ample coupling gel is used. Some vets report that an
adequate signal is obtained through hair if the limb is soaked in water
first. Coupling gel may not be needed for amphibians or reptiles because
of their moist skin.
Key Benefits and Uses
- Super-sensitive ultrasound
- Light weight pocket Doppler design
- Stethoscope Headphones for best sound quality.
- Detect fetal heart sounds
- Confirm arterial and venous blood flow
- Evaluate discrete cardiac sounds
Ultrasonic Doppler
Blood Flow Detection in Small Exotic Animal Medicine
(1)
Doppler ultrasonic echocardiological examination is a useful means for
evaluating the cardiovascular function in even the smallest reptiles and
many, if not most, postmetamorphosed amphibians. This technique permits the
resolution of the discrete sounds produced by atrial and ventricular
myocardial contraction, atrioventricular myocardial contraction,
atrioventricular and aortic valvular blood flow, intravenal caval filling
and aortic ejection, and often the flow of blood within smaller individual
arteries and veins. All of these sounds can be detected without the need
for invasive procedures and, thus, pose no inherent risk to the patient.
Other uses for the Doppler ultrasonic detector includes the evaluation and
monitoring of intraoviductal embryos of fetuses or ovoviviparous reptiles
and the viability and embryonic development of incubating reptilian eggs
well beyond the time when conventional candling fails to yield satisfactory
results.
(1) Fredric L. Frye, BSc, DVM, MSc, CBio, FIBiol,
Seminars in Avian and Exotic Pet Medicine, Vol.3, No.3 (July), 1994: pp
133-139
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