UGO BASILE - I
TALY
Page 6
Series 58000 Instruction Manual (Rev.1)
2.4
Tail Cuffs
The rat and mouse tail cuffs, available in
different diameters (see 13.2-Available
Tail Cuffs) are of simple and straightfor-
ward design: they combine a sturdy short
plastic-tube, a rubber membrane and two
O-rings (see 13.4-Accessories and Con-
sumables, for spares) to seal the annular
pressure chamber.
The cuff is provided with a stretch of Tygon
tube featuring a pneumatic snap-in connec-
tor to couple it to the BP Recorder.
See also paragraph 12.2-Replacing a
Leaky Pressure Cuff Membrane for fitting
and replacing the membranes.
Figure 5 “Tail Cuff”
Incidentally, to free the animal from the tail-cuff without hurting it or damaging the rubber
membrane, requires the cuff to be
deflated
.
To depressurize, push the red key
DECOMP
: this causes the solenoid valve (
9
) to open,
releasing the pneumatic system, and the piston to speed back to its starting point.
2.5
Pulse Transducers
The pulse transducer, or pulse
pick-ups, available in different
diameters (see 13.1-Available
Pulse Pick-ups) are basically
piezoceramic rings.
They fit the tails of the animals
and are “stressed” by the
rhythmical expansion caused
by the systolic waves.
It is known that the stress
causes a piezoelectric ele-
ment to generate a propor-
tional voltage; in our pulse
transducers this voltage is led
to the amplifier by a miniature
coaxial cable.
Figure 6 “Pulse Transducer”
An expendable foam rubber ring reduces the mechanical shocks brought about by the
tail movements and thus minimizes any spurious signals.
RUBBER
MEMBRANE
O-RING
GROOVES
