This is most likely to occur when a piercer is being
used. If the tip of the piercer is pushed too deeply
into the cement and allowed to remain in situ, then
the cement behind the tip is liable to solidify and
trap the probe. If this happens, the load on the probe
may be excessive preventing normal resonance because
of the mass of cement now attached to the probe. If
this occurs the generator will automatically enter a
‘stuck in cement’ mode and display
CEMENT RELEASE MODE
Energise the handset, but do not apply any pressure on
the handset for the first 2 seconds of use ( this
gives the channel a better chance to find a resonant
feature ). The generator will perform repeated scans
of the handset, sounding a double beep as it does so.
Whilst this occurs, gently remove the probe from the
cement. When free from cement the channel mode will
return to normal operation. If the display shows
WAIT - REDUCE PRESSURE
just wait for 4 seconds and the module will reset
automatically. Again, energise handset but apply
little pressure on the handset for the first two
seconds of use, then slowly remove probe.
This procedure may lead to an
message on the LCD. Allow the channel to cool for
several minutes. When the channel resets attempt
removal again. This process may take a couple of
attempts, depending how deep the probe is stuck in the
This can occur if the probe comes into contact with
metal and becomes scratched, causing a stress riser to
appear. When this happens, fragments of the probe are
at risk of coming off during operation.
Solution: Change the probe and
replace at the earliest opportunity.
If the handset/probe suffers from intermittent power
and a clicking noise, caused by the tripping of
relays, coming from the generator, then the cable
connecting the handset to the generator will have
Solution: Change the cable
associated with the defective system.
i. The probe will appear to be working inefficiently
if it is pressed too hard into the cement. The
generator will alert the surgeon by sounding an alarm.
Solution: Ease of pressure to enable
the probe to work at maximum efficiency always press
the tip gently into the cement and use gentle force:-
allow the ultrasound to do the work. Avoid excessive
force at all times.
ii. Lack of power during cutting can be due to the
interface between the probe and the handset being
Solution: Tighten the connection
using the 9mm spanner provided. The power level can
also be diminished if this interface is not clean and
has been damaged due to the presence of particles.
Should this occur, it is necessary to re surface the
interface, which can be done by Orthofix Srl.
Should the stud attached to the probe become loose, it
must be returned to Orthofix Srl for repair.
iii. Loss of power when cutting cement can also be due
to the crystals in the handset overheating. The
crystals will heat up naturally during normal use, but
if excessive force is used for prolonged periods of
time this heating will affect performance. As the
handset warms up its resonant frequency will drop. If
the handset becomes too warm the frequency will drop
out of the handsets’ working range and the channel
will shut down. The LCD will display
FREQUENCY TOO LOW
Solution: Use another handset and
allow the hot handset to cool down. The channel will
reset automatically when the handset is cool.