LSUHSC Shreveport
Radiology Department
Proc 13.17
Condiiton #5 The injection is
proceeding
perfectly normal,
but during the
injection, with no
programmed
decrease in flow
rate, the Pressure
Graph sharply
drops to baseline,
but no error
messages appear
on the screen.
Note: If a
multilevel
injection is
programmed,
and the flow rate
is programmed
to decrease, then
the pressurewill
also drop at that
time.
If the injector is still armed
and injecting at a constant
flow rate, but the Pressure
Graph drops sharply to
baseline: Stop the injector
immediately and
investigate. The pressure in
the syringe has sharply
dropped and through the
piston is moving forward
and should be developing
pressure. Possible causes:
* The Low Pressure
Connector
Tubing, extension set, or
catheter
has burst or disconnected
from the
fluid path (fluid is
running on the floor).
* The syringe may have
failed. Fluid is being
forced around the syringe
plunger instead of
out the end of the syringe
(fluid is running on
the floor).
If the injector is still
injecting (arm light solid
and manual knob on the
back of the head turning),
consider aborting the
injection. There is a high
probability that fluid is
running on the floor.
Condition #6 The pressure
buildup to the
expected peak is
taking longer
than typical
,
even thought he
injector is
injecting
normally.
Due to operator error, the
syringe may contain a large
amount of air (example:
half air, half fluid). It is
easier to compress air, than
to push fluid through a CT
disposable system, so the
injector is initially
developing less pressure as
it compresses the air.
Stop the injector
immediately and
investigate.
Check the fluid path for
air.
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