CareFusion Alaris 8015 User Manual page 183

Syringe Module (Continued)
Pressure Sensing Disc Installed
(Continued)
NOTES:
The optimal occlusion alarm limit setting achieves a balance

between the risk of false alarms and timely response to
occlusions. To avoid interruptions in therapy, the limit should be
set at a value higher than the expected actual "working" pressure,
which will allow normal events such as patient movement and
titrations to occur without alarms.
The "working" pressure presented to a pump by the IV cannula
depends on several factors: combined rate of all infusions
running into a single vascular access point, resistance of the
fluid path, elevation differential, and vascular pressure dynamics.
Resistance to flow is determined by the catheter's length and inner
diameter, and the viscosity of the fluid. Kinking and clotting might
also elevate the resistance to flow over time.
The Syringe module allows both fixed and customized approaches
to pressure limits to be configured. Each Profile can be
programmed with its own maximum pressure value, supporting a
fixed limit approach. Customized limits can be set either manually,
by reading the current pressure following stabilization and adding
a margin, or by use of the Auto Pressure feature which, on
activation, sets a margin of 30 mmHg for initial pressures under
100 mmHg or 30% of the initial pressure at higher initial values.
The margin must be larger when variations in flow, resistance,
and vascular pressure are anticipated. When pumping through
high resistance access devices such as central line catheters, the
Auto Pressure margin might be inadequate. With these devices,
ten minutes or more might be required to allow the pressure to
stabilize following flow rate changes, as required for the use of
Auto Pressure. Therefore, caution should be used when using
Auto Pressure for life sustaining fluids, to prevent unexpected
interruptions of infusion due to occlusion alarms.
If Auto Pressure is selected and current pressure is:

• 100 mmHg or less – system adds 30 mmHg to current pressure
to create a new alarm limit
• greater than 100 mmHg – system adds 30% to current pressure
Pump and Syringe Modules Section
Alaris System User Manual – with v9.33 Model 8015
Select Pressure Limit (Continued)
FU
RATE (mL/h)
CHANNEL
SELECT
PAUSE
CHANNEL
OFF
RESTART
General Programming
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