BDDF00001 Issue 5
49/56
Alaris™ Syringe Pumps
Occlusion Pressure Limits
Without a Pressure Extension Set fitted, G40020B - Standard disposable extension set
The following graphs show the typical values for time to alarm and bolus volume that can be expected in the event of an occlusion when
the BD Plastipak 50 ml syringe is selected with a G40020B standard extension set .
Time to alarm - 1 .0 ml/h
Time to alarm - 5 .0 ml/h
hr
:min:sec
—
typical
hr
:min:sec
—
typical
Occlusion Level
Occlusion Level
Bolus Volume without back off
Bolus Volume with back off
ml
—
typical
ml
—
typical
Occlusion Level
Occlusion Level
Tests at low alarm levels may alarm immediately - the force at these levels is commonly less than the friction in the syringe (with no
additional fluid pressure) . The result is that the pressure relating to the low forces will be less than the nominal quoted occlusion
pressure .
Bolus volume following occlusion will be minimised by the back off feature if enabled . The back off will reduce the line pressure by
removing the volume stored in the occluded line and deduct this volume from the volume infused . Back off will terminate if the pressure
reaches the level recorded by the Pump when the infusion was last started, or a maximum back off volume has been withdrawn from the
extension set . It will also terminate if the volume infused reaches 0 .0ml, or a VTBI reaches the value at which it was set .