1000DF00330 Issue 4
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Occlusion Pressure Limits
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 deducting this volume from the volume infused.
Time to alarm following occlusion is achieved in less than 30 minutes at rates of 1 ml/h and higher by the appropriate selection of occlusion
levels.
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
typical
typical
typical
Bolus Volume without back off
Bolus Volume with back off
Time to alarm - 5.0 ml/h
Occlusion Level
hr
:min:sec
Occlusion Level
hr
:min:sec
Occlusion Level
Occlusion Level
ml
ml
typical
