Your method of testing the occlusion for the Baxter Colleague does not appear to relate to anything recomended by Baxter in their service manual.
The recomended method is to test the occlusion at:
Minimum at 20ml/hr - limits 0.29 to 4.79 PSI
Minimum at 100 ml/hr - limits 1.52 to 7.83 PSI
Moderate at 100 ml/hr - limits 4.24 to 12.83 PSI
Maximum at 100 ml/hr - limits 6.96 to 17.84 PSI
As you can see the limits are quite wide.
Might be a good idea to check your test methods against the manufactures recomedations in the latest service manual.
We have 455 of these pumps.
No liquid therapy at our trust, even thinking about it is not allowed.
Hope the above is of use.
