A pneumatic tube system used for delivering specimens should be inspected to ensure that it has no or minimal effects on accuracy of the subsequent analyses.
Routine times for inspections:
(1) initial acceptance after installation
(2) after a major modification to the system
(3) periodically throughout the year
Additional inspections may be done if operational problems occur:
(1) unexplained hemolysis of blood specimens
(2) lost or delayed specimens
(3) sudden increase in damaged tubes
(4) troubleshooting unexpected laboratory results
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