PFA-100 System – Instruction Manual (US) – Version 1.0.1
612
12 Diagnostics and troubleshooting
12.5.1 Maximum Test Time Exceeded
The following table contains information about the circumstances in which the message MAXIMUM TEST TIME
EXCEEDED occurs and how to proceed afterwards.
Description Causes Solutions/Comments Result Interpretation
The sample did not achieve
closure of the aperture within
the maximum time for a test
(> 300seconds, not including
the incubation period).
• Sample with abnormal platelet
function resulting in non-closure
(NC) of the aperture
• A possible vacuum leak in the
analyzer causing a NC
• Defective PFA test cartridge
• If a NC is obtained with a normal
donor control or the result does not
agree with the patient’s clinical
history, a possible vacuum leak may
be suspected. Perform a Self Test
via the Maintenance menu without
loading the cleaning pad. This will
test if debris on the O-Ring is the
cause of the vacuum leak. If self
test passes, a defective PFA test
cartridge may have caused the
vacuum leak. If the vacuum leak
test fails, perform the Manual O-
Ring Maintenance Procedure via
the Maintenance menu and rerun
the self test. Cleaning or replacing
the O-Ring may correct the vacuum
leak. If the problem persists, contact
the Siemens Healthcare
Diagnostics Service.
• Rerun the sample with new PFA
test cartridge to verify the test
result. If daily Self Test ok, then
most likely this is an abnormal
sample.
Report as CT >300sec, abnormal
platelet function as confirmed by retest.
Table 12-1 Maximum Test Time Exceeded
To Next Page
Loading...
