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What This Guide Helps With
Troubleshoots reported probe, pipettor, or aspiration-related faults by checking specimen setup, accessories, obstruction, positioning, and external conditions before escalation.
Step-by-Step Troubleshooting
1. Protect Specimens and Stop Unreliable Operation
Do not allow patient specimens to continue through a process that is producing repeated aspiration or sample-handling faults. Coordinate with laboratory staff to preserve specimens and use an approved alternate workflow.
If the reported function does not apply to the installed BACTEC FX configuration, confirm the exact device or accessory generating the error before proceeding.
Expected outcome: Patient specimens are protected and the actual source of the reported error is identified.
2. Confirm the Exact Fault
Record the exact displayed message and determine when it occurs. Identify whether the fault affects one specimen, one position, one accessory, or all attempts.
Do not infer that a probe or pipettor is mechanically defective based only on the wording of an error.
Expected outcome: The fault is reproducible and its scope is understood.
3. Inspect the Specimen or Container
Check the affected bottle or sample container for external damage, improper closure, unusual material, incorrect fill appearance, label interference, or other visible conditions that could interfere with handling.
Do not manipulate a patient specimen beyond approved laboratory procedures.
Expected outcome: The specimen container appears appropriate and intact. If the issue follows one abnormal container, remove it from the suspect process and follow laboratory procedure.
4. Verify Positioning and Loading
Confirm the specimen or applicable accessory is fully seated and correctly positioned. Check for tilted containers, obstruction, misalignment, or an improperly installed carrier.
Expected outcome: Loading is normal and unobstructed. If proper positioning resolves the error, repeat the test using an approved method and stop after verification.
5. Inspect Accessible Sample-Handling Areas
Inspect externally accessible areas around the reported sample-handling path for dried material, debris, misplaced caps, broken container fragments, or another obstruction.
Do not reach into protected motion areas or bypass interlocks.
Expected outcome: Accessible areas are clear. If removing an external obstruction using the approved method restores operation, complete functional verification.
6. Compare With a Known-Good Specimen or Test Item
When laboratory procedure permits, determine whether the problem follows the original specimen or occurs with another suitable known-good test item.
Expected outcome: The issue is isolated to the specimen or remains with the analyzer. If the original specimen is the cause, follow laboratory policy and stop equipment troubleshooting.
7. Check Associated Accessories
Inspect applicable racks, carriers, adapters, tubing, or other externally replaceable accessories associated with the reported function. Compare with known-good accessories when available.
Expected outcome: Accessories are intact and correctly installed. If replacing a damaged external accessory resolves the fault, verify repeated normal operation.
8. Verify No Related System Faults Are Present
Check for concurrent readiness, fluid, waste, door, temperature, or communication messages that may be causing a secondary sample-handling error.
Expected outcome: No unresolved external system condition is contributing to the fault. Correct any identified external prerequisite before retesting.
9. Perform Controlled Functional Verification
After correcting an external cause, perform an approved functional check. Observe operation without placing hands or tools near moving mechanisms.
Expected outcome: The function completes repeatedly without aspiration or sample-handling errors. If the error recurs, stop and escalate.
If the Problem Persists
External causes involving specimen condition, positioning, carriers, accessories, accessible obstruction, and related readiness faults have been ruled out. The remaining issue may involve an internal actuator, sensor, tubing path, pressure or vacuum subsystem, alignment, or control mechanism requiring service-level evaluation.
The affected equipment should be:
- Removed from service.
- Labeled Out of Service.
- Sent for repair or bench evaluation.
- Evaluated using current BD documentation and approved test equipment.
- Repaired or configured only by qualified personnel.
Do not attempt deep disassembly or internal probe, valve, or actuator repair without approved service documentation and authorization.
After service, complete required functional checks and laboratory verification before return to use.
Clinical Use Tip
Preserve the original patient specimen whenever possible; do not repeatedly expose a limited specimen to a malfunctioning sample-handling mechanism.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Laboratory reported repeated sample-handling errors when using one loading accessory with the BACTEC FX."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found the external carrier was damaged and prevented the specimen from seating correctly."
Resolution
What action was taken.
Example:
"The damaged carrier was replaced with a known-good accessory, repeated operation completed normally, and the system was verified ready for use."
Helpful Details to Include (If Known)
- Exact error message
- Specimen or container involved
- Position or accessory affected
- Container condition
- Carrier or rack condition
- Obstruction or debris found
- Known-good comparison result
- Related system messages
- Whether the fault was intermittent or repeatable
- Final functional test result
- Final service status
Final Thought
Treat sample-handling errors as a system-isolation problem rather than immediately assuming an internal mechanism has failed. Protect the specimen, verify setup and accessories, and escalate when reliable operation cannot be demonstrated.
That is successful troubleshooting.