On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
Troubleshoots repeated sample-condition or volume-related errors by separating specimen problems from loading, identification, accessory, and analyzer-related causes.
Step-by-Step Troubleshooting
1. Protect the Patient Specimen
Do not repeatedly process a limited patient specimen through a system producing recurring sample-condition or volume errors. Coordinate with laboratory personnel to preserve the specimen and determine the approved alternate handling process.
If the specific BACTEC FX configuration does not directly generate the reported sample-condition terminology, identify which connected device or workflow component produced the message.
Expected outcome: Specimen integrity is preserved and the actual source of the reported error is identified.
2. Confirm the Error Pattern
Determine whether the message involves clot, bubble, insufficient volume, excessive volume, or another sample-condition warning. Confirm whether it occurs with one specimen or multiple specimens.
Record the exact message.
Expected outcome: The reported condition and its scope are clearly understood.
3. Inspect the Specimen Externally
Have laboratory personnel inspect the affected specimen or blood culture bottle for visible problems consistent with their laboratory procedure, including abnormal fill, container damage, leakage, or unsuitable condition.
Clinical Engineering should not alter specimen contents or attempt to correct specimen preparation.
Expected outcome: The specimen is externally acceptable for the intended workflow. If the error follows a clearly unsuitable specimen, laboratory personnel manage the specimen according to policy and equipment troubleshooting can stop.
4. Verify Correct Container and Fill Workflow
Confirm with laboratory staff that the appropriate collection container and collection process were used for the intended BACTEC workflow.
Do not invent or enforce fill-volume limits beyond the laboratory's validated procedure and manufacturer documentation.
Expected outcome: The specimen container and collection workflow are appropriate. If not, the laboratory addresses the collection issue rather than modifying the analyzer.
5. Verify Placement and Orientation
Ensure the specimen container is correctly seated and positioned without tilting, obstruction, or interference from labels or external material.
Expected outcome: The container is properly positioned. If correct positioning resolves the error, verify repeated normal recognition and stop.
6. Compare With Another Suitable Specimen or Test Item
When permitted, compare with a known-good laboratory-approved item to determine whether the problem follows the original specimen or persists at the same analyzer position.
Expected outcome: The problem is isolated to the specimen or analyzer. If the known-good item performs normally, equipment troubleshooting can stop and the original specimen should be managed by laboratory procedure.
7. Inspect the Position and Accessory
Inspect the affected holder, rack, carrier, or loading position for residue, obstruction, damage, or anything preventing normal seating.
Expected outcome: The position is clean and mechanically unobstructed. If cleaning or replacing an external accessory resolves the issue, proceed to final verification.
8. Check for Related System Errors
Review current operator-visible system status for other messages affecting detection, loading, temperature, or communication that could create a misleading secondary sample error.
Expected outcome: No unresolved system-level condition remains. If another external fault is found, correct it and reassess.
9. Verify With Repeated Normal Operation
After correcting an external cause, verify the affected position or workflow with an appropriate known-good item.
Do not declare the problem resolved based on one successful detection if the original complaint was intermittent.
Expected outcome: The system processes or detects appropriate items consistently without recurrence. If errors persist across known-good items, escalate.
If the Problem Persists
Specimen condition, container selection, placement, loading position, accessory condition, and related external faults have been ruled out. Persistent errors across multiple appropriate items may indicate an internal detection, sensing, alignment, software, or other service-level issue.
The affected equipment should be:
- Removed from service when specimen handling cannot be trusted.
- 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.
After service, complete appropriate functional verification and laboratory acceptance testing before return to use.
Knowing when the problem is no longer attributable to an individual specimen prevents unnecessary repeat handling and protects specimen integrity.
Clinical Use Tip
Do not repeatedly manipulate or rerun a limited patient specimen solely to prove an equipment fault; preserve the sample and use an approved alternate process.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Laboratory reported repeated sample-volume-related errors when bottles were loaded into one BACTEC FX position."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found residue in the affected holder prevented bottles from seating completely and consistently."
Resolution
What action was taken.
Example:
"The accessible holder was cleaned using the approved method, known-good bottles were detected consistently, and the position was returned to service."
Helpful Details to Include (If Known)
- Exact error wording
- Whether one or multiple specimens were affected
- Container type and external condition
- Collection or fill concern reported by laboratory staff
- Position or carrier involved
- Seating or orientation observed
- Known-good comparison result
- Residue or obstruction found
- Related system messages
- Results before and after correction
- Final service status
Final Thought
First determine whether the problem belongs to the specimen or the equipment. Protect specimen integrity, verify simple loading and accessory causes, and escalate when appropriate known-good items produce the same recurring fault.
That is successful troubleshooting.