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What This Guide Helps With
Troubleshoots reagent-transfer, aspiration, fluid-movement, tubing, container, connection, and obstruction conditions associated with a reported probe, pipettor, or aspiration-type error.
Step-by-Step Troubleshooting
1. Protect Specimens and Stop Unreliable Processing
If an aspiration or fluid-transfer condition occurs during tissue processing, have laboratory personnel assess the specimens and processing stage before further troubleshooting.
Do not continue processing when reagent transfer is unreliable.
Expected outcome: Specimens are protected and the processor is not relied upon for uncertain fluid movement.
2. Record the Exact Error
Capture the exact message displayed by the Tissue-Tek VIP 6 AI rather than relying only on the general description “probe,” “pipettor,” or “aspiration error.”
Determine which reagent or stage was active when the problem occurred.
Expected outcome: The actual fluid-transfer complaint and affected portion of the cycle are identified.
3. Inspect Reagent Availability
Confirm that the required reagent container is present and contains sufficient usable reagent according to laboratory procedures.
Check for an incorrectly positioned or disconnected container.
Expected outcome: The affected reagent source is present and correctly installed.
4. Inspect Accessible Fluid Connections
Check accessible tubing, caps, fittings, and container interfaces for loose connections, kinks, compression, leakage, damage, or obvious blockage.
Do not disassemble internal valves, pumps, or manifolds.
Expected outcome: The external reagent path is properly connected and unobstructed.
5. Check Waste and Venting Conditions
Inspect accessible waste containers and associated connections for improper installation, overfill conditions, kinks, or other obvious conditions that could interfere with normal fluid transfer.
Verify that external openings or connections intended to remain unobstructed are not blocked.
Expected outcome: Waste and accessible venting arrangements are normal.
6. Look for Residue or Contamination
Inspect routinely accessible areas associated with reagent transfer for paraffin, tissue debris, dried reagent, or other residue that could interfere with normal operation.
Clean only areas approved for routine access.
Expected outcome: No external residue is interfering with fluid movement.
7. Compare the Affected Reagent Position
If the problem appears limited to one reagent position, compare its container, connection, and routing with another correctly functioning position.
Do not interchange incompatible reagents for testing.
Expected outcome: A container or connection-specific problem is identified, or the fault remains associated with the processor.
8. Perform an Approved Functional Check
With patient specimens removed from risk, perform an approved operating or service check that exercises the relevant fluidics function if such a check is authorized and available.
Do not manually energize internal pumps or valves.
Expected outcome: Fluid transfer completes without the error. If it does, proceed to final verification and stop troubleshooting.
9. Verify Reliable Operation
Confirm that the affected fluidics condition no longer recurs and that there are no leaks, abnormal sounds, or additional warnings.
Expected outcome: Reagent transfer is reliable and the processor is suitable for return to service.
If the Problem Persists
If reagent availability, containers, accessible tubing, fittings, waste setup, contamination, and external obstructions have been ruled out, common external causes have been eliminated.
The remaining cause may involve an internal pump, valve, pressure or vacuum control system, internal tubing, fluid sensor, obstruction, control electronics, or related service-level component.
The device should be:
- Removed from service.
- Labeled Out of Service.
- Sent for repair or qualified service evaluation.
- Evaluated using appropriate Sakura Finetek documentation and approved test equipment.
- Repaired only by qualified personnel.
Do not continue processing specimens with unreliable reagent transfer. Complete applicable leak, fluidics, and functional verification before return to service.
Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
A fluid-transfer fault can alter specimen exposure to processing reagents even if the cycle appears to continue, so treat repeated aspiration-type errors as clinically significant.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Laboratory staff reported a repeated fluid aspiration error during tissue processing."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found an accessible reagent tubing connection partially kinked at the container interface."
Resolution
What action was taken.
Example:
"The tubing was correctly repositioned, the connection was inspected for damage, approved fluid-transfer operation was verified without recurrence, and the processor was returned to service."
Helpful Details to Include (If Known)
- Exact error message
- Processing stage when the error occurred
- Reagent involved
- Reagent level and container condition
- Tubing and fitting condition
- Evidence of leakage
- Waste-container status
- Visible residue or obstruction
- Functional check result
- Final device status
Final Thought
Protect specimens, verify reagent sources and accessible fluid paths before suspecting internal pumps or valves, stop when reliable transfer cannot be demonstrated, and document the final findings clearly.
That is successful troubleshooting.