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What This Guide Helps With
Addresses delayed, missing, or inconsistent staining workflow outcomes caused by rack tracking, reagents, programs, communication, interruptions, or equipment performance.
Step-by-Step Troubleshooting
1. Protect Patient Slides and Do Not Release Questionable Results
Hold any affected slides from clinical interpretation if staining status, processing history, or identification is uncertain. Use an alternate verified workflow when necessary.
Expected outcome: Patient results are not based on uncertain or incomplete staining.
2. Define What “Delayed, Missing, or Inconsistent” Means
Determine whether a rack was delayed, a staining cycle did not complete, the system did not record expected workflow information, staining quality varied, or downstream communication was missing.
Expected outcome: The issue is separated into processing, staining-quality, tracking, or communication categories.
3. Confirm Rack and Slide Identification
Verify the affected rack or carrier was recognized correctly and that slide identification remained associated with the expected workflow.
Expected outcome: The correct specimen carrier and workflow are confirmed.
4. Review the Selected Staining Program
Verify the intended user-accessible staining program was selected and that the rack was assigned to the expected process.
Expected outcome: The configured workflow matches the requested staining process.
5. Inspect Reagents and Station Assignments
Confirm required reagents are correctly positioned, properly seated, and consistent with the intended staining protocol.
Expected outcome: The physical reagent arrangement supports the selected workflow.
6. Check for Interrupted Operation
Determine whether a power interruption, restart, fluidics fault, door or loading interruption, rack-detection problem, or communication issue occurred during the affected process.
Expected outcome: Any event capable of delaying or interrupting processing is identified.
7. Check External Fluid and Waste Conditions
Inspect applicable water, drain, waste, and reagent conditions for restrictions or abnormal status that could slow or interrupt processing.
Expected outcome: External fluid-handling conditions are normal.
8. Evaluate Communication Separately When Data Is Missing
If staining completed but information is absent from an LIS or other downstream system, verify local network connections and determine whether the problem is limited to data transfer rather than the staining process itself.
Expected outcome: Processing problems are distinguished from communication problems.
9. Perform Controlled Functional Verification
Using an approved test workflow, confirm rack recognition, program selection, reagent status, processing completion, and any required downstream communication.
Expected outcome: The workflow completes consistently from loading through the expected endpoint. The issue is resolved and troubleshooting can stop.
10. Escalate Unexplained or Recurrent Inconsistency
If processing delays, missing workflow information, or inconsistent staining continue after external causes are ruled out, remove the stainer from clinical use.
Expected outcome: The system is referred for qualified service rather than used when process reliability cannot be demonstrated.
If the Problem Persists
Common rack identification, reagent setup, program selection, fluid connections, workflow interruptions, and external communication causes have been ruled out. Remaining possibilities include internal motion control, sensing, timing, software, configuration, data handling, or another service-level fault.
Remove the device from service, label it Out of Service, and send it for repair or bench evaluation. Evaluate it using appropriate Leica Biosystems documentation and approved test equipment. Internal repairs and protected configuration changes should be performed only by qualified personnel.
Before return to service, verify consistent staining workflow, specimen tracking, and applicable communication functions. Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
When staining appears complete but workflow data is missing, separate the physical staining process from the electronic communication path before repeating patient work.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Laboratory staff reported that one rack was significantly delayed and its expected workflow status was not updating on the HistoCore SPECTRA ST."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found the rack was not fully seated in the loading position and was being detected inconsistently."
Resolution
What action was taken.
Example:
"Clinical Engineering corrected the rack position, verified consistent recognition and completion of a controlled workflow, and returned the stainer to service."
Helpful Details to Include (If Known)
- Rack or slide set affected
- Exact delayed or missing workflow condition
- Program selected
- Reagent and station configuration
- Rack-detection status
- Power or restart events
- Water, drain, and waste condition
- Network or LIS status
- Controlled test results
- Final device status
Final Thought
Protect affected specimens, distinguish staining problems from tracking and communication problems, verify external causes before assuming internal failure, confirm the complete workflow after correction, and escalate recurring inconsistency appropriately.
That is successful troubleshooting.