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What This Guide Helps With
Troubleshooting iQ200 sample aspiration, low flow, clogging, probe, tubing, or flow cell blockage symptoms before escalation.
Step-by-Step Troubleshooting
Ensure Patient Safety First
Confirm the iQ200 is not actively processing patient specimens before opening covers, handling sample racks, checking tubing, or initiating cleaning.
If urine microscopy testing is needed immediately, have laboratory staff use another validated analyzer or follow approved downtime procedures.
Expected outcome: No patient specimen is delayed, lost, or resulted from an analyzer with unresolved aspiration or flow issues.
Stop Additional Testing
Ask laboratory staff not to load additional racks or specimens until the aspiration issue is resolved.
Confirm whether any specimen was in process when the error occurred and whether results were completed, flagged, rejected, or need repeat testing per lab policy.
Expected outcome: Questionable or incomplete urine microscopy results are not released.
Verify the Reported Symptom
Ask staff what they observed.
Check whether the issue involves:
- Sample aspiration error
- Low sample volume message
- Flow cell blockage warning
- Repeated clog or obstruction message
- No sample movement through tubing
- Bubbles in the sample path
- Carryover or abnormal image quality after aspiration
- Failure only with certain specimens
Expected outcome: The issue is confirmed as an aspiration or fluid path problem, not a rack transport, barcode, LIS, or general startup issue.
Inspect the Sample Tube or Specimen Container
Confirm the specimen container is appropriate for the analyzer and contains enough urine for aspiration.
Check for short sample volume, foam, heavy sediment, mucus, crystals, clots, or debris that may interfere with aspiration.
Expected outcome: The sample itself is not the cause of low aspiration or flow blockage.
If the issue is limited to one poor-quality specimen, have the lab repeat or process the sample according to laboratory policy and stop troubleshooting the analyzer.
Check Sample Rack Loading and Position
Verify the rack is seated correctly and the sample container is positioned properly for probe access.
Look for tilted tubes, incorrect container height, caps left on, damaged racks, or anything preventing the probe from reaching the sample correctly.
Expected outcome: The probe can access the sample without obstruction or misalignment.
Inspect the Aspiration Probe Externally
Visually inspect the sample probe for dried urine, residue, bent appearance, or obstruction at the probe tip.
Do not force anything into the probe or attempt internal probe repair.
Expected outcome: The probe appears clean, straight, and unobstructed from the accessible exterior view.
Run the Approved Cleaning or Rinse Cycle
Use the analyzer’s normal operator-accessible cleaning, rinse, or unclog routine if available and permitted by site procedure.
This matters because dried urine sediment, crystals, or debris can temporarily restrict flow without indicating a failed internal component.
Expected outcome: The analyzer completes the cleaning cycle without repeating the aspiration or blockage error.
If the cleaning cycle clears the error and verification testing passes, return the device to service and stop.
Check Reagent, Rinse, and Waste Containers
Verify required fluids are present, connected, seated correctly, and not expired if applicable.
Confirm waste is not full and that waste tubing is not kinked, pinched, disconnected, or routed uphill in a way that could restrict drainage.
Expected outcome: Fluid handling is not being limited by an empty supply, full waste container, or external tubing restriction.
Inspect External Tubing and Connections
Check visible tubing for kinks, pinches, loose fittings, air gaps, crystallized residue, or leaks.
Pay close attention to tubing that may have been moved during cleaning, reagent replacement, waste handling, or bench relocation.
Expected outcome: The external fluid path is connected, routed correctly, and free of obvious restriction.
Look for Leaks, Bubbles, or Abnormal Fluid Movement
During a safe prime, rinse, or cleaning cycle, observe whether fluid moves consistently through visible tubing.
Watch for excessive air bubbles, dripping, no fluid movement, or fluid backing up.
Expected outcome: Fluid movement appears steady and controlled without visible leakage or air intrusion.
Check Recent Maintenance or Consumable Changes
Ask whether the issue started after:
- Probe cleaning
- Flow cell cleaning
- Reagent or rinse replacement
- Waste container emptying
- Tubing movement
- Analyzer relocation
- Processing highly sedimented specimens
Expected outcome: Any recent change that could have introduced air, a loose connection, or a blockage is identified.
Repeat Startup, Prime, or System Check
After correcting external fluid, sample, rack, or tubing concerns, restart the analyzer or run the appropriate startup/prime/system check per facility procedure.
Expected outcome: The iQ200 completes its check without aspiration, flow, or blockage errors.
Run Quality Control or Verification Testing
Before returning the analyzer to clinical use, confirm acceptable QC or verification performance according to lab policy.
Expected outcome: The analyzer demonstrates acceptable aspiration and result performance before patient testing resumes.
Return to Service Only if the Issue Is Fully Resolved
Return the iQ200 to service only if aspiration is normal, no blockage error returns, QC is acceptable, and there are no leaks, abnormal sounds, unusual heat, or fluid handling concerns.
Expected outcome: The device is safe and reliable for patient specimen processing.
If the Problem Persists
If the iQ200 continues to show sample aspiration, low flow, or flow cell blockage errors after sample quality, rack position, fluids, waste, tubing, cleaning cycles, and verification testing have been checked, common external causes have been ruled out.
The issue may involve an internal fluidics component, pump, valve, sensor, probe pathway, or flow cell condition requiring service evaluation.
The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
Knowing when to stop is proper troubleshooting. Do not continue repeated patient testing on an analyzer with unresolved aspiration or flow cell blockage concerns.
Clinical Use Tip
Do not troubleshoot aspiration or flow blockage issues while patient specimens are actively processing. Move testing to another validated method first, then troubleshoot only when it is safe to interrupt analyzer operation.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Laboratory staff reported the Beckman Coulter iQ200 was generating repeated sample aspiration and flow cell blockage errors during urine microscopy testing."
Cause
What was observed during troubleshooting.
Example:
"Found heavy sediment in the affected specimen and visible air bubbles in the external sample fluid path after a recent rinse container change."
Resolution
What action was taken.
Example:
"Reseated fluid connections, verified rinse and waste setup, ran the approved cleaning and prime routine, completed QC successfully, and returned the analyzer to service."
Helpful Details to Include (If Known)
- Error message or alarm displayed
- Whether issue affected one specimen or all specimens
- Specimen appearance, sediment, foam, clots, or crystals
- Rack and tube position checked
- Probe exterior inspected
- Cleaning or unclog routine completed
- Rinse, reagent, and waste status verified
- External tubing checked for kinks or leaks
- Bubbles, fluid movement, or backup observed
- QC or verification result after troubleshooting
- Final device status
Final Thought
Sample aspiration and flow cell blockage issues should be approached carefully because they can affect specimen processing and result reliability. Start with patient safety, specimen quality, rack loading, fluids, waste, tubing, and approved cleaning routines before suspecting internal failure. Clear documentation helps show that troubleshooting was logical, safe, and properly escalated when needed.
That is successful troubleshooting.