Troubleshooting and Maintenance of Sysmex XN-9000

These parameters are not all activated by default. The laboratory can gradually adopt optional applications such as RET, PLT-F, BF, HPC, etc. according to clinical needs, without the need to replace the analyzer. Specific reagents only need to be connected when the corresponding channel is activated, which not only protects the initial investment but also maintains economic operating costs.

Common troubleshooting

Sample injection malfunction. Sample rack jamming, barcode unreadable, and puncture needle blockage are common issues. Check whether there are foreign objects on the track, whether the sample rack is deformed, whether the barcode is pasted flat, and whether the puncture needle is bent or blocked. Perform injection needle cleaning, check negative pressure and pipeline sealing. If barcode reading fails, check the barcode quality, scanning window cleanliness, and LIS correspondence.

Block the hole. Blocking the counting hole can lead to low counting and frequent alarms. Perform cleaning procedures, backwash, soak, and check whether the hemolytic agent and cleaning solution are sufficient and expired. If the hole is repeatedly blocked, check whether the sample has agglomerated and whether fibrin has precipitated. If necessary, replace the counting cell or tubing.

Reagent malfunction. Insufficient or expired reagents, as well as pipeline bubbles, can all affect the results. Check the remaining amount, expiration date, batch number of the reagent, and inspect for any air leaks in the tubing and blockages in the reagent probe. Perform exhaust and blank counting after replacing the reagent. RU-20 can reduce the frequency of replacement, but it still needs to be checked regularly.

Quality control abnormality. Expired quality control products, improper reconstitution, target value errors, and calibration failures can all lead to uncontrolled quality control. Check the storage conditions, reconstitution time, mixing method of quality control products, and verify the target value and standard deviation. Check the Levey Jennings chart to determine whether it is a random error or a systematic error. Re calibrate if necessary.

The result is abnormal. WBC, RBC, PLT are low or high, accompanied by an alarm. Check whether the specimen is agglutinated, lipophilic, jaundice, hemolysis, check for blockage, calibration, and reagents. View DIFF scatter plot and histogram to identify abnormal cell populations. If necessary, slide the film for microscopic examination.

Communication malfunction. LIS connection failed, result not transmitted. Check the network IP、 Port, LIS settings, middleware status. Restart the communication module and check the network cable and switch. Confirm the result review rules and transmission queue.

Mechanical malfunction. Motor, sensor, and air circuit faults. Check the error code, sensor position, air path pressure, and motor operation. Perform mechanical reset and initialization. If the module fails to initialize, check the power and communication.

Power supply and startup. The main switch is unresponsive. Check the power supply, fuse, and emergency stop button. XN-9000 is equipped with a single main switch for easy startup. If the module fails to start, check the power distribution and inter module connections.

Calibration and Quality Control

Calibration is the foundation for accurate results. Use Sysmex calibrators and follow the manufacturer's recommended frequency. Perform cleaning before calibration and verify quality control after calibration. CBC, DIFF, RET, PLT-F, BF, HPC are calibrated separately. When calibration fails, check the reagents, calibrators, pipelines, detectors, pumps, and valves. After calibration is passed, record the calibration coefficient and date.

Quality control is performed daily, using normal and abnormal level quality control products. Record the Levey Jennings chart and participate in the inter laboratory quality evaluation. When quality control is out of control, judge according to the rules of 1-3s, 2-2s, R-4s, 4-1s, and 10x. Correct and re quality control. Quality control products should be treated equally with patient samples to avoid repeated freezing and thawing.

Maintenance and upkeep

Daily: Clean the injection needle, check the remaining amount of reagents, empty the waste liquid, and check the printing paper. Weekly: Clean the counting tank, inspect the pipeline, and perform blank counting. Monthly: Clean the filter, inspect the pump tube, and clean the cooling fan. Quarterly: Replace pump tubing, clean colorimetric cell, and inspect valve membrane. Every year: comprehensive maintenance, replacement of aging pipelines, sealing rings, and pump pipes.

SP-10: Regularly replace dye solution, clean glass slides, inspect nozzles, and clean the drying module. DI-60: Clean lens, calibrate white balance, check automatic film feed. TS-10: Clean sensors, inspect robotic arms, and clean sorting areas. RU-20: Check the remaining amount of reagents, pipeline sealing, and refrigeration temperature.

The maintenance records should be complete, including dates, projects, results, and operators. Discover anomalies and handle them promptly to prevent small problems from escalating into major malfunctions.