Sysmexkx-21 failure of automated blood analyzer - Analyzer - Medical Devices Industry
Sysmexkx-21 failure of automated blood analyzer - Analyzer - Medical Devices Industry
Sysmexkx-21 hematology analyzer East Asian companies in Japan to market the three categories in recent years, the 18 parameters of automatic blood cell analyzer.
This article describes the long-term use after a few cases there have been machine specific faults and troubleshooting.
The phenomenon of a fault Alarm after boot frequent replacement of equipment dilution, but dilution liquid to meet the requirements; run the fault remains after replacement kit program.
1.1 Failure Analysis Analyze the change of dilution alarm principle: Under normal circumstances, equipment is diluted by its own cup (buffer cup) of the float switch to determine whether the dilution cup required, if less than its trigger point It will generate the signal sent to the CPU, the CPU to issue instructions to open SVl, SV2 work to promote the formation of suction cup situation, through the suction reagents
To float within a specified time after the trigger point, it signals an order by the CPU shut down SVI, SV2; if not to float within a specified time to reach the trigger point, it will alarm equipment replacement diluent. Thus, failure reason may be as follows: the float switch failure; SVl, SV2-controlled main valve failure; enough negative pressure; CPU board failure.
1.2 Troubleshooting First float switch with a multimeter to measure position in the upper and lower limits is working correctly, is normal, then check SVl, SV2 work, reflecting the normal; further examination suction pipe, found in the drive SRV cylinder, the cylinder's axis Department a leak phenomenon. Open cylinder examination revealed a leak sealing O-ring deformation due to aging. Replacement O-ring seal, the fault disappears.
Fault phenomena 2 WL more alarm devices, alarm probability of about 50%.
2.1 Failure Analysis As WL, white blood cell histogram for the identification of lines of high and low alarm, suggesting that the presence of platelet aggregation or large cell disruption. Peripheral blood as a result of the user that the blood platelet aggregation that may exist, but if the chance is 50% or more, the basic issue of blood can be excluded. Such failure should first check whether samples were contaminated, in general, pollution, there are 4 aspects: specimen container; diluent storage container; hemolysin; detection pipeline. If there is no problem, as a result mainly affects white blood cells, the next step should check the Department of WBC detection; and then re-check the circuit board PCBNO.2135, check WBC sensitivity is correct; final inspection simulation board.
2.2 Troubleshooting First specimen containers with a certain amount of dilution liquid, after mixing without adequate testing samples, the results in a high WBC value or failure at this time the scope of playing ***.*, small: the sample may be diluted with dilution liquid pollution; also possible that the specimen container contamination. Then repeatedly washed with diluted liquid specimen container, and then rinse the specimen containers complete a certain amount of dilution liquid to re-test, the results show the value of 0.01 WBC (This result is different from the last test value), so that the basic cause of the malfunction can be determined To: specimen containers contaminated. Further examination revealed stored specimens using a 2mL tube because the tube placed in the drawer, and not covered with lid, so there is pollution. The pollution particle size happens to the size of platelet aggregation, so equipment and alarms WL. Replacement of the tube, troubleshooting.
Failure phenomenon 3
Instrument detection process, the automatic alarm pressure cleaning often wrong.