The user facility report indicated that the service was completed following the failure of four cartridges.Service took place on (b)(6) 2022, between the third and fourth cartridge failures.A review of complaints identified four cartridge failure complaints.Two cartridge failures occurred on (b)(6) 2022, a third on (b)(6) 2022 and a fourth on (b)(6) 2022.Service was completed on (b)(6) 2022, during which the instrument's heater assembly was replaced and all system checks were completed; the instrument was fully operational and ready for normal use.Investigation of the complaints revealed that reported issues were related to individual cartridge issues and not the instrument.The first cartridge failure was due to error 2016 (ground voltage error).The subsequent cartridge failures were due to process control solution not detected.There was no known patient impact.Unable to determine the cause of the cartridge failures.The instrument operated as intended.There is no indication of a product quality issue with respect to manufacture, design, or labeling.As a precaution, the heater assembly was replaced on the instrument.However, investigation did not determine that the cause of the issue was instrument related.
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