The subject device was returned to olympus medical systems corp.(omsc) for evaluation.Omsc evaluated the subject device, and the reported failure phenomenon could not be reproduced.There was no evidence of spark in the subject device.As a result of the investigation, omsc judged that the subject device meets the specification.However, it was confirmed that dusts accumulated in the subject device.The device history record was reviewed and found no irregularities.Based on the investigation result, it was surmised that the possible cause of the reported failure phenomenon was spark occurred for a moment between dust and electrodes in the subject device at turning on the subject device.The clv-290 instruction manual states the corresponding method when there is an abnormality for the device.
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