Philips investigated this complaint and came to the following conclusion: the logfiles are no longer available, therefore we are unable to further investigate this issue.However, based on the symptoms, it is very likely that the issue is caused by the ¿10 seconds issue¿.This is a known issue.The occurrence per system ranges from 3-4 times per month to once every 1-2 months.The ¿10 seconds issue¿ may occur intermittently.The design of the system ensures that when the footswitch is released, the enable_x-ray line is made inactive, the x-ray is stopped immediately (or at least within 400 ms.).This is the case even if the handling of the x-ray stop in software is suffering a delay, causing also the x-ray indicators to be switched off some time after the footswitch has been released.In this specific situation the patient has had no extra dose, although it may look like this for the clinical user as the delayed prepare off keeps all visible and audible xray indicators alive.Conclusion of the analysis: the cause of the issue was not identified.As a preventive measure the system interface board box was replaced.However, based on the symptoms, it is very likely that the issue was caused by the 10 seconds issue.This is a structural issue.Philips is planning to solve this problem according the appropriate processes and will inform all stakeholders via regular channels.
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