D5: operator of device was not provided and is unknown.E4: initial reporter also sent report to fda was not provided and is unknown.This remediation mdr was generated under protocol (b)(4), as a result of warning letter cms# (b)(4).No problems or issues were identified during this device history record review.The device was returned and found all intact.There was no evidence of error message on the event history log (ehl).Visual and function testing was performed.The technician ran three accuracy tests, the pump was found to be within manufacturing specifications.The reported problem was not duplicated.An expulsor assembly was replaced to address the issue.No actions for the current issue.The root cause of the reported issue was unable to be determined.
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