The investigation has been completed.A device history record (dhr) review was performed and found no non-conformances that would cause the reported malfunction.All records indicate that the device was manufactured in accordance with all applicable procedures.The instructions for use (ifu) states: "check the following for each connector.The connector should be fixed firmly.The o-rings should be free of abnormalities such as cracks, tears, or dents¿ the root cause could not be conclusively determined.Probable causes that could have led to the reported event include that the connecting tube could not be connected for the connector was loosen or broken.The breakage of the connector may have been due to stress, which was added to the connector by the user handling, and the accumulated stress toward loose direction.
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