(b)(4).Batch # r93d02.Additional information requested: did the generator display any error messages and if so what were they? did the device pass the pre-test? had the device been working and then stopped? did the patient experience any adverse consequences due to this issue? additional information received: no further information available.Investigation summary: the device was received with no apparent damage.It was connected to a generator, evaluated with a test instrument and was found to be functional.The instrument was disassembled to inspect the internal components.The moisture indicator was positive.The handpiece has a number of seals to prevent fluids from entering the housing."positive moisture indicator¿ describes a condition where water enters the handpiece cavity during the steam sterilization process.The primary path of ingress is the distal seal, this may be caused by a reduction of the compressive force on the distal seal.However no definitive root cause could be drawn.It is probable that the ingress of moisture affected handpiece functionality.A manufacturing record evaluation was performed for the finished device batch number, and no non-conformances were identified.
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