The subject device has not been returned to omsc for evaluation but was returned to olympus (b)(4).Olympus (b)(4) checked the subject device and found the following.- there were oxidation traces on the metal tip surfaces at both ends of the tube.- there were oxidation traces on the surface and inner wall of the metal joint outside the lid.- there was no oxidation trace on the surface and inner wall of the metal joint inside the lid.- there were traces of likely oxide residues on the surface of the outer package and instruction manual.In addition, olympus (b)(4) surmised that these phenomena were not due to quality problems of the subject device, but due to the high humidity in the storage environment or long-term contact with oxides.The exact cause has been under investigation.Therefore, the exact cause of the reported event could not be conclusively determined at this time.If additional information is received, this report will be supplemented.
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