The device history records (dhr) of the device concerned was reviewed.The production lot, to which the device concerned belongs, passed all in-process inspections test.No nonconformity or abnormality in the manufacturing processes of the device concerned was found.Our view; the facility has not reported any defects and malfunction in the product, and we determine that it is due to the patient's condition and usage.However, since health hazards to patients have occurred, and the causal relationship between health hazards and the product cannot be completely ruled out, we will submit mdr (30 days).
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