Argon supercore biopsy instrument with co-axial introducer needle was being utilized; 18gax9cm instrument with a 17gax3.9cm introducer needle was used and when ready to release the sample.At that time the cocking mechanism was pulled back and then pushed forward and the device fell apart.Tried 2 other devices from same lot number, 1 needle flew out when releasing the sample and landed on floor and the other device fell apart once mechanism was pulled back and pushed forward.Fda safety report id# (b)(4).
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