| 摘要 |
An automatic biopsy instrument includes a cannula 13 provided over a stylet 11. The stylet 11 directs the cannular 13 to a biopsy site. The instrument urges the cannula 13 past the stylet 11 in order to collect a tissue sample and simultaneously causes a vacuum to be communicated to said cannular 13 in order to assist the collection of the tissue sample by the cannula 13.
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