| 摘要 |
An annular cutter comprising a tubular body with a cutting blade rotational around a central axis, and a finger slot at the upper end of the axis. The cutting blade cuts out a portion of a body organ as the tubular body is turned repeatedly while it is kept in stable position by a finger inserted into the slot at the upper end of the cutter. Means retaining the cutout portion of the body organ are further provided.
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