| 摘要 |
A biopsy needle, suitable for obtaining bone marrow biopsy cores, includes an outer tube member having a lumen extending therethrough, and at a distal end of the outer tube member an opening is provided for receiving a biopsy core. At the distal end, the outer tube member is generally oval in cross-section and thereby has an elongated dimension and a narrow dimension. An inner tube member is slidable and rotatable in the lumen of the outer tube member and has a set of pincers at its distal end. With the inner tube member slid through the lumen of the outer tube member and the pincers positioned at the distal end of the outer tube member and aligned with the elongated dimension, the pincers are in an open position. However, the pincers can be closed thereby to grasp and cut a biopsy core by rotating the inner tube member so that the pincers are aligned with the narrow dimension of the outer tube member. In another embodiment of the biopsy needle, the distal end of the outer tube member has two spaced apart projections extending in the lumen, and by cooperation with these projections, the pincers of the inner tube member can be opened or closed to grasp a biopsy core.
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