Importance

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Abstract

The present invention is directed to a bone marrow biopsy device including an outer cannula, an outer cannula handle having a locking member, an inner rod, an inner rod handle having a locking member, and an independent locking element. The outer cannula handle locking member further comprises a flange element, and the inner rod handle locking member further comprises at least one prong. In one embodiment, the locking element comprises a cylindrical sleeve surrounding the at least one prong and the flange element. The cylindrical sleeve comprises at least one slot which aligns with the at least one prong when the locking element is in its unlocked orientation. The locking element is placed into its locked orientation by rotation of the locking element about the at least one prong and the flange element such that the at least one prong no longer aligns with the at least one slot and is therefore prevented from passing over the flange element. In another embodiment, the locking element comprises at least one bar extending completely through the inner rod handle, preventing disengagement of the at least one prong from the at least one flange element. Further, the bone marrow biopsy device may include at least one grip enhancement member formed from a material distinct from that of the handles, which may extend outwardly such that the user's palm is prevented from coming in contact with the locking element during use of the device.

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First Claim