| 摘要 |
A controlled surgical core biopsy system that is operated with one hand. The system includes a gun unit, a needle adaptor system, and the needle assembly. The needle adaptor system links the needle assembly to the gun unit. The gun unit may have a single trigger or double triggers. The single trigger embodiment requires manual insertion of the needle assembly into the tissue of interest. Once the needle assembly is manually inserted, the single trigger controls the cocking and firing of the cutting cannula over the inner stylet to trap tissue specimens in a specimen notch. As the cutting cannula is fired, the stylet and cutting cannula may be displaced vertically to facilitate the tissue specimens being trapped in the specimen notch. The double trigger embodiment, like the single trigger embodiment, requires only one hand to operate. This embodiment includes a gun unit, a needle adaptor system, and a needle assembly. The double trigger embodiment requires that the needle assembly be manually inserted into the patent adjacent the tissue of interest. The upper trigger is used to advance the inner stylet and of the needle assembly a desired depth into the tissue of interest. The second trigger is used to cock and fire the outer cutting cannula to trap tissue specimens in the specimen notch of the stylet. When the outer cutting cannula is fired, the needle adaptor system and the stylet may move vertically upward. This vertical movement assists in placing the tissue specimens in the specimen notch.
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