Tissue needle
OwnerDonald N. Mehlinventor
Life of this patent
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Abstract
Tissue needle for extracting a biopsy sample including a pistol style squeezable hand grip for single hand biopsy tissue needle operation. A spring tensioned sliding cannula, including a configured cutting edge, actuates by a squeeze trigger and cam arrangement to slide over a fixed position stylet for entry into a tissue sample area. A squeeze trigger manually cycles using one hand to obtain a biopsy sample contained in a tissue sample notch of the sharp stylet tip whereupon the tissue needle is manually withdrawn. The soft tissue can be liver tissue, kidney tissue, growth area tissue, or a like tissue. The tissue needle can have other medical biopsy uses in either human or animals.
Claims3
A tissue needle for extraction of biopsy tissue comprising:
- a. stationary stylet means affixed in a handle and including a sharp tip;
- b. movable cannula means extending into said handle, including a configured cutting edge, for sliding coaxially over and about said stylet means;
- c. means affixing said cannular means to a linkage bar pivotally mounted in said handle;
- d. actuator trigger bar means pivotally mounted in said handle and in cam engagement with said linkage bar;
- and,
- e. return compression spring positioned on said cannula and between the pivoting linkage arm and the handle.
Dependencies are inferred from the claim text.