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US 4,903,709 AGranted
Biopsy method
OwnerBruce A. J. Skinnerinventor
Life of this patent
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Abstract
A biopsy needle, for sampling tissue and the like, including a sidewall defining a hollow interior and a sharpened end. The needle has a lanced section which is formed from material of the sidewall itself and defines a rearwardly sloping, rearwardly facing blade disposed within the hollow interior of the needle. Tissue is sampled per insertion of the needle by severing the tissue with the sharpened end, passing the tissue into the hollow interior and slicing the tissue off by rotating the blade through 360 degrees. The sliced off sample is securely held by the blade as the needle is withdrawn.
Claims12
A method for sampling body tissue comprising:
- providing a biopsy needle having a sidewall defining a hollow interior portion, a sharpened end associated with said sidewall for severing the tissue as the needle is inserted, and a lanced section disposed along said sidewall, said lanced section being formed from material of said sidewall itself and defining a rearwardly sloping, rearwardly facing blade penetrating said hollow interior portion;
- inserting said biopsy needle into the tissue;
- severing said tissue with said sharpened end;
- passing said tissue into said hollow interior;
- and
- slicing off a tissue sample with said rearwardly sloping, rearwardly facing blade by rotating said needle and said blade 360 degrees;
- withdrawing said needle and said tissue sample from said body.
4 more elements
Dependencies are inferred from the claim text.