Pressure-assisted biopsy needle apparatus and technique
US6485436B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Aug 10, 2000 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Aug 10, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/1425
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An improved biopsy needle assembly for efficient removal of multiple biopsy cores from a single needle penetration. The needle apparatus comprises an elongate assembly of paired sleeves with an open notch in the wall of the outer sleeve for engaging a tissue volume in the bore of that sleeve. An inner sleeve or blade member with a sharp blade edge is moveable from a retracted position to an extended position to both (i) excise the tissue volume, and (ii) function as valve means to alter the open notch between an open position and a closed position. The invention provides a looped inflow-outflow passageway system for using high-pressure fluid flows to push or expel the excised tissue from the bore in working end where the excised tissue is captured. The looped passageway system is coupled to a remote pressurization source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.