Patent · US Expired

Biopsy needle

US4543966A · kind A · utility

145Cited by
8References
16Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 16, 1984
Grant dateOct 1, 1985
Priority date—
Expiry dateMay 16, 2004

Classification

  • Technology area (CPC A)Human Necessities
  • CPC primaryA61B2010/0258
  • WIPO fieldMedical technology
  • WIPO sectorInstruments

Abstract

Biopsy needles comprising an elongate hollow needle having an inwardly tapered front end portion terminating in a cutting edge have been used for taking bone marrow biopsies, but difficulties occur, inter alia, in breaking off the biopsy from the remainder of the marrow and retaining it in the needle. This difficulty is overcome by the needle having a front end portion of smaller internal cross-section than the remainder of the needle, with an internal shoulder or step where the said front portion adjoins the wider internal portion of the needle. The shoulder is adapted to break or cut the biopsy from the remainder of the marrow and retain it within the needle.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.