Surgery – Diagnostic testing – Sampling nonliquid body material
Patent
1998-09-23
2000-03-07
O'Connor, Cary
Surgery
Diagnostic testing
Sampling nonliquid body material
604167, 604170, A61B 1000
Patent
active
060333693
ABSTRACT:
A disposable biopsy needle of simple construction is disclosed. The biopsy needle includes inner and outer tubes which are affixed, respectively, to a knob and handle assembly. A resiliently flexible lip is positioned within the handle to overlie and constrict the aperture through which the knob is received during assembly of the inner needle and the outer needle. During assembly, the lip deflects as the knob passes into the handle and then returns to an undeflected state once the knob is fully seated within the handle. The lip restrains axial movement of the knob and the inner tube in the fully assembled biopsy needle. The knob may be provided with a knurled surface which engages the free end of a resiliently flexible tab disposed within the handle when the knob is rotated. The interaction of ridges and valleys on the knurled surface with the free end of the flexible tab provides a positive tactile and audible indication of the relative rotation of the inner tube relative to the outer tube. The disposable biopsy needle may be subjected to a sterilization process to provide a sterile biopsy needle. A method for assembling a disposable biopsy needle is also disclosed.
REFERENCES:
patent: 4596559 (1986-06-01), Fleischhacker
patent: 5117838 (1992-06-01), Palmer et al.
patent: 5257632 (1993-11-01), Turkel et al.
patent: 5331972 (1994-07-01), Wadhwani et al.
patent: 5423848 (1995-06-01), Washizuka et al.
patent: 5807275 (1998-09-01), Jamshidi
O'Connor Cary
Wingood Pamela L.
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