Appeal No. 1999-0757
Application No. 08/699,083
cannula4 having a tapered distal end region, its central bore
does not terminate at an aperture having substantially the same
cross-sectional circumference as at least portions of the bore.
Independent claim 32 now recites a cannula and injection
site in combination comprising, inter alia, a blunt cannula
having a tube with (1) a central bore that extends throughout the
tube and terminates at an aperture and (2) a distal end region
with a tapered surface and a blunt radiused tip that
circumscribes the aperture. Garrett’s cannula has a distal end
region with a tip that circumscribes the aperture, but no tapered
surface or radiused tip. Buehler’s cannula has a distal end
region with a tapered surface and a blunt radiused tip, but no
aperture that is circumscribed by the blunt radiused tip.
Independent claim 36 now recites a cannula insertion member
comprising, inter alia, a tube having a distal end region (1)
defining at least one aperture in the distal end of the distal
end region, and (2) including a tapered exterior surface and a
radiused tip adjacent the tapered surface circumscribing and
defining, at least in part, the at least one aperture. Garrett’s
cannula does not have a distal end region with a tapered exterior
surface or a radiused tip. Buehler’s cannula does not have an
4 Webster’s New Collegiate Dictionary (G. & C. Merriam Co.
1977) defines a “cannula” as “a small tube for insertion into a
body cavity or into a duct or vessel.”
6
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