Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue
Patent
1989-09-11
1990-09-25
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
With means for cutting, scarifying, or vibrating tissue
606161, A61B 1720
Patent
active
049590499
ABSTRACT:
An improved tip for a phacoemulsification needle having a proximal end attached to a phacoemulsification device, a distal end, a central longitudinal axis extending from the proximal end to the distal end with a bore within the needle concentric to the central axis thereof, so as to form a lumen, the lumen includes needle sidewalls having an inner and outer surface with an opening at the proximal and distal ends of the needle, the tip is formed by the distal opening which, when viewed from an angle perpendicular to the central longitudinal axis has a side view including a top wall located at a needle sidewall on one side of the central longitudinal axis. The top wall terminates in a top wall end face. The needle tip further includes a bottom wall located at a needle sidewall on the opposite side of the central longitudinal axis and extending distal of the end face of said top wall to form a tip projection. An end wall is disposed generally perpendicular to the tip projection. An arcuate portion interconnects the tip projection and the end wall. A tip projection sidewall extends from the needle sidewall and the tip projection to the height of the end wall and terminates in a tip projection sidewall face being generally parallel to the tip projection.
REFERENCES:
patent: 3110304 (1963-11-01), Hartman
patent: 3955579 (1976-05-01), Bridgman
patent: 3996935 (1976-12-01), Banko
patent: 4681102 (1987-07-01), Bartell
patent: 4689040 (1987-08-01), Thompson
patent: 4808154 (1989-02-01), Freeman
patent: 4838853 (1989-06-01), Parisi
patent: 4850354 (1989-07-01), McGurk-Burleson et al.
Maglione C.
Rosenbaum C. Fred
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