Phacoemulsification Needle
OwnerGraham David Barrettinventor
Life of this patent
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Abstract
A phacoemulsification needle is provided having a rod member (12) arranged for transmission of ultrasonic energy to an ocular substrate to effect emulsification thereof, and a hollow tube member (14) having an inner surface (18) defining a lumen arranged for aspiration of emulsified ocular material, the hollow tube member (14) being disposed about the rod member (12), the rod member (12) having a distal end (11) and a proximal end (13) and the hollow tube member (14) having a distal end (19) and a proximal end (17).
Claims29
A phacoemulsification needle characterised by a rod member arranged for transmission of ultrasonic energy to an ocular substrate to effect emulsification thereof, and a hollow tube member having an inner surface defining a lumen arranged for aspiration of emulsified ocular material, the hollow tube member being disposed about the rod member, the rod member having a distal end and a proximal end and the hollow tube member having a distal end and a proximal end.
A phacoemulsification needle according to any one of the preceding claims, characterised in that the rod member is of circular, oval or polygonal shape in cross section.
A phacoemulsification needle according to any one of the preceding claims, characterised in that the rod member has a distal end which is flat, concave, convex or hemispherical.
A phacoemulsification needle according to any one of the preceding claims, characterised in that the rod member has an elongate outer surface which is ridged, grooved or provided with protuberances to generate turbulence in the lumen in use.
A phacoemulsification needle according to any one of the preceding claims, characterised in that hollow the tube member is circular or oval in cross section.
A phacoemulsification needle according to any one of the preceding claims, characterised in that the hollow tube member has an outer surface and the inner surface which define an annular wall.
A phacoemulsification needle according to any one of the preceding claims, characterised in that the hollow tube member has distal and proximal portions formed of relatively rigid metallic material whilst a mid section is formed of relatively flexible plastics material.
A phacoemulsification needle according to any one of the preceding claims, characterised in that the inner surface of the hollow tube member is provided with ridges, grooves or protuberances to generate turbulence in the lumen in use.
A phacoemulsification needle according to any one of the preceding claims, characterised in that the hollow tube member has a rubberised exterior or a flexible sleeve applied to an exterior surface thereof to reduce wound leakage.
A phacoemulsification needle according to any one of the preceding claims, characterised in that the phacoemulsification needle is arranged for use in bimanual phacoemulsification procedures.
A phacoemulsification needle according to any one of the preceding claims characterised in that the rod member is solid throughout.
An irrigation cannula or irrigating chopper characterised by a hollow tube member extending about the cannula or chopper, which hollow tube member has a flexible mid portion to reduce wound leakage.
Dependencies are inferred from the claim text.