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US 7,402,156 B2Granted
Counter pressure device for ophthalmic drug delivery
AssigneeAlcon Inc.
InventorsCharles C. Kiehlbauch, James E. Chastain, Daniel P. Leavitt, Randal L. Berardi
Life of this patent
Estimating the term…
Abstract
A counter pressure device for ophthalmic drug delivery. The device includes a handle and a head coupled to a distal end of the handle. The head comprises a curved, concave surface for contacting the conjunctiva and having a notch for removably receiving a cannula. The device minimizes or prevents drug reflux and facilitates drug placement during ophthalmic drug delivery.
Claims2
A counter pressure device for minimizing drug reflux during ophthalmic drug delivery with a cannula, comprising:
- a handle;
- a head coupled to a distal end of said handle, said head comprising a curved, concave surface for contacting a conjunctiva and a notch centrally disposed on said curved, concave surface for removably receiving a cannula, wherein:
- said head is made of silicone;
- said curved, concave surface has a radius of curvature of about 10 mm to about 14 mm and a thickness of about 1.2 mm to about 3 mm;
- said notch has a radius of curvature of about 0.2 mm to about 1 mm;
- and
- a portion of said curved, concave surface outside of said notch is formed with a slippage preventing texture comprising a plurality of knurls, each of said knurls having a pyramidal geometry.
4 more elements
Dependencies are inferred from the claim text.