Counter pressure device for ophthalmic drug delivery
First Claim
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1. 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.
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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.
23 Citations
2 Claims
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1. A counter pressure device for minimizing drug reflux during ophthalmic drug delivery with a cannula, comprising:
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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. - View Dependent Claims (2)
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Specification