Ophthalmic cannula and retaining feature therefor
AssigneeNovartis AG
InventorFrancisco Javier Ochoa
Life of this patent
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Abstract
A cannula may include a tubular section having a distal end, a proximal end, and forming a passage, and an elastomeric membrane coupled to and encircling the tubular section. The cannula may also include a valve that is movable between an open condition and a closed condition to selectively provide access to the passage defined by the tubular section. When the tubular section is inserted into an eye during an ophthalmic surgery, a concave surface of the elastomeric membrane acts as a suction cup to retain the cannula device onto a surface of an eye.
Claims20
A cannula for use in ophthalmic surgical procedures comprising:
- a tubular section defining a passage, the tubular section comprising:
- a proximal end;
- and
- a distal end;
- an elastomeric membrane coupled to and encircling the tubular section at the proximal end of the tubular section, the elastomeric membrane comprising:
- a first surface;
- and
- a second surface opposite the first surface, the second surface defining a concave surface adapted to engage a surface of an eye.
A cannula for use in ophthalmic surgical procedures comprising:
- a seal moveable between an open condition and a closed condition;
- a tubular section extending distally from the seal and defining a passage, the tubular section comprising:
- a proximal end;
- and
- a distal end, the seal providing access to the passage when the seal is in the open condition and inhibiting access to the passage when the seal is in the closed condition;
- and
- an elastomeric membrane coupled to and at least partially encircling the tubular section at the proximal end of the tubular section, the elastomeric membrane comprising:
- a first surface disposed adjacent to the seal;
- a second surface opposite the first surface;
- and
- one or more suction-cup features disposed on the second surface, the suction-cup features configured to engage a surface of an eye when the distal end of the tubular cannula section is positioned in the eye.
Dependencies are inferred from the claim text.