Implanting oversized objects into surgical beds

Patent metadata

Field	Value
Publication number	US-9724234-B2
Application number	US-201214360607-A
Country	US
Kind code	B2
Filing date	Nov 21, 2012
Priority date	Nov 29, 2011
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

The present invention relates to a deformable object to be implanted into a surgical site (exemplified by but not limited to a cornea lenticule, e.g., that could be native corneal tissue or a synthetic or biosynthetic construct), surgical instrumentation for altering the curvature and arc length of the deformable object to be implanted (e.g. corneal lenticule), as well as methods for introduction of the deformable object into the specifically prepared wound bed and for introduction of the deformable object.

First claim

What is claimed is:

1. A cornea insertion device comprising a handle connected to a guide assembly, the guide assembly comprising:
(i) two prongs that assist in folding a cornea replacement lenticule into a desired shape, wherein the handle comprises a cylindrical hole that serves as a track for the prongs;
(ii) a suction shell positioned under the prongs, the shell comprising a suction line attached to a top portion thereof, allowing for the lenticule to be held in a desired form, positioned in the eye, and then released; and
(iii) a curved guide positioned under the shell, the guide having an arc for folding the lenticule over the top portion for guiding insertion of the lenticule into a recipient bed;
wherein the insertion device conforms a corneal replacement lenticule into a shape of a smaller arc diameter to fit into a cornea recipient bed and places a lenticule skirt into a stromal pocket encircling the recipient bed.

2. The cornea insertion device of claim 1 , wherein the curved guide allows folding of the lenticule such that the arc diameter is less than the arc diameter of the superficial aspect of the recipient bed.

3. A kit comprising the cornea insertion device of claim 1 .

4. The kit of claim 3 , further comprising one or more of:
i) a cornea replacement lenticule;
ii) an air insufflation needle;
iii) an encircling skirt;
iv) a guide for guiding insertion of a lenticule into a recipient bed;
v) a suction device;
vi) a conforming shell;
vii) a forceps; and/or
viii) a reverse forceps.

5. A method of replacing a cornea comprising:
(a) removing native cornea tissue, thereby creating a recipient bed for a replacement cornea;
(b) creating a stromal pocket encircling the recipient bed;
(c) inserting a corneal replacement lenticule into the recipient bed and stromal pocket using a cornea insertion device of claim 1 , wherein the lenticule has an arc diameter that exceeds the diameter of the recipient bed, and wherein the insertion device allows folding of the lenticule such that the arc diameter is less than the diameter of the superficial aspect of the recipient bed and facilitates insertion of the corneal lenticule into the stromal pocket encircling the recipient bed.

6. The method of claim 5 , wherein after step a) the majority of a recipient's corneal stroma has been removed.

7. The method of claim 5 , wherein after step a) only Descemet's membrane and its associated endothelium remains.

8. The method of claim 5 , wherein after step a) the entire thickness of a recipient's cornea has been removed.

9. The method of claim 5 , wherein the method is performed without sutures.

10. A cornea insertion device comprising a handle connected to a guide assembly, the guide assembly comprising:
(i) two prongs that assist in folding a cornea replacement lenticule into a desired shape, wherein the handle comprises a cylindrical hole that serves as a track for the prongs;
(ii) a suction shell positioned under the prongs, the shell comprising a suction line attached to a top portion thereof, wherein the suction shell is in the shape of an ellipsoid or a tulip having four nodes, allowing for the lenticule to be held in a desired form, positioned in the eye, and then released; and
(iii) a curved guide positioned under the shell, the guide having an arc for folding the lenticule over the top portion for guiding insertion of the lenticule into a recipient bed;
wherein the insertion device conforms a corneal replacement lenticule into a shape of a smaller arc diameter to fit into a cornea recipient bed and places a lenticule skirt into a stromal pocket encircling the recipient bed.

Assignees

• Univ California

Inventors

• Murphy Christopher J
• Wisner Erik R
• Mannis Mark
• Doval John H
• Murphy Kaitlin

Classifications

• A61F2/14

  Eye parts, e.g. lenses or corneal implants; Artificial eyes · CPC title

• A61F2/142

  Cornea, e.g. artificial corneae, keratoprostheses or corneal implants for repair of defective corneal tissue · CPC title

• A61F9/007 Primary

  Methods or devices for eye surgery · CPC title