Ophthalmic knife and methods of use

Patent metadata

Field	Value
Publication number	US-10213342-B2
Application number	US-201615389328-A
Country	US
Kind code	B2
Filing date	Dec 22, 2016
Priority date	Dec 23, 2015
Publication date	Feb 26, 2019
Grant date	Feb 26, 2019

Abstract

The present invention relates to an ophthalmic knife and methods of its use for treatment of various conditions including eye diseases, such as glaucoma, using minimally invasive surgical techniques. The invention relates to a multi-blade device for cutting the tissues within the eye, for example, a trabecular meshwork (TM).

First claim

We claim:

1. An ophthalmic knife, comprising:
a shaft;
a first platform extending radially from a first radial side of the shaft; and
a second platform extending radially from a second radial side of the shaft, opposite the first radial side;
wherein each of the first and second platforms comprises:
a ramp that increases from a first thickness at a distal side of the ramp to a second thickness, greater than the first thickness and at a proximal side of the ramp; and
first and second blades that (i) are separated by a gap and (ii) extend from the proximal side of the ramp to the shaft; and

wherein the shaft, the first platform, and the second platform define a single flat and continuous bottom surface that is opposite each of the first and second blades.

2. The ophthalmic knife of claim 1 , wherein each ramp is wedge-shaped for elevating a portion of a trabecular meshwork away from an outer wall of a Schlemm's canal.

3. The ophthalmic knife of claim 1 , wherein each of the first and second platforms further comprises a top side and a bottom side, and the first thickness and the second thickness are each defined between the top side and the bottom side of the corresponding one of the first and second platforms.

4. The ophthalmic knife of claim 3 , wherein the bottom side of the first platform is coplanar with the bottom side of the second platform.

5. The ophthalmic knife of claim 1 , wherein each of the first and second platforms further comprises a first lateral side extending from the proximal side to the distal side and a second lateral side extending from the proximal side to the distal side.

6. The ophthalmic knife of claim 5 , wherein proximal segments of the first lateral side and the second lateral side are parallel to each other and distal segments of the first lateral side and the second lateral side intersect at a tip at the distal side.

7. The ophthalmic knife of claim 1 , wherein each of the first and second platforms is positioned at a fixed angle relative to the shaft.

8. The ophthalmic knife of claim 1 , wherein a bottom side of each of the first and second platforms is aligned with a terminal end of the shaft defining a portion of the bottom surface.

9. The ophthalmic knife of claim 1 , wherein each of the first and second platforms is positioned at a fixed angle relative to the shaft.

10. The ophthalmic knife of claim 1 , wherein the bottom side of each of the first and second platforms is aligned with a terminal end of the shaft defining a portion of the bottom surface.

11. An ophthalmic knife, comprising:
a shaft;
a first platform extending radially from a first radial side of the shaft; and
a second platform extending radially from a second radial side of the shaft, opposite the first radial side;
wherein each of the first and second platforms comprises:
a ramp having a proximal side, a distal side forming a tip, a top side, and a bottom side, wherein the ramp increases from a first thickness, defined between the top side and the bottom side and at the distal side of the ramp, to a second thickness, defined between the top side and the bottom side and at the proximal side of the ramp and being greater than the first thickness; and
first and second blades that (i) are separated by a gap and (ii) extend from the top side of the ramp to the shaft; and

wherein an end of the shaft, the bottom side of the first platform, and the bottom side of the second platform define a single planar bottom surface.

Assignees

• Univ Colorado Regents
• New World Medical Inc

Inventors

• Kahook Malik
• Mansour Khalid
• Abdullah Suhail
• Porteous Eric

Classifications

• A61B2017/320082

  for incising tissue · CPC title

• A61B17/3211

  Surgical scalpels, knives; Accessories therefor · CPC title

• A61B2217/005

  with suction drainage system · CPC title

• A61F9/0133 Primary

  Knives or scalpels specially adapted therefor · CPC title

• A61F9/00781 Primary

  Apparatus for modifying intraocular pressure, e.g. for glaucoma treatment (drainage implants in general A61M27/002) · CPC title