Cataract posterior/wedge chopper
Disclosed here is an apparatus and method for cataract surgery. The apparatus is an instrument referred to as a chopper that allows the reduction or elimination of ultrasound and/or laser energy introduced into the eye during cataract surgery. The chopper instrument is bent at an angle, such as an angle less than 110 degrees or less than 90 degrees, to provide a posterior (to anterior) chopping, and a wedge compression of the cataract. The bend in the chopper instrument, among other features, introduces refined vector forces that help in breaking/chopping the cataract with ease. The apparatus allows laser free/ultrasound free cataract extraction in dense cataracts. The chopper apparatus, a vacuum-tip and the proper vacuum settings, when used for performing a cataract surgery by a surgeon, allows the surgeon to break up the nucleus into small enough fragments that a true ultrasound-free/laser-free small incision cataract surgery can be accomplished with ease.
1. A chopper apparatus for performing a cataract surgery, the apparatus comprising:
a chopping member that is elongated and bent near a distal end of the chopping member, the chopping member comprising:
a wedge portion comprising a bend in the chopping member,
an arm portion extending proximally from a first side of the wedge portion of the chopping member, the arm portion terminating in a handle portion configured to be held by a user when performing the cataract surgery on a patient,
a forearm portion extending proximally from a second side of the wedge portion of the chopping member, the forearm terminating at the distal end of the chopping member, the distal end being configured to be placed into an eye of the patient by the user when performing the cataract surgery,
a wedge paddle formed at the wedge portion of the chopping member, the wedge paddle extending laterally on either side of the chopping member to form a scoop design for scooping a cataract in the eye of the patient,
wherein the wedge paddle extends along the forearm portion of the chopping member to the distal end of the chopping member, the wedge paddle increasing a surface area of the forearm portion, and
wherein the bend of the wedge portion comprises an angle of 110 degrees or less between the arm portion and the forearm portion of the chopping member.
2. The chopper apparatus of claim 1 , wherein the distal end of the chopping member comprises a blunt rounded tip.
3. The chopper apparatus of claim 1 , further comprising:
an inside edge at the wedge portion of the chopping member, the inside edge extending on either side of the wedge portion along the arm portion and the forearm portion of the chopping member, the inside edge facing into the bend of the chopping member; and
an outside surface of the chopping member extending along the arm portion, forearm portion, and wedge portion that is smooth and faces outward from the bend of the chopper member.
4. The chopper apparatus of claim 3 , wherein the inside edge is a sharp edge for cutting tissue in the eye of the patient.
5. The chopper apparatus of claim 3 , wherein the inside edge is a sharp edge, and the outside surface is a rounded surface, the sharp edge extending from the rounded surface to form a continuous line.
6. The chopper apparatus of claim 3 , wherein the distal end of the forearm portion is a blunt end, and wherein the inside edge extends the length of the forearm portion to the blunt end of the forearm portion.
7. The chopper apparatus of claim 1 , wherein the bend of the wedge portion comprises an angle of 90 degrees or less between the arm portion and the forearm portion of the chopping member.
8. The chopper apparatus of claim 1 , wherein the bend of the wedge portion comprises an angle of 70 degrees or less between the arm portion and the forearm portion of the chopping member.
9. The chopper apparatus of claim 1 , wherein the wedge paddle includes at least a sharp edge.
10. The chopper apparatus of claim 1 , wherein the wedge paddle includes at least a smooth edge.
11. A method for performing the cataract surgery using the chopper apparatus of claim 1 , the method comprising:
placing the chopper apparatus into the eye of the patient to access the cataract;
rotating the chopper apparatus such that a tip of the chopper apparatus at the distal end of the chopping member points toward a posterior pole of the cataract;
positioning the chopper apparatus around a nucleus of the cataract such that an equator of the nucleus of the cataract is straddled at the bend in the chopping member; and
fragmenting the nucleus of the cataract into a plurality of fragments for removal from the eye with a vacuum tip positioned near an anterior surface of the nucleus of the cataract.
12. A chopper apparatus for performing a cataract surgery, the apparatus comprising:
a chopping member that is elongated and bent near a distal end of the chopping member, the chopping member comprising:
a wedge portion comprising a bend in the chopping member,
an arm portion extending proximally from a first side of the wedge portion of the chopping member, the arm portion terminating in a handle portion configured to be held by a user when performing the cataract surgery on a patient,
a forearm portion extending proximally from a second side of the wedge portion of the chopping member, the forearm terminating at the distal end of the chopping member, the distal end being configured to be placed into an eye of the patient by the user when performing the cataract surgery,
a wedge paddle formed at the wedge portion of the chopping member, the wedge paddle extending laterally on either side of the chopping member to form a scoop design for scooping a cataract in the eye of the patient,
wherein the wedge paddle extends along part of the arm portion of the chopping member, the wedge paddle increasing a surface area of the arm portion, and
wherein the bend of the wedge portion comprises an angle of 110 degrees or less between the arm portion and the forearm portion of the chopping member.
13. The chopper apparatus of claim 12 , further comprising:
an inside edge at the wedge portion of the chopping member, the inside edge extending on either side of the wedge portion along the arm portion and the forearm portion of the chopping member, the inside edge facing into the bend of the chopping member; and
an outside surface of the chopping member extending along the arm portion, forearm portion, and wedge portion that is smooth and faces outward from the bend of the chopper member.
14. The chopper apparatus of claim 13 , wherein the inside edge is a sharp edge, and the outside surface is a rounded surface, the sharp edge extending from the rounded surface to form a continuous line.
15. The chopper apparatus of claim 12 , wherein the wedge paddle includes at least a sharp edge.
16. The chopper apparatus of claim 12 , wherein the wedge paddle includes at least a smooth edge.
17. A chopper apparatus for performing a cataract surgery, the apparatus comprising:
a chopping member that is elongated and bent near a distal end of the chopping member, the chopping member comprising:
a wedge portion comprising a bend in the chopping member,
an arm portion extending proximally from a first side of the wedge portion of the chopping member, the arm portion terminating in a handle portion configured to be held by a user when performing the cataract surgery on a patient,
a forearm portion extending proximally from a second side of the wedge portion of the chopping member, the forearm terminating at the distal end of the chopping member, the distal end being configured to be placed into an eye of the patient by the user when performing the cataract surgery,
a wedge paddle formed at the wedge portion of the chopping member, the wedge paddle extending laterally on either side of the chopping member to form a scoop design for scooping a cataract in the eye of the patient,
wherein the wedge paddle extends along both the forearm portion of the chopping member and the arm portion of the chopping member, the wedge paddle increasing a surface area of the arm and forearm portions, and
wherein the bend of the wedge portion comprises an angle of 110 degrees or less between the arm portion and the forearm portion of the chopping member.
18. The chopper apparatus of claim 17 , further comprising:
an inside edge at the wedge portion of the chopping member, the inside edge extending on either side of the wedge portion along the arm portion and the forearm portion of the chopping member, the inside edge facing into the bend of the chopping member; and
an outside surface of the chopping member extending along the arm portion, forearm portion, and wedge portion that is smooth and faces outward from the bend of the chopper member.
19. The chopper apparatus of claim 17 , wherein the wedge paddle includes at least a sharp edge.
20. The chopper apparatus of claim 17 , wherein the wedge paddle includes at least a smooth edge.