Method for removal of retained lens fragments using small diameter fragmatome

Abstract

A medical instrument is disclosed, comprising a tubular member with proximal and distal ends. The distal end of the tubular member provides an elongated section having a substantially constant outside diameter of no more than 23-gauge (about 0.57 mm). The tubular member is in energy communication with an emulsification energy source disposed to deliver emulsification energy at the distal end of the tubular member. The tubular member may also be in suction communication with a suction source disposed to deliver suction at the distal end of the tubular member. The medical instrument may be used in a method to remove lens fragments from the eye, through incisions in the eye that are small enough not to require suturing after the operation.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of, and priority to, U.S. provisional patent application No. 61 / 389,311 filed Oct. 4, 2010, the disclosure of which provisional application is incorporated herein by reference.[0002]This application is also a divisional application of U.S. patent application Ser. No. 13 / 106,478 filed May 12, 2011.BACKGROUND OF THE INVENTION[0003]The present invention generally relates to eye surgery, and more particularly relates to a method and an apparatus, advantageously a small-diameter fragmatome, for removing retained lens fragments in a minimally traumatic fashion.[0004]During cataract surgery, the natural lens may be removed from inside of the patient's eye. Conventional procedure for removal of the natural lens typically involves making a large (2.9 mm, or larger) incision into the eye and a second, smaller incision. Typically, two incisions are required to accommodate conventional instrumentation into the eye....

AI Technical Summary

Benefits of technology

[0018]It is therefore a technical advantage of the invention to enter the eye with a fragmatome capable of being inserted through incisions small enough not to require suturing after the operation. An exemplary application of such a fragmatome is in a method for removing lens tissue fragments from the vitreous cavity of the eye.

[0019]A further technical advantage of the invention is that trauma to the patient as a result of the operation is reduced, and recovery time is improved.

[0020]The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the

Problems solved by technology

If lens fragments, and especially portions of the center of the lens, also known as the nucleus or the nuclear lens, shift into the back or posterior chamber of the eye, those lens fragments may cause severe trauma (including inflammation and blindness) if left unremoved.

Relatively large incisions are suffered by the patient, requiring suturing.

A drawback to conventional removal of lens fragments from the back of the eye, as described above, is that conventional fragmatomes are comparatively large in design.

However, when lens fragments are left in the posterior eye cavity, removal of those fragments through those same small incisions is made difficult by the unavailability of a small gauge (23-gauge or less) fragmatome.

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