Devices that expand the size of the pupil are indispensable in surgical cases requiring a dilated pupil. A dilated pupil allows for a capsulorrhexis that has an adequately sized opening and an enhanced opening of the pupil facilitates the safety and effectiveness of cataract surgery.
The most common pupil dilators are mechanical devices that are inserted within the central portion of the pupil to open the pupil. The most commonly used pupil dilators are the Malyugin ring (MST, Redmond, Washington) and the I-Ring (Beaver-Visitec, San Dimas, California). Washington). A multitude of other pupil dilators including iris hooks and Assia pupil expanders have external extensions.
The limitation for many types of pupil dilating devices is that they require specialized surgical skills and add significant operating time. In addition, many of these devices are cumbersome to insert and can actually inflict damage to important structures inside the eye when they are manipulated or removed from the eye at the conclusion of cataract surgery. Pupil dilators are known to potentially cause damage to the pupil, iris, and cornea. Sharp edges of some commercially available pupil expanding devices can result in tears of the pupil or iris. The inherent limitations of currently available mechanical pupil expanders may be overcome by the use of a simple pupil ring expander that is easy to insert and does not have focal points of sharp contact with the pupil.
The PDR may be inserted by means of a conventional sterile injector or forceps into the pupillary aperture. The PDR is loaded into the barrel of an injector. This step may be configured by the factory so that the ring is preloaded for use. The injector is inserted into an incision. A plunger activated by hand-control injects the ring into the pupillary space. The outer groove of the PDR engages the pupillary margin. The PDR is rotated circumferentially around the track formed by the edge of the pupil. As it rotates around the edge of the pupil, the PDR expands outwardly to widen the pupil. The PDR can be further manipulated into a position preferred by the surgeon by the use of a lens hook placed in one of five eyelets.
Removal of the PDR is accomplished by either forceps manual extraction, or preferably by the use of the same injector used to insert the PDR. A hook present on the plunger of the insertion instrument is used to engage an eyelet on one end of the ring. The ring is then retracted back into the barrel of the injector. Insertion and removal of the PDR is performed with the aid of a viscoelastic material to maintain the anterior chamber of the eye.
The key advantage of the PDR is that it is intuitive to apply and easy to apply. The favorable pricing point of the PDR adds to the profitability of surgery when compared to other commercially available devices. Many ophthalmic surgeons will also appreciate being able to perform small-pupil surgery at a faster clip with greater ease.
The PDR is offered in a package of six sterilized individual units that are clear in color. The cost is $1,250/package and $15.50 for two-day delivery. Satisfaction guaranteed! The PDR comes with a full 30-day money back guatantee.
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