Pupil expander and method of using the same

A - Human Necessities – 61 – F

Patent

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Details

A61F 9/007 (2006.01) A61F 2/14 (2006.01)

Patent

CA 2177686

A pupil expander (10) has am elongated plastic resilient hollow ring (12) which is C-shaped in cross section, and formed into a partial circle. The ends (14, 16) of the ring member (12) have perforated tabs (18, 20 22) thereon, and are connected together by a strap (24). The pupil expander is compressed into am elongated shape. Forcep tips (42) are inserted into the ends of the ring member (12) to hold the ring member (12) during insertion of the expander (10) into the anterior chamber (48) of the eye through an incision (44) in the eye outside the location of the iris (50). An elongated tool (60) cam be inserted into the eye if required to facilitate the engagement of the ring member (12) with the iris (50). The ring member (12) is allowed to gradually expand and engage the inner periphery of the iris (50) and to be received within an elongated outer peripheral opening (26) in the ring member (12) as the forcep tips (42) are gradually withdrawn. The pupil expander (10) is removed from the eye by cutting the strap (24) adjacent one of the tabs (18, 20), grasping the tab (18, 20) adjacent the cut, and longitudinal pulling the expander (10) through the incision (44) through which it was inserted.

Dilatateur de pupille (10) possédant un anneau (12) allongé, élastique et creux en plastique, dont la section transversale présente la forme d'un C, et partiellement circulaire. Les extrémités (14, 16) de l'anneau (12) sont pourvues de languettes perforées (18, 20, 22) et sont reliées par une lanière (24). On comprime le dilatateur afin qu'il prenne une forme allongée. On introduit les pointes (42) s'une pince dans les extrémités de l'anneau (12), afin de le maintenir pendant l'insertion du dilatateur (10) dans la partie antérieure (48) de l'oeil par une incision (44) pratiquée dans l'oeil hors de l'emplacement de l'iris (50). On peut introduire dans l'oeil un instrument allongé (60), si nécessaire afin de faciliter le contact de l'anneau (12) avec l'iris (50). On laisse l'anneau (12) se dilater progressivement et venir en contact avec la périphérie intérieure de l'iris (50) qui s'introduit dans une ouverture (26) périphérique, extérieure et allongée de l'anneau (12) simultanément au retrait progressif des extrémités (42) de la pince. On retire le dilatateur de pupille (10) de l'oeil en coupant la lanière (24) contiguë à l'une des languettes (18, 20), on saisit la languette (18, 20) contiguë à la coupure et on retire le dilatateur (10) à travers l'incision (44) par laquelle on l'a introduit.

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