Attaining the optimal flange technique for transscleral capsular bag stabilization using iris hooks
Andreas Schlatter1, Martin Kronschläger, Manuel Ruiss
1From the Vienna Institute for Research in Ocular Surgery (VIROS), Karl Landsteiner Institute, Hanusch Hospital, Vienna, Austria (Schlatter, Kronschläger, Ruiss, Bayer, Findl); Ludwig Boltzmann Institute of Osteology at the Hanusch Hospital of ÖGK and AUVA Trauma Centre Meidling, 1st Medical Department, Hanusch Hospital, Vienna, Austria (Blouin).
Purpose:
To investigate the flange properties of different iris hooks.
Setting:
Vienna Institute for Research in Ocular Surgery (VIROS), Hanusch Hospital, Vienna, Austria.
Design:
Laboratory study.
Methods:
The flanging properties of 4 different iris hooks made from polypropylene (PP), elastic polymer (EP), and nylon were investigated with different heating distances and both with and without forceps gripping. The maximum diameter of the flanges was measured, and the shape of the flanges was evaluated.
Results:
Although both nylon and EP iris hooks had too small flange diameters for intrascleral fixation, PP iris hooks had a sufficient flange diameter (>330 μm) and mushroom-like shape. Furthermore, in PP hooks, heating distance was directly proportional to flange diameter.
Conclusions:
The findings of this study suggest that only PP iris hooks are suitable for flanged intrascleral fixation, which is off-label, to secure adequate fixation.
