Suitable 30 Gauge Thin-Wall Needles And 3-Piece Iols For Flanged Intrascleral Fixation
Published 2023 - 41st Congress of the ESCRS
Reference: FP29.08 | Type: Free paper | DOI: 10.82333/70av-9874
Authors: Spela Stunf Pukl* 1 , Martin Kronschlaeger 2 , Manuel Ruiss 2 , Stéphane Blouin 3 , Oliver Findl 2
1Vienna Institute for Research in Ocular Surgery (VIROS), A Karl Landsteiner Institute,Vienna,Austria;University Eye Hospital UKC,Ljubljana,Slovenia, 2Vienna Institute for Research in Ocular Surgery (VIROS), A Karl Landsteiner Institute,Vienna,Austria, 3Ludwig Boltzmann Institute of Osteology at the Hanusch Hospital of ÖGK and AUVA Trauma Centre Meidling,Vienna,Austria
Purpose
To microscopically analyse the diameters of different 30 gauge (G) thin-wall needles and different 3-piece intraocular lenses' (IOLs') haptics, which can be used for the flanged intrascleral fixation.
Setting
Methods
An upright light microscopy was used for imaging, measurements and analyisis of the 30G thin-wall needles and haptics of 3-piece IOLs. Namely, the inner and outer diameters of the needles and the end thickness of the haptics were assessed and compared for haptic end fitting into the needle lumen.
Results
Among the 5 different needles, the inner diameter of the T-lab was significantly wider of all (209.3±8.0µm, p<.001), followed by the TSK (194.8±5.0µm), the MST (194.7±5.8µm), the Sterimedix (187.5±9.0µm) and the significantly narrower Meso-relle (178.7±7.0µm, p<.05). The outer diameters were comparable, except from the significantly larger T-lab (316.0±2.0µm, p<.001).
Measuring the 5 different 3-piece IOLs’ haptics, the AvanseePresetKowa’s haptic was significantly thinner (127.2±0.7µm) than all the others, such as the TecnisZA900 Johnson&Johnson (143.5±3.1µm), the CTLucia 202 Zeiss (143.8±1.3µm), and the AcrysofMA60AC Alcon (143.9±1.4µm). While the SensarAR40 Johnson&Johnson’s haptic was significantly thicker of all (170.7±1.7µm, p<.001).
Conclusions
Most of the included IOLs' haptics would fit into most of the measured needles, with the exception of the Sensar AR40 haptics when in combination with the Meso-relle or the Sterimedix needles. The combination of a larger needle lumen and a thinner haptic could result in easier insertion during the surgery. When the exact dimensions of the needle and the IOL haptic used are unknown, we recommend trying insertion before the surgery.