Artikel
Resistance force for intraocular lens insertion through syringe-type injectors
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Veröffentlicht: | 14. Mai 2019 |
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Gliederung
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Purpose: To measure and compare the resistance force for intraocular lens (IOL) insertion using syringe-type injector systems.
Methods: Intraocular lenses were inserted into the lens capsular bag of porcine eyes after phacoemulsification with three different preloaded implantation systems,RayOne, CT Lucia 601P – Accuject and AcrySof IQ – Ultrasert. For each system, the resistance force for the IOL insertion into the porcine capsules was measured using an automated force gauge system. As a control, the resistance force of the IOL delivery onto a plastic dish was measured. Changes in the resistance force as well as its curves and maximum values were evaluated. The mean total area under the curve (AUC) was also compared.
Results: Each implantation system demonstrated a characteristic maximum resistance force behavior unique to its own design. Maximum resistance forces in the pig eye and control group in Newton [N], as well as the total area under the curve forces in [N] in the pig-eye and control groups were different between the groups.
Conclusions: RayOne and ACCUJECT show very steep increases of force at the beginning followed by abrupt IOL release. In such situations, the resistance force is rapidly decreasing .Ultrasert shows relatively flat resistance force curve during the entire implantation process. All 3 injector systems show close results in AUC, which means they have similar results in terms of total resistance force. During cataract surgery, sudden IOL release or over-extension of the plunger tip may cause loss of control, resulting in potential damage for IOL or capsular bag.