Journal of the Mechanical Behavior of Biomedical Materials ( IF 3.9 ) Pub Date : 2021-08-30 , DOI: 10.1016/j.jmbbm.2021.104793 I Cabeza-Gil 1 , I Ríos-Ruiz 1 , B Calvo 2
The process of intraocular lens (IOL) delivery within the capsular bag during cataract surgery is crucial, as the integrity of the IOL, the injector and the ocular structures should be preserved at all times. This study aims to obtain the main parameters that affect the injection force exerted in the ejection of an intraocular lens (IOL) through syringe-type injectors. For that purpose, ejection tests were carried out in vitro, measuring the resistance force throughout the entire delivery process. The effect of IOL material, haptic design, IOL thickest area and ophthalmic viscosurgical device (OVD) was studied by ejecting seven IOLs with four syringe-type injectors of different sizes, 3.0, 2.2 and 1.8 mm. In all injectors, plate hydrophilic IOLs present the lowest resistance forces; hydrated C-loop hydrophobic IOLs present higher forces and the C-loop hydrophobic IOL in dry conditions presents the highest resistance forces. All IOLs could be properly delivered with an injector size of 2.2 mm, making injector sizes of 3.0 mm outdated. The injector size of 1.8 mm damaged several IOLs. IOL material and cartridge nozzle size were the most influential parameters in IOL delivery. IOL thickest area was also relevant but in a lesser extent whereas IOL haptic design was not as relevant.
中文翻译:
注射器型注射器在人工晶状体输送中施加的注射力的实验评估
白内障手术期间人工晶状体 (IOL) 在囊袋内的输送过程至关重要,因为应始终保持 IOL、注射器和眼部结构的完整性。本研究旨在获得影响通过注射器式注射器弹出人工晶状体 (IOL) 时施加的注射力的主要参数。为此,在体外进行了弹射测试,测量了整个分娩过程中的阻力。通过使用四个不同尺寸(3.0、2.2 和 1.8 毫米)的注射器式注射器喷射七个 IOL,研究 IOL 材料、触觉设计、IOL 最厚区域和眼科粘连手术装置 (OVD) 的影响。在所有注射器中,亲水平板人工晶状体的阻力最低;水合的 C 环疏水性人工晶状体呈现更高的力,而干燥条件下的 C 环疏水性人工晶状体呈现最高的阻力。所有人工晶状体都可以使用 2.2 毫米的注射器尺寸正确交付,这使得 3.0 毫米的注射器尺寸已经过时。1.8 毫米的注射器尺寸损坏了几个人工晶状体。IOL 材料和墨盒喷嘴尺寸是 IOL 输送中最有影响的参数。IOL 最厚区域也是相关的,但程度较小,而 IOL 触觉设计则不相关。