Brandl H, Hindelang F, Hardt F J, Fath H
Flugmedizinisches Institut der Luftwaffe, Fürstenfeldbruck.
Ophthalmologe. 1993 Aug;90(4):376-9.
The ECCE technique often requires additional removal of lens residues remaining attached to the capsular bag after lens nucleus extraction. These residual lens substances in the form of a visco-elastic fluid are detached and removed by means of various types of irrigation-aspiration cannulas. During the aspiration process the elastic properties of the fluid are utilized. The aim of the investigations presented was modification and optimization of the geometric design of the irrigation-aspiration cannulas to improve the flow efficiency, facilitate the detachment and reduce the amount of rinsing fluid required. The fluid mechanic properties of various type of irrigation-aspiration cannulas were investigated and compared in an eye model. Some of the commercially available irrigation-aspiration cannulas give good results, being convenient to handle and functional. Our experimental data indicate that canalization of the rinsing fluids and the special location of the irrigation-aspiration openings will improve the flow-field. An adjustable valve has been developed, which enables safe aspiration/irrigation changeover if it should be necessary. Two models of the newly designed irrigation-aspiration probes are presented and discussed.
囊外白内障摘除术（ECCE）通常需要在晶状体核摘除后额外清除附着在囊袋上的晶状体残留物。这些呈粘弹性流体形式的残留晶状体物质通过各种类型的灌注-抽吸套管进行分离和清除。在抽吸过程中，利用了流体的弹性特性。本文所呈现的研究目的是对灌注-抽吸套管的几何设计进行改进和优化，以提高流动效率、便于分离并减少所需的冲洗液量。在眼模型中研究并比较了各种类型灌注-抽吸套管的流体力学特性。一些市售的灌注-抽吸套管效果良好，操作方便且功能齐全。我们的实验数据表明，冲洗液的管道化以及灌注-抽吸开口的特殊位置将改善流场。已开发出一种可调节阀门，如有必要，可实现安全的抽吸/灌注转换。介绍并讨论了新设计的灌注-抽吸探头的两种型号。
