Comparison of INTREPID® balanced and hybrid tips on anterior capsule rupture in ex vivo porcine eyes

Phacoemulsification has emerged as the global standard for cataract surgery, and various novel methods, tools, and agents have promoted surgical efficiency and reduced complications. Conventionally, the phaco tip, which cleaves and aspirates the cataractous lens, has been mainly constructed of metal...

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Bibliographic Details
Published in:	PloS one Vol. 18; no. 8; p. e0290657
Main Authors:	Ichikawa, Kei, Tanaka, Yoshiki, Tokiwa, Seiji, Naito, Airi, Hidaka, Yuji, Ichikawa, Reiko, Ichikawa, Kazuo, Yamamoto, Naoki
Format:	Journal Article
Language:	English
Published:	San Francisco Public Library of Science 29-08-2023 Public Library of Science (PLoS)
Subjects:	Biology and Life Sciences Care and treatment Cataract Cataracts Comparative analysis Complications Engineering and Technology Eye surgery Health aspects Health risks Intraocular pressure Laboratories Medicine and Health Sciences Methods Ophthalmology Patient outcomes Pharmaceutical industry Physical Sciences Polymers Risk Rupture Surgery Swine Ultrasonic imaging Japan United States
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Summary:	Phacoemulsification has emerged as the global standard for cataract surgery, and various novel methods, tools, and agents have promoted surgical efficiency and reduced complications. Conventionally, the phaco tip, which cleaves and aspirates the cataractous lens, has been mainly constructed of metal. In this study, the risk of anterior capsule rupture was evaluated under conditions of different power modes, longitudinal (Mode-L), torsional (Mode-T), or both (Mode-LT), and different aspiration powers (0 or 200 mmHg), using a traditional metal phaco tip (Group-M) or a new phaco tip with a high-strength polymer overmold on the needle edge (Group-P), which was developed to reduce the risk of capsule rupture. One hundred twenty porcine eyes were used for experiments within a setting of typical human physiological intraocular pressure. We found that Group-M showed capsule rupture with a smaller ultrasound power than did Group-P, regardless of power mode or aspiration power. In Group-M, there was no significant difference in risk of capsule rupture among power modes, however in Group-P, capsule rupture was least likely to occur with Mode-T. These results provide useful information for inexperienced ophthalmologists to improve surgical safety.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Competing Interests: Kazuo Ichikawa owns shares or holdings (Santen Pharmaceutical Co., Ltd., STAAR Surgical, Alcon Inc.), and has received research grants, travel grants and honoraria for speaking or participation at meetings from Alcon Japan Ltd. This does not alter our adherence to PLOS ONE policies on sharing data and materials.
ISSN:	1932-6203 1932-6203
DOI:	10.1371/journal.pone.0290657