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

Kei Ichikawa, Yoshiki Tanaka, Seiji Tokiwa, Airi Naito, Yuji Hidaka, Reiko Ichikawa, Kazuo Ichikawa, Naoki Yamamoto

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article numbere0290657
JournalPloS one
Issue number8 August
Publication statusPublished - 08-2023

All Science Journal Classification (ASJC) codes

  • General


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