| Clinical Effects of an Improved Pump Reaction Rate and Automatic Occlusion Sensing System in Phacoemulsification. |
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You Na Kim, Jin Ah Lee, Jae Yong Kim, Myoung Joon Kim, Hung Won Tchah |
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Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea. hwtchah@amc.seoul.kr |
| 수정체유화장치의 초음파 출력속도 및 자동막힘감지 기능 향상의 술 후 임상결과 비교 |
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김유나⋅이진아⋅김재용⋅김명준⋅차흥원 |
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울산대학교 의과대학 서울아산병원 안과학교실 |
Correspondence:
Hung Won Tchah,
Email: hwtchah@amc.seoul.kr
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Received: 14 February 2018 • Revised: 22 March 2018 • Accepted: 30 October 2018 |
| Abstract |
PURPOSE
A recently introduced phacoemulsification system, the WhiteStar Signature® PRO, has demonstrated improved nucleus followability and cutting efficiency via an improved pump regulator with a higher reaction response and an automatic occlusion sensing system. In this study, we compared various phacoemulsification parameters between the new system and an older version of the device. METHODS: A total of 80 eyes of 68 patients with cataracts who had undergone phacoemulsification by a single surgeon were included in this study. Forty eyes of patients underwent phacoemulsification using the older Signature® system (WhiteStar); these patients were classified as the control group. Another 40 eyes of patients underwent phacoemulsification with the newer enhanced system, the WhiteStar Signature® PRO; these patients were assigned to the experimental group. During the operation, operative parameters, including the effective phaco time (parameter of effective phaco time with a specific coefficient for the transversal movement expressed in seconds, EFX), ultrasound time (seconds [s]), effective phacoemulsification time (EPT, s), average phacoemulsification power (AVG, %), and balanced salt solution usage, were measured to determine the performance enhancement offered by the updated system. Central corneal thickness was measured before and after surgery to compare corneal edema. The relationships between the two groups were analyzed using an independent t-test. RESULTS: The Signature PRO® system showed a lower EFX (p < 0.001), a shorter EPT (p < 0.001), and a smaller AVG (p < 0.001). Postoperative corneal thickness did not differ significantly between the two groups. CONCLUSIONS: Comparing the efficacy of the improved reaction speed of the device and automatic occlusion sensing system in performing phacoemulsification, the updated Signature PRO® system demonstrated superior followability and cutting efficiency regardless of nuclear cataract hardness. |
| Key Words:
Automatic occlusion sensing;Central corneal thickness;Effective phacoemulsification time;Handpiece |
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