A Randomised Trial of Torsional Ultrasound Versus Longitudinal Ultrasound During Phacoemulsification of Age-related Cataracts: Comparison of Intra-operative Performance and Impact on Post-operative Endothelium Integrity
试验速览
- 阶段
- 4 期
- 状态
- 已完成
- 发起方
- 入组人数
- 360
- 试验地点
- 2
- 主要终点
- Intra-operative complications, surgical clock time in minutes (SCT), fluid volume in ml(FV), and central corneal thickness in µm (CCT) on day 1 and months 1 and 3, and endothelial cell density (ECD) at 3 months.
研究概览
简要总结
To determine the differences in intra-operative complications, surgical duration, fluid usage, corneal thickness and endothelium cell density in eyes undergoing microcoaxial phacoemulsification (MCP) either with Torsional or longitudinal ultrasound during the surgery and at post-operative day 1, 1 month and 3 months.
详细描述
Introduced in mid 2006, torsional ultrasound (OZil, Infiniti Vision System, Alcon Laboratories, Texas, USA) uses rotational oscillations at ultrasonic frequencies to emulsify cataractous lens material in a seamless cutting motion from a tip that oscillates laterally. The side-to-side movement of the phaco tip produces minimal repulsion of lens material from the phaco tip resulting in improved followability. Clinically this translates into more effective lens removal with torsional phaco in comparison to the conventional ultrasound mode.to test this in a clinical scenario we undertook this study.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Single (Outcomes Assessor)
入排标准
- 年龄范围
- 55 Years 至 75 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •patients 55 years and older with a senile cataract grades 1 to 5 nuclear sclerosis based on Emery's classification,
- •endothelial cell density > 1500 cells/mm2,
- •anterior chamber depth > 2.4 mm, and
- •a dilated pupil > 7 mm.
排除标准
- •eyes with pseudoexfoliation,
- •mature, traumatic, or complicated cataracts,
- •history of previous intra-ocular surgery, glaucoma, uveitis, and
- •patients who were unable to comply with follow-up examinations.
结局指标
主要结局
Intra-operative complications, surgical clock time in minutes (SCT), fluid volume in ml(FV), and central corneal thickness in µm (CCT) on day 1 and months 1 and 3, and endothelial cell density (ECD) at 3 months.
时间窗: 3 months post-operative
次要结局
未报告次要终点