The Effect of Slanted Recession of Horizontal Muscle on Horizontal Strabismus With Abnormal Accommodative Convergence /Accommodation Ratio (AC/A)
试验速览
- 阶段
- 2 期
- 入组人数
- 100
- 试验地点
- 1
- 主要终点
- far-near deviation difference
研究概览
简要总结
Different methods was tried to treat high AC/A strabismus cases;such as prescription of bifocal glasses in esotropia,recession of horizontal muscles with posterior fixation sutures,more recession than needed for far deviation(augmented recession),recession and pulley fixation and slant recession.
Different results was reported for any type of above methods. In recent studies,slanted recession was applied for high AC/A in esotropic cases and success rate of 67% was reported.but there was no unanimity for procedure of choice.
Since slant recession method is simpler and has low side effect than the other methods,therefore in this study the investigators want to peruse the outcome of this method on high AC/A horizontal strabismus.
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
- Double (Participant, Care Provider)
入排标准
- 年龄范围
- 6 Years 至 80 Years（Child, Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •all patients with horizontal strabismus that the different between far deviation and near deviation is more than 10 pd
排除标准
- •all patients who had history of surgery on horizontal muscles and patients with pseudo high AC/A ratio.
研究组 & 干预措施
conducting the slanted recession technique
conducting the slanted recession technique on the superior and inferior poles of the muscle based on far and near deviations.
干预措施: conducting the slanted recession technique on the superior and inferior poles (Procedure)
conducting the augmented recession technique on the muscle
conducting the augmented recession technique on the muscle for 1 to 1.50 mm more compared with the standard method.
干预措施: conducting the augmented recession technique on the muscle (Procedure)
结局指标
主要结局
far-near deviation difference
时间窗: 90 days after surgery
difference between the far and near deviations
次要结局
- success rate of surgery(90 days after surgery)
研究者
Zahra Rabbani Khah
Clinical Professor
Shahid Beheshti University of Medical Sciences