Department of Ophthalmology, North Eastern Indira Gandhi Regional Institute of Health and Medical Science (NEIGRIHMS), Shillong, Meghalaya, India.
Indian J Ophthalmol. 2022 Apr;70(4):1321-1326. doi: 10.4103/ijo.IJO_2399_21.
The aim of this study was to evaluate the outcomes of a simplified, fixed surgical dosage calculation for uncomplicated, horizontal, concomitant strabismus in adults.
Outcomes analysis of a fixed-dose calculation method for uncomplicated, horizontal, concomitant strabismus in adults (≥18 years) wherein 1-mm recession/resection equals 2 PD for lateral rectus and 3 PD for medial rectus. This was a retrospective case series.
The mean age of the patients was 28.50 ± 8.43 years, the mean amount of preoperative deviation was 35.16 ± 9.97 PD, the mean expected correction was 36.26 ± 9.49 PD, and the mean correction achieved was 35.92 ± 10.74 PD. There were 22 monocular exotropias, six monocular esotropias, eight alternate divergent squints, and two alternate convergent squints. There were 20 cases of sensory strabismus (54.28%). There was no statistically significant difference between the expected correction and correction achieved (P = 0.519), meaning that our fixed-dose calculation method was effective. Thirty-five out of 38 patients had successful outcomes as per our criteria of less than 10-PD deviations from straight in primary position. Therefore, the success rate achieved by this procedure was 92.10%. There was no statistically significant correlation between age and the amount of deviation (P = 0.611).
Our case series had a high postoperative success rate in terms of motor alignment. It is hoped that this simplified, fixed-dosage calculation method would help the numerous novice strabismus surgeons, make their starting steps easier and give them the confidence to do strabismus surgeries. They can modify the dosages later as per their own experiences.
本研究旨在评估简化的固定手术剂量计算在成人单纯性、水平性、共同性斜视中的疗效。
对成人（≥18 岁）单纯性、水平性、共同性斜视采用固定剂量计算方法的结果进行分析，即外侧直肌每 1mm 后退/截除等于 2PD，内侧直肌每 3PD。这是一项回顾性病例系列研究。
患者的平均年龄为 28.50±8.43 岁，术前偏斜均值为 35.16±9.97PD，预期矫正均值为 36.26±9.49PD，实际矫正均值为 35.92±10.74PD。其中 22 例为单眼外斜视，6 例为单眼内斜视，8 例为交替性外斜视，2 例为交替性内斜视。20 例（54.28%）存在斜视性弱视。预期矫正与实际矫正之间无统计学差异（P=0.519），说明我们的固定剂量计算方法是有效的。根据我们的标准，即第一眼位偏斜小于 10PD 为手术成功，38 例患者中有 35 例达到了成功。因此，该手术的成功率为 92.10%。年龄与偏斜量之间无统计学相关性（P=0.611）。
我们的病例系列在运动矫正方面有很高的术后成功率。我们希望这种简化的、固定剂量的计算方法能够帮助众多的斜视新手医生，使他们更容易迈出第一步，并使他们有信心进行斜视手术。他们可以根据自己的经验以后再修改剂量。
