The effect of anterior transposition of the inferior oblique muscle in the treatment of severe superior oblique muscle palsy

Abstract

Introduction: Depending on the amount of deviation in the eye due to paralysis of the superior oblique muscle, various methods have been proposed for treatment. The most common intervention in patients with superior oblique muscle palsy is the weakness of the inferior oblique muscle Which is commonly done in 4 ways.1-myotomy 2- Myectomy3-Anterior transposition of inferior oblique muscle4-Recession of inferior oblique muscle. Some people believe that the effect of Anterior transposition of inferior oblique muscle is greater than other weakening methods. Aim: The effect of anterior transposition of the inferior oblique muscle in the treatment of severe superior oblique muscle palsy. Materials and Methods: In a Two sided blinded interventional study The target community of all patients with superior oblique muscle palsy was more than 20PD. At first, patients who were candidates for Anterior transposition of inferior oblique muscle treatment were selected. Before surgery, the degree of patient deviation was precisely calculated And compared with the amount of deviation in the eye after surgery. In this study, extortion measurements were performed in the eyes of patients before and after the operation by the Bagolini test And compared. Patients in this study were evaluated for age, sex, and etiology of the disease. Neck deviation was evaluated before and after surgery in patients In this study, the reduction in eye deviation was equal to or less than 4PD as a success. Patients entered the study under anterior transposition of inferior oblique muscle surgery. All patients had one surgeon. These patients are followed up regularly for at least 6 months after surgery And patients were followed up for possible complications The latest information was collected and analyzed Postoperative examinations were performed by someone else who was a blind and blind surgeon. Results: In the present study, 25 patients underwent anterior transposition of the inferior oblique muscle for the treatment of superior oblique muscle palsy. And after ( 14/02 +/- 13/03), the month of the post-operative follow up In terms of the success of surgery, 18 cases (72%) were successful and 7 cases (28%) did not succeed. The rate of torsion before surgery was (6.6 +/- 1/6), which was achieved after operation (1/44 +/- 1/63). Pre-operative superior oblique muscle under action was (1/25 +/- 0/67) And after the operation ( 0/08 +/- 0/28). The Pre-operative of inferior oblique muscle over action was (32.3 +/- 0/62PD) Which was obtained after surgery (0/12 +/- 0/33) The rate of preoperative hypertropia in adduction ( 35.3 +/- 0/ 8) which was postoperative(7 +/- 5/54). And preoperative hypertropia in primary position (27.6 +/- 3/26), which was obtained after surgery (4/72 +/- 5/66).