| The Change of Rectus Muscle Length Caused by Traction with Muscle Hooks in Strabismus Surgery: The Second Report. |
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Gang Seok Jeon, Dong Wook Kim, Mi Young Choi, Dong Gyu Choi |
1Department of Ophthalmology, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea. eyechoi@dreamwiz.com
2Department of Ophthalmology, Chungbuk National University College of Medicine, Chungbuk National University Medical Research Institute, Cheongju, Korea. |
| 사시수술 중 직근절제 시 근육훅의 견인으로 인한 수술량의 오차 – 제2보 |
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전강석1⋅김동욱1⋅최미영2⋅최동규1 |
Department of Ophthalmology, Kangnam Sacred Heart Hospital, Hallym University College of Medicine1, Seoul, Korea
Department of Ophthalmology, Chungbuk National University College of Medicine, Chungbuk National University Medical Research Institute2,
Cheongju, Korea |
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| Abstract |
PURPOSE
To investigate the influence of the change in medial rectus resection amount caused by traction with muscle hooks on surgical results in exotropia. METHODS: In this prospective study 38 exotropia patients underwent unilateral lateral rectus recession-medial rectus resection (R & R). After isolation of the medial rectus muscle, the length of the muscle was measured with a muscle hook, and the portion to be resected was marked using gentian violet stain with calipers. After the medial rectus was retracted with two muscle hooks in either direction, its length was measured again with the calipers. Group 1 includes the patients with the planned resection amount changed to a more 0.5-1.0 mm when the rectus muscle was retracted, while group 2 did not change with the second muscle hook. The surgical results were compared between the 2 groups at postoperative 6 months. RESULTS: Mean resection amount was changed from 5.07 +/- 0.76 mm to 5.36 +/- 0.73 mm after pulling the second muscle hook. Sixteen patients (42.1%) were included in group 1 and 22 patients (57.9%) in group 2. There was no significant statistical difference in mean preoperative and postoperative deviated angle between the two groups. Success rates defined as the ocular alignment within +/- 10 PD in the primary position at postoperative 6 months were 75.0% in group 1 and 86.3% in group 2, which is not stastistically different (p > 0.05). CONCLUSIONS: Medial rectus resection amounts can be changed with the muscle traction with two muscle hooks, which induced the planned amount of resection less than first measured resection amount. However, there was little influence on surgical outcomes from the change occurred to a maximum 1 mm in resection measurement due to traction with two muscle hooks. |
| Key Words:
Change of resection amount;Surgical result;Traction with muscle hook |
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