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Adhesion after Y-split procedure can affect its mechanism for treating overshoots in Duane’s syndrome

  • Neurophthalmology
  • Published:
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Abstract

Purpose

To investigate the extent of adhesion and changes in the Y configuration after the Y-split procedure, compared with the posterior fixation suture.

Methods

Twelve New Zealand white rabbits were included in the study. The 10-mm Y-split procedure was performed in the superior rectus muscle (SR) of one eye, and the 10-mm posterior fixation suture was made in the SR of the other eye. Six weeks after surgery, the Y arm lengths and lengths of adherence to the sclera were measured. If the adhesion involved the whole Y arm, the distance between the original SR insertion and most proximal part of the adhered SR was measured. In the eyes with posterior fixation suture, the distance between the SR insertion and most proximal part of the adhered SR was evaluated.

Results

The average nasal and temporal Y arm lengths were 6.37 ± 0.65 and 6.54 ± 0.63 mm, respectively, a significant decrease from those measured immediately after surgery (P = 0.002 and 0.002, respectively). Adhesions involved the entire Y arms in 11 of 12 SRs (91.7%), with an average adhesion length of 7.01 ± 1.04 mm. In SRs with posterior fixation sutures, the average adhesion was 9.18 ± 0.62 mm from the insertion, which was only 2.17 mm posterior to proximal portion of adhesion in Y-split SR (P < 0.001).

Conclusions

Healing process reduces the Y arm length. Adhesion may involve the entire Y arm and could weaken or alter the therapeutic mechanism after the Y-split procedure.

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Funding

This study was funded by a grant from Korea University (K1422451).

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Authors and Affiliations

  1. Department of Ophthalmology, Korea University College of Medicine, Seoul, South Korea

    Young Choi, Sungmin Jang, Soo Youn Choi, Seung-Hyun Kim & Young-Woo Suh

  2. Department of Ophthalmology, Korea University Ansan Hospital, 123, Jeokgeum-ro, Danwon-gu, Ansan-si, Gyeonggi-do, 15355, South Korea

    Young-Woo Suh

Authors
  1. Young Choi
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  2. Sungmin Jang
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  3. Soo Youn Choi
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  4. Seung-Hyun Kim
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Correspondence to Young-Woo Suh.

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The authors declare that they have no conflicts of interest.

Ethical approval

All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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Choi, Y., Jang, S., Choi, S.Y. et al. Adhesion after Y-split procedure can affect its mechanism for treating overshoots in Duane’s syndrome. Graefes Arch Clin Exp Ophthalmol 257, 391–395 (2019). https://doi.org/10.1007/s00417-018-4181-8

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  • DOI: https://doi.org/10.1007/s00417-018-4181-8

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