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Purpose <p>To evaluate orbicularis oculi muscle function using electromyography in patients who developed recurrent epiphora and membranous neo-ostium obstruction after endonasal dacryocystorhinostomy (END-DCR) with documented initial patency and symptom improvement.</p> Methods <p>Nineteen patients who underwent at least two END-DCR procedures on the same eye and later developed recurrent epiphora were included. Orbicularis oculi muscle activity was assessed using quantitative electromyography. Electrophysiological findings of the operated side were compared with the asymptomatic contralateral side and with healthy controls.</p> Results <p>Motor unit potential (MUP) duration and amplitude were significantly increased on the operated side compared with both the asymptomatic side and the control group, consistent with neurogenic changes. No significant differences were observed between the asymptomatic side and controls.</p> Conclusion <p>Despite the limited number of patients, the rarity and homogeneity of this clinical subgroup allowed detection of consistent and statistically robust electrophysiological differences. These findings provide preliminary evidence that orbicularis oculi dysfunction may contribute to recurrent failure after END-DCR with documented initial neo-ostium patency.</p>

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Electromyographic findings of the orbicularis oculi muscle in recurrent endonasal dacryocystorhinostomy failure

  • 期刊论文

  • 发表日期：

    2026年4月29日

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  • O. Yagiz Agayarov,
  • I. B. Arslan,
  • A. Coban Taskin,
  • E. Boluk,
  • S. Bilgin,
  • S. E. Karakurt,
  • U. Sener,
  • I. Cukurova

摘要

Purpose

To evaluate orbicularis oculi muscle function using electromyography in patients who developed recurrent epiphora and membranous neo-ostium obstruction after endonasal dacryocystorhinostomy (END-DCR) with documented initial patency and symptom improvement.

Methods

Nineteen patients who underwent at least two END-DCR procedures on the same eye and later developed recurrent epiphora were included. Orbicularis oculi muscle activity was assessed using quantitative electromyography. Electrophysiological findings of the operated side were compared with the asymptomatic contralateral side and with healthy controls.

Results

Motor unit potential (MUP) duration and amplitude were significantly increased on the operated side compared with both the asymptomatic side and the control group, consistent with neurogenic changes. No significant differences were observed between the asymptomatic side and controls.

Conclusion

Despite the limited number of patients, the rarity and homogeneity of this clinical subgroup allowed detection of consistent and statistically robust electrophysiological differences. These findings provide preliminary evidence that orbicularis oculi dysfunction may contribute to recurrent failure after END-DCR with documented initial neo-ostium patency.