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Updated: Feb 25, 2026
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Transcanalicular Diode Laser-assisted Dacryocystorhinostomy for the Treatment of Primary Acquired Nasolacrimal Duct Obstruction
Published on: October 13, 2017
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Learning Curve for Endoscopic Endonasal Dacryocystorhinostomy
Jong Joo Lee1, Han Min Lee1, Hyung Bin Lim1,2
1Department of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Korea.
Korean Journal of Ophthalmology : KJO
|July 29, 2017
Summary
Surgeons achieve stable surgical skill in endoscopic endonasal dacryocystorhinostomy (EE-DCR) after performing approximately 30 procedures. This learning curve analysis demonstrates improved success rates post-30 cases for EE-DCR.
Area of Science:
- Ophthalmology
- Surgical Education
Background:
- Endoscopic endonasal dacryocystorhinostomy (EE-DCR) is a common surgical procedure for nasolacrimal duct obstruction.
- Understanding the learning curve is crucial for optimizing surgical training and patient outcomes.
Purpose of the Study:
- To determine the learning curve for endoscopic endonasal dacryocystorhinostomy (EE-DCR).
- To evaluate the impact of surgical experience on EE-DCR success rates across multiple surgeons and institutions.
Main Methods:
- Retrospective review of 386 EE-DCR procedures performed by three surgeons at three tertiary hospitals.
- Patients were grouped by cumulative surgical experience (20, 30, 40, 50 eyes) to analyze success rates.
- Success defined by postoperative observation >6 months.
Main Results:
- Overall EE-DCR success rate was 86.3%.
- All surgeons demonstrated a significant improvement in success rates after completing their first 30 procedures (p < 0.05).
- Excluding the initial 30 cases, the overall success rate increased to 92.9%, with individual surgeon rates exceeding 90%.
Conclusions:
- A minimum of 30 EE-DCR procedures is recommended for surgeons to achieve stable surgical proficiency.
- This threshold indicates a critical point for skill acquisition in EE-DCR.
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