Ostium shrinkage after endoscopic dacryocystorhinostomy

Area of Science:

• Ophthalmology
• Otolaryngology
• Surgical Outcomes

Background:

• Ostium closure is the primary cause of anatomical failure after endoscopic dacryocystorhinostomy (DCR).
• Understanding ostium size changes is crucial for improving DCR success rates.

Purpose of the Study:

• To evaluate changes in DCR ostium size over time.
• To determine the correlation between ostium size and surgical outcomes.

Main Methods:

• Prospective, nonrandomized, interventional case series of patients undergoing powered endonasal DCR.
• Ostium size was measured intraoperatively, at 4 weeks, and 12 months post-surgery.
• 161 patients with nasolacrimal duct or canalicular obstruction were included.

Main Results:

• Significant ostial shrinkage observed: 50% by 4 weeks and an additional 15% by 12 months.
• The final ostium size averaged 35% of the original size at 12 months.
• Intraoperative and postoperative ostium sizes were positively correlated, but ostial size did not predict patency or symptom resolution.

Conclusions:

• Endoscopic DCR ostium undergoes significant shrinkage, primarily within the first 4 weeks post-surgery.
• Ostium size at 12 months is approximately 35% of the initial size.
• Ostium size is not a reliable predictor of the overall success of endoscopic DCR.