Objective: To compare the surgical outcomes of dacryocystorhinostomy with retrograde intubation and conjunctivo-dacryocystorhinostomy for the management of proximal mid-bicanalicular lacrimal obstruction.
Design: Randomized, controlled trial.
Methods: The study was conducted in 50 eyes of 50 adult patients with bicanalicular obstruction ≤ 6 mm from the punctum. The etiology, duration of symptoms, and Munk scores were recorded. Group A underwent dacryocystorhinostomy with retrograde intubation, and in group B, conjunctivo-dacryocystorhinostomy was performed. Success was defined as anatomic patency on syringing, a negative fluorescein dye disappearance test, and a Munk score < 2 twelve months postoperatively.
Results: There were 23 males and 27 females, 18-66 years of age, with a 6-month to 20-year duration of epiphora. The etiologies were idiopathic, trauma, and allergic conjunctivitis and ocular surface inflammation. In group A, the pseudopunctum was located medial to the diagnosed level of canalicular block by 1.28 ± 0.54 mm and 1.04 ± 0.88 mm in upper and lower canaliculi, respectively. Four post-traumatic cases required intervention following closure of the pseudopunctum, all being located ≥ 7 mm from the true punctum (p = 0.001). The complication rate was higher in group B than in group A (p = 0.001). At 12 months, the success rate was 100% in group A and 88% in group B (22 of 25; p = 0.74), with reduction in Munk scores from preoperative levels in both groups (p = 0.001).
Conclusion: Dacryocystorhinostomy with retrograde intubation and conjunctivo-dacryocystorhinostomy have comparable success rates in the management of proximal mid-bicanalicular obstructions. Dacryocystorhinostomy with retrograde intubation has lower complication rates and does not require long-term maintenance of the bypass tube, unlike conjunctivo-dacryocystorhinostomy.
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