LAUSR

Abstract Background In the external dacryocystorhinostomy (DCR), a sutured anastomosis technique performed between the nasal mucosal and lacrimal sac flaps reported by Dupuy-Dutemps and Bourguet was the gold standard and was believed to lead to the success of the surgery. However, because of the small working space, a flap suturing technique has not been completely established in endonasal DCR (END-DCR). Objectives The effect of the modified flap suture anastomosis technique using a Sonopet ultrasonic bone aspirator was retrospectively compared to that using a diamond burr in patients with nasolacrimal duct obstruction. Materials and Methods One hundred ten patients underwent the modified flap suturing technique using the Sonopet, and 30 patients were operated on using a diamond burr. Results Successful patency of the lacrimal ostium (LO) was obtained in all patients in both groups. The rates of successful suturing during the operation and of a large diameter of the LO 3 months after the operation were significantly higher in patients in whom the Sonopet rather than the burr was used. Conclusions and Significance The Sonopet might offer similar surgical outcome to the traditional microdrill DCR and is a safer means of bone removal in END-DCR in the small working space.