Endolacrimal KTP laser-assisted dacryocystorhinostomy

Objective: To describe our experience with potassium-titanyl-phosphate (KTP) laser-assisted dacryocystorhinostomy, controlled via endolacrimal and endonasal endoscopy. The development of miniendoscopes enables endoscopy of the lacrimal drainage system via the lacrimal puncta to visualize the exact site of a stenosis. Design: A case series of 78 patients, with 1-year post operative follow-up. Settings: A university medical center. Patients: Consecutive sample of 78 adult patients who required surgery for dacryostenosis. Intervention: Endolacrimal use of a KTP laser to perform a bony osteotomy of the lacrimal sac into the nasal cavity. The position for the perforation was controlled by endonasal endoscopy. The procedure was performed under either general or local anesthesia. Results: One year after surgery, 65 (83%) of the 78 patients were free of symptoms. Seven patients experienced intermittent tearing, and 6 had revision surgery because of restenosis. Conclusions:. The success rate of 83% achieved with KTP laser-assisted dacryocystorhinostomy, using miniendoscopes for lacrimal endoscopy to visualize the exact site of obstruction, is better compared with that of prior studies without the use of miniendoscopes (with success rates of 47%-85%). The advantages of this technique are that it is a minimally invasive procedure, requires a short operating time, and avoids use of an external incision.