METHOD FOR SURGICAL MANAGEMENT OF DACRYOCYSTITIS IN ADULTS WITH IMPLANTING LACHRYMAL SURGICAL DRAIN TUBE Russian patent published in 2015 - IPC A61F9/08 A61F2/82 

FIELD: medicine.

SUBSTANCE: lower lachrymal point is expanded. A probe is projected along a lower lachrymal duct all the way to the bone. A light guide is delivered through the expanded lower lachrymal duct all the way to the bone and fixed manually. A nasal cavity is visualised with an endoscope. Bone tissue of a lateral wall of the nasal cavity is burned through with endoscopically controlled laser light until the laser light appears in the nasal cavity. That implies using a diode laser at wave length 970 nm, emission power 6-7 Wt, in the continuous mode. An endoscopically controlled drain tube is inserted into the formed fistula through the nasal cavity by means of a plastic injector 10.01 mm long, 2 mm in diameter. The drain tube is 8.4 mm long. An external diameter of the cylindrical portion is 3 mm, whereas an internal diameter is 2 mm with the length of 6 mm. For the purpose of fixation in the lachrymal sac, an implanted end of the drain tube has deformable fletching elements 5 mm in diameter, 1 mm wide from each side, and 3.2-3.5 mm in flexion diameter. At the opposite side of the drain tube, there is a pad 5 mm in diameter fixed in the nasal cavity. Along the entire drain tube, there are grooves 0.25 mm wide, 8-8.1 mm long for additional outflow of the lachrymal fluid.

EFFECT: method enables preventing recurrent atresias of the formed fistulas between the lachrymal sac and nasal cavity by long-term postoperative drainage of the formed fistula.

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