Contrast dacryocystography

Dacryocystorentgenography makes it possible to obtain the most valuable information about the level and degree of disturbance of the patency of the tear ducts.

Technique of performing daqcristography

• lower lacrimal points dilate with the dilator Nettleship;
• In the lower tubules, plastic catheters are inserted on both sides (the upper lacrimal point can be used);
• contrast medium (usually 1 ml of lipoidol) is simultaneously administered from both sides and radiographs are performed in the anterior-posterior projection;
• After 5 minutes, a picture is taken under a vertical slope in order to evaluate the effect of gravity on the drainage of tears.

Interpretation of the Daikristogram

The non-occurrence of contrast in the nose indicates anatomical obstruction, the location of which is usually obvious. A normal dacryocystogram in the presence of teardrop indicates a partial blockade or failure of the tear suction mechanism. Dacryocystography is also informative in the diagnosis of diverticulum, fistula and filling defects caused by stones or tumors.

Scintigraphy of lacrimal canals

This is a complex study that assesses drainage function with a greater variety of physiological states than dacryocystography. And although scintillography does not provide a detailed visualization of anatomical changes, as in dacryocystography, it is more informative in assessing partial blockade, especially in the upper part of the lacrimal system. The research is carried out as follows:

• radionuclide technecium-99 in a volume of 10 μl is injected with a micropipette into the conjunctival sac. Lacrimal fluid is labeled with this radioactive gamma-emitting substance;
• glow is visualized by a gamma camera focused on the inner corner of the eye gap and a sequence of images is recorded for 20 minutes.

[1], [2], [3], [4], [5], [6], [7], [8], [9],