Dacryocystography is a method of visualizing the lacrimal passages by the use of radioopaque contrast media. Ewing (I909) suggested the use of bismuth subnitrate in liquid petroleum as the contrast medium. Von Szily (i92o) described the pathology of the lacrimal passages as seen by roentgenography. Lipoidol was used as the contrast medium by Bollack (1924)
MaterialThe present study was carried out on two groups of individuals: L 37 control subjects These were out-patients with no complaint of epiphora. The lacrimal passages were found to be patent on syringing. IL I69 patients complaining of epiphora The condition of the lacrimal passages was assessed by syringing and the results were correlated with those obtained by dacryocystography. Technique 0o5 to I ml. concentrated dionosil solution (Saha, Bhardwaj, Malik, and Jain, I967) was injected into the lacrimal sac through the lower punctum with a 2 ml. syringe and cannula. Skiagrams were taken immediately after the injection in the following positions: (a) Postero-anterior view The patient lay prone in the nose-chin position with the orbit at an angle of 40o to the horizontal. The central ray was directed through the infraorbital margin of the injected side, about half an inch lateral to the midline. (b) Lateral view The patient's head was turned to the injected side; the central ray was directed as in the postero-anterior view.In each case a Potter-Bucky diaphragm was used.
Observations (I) APPEARANCE OF NORMAL DACRYOCYSTOGRAMIn all the normal subjects the lower canaliculus, lacrimal sac, and nasolacrimal duct were outlined. The following observations were made: (a) Canaliculi The lower punctum and the lower canaliculi were visible in all cases.
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