Veterinary Drug Handbook (VDH) is the reference veterinarians turn to when they want an independent source of information on the drugs that are used in veterinary medicine today.


A technique in which radiopaque contrast material is injected into the punctum and flushed through the nasolacrimal duct, followed by lateral and VD radiographic views of the skull, to evaluate the nasolacrimal system and surrounding bony structures.

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