Emergency War Surgery NATO Handbook: Part IV: Regional Wounds and Injuries: Chapter XXIV: Wounds and Injuries of the Eye
United States Department of Defense
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Lacrimal Excretory System. It is critically important to identify lacerations of the canaliculi so that they may be repaired properly at the time of wound repair. The canaliculi must be stented, preferably with silicone tubing. If silicone is not available, fine silver wire (eg. 3-0 or 4-0 Bowman probe) can be bent in the form of a Johnson lacrimal rod and used as a stent. In cases of midface trauma where the nasolacrimal duct may have been interrupted, the entire lacrimal excretory system should be stented with silicone tubing.
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