THE LYMPHATIC PATHWAY FROM THE NOSE AND PHARYNX

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Abstract
The cervical lymph duct in the monkey, dog, cat and rabbit was cannulated in order to observe the passage of dye through the mucous membranes. Solns. of T-1824 and trypan blue in physiological saline were dropped in the noses of all 4 kinds of animals. The dye appeared in the cervical lymph in 15 to 53 mins. A graphite suspension (Hydrokollag), used only in the cat, failed to pass into the cervical lymph. Blood samples taken after ligating the superficial and cannulating the deep lymphatics in the neck of the cat showed that the dye was also absorbed directly into the blood stream. Neither the dyes nor the Hydrokollag, though left in the nose for as long as 6 hrs., was found to pass through the cribriform plate and reach the interior of the cranium. The passage of the dye from the nose marked the anatomical pathway to the cervical duct. In the monkey the cervical lymph passed through a chain of 5 or more lymph nodes; in the rabbit, frequently through 2 nodes; in the cat, through 1 node, except in rare instances; and in the dog, through 1 node.