nasolacrimal drainage apparatus
The nasolacrimal (drainage) apparatus consists of:
Tears produced by the lacrimal gland, accessory lacrimal glands of Krause, Wolfring and Zeis, and Meibomian glands track medially along the eyelid margins and collect at the lacrimal lake at the inner canthus. The nasolacrimal drainage apparatus drains tears in a descending course through the inferior and superior lacrimal canaliculi and common canaliculus through the valve of Rosenmuller leading to the lacrimal sac, which drains into the nasolacrimal duct in the nasolacrimal canal of the maxilla and through the valve of Hasner to the inferior nasal meatus below the inferior turbinate in the nasal cavity.
Note that the nasolacrimal apparatus is not to be confused with the lacrimal apparatus, which also includes the lacrimal gland.
- nasolacrimal drainage apparatus obstruction
- nasolacrimal tumors
- squamous cell papillomas and carcinomas
- transitional cell papillomas and carcinomas
- adenoid cystic carcinoma
- malignant melanomas
- Saccus lacrimalis
- Ductus nasolacrimalis
- unterer Nasengang
- canaliculus lacrimalis
- Ductus lacrimalis communis
- puncta lacrimalia superius und inferius