TränenNasalkanal

The TränenNasalkanal, also known as the nasolacrimal duct, is a crucial anatomical structure responsible for draining tears from the eye into the nasal cavity. This drainage system begins at the puncta lacrimalia, small openings located at the inner corners of the upper and lower eyelids. From these puncta, tears flow into the lacrimal canaliculi, which merge to form the lacrimal sac. The lacrimal sac then empties into the TränenNasalkanal, a tube that travels downwards and opens into the inferior meatus of the nasal cavity, just beneath the inferior turbinate.

The primary function of the TränenNasalkanal is to prevent excessive tear accumulation on the ocular surface. This constant drainage is essential for maintaining clear vision and protecting the eye from irritation and infection. When we blink, the eyelids act like a pump, pushing tears towards the puncta and through the nasolacrimal system.

Blockages within the TränenNasalkanal can lead to various ophthalmic and otolaryngological issues. Symptoms of a blocked duct include excessive tearing (epiphora), recurrent eye infections (dacryocystitis), and in some cases, pain and swelling in the tear sac area. Blockages can be congenital, occurring from birth, or acquired due to factors such as aging, inflammation, trauma, or tumors. Treatment options vary depending on the cause and severity of the blockage and may include dacryocystorhinostomy (DCR), a surgical procedure to bypass the obstruction.