Tears drain through small
openings in the corners of the lower and upper eyelids called puncta and enter
the nose through the nasolacrimal duct. An obstruction in the duct blocks the
normal flow of tears and causes a backflow in the eye. Blockage of the drainage
system causes tears to well up on the surface of the eyes and overflow on the
eyelashes, eyelids, and down the cheek.
In such a situation, the eyelids
can become red and swollen, and sometimes may even stick together. The severity
of such signs may vary under different conditions such as respiratory illness
or outdoor exposure to wind and dust. The treatment procedure depends on the
reasons for blockage of tear ducts. The reasons may be a tumor or infection and
the treatment differs accordingly. It requires more than one approach to
receive proper treatment.
In order to receive the best
treatment for nasolacrimal duct obstruction, one should be well-informed
about the surgical procedure, expected results and complications. DCR
(Dacryocystorhinostomy) is the surgical procedure used to treat the duct
obstruction. This surgical procedure eliminates the fluid and mucus retention
in the lacrimal sac. It releases the tear drainage and relieves the epiphora.
The DCR procedure involves the removal of the bone adjacent to the lacrimal sac
and incorporating the lacrimal sac with the lateral nasal mucosa to bypass the
nasolacrimal duct obstruction. It allows tears to directly drain into the nasal
cavity from the canaliculi through a low-resistance pathway.
If stable, the patient is
discharged post-surgery and advised rest for a week. The patient is instructed
not to do any heavy lifting, exercise or undertake any strenuous activity that
can induce bleeding. Hot drinks and food are also prohibited for the first 24
hours to reduce the risk of epistaxis caused by the heat induced nasal
vasodilation. Ice should be placed on the site of incision for at least 48
hours while awake to minimize swelling and bruising. The patient is told to
elevate the head always at a 45-degree angle and not blow air from the nose to
reduce the risk of hemorrhage. The silicone tube is removed 4 to 8 weeks after
the surgery.
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