About the service
Probing and dilation restore nasolacrimal duct patency when obstruction is confirmed. When needed, the doctor considers temporary stent intubation or another treatment approach.
Lacrimal drainage obstruction: probing, dilation, and intubation
After moistening the ocular surface, tears drain through the puncta, canaliculi, lacrimal sac, and nasolacrimal duct into the nasal cavity. A membrane, narrowing, scar, or another obstruction along this pathway can cause tears to stagnate.
Symptoms may include persistent tearing, mucus or purulent discharge, and eyelashes sticking together. Inflammation may cause painful swelling near the inner corner of the eye.
How do the causes differ in children and adults?
In children, congenital obstruction of the distal nasolacrimal duct is typical. Many cases resolve spontaneously, so the timing of probing is determined individually according to age and the clinical situation.
In adults, causes are more often acquired: chronic inflammation, trauma, scarring, nasal or sinus changes, tumors, or age-related narrowing. The same complaint of tearing may therefore require different treatments.
How do the treatments differ?
- Probing aims to restore drainage by passing through the obstruction.
- Dilation widens a narrowed section of the lacrimal pathway.
- Intubation involves temporarily placing a thin silicone system after traversing the drainage pathway. It maintains the lumen during healing and, in selected clinical situations, reduces the risk of early reclosure.
- Dacryocystorhinostomy (DCR) creates a new tear drainage route. It is a separate reconstructive operation that may be considered for complete or anatomically complex obstruction when indicated.
These methods have different indications and may be used in stages. They are not interchangeable.
For a child, initial management often involves observation and massage as recommended by the clinician. Persistent obstruction may lead to probing or dilation. Intubation may be needed for persistent or complex stenosis.
In adults, the choice depends more strongly on the cause and level of obstruction.
What is assessed before an intervention?
The clinician asks when tearing began, whether discharge or inflammation is present, and whether there is a history of trauma, surgery, or nasal and sinus disease.
After assessing patency and anatomy, the clinician selects observation, probing, dilation, intubation, or reconstructive surgery.
Clinical situations and next steps
- An infant with persistent tearing and discharge: a pediatric ophthalmologist assesses age, symptom duration, previous massage, inflammatory episodes, and drainage patency before recommending continued conservative care or an intervention.
- Symptoms return after probing: the previous obstruction type and time since the procedure are reviewed. Repeat probing, dilation, or intubation may be considered.
- An adult with persistent tearing: the obstruction level, ENT conditions, trauma, surgery, and inflammation are assessed. Probing, dilation, or intubation is selected only when the anatomy is suitable.
- Painful swelling and pus: urgent assessment is needed to exclude acute dacryocystitis or an abscess. Inflammation is treated first, and an elective procedure is planned afterward.
- Suspected complete or complex obstruction: its location and anatomy are established before discussing reconstruction, including DCR when indicated.
How do related reconstructive procedures differ?
DCR is not routine probing. Its indications and the components of the service are determined individually.
Reconstruction of a single lacrimal canaliculus is a separate procedure addressing a different anatomical problem.
Which specialist should be consulted?
Initial assessment is performed by an ophthalmologist or ophthalmic surgeon, or a pediatric ophthalmologist for a child.
Suspected complex lacrimal reconstructive conditions may require referral to the Outpatient Surgery Center and, when necessary, an ENT specialist.
For children, treatment should follow a current age-appropriate pathway and individual clinical indications.