Detailed procedure of probing for nasolacrimal duct obstruction

Under normal circumstances, nasolacrimal duct obstruction is caused by congenital narrowing of the tear ducts or acquired stenosis of the lacrimal passages, which affects the normal drainage of tears. A probing procedure can be performed to clear the blockage. The specific steps are as follows:

1. The patient lies flat and receives local anesthesia.

2. After the anesthesia takes effect, a punctal dilator is used to enlarge the lacrimal punctum.

3. A lacrimal probe is inserted through the punctum into the canaliculus, common canaliculus, lacrimal sac, and nasolacrimal duct, followed by injection and irrigation of fluid.

4. Once the tear duct is unobstructed, the patient will feel liquid flowing into the nasal cavity or pharynx.

5. After observing for a period with no abnormalities, the procedure is completed.

During the lacrimal probing procedure, patients may experience some discomfort. To avoid unnecessary physical injury, it is recommended to visit a正规 hospital and undergo the procedure under the guidance of a qualified physician. During the postoperative recovery period, patients should follow their doctor's instructions and attend regular follow-up visits to ensure proper restoration of lacrimal duct function.