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- Nasolacrimal Stents: An Introductory Guide - University of Iowa
Nasolacrimal tubes are used primarily in cases of obstruction or laceration of one or more parts of the tear drainage system [4] The differential diagnosis of nasolacrimal obstruction is broad and includes trauma, infection, malignancy, thermal injury, chemotherapy, radiation, and iatrogenic causes [3]
- Probing and Stenting - University of Iowa
This video demonstrates a probing and stenting of a child with congenital nasolacrimal duct obstruction A punctal dilator is introduced into the lower punctum And the same is performed on the upper punctum The dilator is first introduced vertically followed by horizontal advancement A Bowman probe is then placed
- Probing and stenting of nasolacrimal duct with fluorescein irrigation
As you can see this refluxes through the upper punctum indicating a nasolacrimal duct obstruction The Bowman probe is then placed through the upper system and down the nasolacrimal duct The patient's nose had been previously packed with Afrin® [oxymetazoline] soaked neurosurgical cottonoids The nasal packing is removed
- Lacrimal system examination - University of Iowa
A lacrimal cannula on a 3 cc syringe filled with saline is then used to evaluate the patency of the nasolacrimal duct The lacrimal cannula is introduced into the canaliculus followed by irrigation with the saline The patient should be able to taste the saline in the back of their throat if the nasolacrimal duct is not obstructed
- Congenital Nasolacrimal Duct Obstruction - University of Iowa
The nasolacrimal duct opens into the inferior nasal meatus which is partially covered by another mucosal fold known as the valve of Hasner [4] Congenital nasolacrimal duct obstruction is most commonly caused when there is incomplete canalization at the distal end of the duct, creating an imperforate membrane at the valve of Hasner [1]
- Bilateral Nasolacrimal Duct Obstruction after Adjuvant Radioactive . . .
Diagnosis: Bilateral Nasolacrimal Duct Obstruction related to high dose I-131 therapy Discussion Though primary acquired nasolacrimal duct obstruction (PANDO) constitutes the majority of nasolacrimal duct obstructions (unilateral or bilateral), it is relatively uncommon in patients younger than 60 years of age (Tucker, 1997)
- Inferior turbinate infracture - University of Iowa
This video demonstrates an inferior turbinate infracture which is useful in cases of congenital nasolacrimal duct obstruction in addition to probing and stenting when there is not a lot of room under the inferior turbinate A Freer periosteal elevator is slid along the lateral nasal wall medial to the inferior turbinate
- Stent retrieval
This video demonstrates retrieval of a Crawford stent with a hook as well as a groove director The patient has a history of a congenital nasolacrimal duct obstruction The Crawford stent is placed through the upper punctum and canaliculus The stent is then rotated and advanced down the nasolacrimal duct
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