2018年1月29日 · Nasolacrimal stents are small diameter tubes placed within the nasolacrimal system to maintain patency. The first described stent was made of silver wire and used by Graue in 1932.[1] Since that time, various materials have been used, including silk, nylon, polyethylene, and polypropylene.[2]

2015年4月27日 · 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.

2015年4月27日 · 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.

2020年5月13日 · 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].

2015年10月22日 · Copious discharge was noted with compression of the nasolacrimal sac, so dacryocystitis secondary to nasolacrimal duct obstruction (NLDO) was suspected. A dacryocystorhinostomy (DCR) was scheduled in one week in order to allow time for the cornea to heal and for targeted systemic antibiotics to decrease the bacterial load.

2017年1月12日 · 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.

Iodine-131 associated nasolacrimal duct obstruction (NLDO) typically presents bilaterally within 6-18 months of initiating radiotherapy (Burns, 2004). Though in our experience the duct is most frequently involved, obstruction of the upper lacrimal drainage structures has also been observed (Ibid). Incidence of

2015年4月27日 · 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.

2015年9月1日 · Externally, the retrieval is demonstrated by placing the hook along the inferior portion of the lateral nasal wall where the stent is engage and retrieved. The endoscope is then used to visualize the two silicone stents exiting from the area of the inferior meatus where the distal end of the nasolacrimal duct resides.

2015年9月1日 · 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.