University of Iowa Health Care

Ophthalmology and Visual Sciences

Endoscopic Retrieval of Crawford Stent

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This is Richard Allen at the University of Iowa.  This video demonstrates the endoscopic view of retrieval of a Crawford stent.  The endoscope is introduced into the nose.  The inferior turbinate is visualized.  The nasolacimal duct exits under the inferior turbinate in the area of the inferior meatus.  The inferior meatus resides between the lateral nasal wall and the inferior turbinate.  The Crawford stent is visualized exiting out the distal end of the nasolacrimal duct.  This area is always more inferior and lateral than you think.  Again, this is visualized with the inferior turbinate, followed by the inferior meatus, followed by visualization of the Crawford stent.  The stent will be retrieved with a Crawford hook.  The hook is introduced along the lateral wall of the nose, which is then swept medially to engage the Crawford stent.  The stent is then retrieved.  The silicone stent is then visualized exiting the distal end of the nasolacrimal duct between the inferior turbinate and lateral nasal wall.  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. 

last updated: 09/01/2015
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