The disadvantages of endonasal DCR are potentially smaller opening between the lacrimal sac and nasal cavity which can result in higher recurrence rates, more expensive equipment needed and a steep learning curve that requires the doctor or surgeon to have a thorough understanding of endonasal anatomy.
The advantages of endonasal DCR are no cuts through the skin are needed and no scar afterwards and the operation is slightly quicker than an external DCR.
Endonasal DCR also known as endonasal dacryocystorhinostomy is a minimally invasive surgery which treats blocked tear ducts.
An endonasal DCR done by a surgeon usign an endoscope, which is a small camera that is used to look through your nose.
The surgeon then creates a new opening in the bone between your tear sac and your nasal cavity.
An ophthalmic plastic surgeon may also insert a small tube to help keep your near tear duct open.
And a temporary silicone stent is then left in place for around 6 weeks to prevent the closing of the bypass channel.
The success rate of an endoscopic DCR is around 85 to 90 percent.
Endonasal DCR broadly refers to the approach from inside the nose, including the speculum or endoscope view.
External DCR involves an incision in the medial canthal or eyelid skin.