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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Dacrocytorhinostomy involves?
assistant
The correct answer is  Ans. is 'b' i.e., Connecting the lacrimal sac to nose by breaking the medial wall Dacryocystorhinostomy is the surgical procedure which involves removal of bone adjacent to lacrimal sac (medialwall) and incorporating the lacrimal sac with lateral nasal mucosa (at middle meatus) in order to bypass the obstruction in nasolacrimal duct. Advantage of dacryocystorhinostomy over dacryocystectomy is that there is no epiphora or watering of eyes posteoperatively. Indications of dacryocystorhinostomy are :- Congenital or acquired nasolacrimal duct obstruction. Functional obstruction to lacrimal outflow (e.g. lacrimal pump weakness) or facial nerve palsy. History of dacryocystitis Dacryocystorhinostomy can be done either open (external) approach or endonasal (endoscopic) approach.