Browsing by Subject "Surgical Correction"

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    Choanal Atresia Surgery
    (2025-04-22) Tan, Neil; Jonas, Nico
    Choanal atresia is defined as a blockage of the posterior nasal openings. It is a rare condition and has an incidence of 1/7000 live births. It can be unilateral or bilateral. The blockage is purely bony in 30% of cases; in the remaining 70% it is a mixed bony and membranous obstruction (Figure 1). Complete total bony obstruction is extremely rare. It is believed that membranous obstruction occurs due to failure of the bucconasal membrane to rupture sometime between the 5th and 6th weeks of foetal development. Bony obstruction occurs due to a combination of: •A narrow nasal cavity •Medial thickening of the medial ptery-goid plate •Lateral thickening of the vomer