Choanal Atresia
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Transcript of Choanal Atresia
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Choanal Atresia
Alyssa Brzenski
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Case• 33 year old mother has delivered a term
baby boy by C-Section. The baby was intubated in the delivery room for respiratory distress. The nurse attempted to place a NGT however it was unable to pass. ENT was consulted and have a presumptive diagnosis of choanal atresia. You are scheduled to do the anesthesia for the repair. When you arrive at the NICU the mother has a tracheostomy in place as does 2 older brothers.
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Choanal Atresia
Congenital narrowing at the posterior choanae
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http://www.edoctoronline.com
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The Basics• 1:5000-1:7000 live births• 2:1 female predominance• More commonly unilateral
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CHARGE Syndrome• Coloboma• Heart disease (TOF, PDA, DORV,
VSD, ASD, Right Aortic Arch)• Atresia choanae• Retarded growth (CNS anomalies)• Genital anomalies (hypogonadism)• Ear anomalies
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CHARGE criteria
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Embryology• Persistence of buccopharyngeal
membrane from the foregut• Abnormal persistence of mesoderm in
the nasochoanal region• Abnormal persistence of nasobuccal
membrane of Hochstetter• Misdirection of neural crest cell migration
with subsequent mesodermal migration
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Associations• Retinoic Acid• Thionamides (methimazole or
carbimizole)• Genetic Syndromes-
• CHARGE• Crouzon• Pfeiffer• Treacher Collins
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Presentation• Bilateral atresia-
• Cyanosis at birth that resolves with crying• Oral airway, McGovern Nipple or intubation
• Unilateral atresia• Presents later (5-24 months) with unilateral
nasal discharge
• Associated syndromes-• Other facial and airway issues• Thick pterygoid bone• May delay repair
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Work up• Attempt to pass a catheter through the
nare• ENT exam• CT of sinuses and skull base after
decongestion and suctioning
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Timing of Surgical Repair
• Most bilateral can be done within the first few days of life to aid in growth and development
• CHARGE syndrome may require a delay• Tracheostomy typically needed
• Unilateral atresia • Before school age
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Surgical Repair
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Surgical Repair- Transpalatal
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Surgical Repair- Endoscopic
• More commonly used• Size of child is a limitation• Small restenosis rate (12%)
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Stents
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Lasers• CO2 laser ineffective for treating
choanal atresia• KTP laser can be used for membranous
lesions
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Anesthesia Concerns• May be called to intubate at birth• Oral airway or a nipple can prevent
obstruction in the newborn• Oral airway helpful on induction to maintain
airway• If associated with a syndrome may have a
difficult airway• Extubation depending on clinical situation
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Sources• Hengerer et al. Choanal Atresia: Embryologic
Analysis and Evolution of Treatment. Laryngoscope. 118: May 2008; 862-6.
• Corrales C, Koltai P. Choanal Atresia: Current Concepts and Controversies. Current Opinions in Otolaryngology. 17: 2009; 466-70.
• Ramsden J, Campisis P. Choanal Atresia and Stenosis. Otolaryngology Clin N Am. 42: 2009; 339-52.