Chapter 205 : Glottic and Subglottic Stenosis Flashcards
Congenital stenosis is secondary to inadequate recanalization of the laryngeal lumen after completion of normal epithelial fusion which is seen at which week of gestation?
End of the third month of gestation
Most common site of congenital laryngeal webs?
75% occur at glottic level
What is the normal subglottic lumen diameter in a full term neonate?
4.5 to 5.5 mm
What is the 3rd mos common congenital disorder of the larynx:
Laryngomalacia > RLN paralysis > Subglottic stenosis
Congenital Subglottic stenosis is more severe than acquired sublottic stenosis?
FALSE
Most common cause of aquired laryngeal stenosis?
Trauma
Posterior glottic stenosis is commonly caused by?
Prolonged intubation
Primary symptom of laryngeal stenosis?
Progressive respiratory difficulty
All cases of moderate to severe stenosis required tracheotomy?
TRUE
Grade II laryngeal stenosis constitutes how many percet of lumen obstruction?
70-90%
Grade I laryngeal stenosis constitutes how many percet of lumen obstruction?
>70%
Grade III laryngeal stenosis constitutes how many percet of lumen obstruction?
>90%
What antineoplastic antibiotic acts as an alkylating agent by inhibiting DNA and protein synthesis used in managing laryngeal stenosis?
Mitomycin C
What are the indications for use of cartilage graft in posterior glottis and sublottis stenosis?
- Posterior glottic stenosis or SGS
- Isolate subglottic shelves
- Circumferential SGS, when the posterior cricoid lamina has been divided.
Primarily indicated in SGS without significant tracheomalacia or tracheal obstruction?
Single stage laryngeal reconstruction
