Differential Diagnosis for Biphasic Stridor
- Single Most Likely Diagnosis
- A. Laryngomalacia: This condition is the most common cause of stridor in infants, and it can present with biphasic stridor due to the floppy and pliable cartilage of the larynx that can cause both inspiratory and expiratory obstruction.
- Other Likely Diagnoses
- B. Croup: Although croup typically presents with inspiratory stridor, in severe cases, it can cause biphasic stridor due to significant airway narrowing.
- C. Vascular ring: This congenital anomaly can cause external compression of the trachea, leading to biphasic stridor due to the fixed obstruction.
- Do Not Miss Diagnoses
- D. Subglottic stenosis: This condition can cause biphasic stridor due to the narrowing of the subglottic airway, and it's crucial to diagnose and treat promptly to avoid airway complications.
- Rare Diagnoses
- Other rare conditions that can cause biphasic stridor include congenital laryngeal webs, laryngeal cysts, or tumors, which can cause variable degrees of airway obstruction.
Note: The provided options and common causes of biphasic stridor are considered in this differential diagnosis. However, it's essential to remember that the clinical presentation, patient's age, and additional symptoms should guide the diagnostic approach.