Silent aspiration: Who is at risk?

Area of Science:

• Pediatric medicine
• Otolaryngology
• Neurology
• Genetics

Background:

• Silent aspiration, a condition where food or liquid enters the airway without a protective cough, is a significant concern in pediatric patients.
• Early identification and management are crucial for preventing complications such as pneumonia and malnutrition.

Purpose of the Study:

• To determine the prevalence of silent aspiration in pediatric patients.
• To identify specific diagnoses associated with silent aspiration in children.

Main Methods:

• A retrospective review of modified barium swallow (MBS) studies was conducted for pediatric patients (<18 years) at a tertiary children's hospital.
• Speech-language pathologists analyzed MBS studies for aspiration and silent aspiration across different fluid consistencies.
• Patient charts were reviewed for demographic data and relevant medical diagnoses (otolaryngologic, neurologic, genetic, syndromic).

Main Results:

• Of 1,286 patients, 34% aspirated, with 89% of those demonstrating silent aspiration.
• Silent aspiration was prevalent in infants (<6 months) (41% of aspirators, 95% silent).
• Diagnoses associated with silent aspiration included laryngeal cleft, laryngomalacia, unilateral vocal fold paralysis, developmental delay, epilepsy, syndromes, and congenital heart disease.

Conclusions:

• Silent aspiration is more common than previously recognized in pediatric populations.
• The absence of a cough does not rule out aspiration; MBS studies are vital for detection.
• Identifying associated diagnoses aids in managing silent aspiration and guiding feeding therapy.