AST Surgical Technologist Practice Exam

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Which anatomical structure may require probing and dilating in pediatric patients with upper respiratory infections?

Nasal cavity
Pharynx
Nasolacrimal duct
Trachea

The correct answer is: Nasolacrimal duct

The nasolacrimal duct is the correct anatomical structure that may require probing and dilating in pediatric patients with upper respiratory infections. In children, especially during upper respiratory infections, the nasolacrimal duct can become obstructed or develop functional issues. This is often due to swelling or increased mucus production, which can lead to tear drainage problems. Probing and dilation of the nasolacrimal duct is a common procedure performed to alleviate blockage, allowing tears to properly drain from the eyes into the nasal cavity. Pediatric patients are particularly susceptible to these blockages due to the anatomical and physiological characteristics of their nasolacrimal system, making it essential to address any obstruction promptly to prevent complications like infections or chronic tearing. Other options like the nasal cavity, pharynx, and trachea may also be involved in upper respiratory conditions, but they do not typically necessitate the same specific interventions as the nasolacrimal duct in terms of probing and dilation.