The nurse employed in an emergency department is instructed to monitor a child diagnosed with epiglottitis. The nurse notes that the child is leaning forward with the chin thrust out. The nurse interprets this observation as indicating which finding?

A. The sweat chloride test is considered the most definitive diagnostic test for cystic fibrosis. In this test, sweat is collected from the skin and analyzed for chloride content. Elevated levels of chloride in the sweat are indicative of cystic fibrosis. This test is highly sensitive and specific for diagnosing the condition.

B. Stool fat content analysis can help assess pancreatic function and malabsorption, which are common manifestations of cystic fibrosis. However, it is not considered the most definitive test for diagnosing cystic fibrosis. Elevated stool fat content can be suggestive of cystic fibrosis but is not specific to the condition.

C. Sputum culture may be performed to identify respiratory pathogens and guide antibiotic therapy in individuals with cystic fibrosis, but it is not the most definitive test for diagnosing the condition. It helps identify infections and monitor lung health but does not confirm the diagnosis of cystic fibrosis.

D. Pulmonary function tests are used to assess lung function and airflow, which can be affected in individuals with cystic fibrosis. While these tests provide valuable information about lung health, they are not the most definitive test for diagnosing cystic fibrosis. They are used for monitoring disease progression and response to treatment rather than confirming the diagnosis.

D. Tugging or pulling on the affected ear lobe is a classic sign of otitis media in infants. The discomfort or pain caused by inflammation and pressure in the middle ear may lead the infant to tug or rub the affected ear in an attempt to alleviate discomfort.

A. Bluish-green discharge from the ear canal is not a typical finding in otitis media. Otitis media is characterized by inflammation and fluid accumulation in the middle ear, which may not result in discharge unless there is a secondary bacterial infection or perforation of the eardrum.

B. An increase in appetite is not a typical finding in otitis media. In fact, many children with otitis media may experience a decrease in appetite due to discomfort, pain, and difficulty swallowing or chewing.

C. Erythema (redness) and edema (swelling) of the affected auricle (outer ear) are not typically associated with otitis media. Otitis media primarily affects the middle ear, where inflammation and fluid accumulation occur behind the eardrum.