A nurse is assessing a client who has asthma.
Which of the following areas should the nurse evaluate as the most reliable indicator of central cyanosis?
Conjunctivae.
Soles of the feet.
Oral mucosa.
Ear lobes.
The Correct Answer is C
The correct answer is Choice C.
Choice A rationale
The conjunctivae, the mucous membranes that cover the front of the eye and line the inside of the eyelids, can show signs of cyanosis. However, they are not the most reliable indicator of central cyanosis. Central cyanosis is best observed in areas with a rich blood supply and thin skin, where the bluish discoloration due to low oxygen levels in the blood is more apparent.
Choice B rationale
The soles of the feet are not a reliable indicator of central cyanosis. Peripheral cyanosis, which affects the extremities, can occur due to poor circulation or cold temperatures and does not necessarily indicate central cyanosis. Central cyanosis is more accurately assessed in areas with a high concentration of blood vessels and thin skin.
Choice C rationale
The oral mucosa, including the lips and tongue, is the most reliable indicator of central cyanosis. This area has a rich blood supply and thin skin, making it easier to observe the bluish discoloration caused by low oxygen levels in the blood. Central cyanosis is a sign of significant hypoxemia and requires prompt medical attention.
Choice D rationale
The ear lobes are not the most reliable indicator of central cyanosis. While they can show signs of cyanosis, they are not as accurate as the oral mucosa. The ear lobes may be affected by peripheral cyanosis, which can occur due to factors like cold temperatures or poor circulation, rather than central cyanosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
The correct answer is Choice D.
Choice A rationale
The influenza vaccine is recommended annually for all individuals, including adolescents, to protect against the flu. However, it is not specifically required for pre-college physical assessments.
Choice B rationale
The pneumococcal polysaccharide vaccine is typically administered to older adults and individuals with certain medical conditions. It is not a standard requirement for adolescents.
Choice C rationale
The Bacille Calmette-Guérin (BCG) vaccine is used in countries with a high prevalence of tuberculosis. It is not commonly administered in the United States or required for pre-college physical assessments.
Choice D rationale
The meningococcal polysaccharide vaccine is recommended for adolescents, especially those entering college, to protect against meningococcal disease, which can spread in close living quarters.
Correct Answer is A
Explanation
The correct answer is A. Tugging on the affected ear lobe.
Choice A rationale
Tugging on the affected ear lobe is a common sign of otitis media in children. This behavior is often observed because the child is experiencing discomfort or pain in the ear, and tugging or pulling on the ear lobe is a way to express or alleviate that discomfort.
Choice B rationale
Erythema and edema of the affected ear are not typical findings in otitis media. These symptoms are more commonly associated with external ear infections, such as otitis externa.
Choice C rationale
Pain when manipulating the affected ear lobe is more indicative of otitis externa rather than otitis media. Otitis media involves the middle ear, and manipulation of the ear lobe does not typically cause pain.
Choice D rationale
Clear drainage from the affected ear is not a typical finding in otitis media. If there is drainage, it is usually purulent (pus-like) and indicates a more severe infection or a ruptured eardrum.
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