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 B
Explanation
The correct answer is Choice B.
Choice A rationale
Droplet precautions are used for infections spread through large respiratory droplets, such as influenza, but are not sufficient for measles.
Choice B rationale
Airborne precautions are necessary for measles, as it is spread through small droplets that can remain suspended in the air and travel over long distances.
Choice C rationale
Contact precautions are used for infections spread through direct contact with the patient or their environment, such as MRSA, but are not sufficient for measles.
Choice D rationale
A protective environment is used for patients with compromised immune systems to protect them from infections, not for preventing the spread of infections like measles.
Correct Answer is A
Explanation
The correct answer is Choice A.
Choice A rationale
High fever is a common finding in children experiencing sickle cell crisis. The crisis is often triggered by infections, which can cause fever. The sickled red blood cells can block blood flow, leading to tissue ischemia and necrosis, which can also contribute to fever.
Choice B rationale
Bradycardia, or a slow heart rate, is not typically associated with sickle cell crisis. The crisis usually causes an increased heart rate due to pain and the body’s stress response.
Choice C rationale
Constipation is not a common finding in sickle cell crisis. The primary symptoms are related to pain and vaso-occlusion, which can cause severe pain and other complications.
Choice D rationale
Decreased respiratory rate is not a typical finding in sickle cell crisis. The crisis can cause respiratory distress due to pain and hypoxia, leading to an increased respiratory rate.
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