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 A
Explanation
The correct answer is Choice A.
Choice A rationale
A 13% weight loss indicates severe dehydration. Dehydration is classified based on the percentage of body weight lost, with severe dehydration being more than 10%6.
Choice B rationale
A bulging anterior fontanel is a sign of increased intracranial pressure, not dehydration. In dehydration, the fontanel is typically sunken due to fluid loss.
Choice C rationale
Bradypnea, or slow breathing, is not a common sign of dehydration. Dehydration often leads to tachypnea, or rapid breathing, as the body tries to compensate for fluid loss.
Choice D rationale
A capillary refill time of 3 seconds is within normal limits. In severe dehydration, capillary refill time is usually prolonged, indicating poor perfusion.
Correct Answer is C
Explanation
The correct answer is C. Sit the child upright and apply pressure to the sides of the nose.
Choice A rationale
Keeping the child flat and applying pressure to the bridge of the nose is not effective for managing a nosebleed. The child should be in an upright position to reduce blood flow to the nose and prevent swallowing blood.
Choice B rationale
Turning the child’s head to the side and pressing on the nasal ridge is not the recommended approach for managing a nosebleed. The child should be in an upright position with pressure applied to the sides of the nose.
Choice C rationale
Sitting the child upright and applying pressure to the sides of the nose is the correct action. This position helps to reduce blood flow to the nose and applying pressure helps to stop the bleeding.
Choice D rationale
Elevating the head of the bed slightly and applying pressure to the forehead is not effective for managing a nosebleed. The child should be in an upright position with pressure applied to the sides of the nose to stop the bleeding. .
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