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 C
Explanation
The correct answer is Choice C.
Choice A rationale
Puberty might be delayed if scrotal changes have not occurred by the age of 13½ to 14 years, not 11 years.
Choice B rationale
Changes in the voice occur during puberty but do not signal its beginning. Enlargement of the testicles is the first sign of puberty in boys.
Choice C rationale
Growth spurts in height typically occur toward the end of mid-puberty, making this the correct answer.
Choice D rationale
Gynecomastia, or the development of breast tissue in boys, commonly occurs during mid- puberty, not late puberty. .
Correct Answer is A
Explanation
The correct answer is Choice A.
Choice A rationale
Increased crying episodes are a common indicator of pain in infants. Crying is a behavioral response to discomfort and can be more intense or frequent when the infant is in pain. This response is due to the activation of the infant’s nervous system, which signals distress through crying.
Choice B rationale
Decreased respiratory rate is not typically associated with pain in infants. Pain usually causes an increase in respiratory rate due to the body’s stress response, which involves the release of adrenaline and other stress hormones that stimulate the respiratory system.
Choice C rationale
Decreased heart rate is also not a common sign of pain in infants. Pain generally leads to an increased heart rate as part of the body’s fight-or-flight response, which is mediated by the sympathetic nervous system.
Choice D rationale
Increased formula consumption is not an indicator of pain. In fact, pain might reduce an infant’s appetite and lead to decreased feeding. Pain can cause discomfort during feeding, leading to fussiness and refusal to eat.
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