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
Shaking the inhaler for 3 to 5 seconds ensures that the medication is properly mixed and ready for administration. This step is crucial for delivering the correct dose of medication.
Choice B rationale
Pressing down twice on the MDI canister is incorrect as it can lead to an overdose of medication. The correct technique involves pressing down once per inhalation.
Choice C rationale
Waiting 2 minutes between inhalations is not necessary. The recommended wait time between inhalations is usually 30 seconds to 1 minute.
Choice D rationale
Rinsing the mouth with mouthwash after inhaling the medication is not recommended. Instead, rinsing with water is advised to prevent oral thrush, especially when using corticosteroid inhalers.
Correct Answer is D
Explanation
The correct answer is Choice D.
Choice A rationale
Encouraging progressive activity is generally beneficial for children with various health conditions, but it is not the primary focus for a child with polycythemia caused by a congenital heart disorder. The main concern is managing the increased blood viscosity and preventing complications related to it.
Choice B rationale
Expecting the skin to turn yellow is not a typical symptom of polycythemia. Jaundice is more commonly associated with liver conditions or hemolytic diseases, not polycythemia caused by congenital heart disorders.
Choice C rationale
Preparing for seizures is not directly related to polycythemia. Seizures are more commonly associated with neurological conditions or severe electrolyte imbalances, not polycythemia.
Choice D rationale
Preventing dehydration is crucial for children with polycythemia because dehydration can increase blood viscosity, leading to a higher risk of thrombotic events. Ensuring adequate hydration helps maintain proper blood flow and reduces the risk of complications.
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