A nurse is caring for a 3-year-old child who was admitted with acute diarrhea and dehydration. Which of the following findings indicates that oral rehydration therapy has been effective?
Heart rate 130/min
Urine specific gravity 1.015
Respiratory rate 24/min
Capillary refill less than 3 seconds
None
None
The Correct Answer is B
The correct answer is: b.
Choice A: Heart rate 130/min
A heart rate of 130 beats per minute (bpm) is considered high for a 3-year-old child. Normal heart rates for children aged 1-3 years typically range from 80 to 120 bpm. While dehydration can cause tachycardia (increased heart rate), a heart rate of 130 bpm does not necessarily indicate effective rehydration.
Choice B: Urine specific gravity 1.015
Urine specific gravity of 1.015 is within the normal range (1.005–1.030) for a hydrated child. Dehydration increases urine concentration (>1.020), but a normalized value like 1.015 shows that ORT has restored fluid balance. UpToDate and NIH studies (e.g., Binder et al., 2014) highlight urine specific gravity as a precise measure of hydration status, making it the strongest indicator of ORT effectiveness.
Choice C: Respiratory rate 24/min
The normal respiratory rate for a 3-year-old child is between 20 and 30 breaths per minute. A respiratory rate of 24 breaths per minute is within this normal range. While a normal respiratory rate can indicate improved hydration status, it is not the most specific indicator of effective rehydration therapy.
Choice D: Capillary refill less than 3 seconds
Capillary refill time of less than 3 seconds suggests adequate perfusion, as normal is under 2 seconds. Dehydration may prolong this time, but “less than 3 seconds” could include slightly delayed values (e.g., 2.5 seconds). UpToDate and NIH studies (e.g., Doan et al., 2010) note it as useful but less specific than urine specific gravity for confirming ORT effectiveness.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Assessing the client's erythematous rash is an important action for the nurse to take, but it is not the priority. The rash is one of the minor criteria for diagnosing acute rheumatic fever, and it may not be present in all cases. The rash is usually non-pruritic and migratory, and it appears on the trunk and extremities.
Choice B reason: Identifying the degree of parental anxiety related to the diagnosis is an appropriate action for the nurse to take, but it is not the priority. The nurse should provide emotional support and education to the parents, and address their concerns and questions. However, this is not the most urgent action.
Choice C reason: Auscultating the rate and characteristics of the child's heart sounds is the priority action for the nurse to take, as it can detect the presence and severity of carditis, which is the most serious complication of acute rheumatic fever. Carditis is the inflammation of the heart muscle, valves, or pericardium, and it can cause murmurs, tachycardia, dysrhythmias, heart failure, or death.
Choice D reason: Using a pain-rating tool to determine the severity of the joint pain is an important action for the nurse to take, but it is not the priority. The joint pain is one of the major criteria for diagnosing acute rheumatic fever, and it is usually severe and migratory, affecting the large joints such as the knees, ankles, elbows, or wrists. The nurse should assess the pain level and provide analgesics and anti-inflammatory medications as prescribed.
Correct Answer is A
Explanation
Choice A reason: This statement is correct because patent ductus arteriosus is a condition where the ductus arteriosus, a fetal blood vessel that connects the pulmonary artery and the aorta, fails to close after birth. This allows blood to flow from the aorta to the pulmonary artery, increasing the blood flow to the lungs and causing pulmonary hypertension.
Choice B reason: This statement is incorrect because coarctation of the aorta is a condition where the aorta, the main artery that carries blood from the heart to the body, is narrowed. This causes increased pressure in the upper body and decreased pressure in the lower body, reducing the blood flow to the kidneys and other organs.
Choice C reason: This statement is incorrect because tricuspid atresia is a condition where the tricuspid valve, which separates the right atrium and the right ventricle, is missing or abnormally developed. This prevents blood from flowing from the right atrium to the right ventricle, decreasing the blood flow to the lungs and causing cyanosis.
Choice D reason: This statement is incorrect because tetralogy of Fallot is a condition that involves four defects: a large ventricular septal defect, pulmonary stenosis, overriding aorta, and right ventricular hypertrophy. These defects cause blood to bypass the lungs and mix with oxygen-poor blood in the aorta, decreasing the blood flow to the lungs and causing cyanosis.
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