A nurse is planning to administer diphenhydramine 1.25 mg/kg IV to a school-age child who weighs 55 lb. Available is diphenhydramine 50 mg/mL. How many ml should the nurse administer?
(Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.6"]
Rationale:
First, we need to convert the child's weight from pounds to kilograms. We can do this by dividing 55 by 2.2, which gives us 25 kg.
Next, we need to multiply the dose of diphenhydramine by the child's weight to get the total amount of medication needed. We can do this by multiplying 1.25 mg/kg by 25 kg, which gives us 31.25 mg.
Finally, we need to divide the total amount of medication by the concentration of the solution to get the volume to be administered. We can do this by dividing 31.25 mg by 50 mg/mL, which gives us 0.625 mL.
To round the answer to the nearest tenth, we look at the hundredths place and see that it is 5 or more, so we round up the tenths place by one. Therefore, the nurse should administer 0.6 mL of diphenhydramine IV to the child.
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Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is []
Explanation
Correct Answers:
Condition Most Likely Experiencing: C
Actions to Take: A, B
Parameters to Monitor: B, C
Rationale:
Condition Most Likely Experiencing
A. Pyloric stenosis causes projectile vomiting, dehydration, and hunger.
B. Cystic fibrosis causes chronic respiratory infections, steatorrhea, and failure to thrive.
C. The condition that the infant is most likely experiencing is congestive heart failure, which can cause poor weight gain, tachypnea, decreased appetite, and periorbital edema.
D. Respiratory syncytial virus bronchiolitis causes wheezing, coughing, and respiratory distress.
Actions to Take
A. Elevating the head of the bed can help reduce the workload of the heart and improve breathing.
B. Digoxin can increase the contractility of the heart and decrease the heart rate.
C. Contact precautions are not indicated for congestive heart failure, but for infections that are transmitted by direct or indirect contact.
D. Chest physiotherapy and postural drainage are not indicated for congestive heart failure, but for conditions that cause excessive mucus production and retention.
Parameters to Monitor
A. Number of steatorrhea stools is not relevant for congestive heart failure, but for cystic fibrosis or other malabsorption disorders.
B. Intake and output can indicate fluid balance and renal function.
C. Respiratory status can reflect cardiac function and oxygenation.
D. Presence of periorbital edema is not a parameter to monitor, but a sign of fluid overload.
Correct Answer is B
Explanation
Rationale:
A. Pinpoint pupils are more commonly associated with opioid overdose rather than inhalation of gasoline.
B. Ataxia, or lack of coordination, is a common neurological symptom of gasoline inhalation due to its toxic effects on the brain and nervous system.
C. Hyperactive reflexes are not typically associated with gasoline inhalation but rather with stimulant use such as amphetamines or cocaine.
D. Inhalation of gasoline is more likely to cause hyperthermia due to its effects on the central nervous system and metabolic rate.
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