Why should the nurse closely monitor the IV flow rate for a 5-month-old infant with severe diarrhea receiving IV fluids?

Correct Answer: D

Rationale: The correct answer is D: Preventing cardiac overload. Infants are highly vulnerable to fluid overload, making it essential to carefully monitor IV flow rates to prevent complications such as cardiac overload. Rapid administration of IV fluids can lead to an excessive increase in circulating volume, potentially causing cardiac strain or heart failure in infants. Choices A, B, and C are incorrect. Monitoring the IV flow rate is not primarily aimed at limiting output, replacing lost fluids, or avoiding IV infiltration in this scenario. The key concern is to prevent the risk of cardiac overload due to the infant's susceptibility to fluid imbalances.

Correct Answer: B

Rationale: The correct statement regarding 2-rescuer child CPR is to compress the chest with one or two hands to a depth equal to one-half to one third the diameter of the chest. This technique ensures effective chest compressions without causing excessive damage to the chest. Choice A is incorrect because allowing the chest to fully recoil between compressions is essential to facilitate optimal blood flow during CPR. Choice C is incorrect as it describes a compression to ventilation ratio of 30:2, which is not the recommended ratio for child CPR. Choice D is incorrect as a compression to ventilation ratio of 15:2 is not standard practice for child CPR, and pauses in compressions are necessary to provide ventilations effectively.

Correct Answer: D

Rationale: At 10 months of age, pulling to a stand is a developmental milestone that most infants can achieve. Crawling typically occurs around 6-9 months, sitting without support around 6-8 months, and standing with assistance around 7-11 months. Therefore, choices A, B, and C are not the expected developmental milestones for a 10-month-old infant.

Correct Answer: B

Rationale: The correct answer is B: Covering the sac with saline-soaked nonadhesive gauze. This intervention is essential in caring for an infant with myelomeningocele as it helps prevent infection and maintains a moist environment around the sac before surgical repair. Positioning the infant supine with a pillow under the buttocks (Choice A) may be suitable for comfort but is not directly related to managing the myelomeningocele. Wrapping the infant snugly in a blanket (Choice C) and applying a diaper (Choice D) are not recommended as they can increase the risk of infection and damage to the sac.

Correct Answer: C

Rationale: For a 5-year-old child, an apical pulse below 90 beats/min is an indicator to withhold digoxin. Digoxin is a medication that affects the heart, and in pediatric patients, monitoring the pulse rate is crucial due to the risk of bradycardia (slow heart rate) as a potential side effect. In this case, an apical pulse of 90 beats/min or lower indicates a heart rate that may be too slow for a child of this age, warranting the withholding of digoxin and prompt notification of the healthcare provider. Choices A, B, and D are not within the critical range specified for withholding digoxin in a 5-year-old child and would not necessitate withholding the medication.

Correct Answer: A

Rationale: The correct answer is A: 'Mental retardation occurs if PKU is untreated.' Phenylketonuria (PKU) is a metabolic disorder that results in the inability to metabolize phenylalanine properly. Without proper dietary management, high levels of phenylalanine can lead to severe mental retardation and other neurological problems. Therefore, educating parents about the importance of early and consistent treatment to prevent mental retardation is crucial. Choice B is incorrect because testing for PKU is typically done shortly after birth, not immediately. Choice C is incorrect because treatment for PKU primarily involves strict dietary management to control phenylalanine intake, not lifelong medications. Choice D is incorrect because PKU is inherited in an autosomal recessive pattern, not as an autosomal dominant gene.

Correct Answer: B

Rationale: The correct answer is the sweat chloride test. This test is crucial in diagnosing cystic fibrosis as it measures the amount of chloride in sweat, which is typically elevated in individuals with cystic fibrosis. A chest X-ray (Choice A) may show characteristic findings like hyperinflation or bronchiectasis, but it is not a definitive diagnostic test for cystic fibrosis. Pulmonary function tests (Choice C) may help assess lung function but are not specific for cystic fibrosis. Sputum culture (Choice D) may be used to identify specific pathogens causing respiratory infections but is not a primary diagnostic test for cystic fibrosis.

Correct Answer: C

Rationale: For a 5-year-old child, an apical pulse below 90 beats/min is a reason to withhold digoxin. Digoxin is a medication commonly used to treat heart conditions, and its administration is based on heart rate parameters. A pulse rate below 90 beats/min indicates bradycardia. In pediatric patients, bradycardia below this threshold may be a sign of toxicity or potential adverse effects of digoxin, necessitating withholding the medication and informing the healthcare provider. Choices A, B, and D are incorrect as they represent pulse rates above the threshold for withholding digoxin in a 5-year-old child.

Correct Answer: D

Rationale: The correct answer is D. The grasp reflex and startle reflex (Moro reflex) are normal in newborns but typically disappear as the infant's nervous system matures and voluntary control develops. At around five months of age, these reflexes are replaced by voluntary movements as part of the normal developmental process. Choices A, B, and C are incorrect. Choice A suggests delaying a decision until further assessment, which is not necessary as the disappearance of these reflexes is a normal part of infant development. Choice B implies a developmental delay, which is not the case as these reflexes naturally disappear with age. Choice C recommending additional sensory stimulation is unnecessary and not the reason for the absence of these reflexes.