CPN Pediatric Fluid Calculation Practice Questions

When calculating weight-based dosages for larger children, the resulting dose must never exceed the standard adult maximum. A 12-year-old weighing 65 kg receiving 45 mg/kg/dose would receive 2925 mg per dose, which is dangerously high. You should hold the medication and clarify the order to cap it at the adult maximum, typically 875 to 1000 mg per dose. Administering the medication based strictly on the pediatric formula ignores this critical safety cap. Recalculating with ideal body weight is incorrect because amoxicillin dosing uses actual body weight. Requesting an alternative antibiotic is unnecessary since the medication itself is appropriate for otitis media; only the prescribed dose requires adjustment by the provider.

For an infant with a ventriculoperitoneal shunt placed for hydrocephalus, parents must be highly vigilant for signs of shunt malfunction. Because infants cannot verbalize a headache, being unusually irritable and refuses to eat breakfast are classic, subtle warning signs of rising intracranial pressure that require immediate evaluation in the emergency department. Administering a weight-based dose of oral infant acetaminophen might temporarily soothe the child but dangerously masks the underlying neurological crisis. Scheduling an appointment with the pediatrician for tomorrow introduces an unacceptable delay in care, as increased intracranial pressure can cause rapid brain injury or death. Encouraging frequent small feedings throughout the morning hours is a helpful strategy for a simple gastrointestinal bug, but it completely fails to address the life-threatening mechanical failure of the ventricular shunt.

The standard protocol for status epilepticus involves giving an initial dose of a benzodiazepine and repeating it if the seizure does not stop. Option A is correct because if a seizure continues five minutes after the first dose, a second dose of intravenous lorazepam at the same weight-based calculation (0.1 mg/kg, up to a maximum of 4 mg) is indicated. Option B is incorrect; a continuous midazolam infusion is typically reserved for refractory status epilepticus after both first-line and second-line bolus medications have failed. Option C is incorrect because the child is currently maintaining an open airway with lateral positioning, so positive pressure ventilation is not immediately required unless respiratory failure develops. Option D is incorrect because second-line agents like fosphenytoin are generally initiated only after two doses of a benzodiazepine have been administered without success.

For adolescents, an adequate urine output is generally 0.5 to 1 mL/kg/hr. An output of 0.3 mL/kg/hr represents oliguria, which, when paired with an increasing heart rate in a trauma patient, points directly to hypovolemia and poor systemic perfusion. Anticipating an immediate isotonic fluid bolus is the correct action to restore intravascular volume and improve renal blood flow. Reassuring the adolescent is incorrect because these are dangerous signs of compensated shock, not a normal recovery trajectory. Decreasing the intravenous fluid rate is the opposite of what is needed and would further compromise end-organ perfusion. Preparing for emergency hemodialysis is incorrect because the low urine output is likely a prerenal issue caused by volume depletion, which should be aggressively treated with fluids before assuming intrinsic renal failure.

For severe hypoglycemia, the standard pediatric dosing for glucagon is weight-based. Children weighing under 20 kilograms (or under 5 years of age) should receive half a milligram (0.5 mg), while those over 20 kg receive a full 1.0 mg dose. Option C is correct because it provides the appropriate 0.5 mg dose via the intramuscular route and places the child in a lateral recovery position to protect the airway from potential vomiting. Option A and Option B are incorrect because a 1.0 mg dose is too high for an 18 kg child, and supine or prone positioning increases aspiration risk. Option D is incorrect because emergency glucagon kits for home or field use are designed for intramuscular or subcutaneous injection, not intravenous administration.

While self-reflection is important for long-term growth, implementing standardized, evidence-based protocols is the most effective immediate strategy to mitigate implicit bias and ensure equitable clinical outcomes. Option D is correct because a weight-based protocol removes subjective decision-making from the prescribing process and directly eliminates the disparity. Option A is a valuable practice but does not immediately correct the dosing disparity in the clinical moment. Option B is highly inappropriate and constitutes an abandonment of professional responsibility. Option C is incorrect because overcompensating by prescribing maximum doses without individual assessment is unsafe and represents another form of biased care.

In pediatric sepsis, a prolonged capillary refill greater than 3 seconds alongside cool extremities strongly indicates persistent hypoperfusion and uncompensated shock. The standard of care requires rapid, successive fluid boluses (up to 40-60 mL/kg in the first hour) until perfusion improves or signs of fluid overload develop. Therefore, preparing another isotonic crystalloid bolus is the best next step. Continuing only maintenance fluids is incorrect because it fails to address the child's active circulatory compromise. Initiating a dopamine infusion is premature; while vasoactive agents are used in fluid-refractory shock, the child has only received a single 20 mL/kg bolus and requires further volume expansion first. Administering furosemide is contraindicated, as it would exacerbate the child's profound intravascular depletion and worsen the shock state.

In pediatric sepsis management, persistent tachycardia after an initial fluid bolus often indicates ongoing hypovolemia and compensated shock. Option A is correct because standard guidelines recommend administering up to forty to sixty milliliters per kilogram of isotonic fluids in boluses if signs of shock persist. Option B is incorrect because prioritizing an antipyretic delays critical fluid resuscitation in a child showing signs of inadequate perfusion. Option C is a near-miss; vasoactive infusions are indicated for fluid-refractory shock, but this is typically defined after at least forty to sixty milliliters per kilogram of fluid have been given, not just twenty. Option D is incorrect because a drop of only five beats per minute is clinically insignificant and does not reflect adequate hemodynamic improvement, meaning routine monitoring is insufficient.

A hard limit in a dose error reduction system indicates the programmed dose exceeds safe institutional parameters and cannot be overridden. The nurse must verify the dose and patient weight, as data entry errors are the most common cause. Overriding the alert (Option A) is impossible with a hard limit. Bypassing the library for basic mode (Option B) removes essential safety guardrails and is dangerous. Manual administration (Option D) is inappropriate for continuous infusions like insulin and bypasses necessary safety checks.

When evaluating fluid resuscitation in pediatric patients, urine output is a highly reliable indicator of end-organ perfusion. For infants and young children, a normal urine output is typically 1 to 2 mL/kg/hr. Because this infant is producing 1.5 mL/kg/hr, their renal perfusion is adequate, making documentation the correct action. Administering a second fluid bolus is incorrect because the child is already showing signs of successful resuscitation and does not require additional acute volume expansion. Notifying the provider of inadequate perfusion is incorrect since the output falls perfectly within the normal therapeutic range. Finally, requesting a continuous furosemide infusion is inappropriate because there is no indication of fluid overload or heart failure that would necessitate diuretic therapy in this recovering infant.

Smart pumps use the programmed weight to calculate continuous weight-based dosing. When a significant weight change occurs, the nurse must program a new infusion to ensure the patient receives the correct dose per kilogram. Maintaining the old weight (Option A) leads to inaccurate dosing, which is dangerous with vasoactive medications. Adjusting the medication concentration (Option C) is a pharmacy function and does not correct the pump's weight data. Pausing to recalibrate (Option D) is not a standard pump function; the weight parameter itself must be manually updated.

An infant with a congenital heart defect is highly susceptible to transfusion-associated circulatory overload when receiving blood products. A new cough and tachypnea late in the transfusion are classic signs of volume overload, not an allergic or febrile reaction. You must stop the transfusion and assess for pulmonary edema or heart failure. Epinephrine is indicated for anaphylaxis, which typically presents with wheezing and hypotension. An antihistamine treats mild allergic reactions like hives, while an antipyretic is used for febrile non-hemolytic reactions.

This child exhibits moderate dehydration, indicated by the weight loss and delayed capillary refill. The standard of care is oral rehydration therapy, which is highly effective even with mild emesis. Option A correctly applies the recommended 100 mL/kg volume for moderate dehydration. Option B is incorrect because intravenous fluids are reserved for severe dehydration or when oral therapy fails. Option C is inappropriate as apple juice has high osmolarity, which can worsen diarrhea. Option D is incorrect because withholding fluids exacerbates dehydration; small, frequent sips should be encouraged instead.

Pediatric guidelines strongly state that over-the-counter multi-symptom cough and cold preparations are contraindicated in children under the age of four, and often discouraged for those under six. These medications lack proven efficacy in young children and carry a high risk of severe adverse events, including respiratory depression, arrhythmias, and accidental overdose. You must explain this contraindication to the parent and suggest safe alternatives like nasal saline or a humidifier. Calculating a weight-based dosage is incorrect because the medication should not be given at all. Recommending alternating it with acetaminophen is dangerous and increases the risk of toxicity, especially since many cold preparations already contain acetaminophen. Suggesting nighttime administration inappropriately endorses the use of an unsafe medication.

When educating parents on cast care, it is crucial to emphasize the warning signs of compartment syndrome, a surgical emergency. The presence of fingers are cool and pale this morning indicates compromised neurovascular status, requiring immediate evaluation by the orthopedic provider to potentially bivalve the cast. Elevating the arm above the heart level is a great preventative measure for expected mild edema immediately after casting, but it will not resolve established arterial compromise. Administering a weight-based ibuprofen dosage is appropriate for expected bone pain but dangerously masks the escalating, out-of-proportion pain associated with tissue ischemia. Applying a covered ice pack helps with localized inflammation in a normal postoperative course but does nothing to restore critical blood flow to the distal extremity once perfusion is visibly impaired.