COMPREHENSIVE NURSING CERTIFICATION &
NCLEX REVIEW EXAM
Pediatric Fluid & Electrolyte Management, Severe Dehydration, and
Multisystem Clinical Judgment (200 Questions with Detailed
Rationales)
Section 1: Core Scenario & Pediatric Severe Dehydration
(Questions 1 – 40)
Section 1: Pediatric Fluid & Electrolyte Imbalances and Severe
Dehydration
(1) A nurse is assessing a toddler who has clinical manifestations of
severe dehydration. Which of the following findings should the
nurse expect?
A. Capillary refill of 2 seconds
B. Tachycardia and sunken anterior fontanel
C. Moist mucous membranes and brisk skin turgor
D. Increased blood pressure and bounding peripheral pulses
Correct Answer: B
Rationale: Severe dehydration in a toddler manifests as significant
intravascular volume depletion leading to tachycardia, hypotension
(late sign), sunken anterior fontanel, dry mucous membranes,
tenting/poor skin turgor, deep tachypnea, oliguria or anuria, and
capillary refill greater than 4 seconds. Moist membranes and brisk
turgor indicate normal hydration.
,(2) A nurse is caring for an 18-month-old toddler admitted with
severe dehydration secondary to acute gastroenteritis. Which initial
prescription should the nurse anticipate and prepare for?
A. Administering an immediate oral rehydration solution (ORS) of
150 mL/kg over 4 hours
B. Initiating an IV bolus of 0.9% sodium chloride at 20 mL/kg rapidly
C. Administering a bolus of 5% Dextrose in water (D5W)
subcutaneously
D. Restricting all fluid intake for 8 hours to rest the gastrointestinal
tract
Correct Answer: B
Rationale: For a toddler with severe dehydration exhibiting
hemodynamic instability or shock, rapid IV fluid resuscitation with an
isotonic crystalloid solution (such as 0.9% sodium chloride or
lactated Ringer's) at 20 mL/kg is the standard initial emergency
intervention. Oral rehydration is indicated for mild to moderate
dehydration. D5W is hypotonic and contraindicated as an initial
resuscitation fluid.
(3) When monitoring a toddler receiving IV fluid resuscitation for
severe dehydration, which assessment finding best indicates effective
therapeutic response?
A. Urine output greater than 1 mL/kg/hr
B. Presence of tears when crying
C. Heart rate increasing from baseline by 20 beats/min
, D. Serum sodium level of 160 mEq/L
Correct Answer: A
Rationale: Adequate urine output (>1 mL/kg/hr in infants and
toddlers) is the single most reliable indicator of restored renal
perfusion and effective intravascular volume resuscitation. While tear
production and heart rate normalization are important, urine output
confirms renal recovery. Serum sodium of 160 mEq/L indicates
severe hypernatremia.
(4) A nurse is evaluating laboratory results for a toddler admitted
with severe dehydration from rotavirus. Which of the following lab
values is consistent with severe dehydration?
A. Specific gravity 1.002
B. Hematocrit 32%
C. Blood urea nitrogen (BUN) 35 mg/dL
D. Serum bicarbonate 26 mEq/L
Correct Answer: C
Rationale: Hemoconcentration occurs with severe dehydration,
leading to elevated BUN (normal toddler BUN is roughly 5–18
mg/dL) and elevated creatinine due to prerenal azotemia. Specific
gravity would be elevated (>1.030), hematocrit would be elevated,
and serum bicarbonate would be decreased due to metabolic acidosis
from diarrhea and dehydration.
, (5) A toddler with severe dehydration is noted to have deep, rapid
respirations (Kussmaul breathing) without signs of respiratory
distress. The nurse recognizes this breathing pattern as a
compensatory mechanism for which acid-base imbalance?
A. Respiratory alkalosis
B. Metabolic acidosis
C. Respiratory acidosis
D. Metabolic alkalosis
Correct Answer: B
Rationale: Severe dehydration and diarrhea in toddlers commonly
cause metabolic acidosis due to loss of bicarbonate-rich intestinal
fluids and lactic acid accumulation from poor tissue perfusion.
Kussmaul respirations represent the respiratory system's attempt to
compensate by blowing off carbon dioxide (an acid) to raise blood
pH.
(6) Question 6: A nurse is providing comprehensive nursing care for
a pediatric client presenting with clinical manifestations related to
fluid balance and systemic perfusion. Which of the following
assessments or interventions is priority for this client?
A. Monitor vital signs every 15 minutes and assess peripheral
perfusion.
B. Administer prescribed hypotonic maintenance intravenous fluids
immediately.
NCLEX REVIEW EXAM
Pediatric Fluid & Electrolyte Management, Severe Dehydration, and
Multisystem Clinical Judgment (200 Questions with Detailed
Rationales)
Section 1: Core Scenario & Pediatric Severe Dehydration
(Questions 1 – 40)
Section 1: Pediatric Fluid & Electrolyte Imbalances and Severe
Dehydration
(1) A nurse is assessing a toddler who has clinical manifestations of
severe dehydration. Which of the following findings should the
nurse expect?
A. Capillary refill of 2 seconds
B. Tachycardia and sunken anterior fontanel
C. Moist mucous membranes and brisk skin turgor
D. Increased blood pressure and bounding peripheral pulses
Correct Answer: B
Rationale: Severe dehydration in a toddler manifests as significant
intravascular volume depletion leading to tachycardia, hypotension
(late sign), sunken anterior fontanel, dry mucous membranes,
tenting/poor skin turgor, deep tachypnea, oliguria or anuria, and
capillary refill greater than 4 seconds. Moist membranes and brisk
turgor indicate normal hydration.
,(2) A nurse is caring for an 18-month-old toddler admitted with
severe dehydration secondary to acute gastroenteritis. Which initial
prescription should the nurse anticipate and prepare for?
A. Administering an immediate oral rehydration solution (ORS) of
150 mL/kg over 4 hours
B. Initiating an IV bolus of 0.9% sodium chloride at 20 mL/kg rapidly
C. Administering a bolus of 5% Dextrose in water (D5W)
subcutaneously
D. Restricting all fluid intake for 8 hours to rest the gastrointestinal
tract
Correct Answer: B
Rationale: For a toddler with severe dehydration exhibiting
hemodynamic instability or shock, rapid IV fluid resuscitation with an
isotonic crystalloid solution (such as 0.9% sodium chloride or
lactated Ringer's) at 20 mL/kg is the standard initial emergency
intervention. Oral rehydration is indicated for mild to moderate
dehydration. D5W is hypotonic and contraindicated as an initial
resuscitation fluid.
(3) When monitoring a toddler receiving IV fluid resuscitation for
severe dehydration, which assessment finding best indicates effective
therapeutic response?
A. Urine output greater than 1 mL/kg/hr
B. Presence of tears when crying
C. Heart rate increasing from baseline by 20 beats/min
, D. Serum sodium level of 160 mEq/L
Correct Answer: A
Rationale: Adequate urine output (>1 mL/kg/hr in infants and
toddlers) is the single most reliable indicator of restored renal
perfusion and effective intravascular volume resuscitation. While tear
production and heart rate normalization are important, urine output
confirms renal recovery. Serum sodium of 160 mEq/L indicates
severe hypernatremia.
(4) A nurse is evaluating laboratory results for a toddler admitted
with severe dehydration from rotavirus. Which of the following lab
values is consistent with severe dehydration?
A. Specific gravity 1.002
B. Hematocrit 32%
C. Blood urea nitrogen (BUN) 35 mg/dL
D. Serum bicarbonate 26 mEq/L
Correct Answer: C
Rationale: Hemoconcentration occurs with severe dehydration,
leading to elevated BUN (normal toddler BUN is roughly 5–18
mg/dL) and elevated creatinine due to prerenal azotemia. Specific
gravity would be elevated (>1.030), hematocrit would be elevated,
and serum bicarbonate would be decreased due to metabolic acidosis
from diarrhea and dehydration.
, (5) A toddler with severe dehydration is noted to have deep, rapid
respirations (Kussmaul breathing) without signs of respiratory
distress. The nurse recognizes this breathing pattern as a
compensatory mechanism for which acid-base imbalance?
A. Respiratory alkalosis
B. Metabolic acidosis
C. Respiratory acidosis
D. Metabolic alkalosis
Correct Answer: B
Rationale: Severe dehydration and diarrhea in toddlers commonly
cause metabolic acidosis due to loss of bicarbonate-rich intestinal
fluids and lactic acid accumulation from poor tissue perfusion.
Kussmaul respirations represent the respiratory system's attempt to
compensate by blowing off carbon dioxide (an acid) to raise blood
pH.
(6) Question 6: A nurse is providing comprehensive nursing care for
a pediatric client presenting with clinical manifestations related to
fluid balance and systemic perfusion. Which of the following
assessments or interventions is priority for this client?
A. Monitor vital signs every 15 minutes and assess peripheral
perfusion.
B. Administer prescribed hypotonic maintenance intravenous fluids
immediately.
