Rationales (Latest Update) 2026
Maximize your chances of passing the HESI RN Exit Exam on your very first try with
this comprehensive question prep pack. This document features Next-Generation
NCLEX (NGN) style multiple-choice questions spanning critical clinical specialties,
including Med-Surg, Pediatrics, Maternity, Pharmacology, and Mental Health. Every
single question includes the correct answer clearly marked in bold italics along with an
incredibly detailed, comprehensive rationale explaining why the correct choice is right
and why the distractors are incorrect. Perfectly spaced and professionally formatted for
rapid review, active active testing, or immediate integration into your nursing study
guides. Master prioritization, critical lab values, and clinical judgment today!
Question 1
A client with a history of deep vein thrombosis (DVT) is admitted with sudden-onset
pleuritic chest pain, tachypnoea, and dyspnoea. Which prescription should the nurse
implement first?
• (A) Obtain an electrocardiogram (ECG) to rule out myocardial infarction.
• (B) Initiate an intravenous unfractionated heparin infusion.
• (C) Administer oxygen therapy via nasal cannula to maintain saturation above
92%.
• (D) Schedule a computed tomography pulmonary angiography (CTPA).
Correct Answer: (C) Administer oxygen therapy via nasal cannula to maintain
saturation above 92%.
Rationale: The client's clinical presentation strongly suggests a pulmonary embolism
(PE), a life-threatening complication of DVT. Applying the ABC (Airway, Breathing,
Circulation) framework, optimizing oxygenation and gas exchange is the immediate
priority to stabilize the client before diagnostics or therapeutic anticoagulation are
initiated.
Question 2
,A nurse is caring for an infant diagnosed with tetralogy of Fallot who suddenly becomes
cyanotic, tachypnoeic, and extremely agitated during a blood draw. Which action should
the nurse take first?
• (A) Administer a prescribed dose of intravenous morphine sulfate.
• (B) Place the infant in a knee-to-chest position.
• (C) Apply a high-flow oxygen face mask.
• (D) Prepare for immediate endotracheal intubation.
Correct Answer: (B) Place the infant in a knee-to-chest position.
Rationale: The infant is experiencing a hypercyanotic spell ("tet spell"). Placing the
infant in a knee-to-chest position increases systemic vascular resistance, which reduces
the right-to-left shunting of deoxygenated blood across the ventricular septal defect,
forcing more blood into the pulmonary artery to improve oxygenation.
Question 3
The nurse is reviewing morning laboratory results for a client receiving a continuous
intravenous heparin infusion for a proximal deep vein thrombosis. The client's baseline
platelet count was \(210,000/\text{mm}^3\), and today's platelet count is
\(95,000/\text{mm}^3\). Which action should the nurse take first?
• (A) Stop the heparin infusion immediately and notify the healthcare provider.
• (B) Redraw the blood specimen to confirm potential laboratory error.
• (C) Check the activated partial thromboplastin time (aPTT) to adjust the dose.
• (D) Assess the client for visible petechiae, ecchymosis, or hematuria.
Correct Answer: (A) Stop the heparin infusion immediately and notify the
healthcare provider.
Rationale: A drop in platelet count by more than 50% from baseline indicates Heparin-
Induced Thrombocytopenia (HIT). This is a life-threatening, immune-mediated reaction
that paradoxically increases the risk of severe thromboembolism. The immediate
intervention is to discontinue all heparin products.
,Question 4
A nurse is preparing to administer medications to a client diagnosed with chronic kidney
disease (CKD) stage 5. The client's laboratory results reveal a serum potassium level of
6.2 mEq/L. Which medication prescription should the nurse question?
• (A) Sodium polystyrene sulfonate 15 g orally.
• (B) Epoetin alfa 4,000 units subcutaneously.
• (C) Spironolactone 25 mg orally.
• (D) Calcium gluconate 1 g intravenously.
Correct Answer: (C) Spironolactone 25 mg orally.
Rationale: Spironolactone is a potassium-sparing diuretic. Administering it to a client
who already has severe hyperkalemia (potassium > 5.0 mEq/L) and advanced kidney
disease will exacerbate the hyperkalemia, dangerously increasing the risk of lethal
cardiac arrhythmias.
Question 5
An older adult client with severe osteoarthritis is prescribed celecoxib for pain
management. Which underlying medical condition in the client's history should prompt
the nurse to clarify this prescription with the healthcare provider?
• (A) Chronic low back pain.
• (B) Recent acute myocardial infarction.
• (C) Open-angle glaucoma.
• (D) Hypothyroidism.
Correct Answer: (B) Recent acute myocardial infarction.
Rationale: Celecoxib is a selective COX-2 inhibitor (NSAID). COX-2 inhibitors carry a
boxed warning due to a significantly increased risk of cardiovascular thrombotic events,
, myocardial infarction, and stroke. They are contraindicated immediately following a
myocardial infarction or coronary artery bypass graft surgery.
Question 6
A nurse on a psychiatric unit is caring for a client with schizophrenia who is
experiencing an acute auditory hallucination. The client states, "The voices are telling
me to hurt the person in the next room!" Which response by the nurse is therapeutic?
• (A) "There is nobody in the next room, and no one is talking to you."
• (B) "I understand the voices are real to you, but I do not hear any voices. You are
safe here."
• (C) "Why do you think the voices want you to hurt that person?"
• (D) "Let's ignore the voices and go to the dayroom to watch television."
Correct Answer: (B) "I understand the voices are real to you, but I do not hear any
voices. You are safe here."
Rationale: This response validates the client's feelings and reality without reinforcing the
hallucination. It presents the nurse's reality clearly and provides immediate reassurance
regarding safety, which is essential during command hallucinations.
Question 7
A client is admitted with severe preeclampsia at 34 weeks gestation. The nurse is
monitoring the client during a continuous intravenous infusion of magnesium sulfate.
Which clinical finding indicates magnesium sulfate toxicity?
• (A) Deep tendon reflexes of 1+ patellar.
• (B) Respiratory rate of 10 breaths per minute.
• (C) Hourly urine output of 45 mL.
• (D) Serum magnesium level of 5.0 mEq/L.