BSN HESI 266 Med Surg Exam Prep Document | 2026/2027
Edition | 250 Verified Questions
BSN HESI 266 Med Surg Exam 2026-2027 QUESTIONS AND ANSWERS ALREADY
GRADED A+. 100% Verified Solutions | Updated Per Latest Guidelines | Graded A+
This comprehensive exam preparation guide for BSN HESI 266 Medical-Surgical Nursing features 250
verified questions and answers, meticulously updated for the 2026/2027 academic year. Designed to
ensure a 100% pass rate, each question is aligned with current HESI exam blueprints and
evidence-based practice standards. The guide covers critical content areas including perioperative care,
fluid and electrolyte balance, cardiovascular disorders, respiratory management, and neurological
emergencies. Ideal for Nightingale College students, this resource provides rationales and distractors to
deepen clinical reasoning.
Key Features:
Perioperative Nursing Care
Fluid & Electrolyte Imbalances
Cardiovascular & Respiratory Disorders
Neurological & Endocrine Emergencies
Renal & Gastrointestinal Systems
Oncology & Hematology Management
Updates for 2026:
- Updated to reflect 2026/2027 HESI exam blueprint changes
- Incorporated latest evidence-based practice guidelines
- Revised rationales with expanded distractor explanations
- Added new questions on COVID-19 sequelae and telehealth nursing
- Enhanced focus on prioritization and delegation scenarios
Abstract:
This 2026/2027 edition of the BSN HESI 266 Medical-Surgical Exam Prep Guide provides 250 verified questions
and answers, meticulously curated to reflect the latest HESI exam content and nursing standards. Each question is
accompanied by a detailed rationale explaining the correct answer and analyzing common distractors, fostering
critical thinking and clinical judgment. The guide is organized by body system and nursing process, with emphasis
on high-yield topics such as fluid and electrolyte management, perioperative complications, cardiovascular
emergencies, and respiratory failure. Updated to include emerging issues like COVID-19 management and
telehealth nursing, this resource ensures comprehensive coverage of medical-surgical nursing. Designed for
Nightingale College students, it aligns with course objectives and NCLEX-RN competencies, offering a structured
approach to exam preparation. The answer format includes step-by-step reasoning, prioritization frameworks, and
evidence-based citations, enabling learners to apply knowledge in clinical scenarios. With a focus on safety and
patient-centered care, this guide serves as a definitive tool for achieving a top score on the HESI 266 exam.
Keywords:
HESI 266, Med Surg Exam, Nightingale College, Medical-Surgical Nursing, Verified Questions, 2026/2027
Update, NCLEX Prep, Clinical Reasoning
Answer Format:
Each question includes the correct answer, a detailed rationale explaining the underlying pathophysiology and
nursing interventions, and an analysis of common distractors. Rationales are structured to reinforce clinical
reasoning, with step-by-step explanations and evidence-based citations. This format helps students understand why
the correct answer is right and why others are wrong, promoting deep learning.
Page 1
,Compliance Checklist:
Aligned with 2026/2027 HESI exam blueprints
Based on latest evidence-based practice guidelines
Reviewed by subject matter experts for accuracy
Includes rationales and distractor analysis for each question
Covers all major medical-surgical nursing content areas
Designed to support 100% pass rate guarantee
Content Area Overview:
Content Area Questions Key Topics Weight
Perioperative Nursing 1-30 Preoperative assessment, intraoperative 12%
complications, postoperative care, pain
management, wound healing
Fluid & Electrolyte Balance 31-60 Dehydration, overhydration, sodium and 12%
potassium imbalances, acid-base disorders,
IV therapy
Cardiovascular Disorders 61-100 Heart failure, myocardial infarction, 16%
arrhythmias, hypertension, peripheral
vascular disease
Respiratory Disorders 101-135 COPD, pneumonia, asthma, pulmonary 14%
embolism, acute respiratory distress
syndrome
Neurological Emergencies 136-165 Stroke, traumatic brain injury, seizures, 12%
meningitis, increased intracranial pressure
Endocrine & Metabolic 166-190 Diabetes mellitus, thyroid disorders, adrenal 10%
insufficiency, electrolyte imbalances
Renal & Gastrointestinal 191-220 Acute kidney injury, chronic kidney disease, 12%
GI bleeding, pancreatitis, liver cirrhosis
Oncology & Hematology 221-250 Cancer treatments, chemotherapy side 12%
effects, anemia, coagulopathies, transfusion
reactions
Page 2
,Q1. A patient receiving furosemide for heart failure develops a serum potassium level of 3.2 mEq/L. The
nurse reviews the medication orders. Which order should the nurse question?
A. Digoxin 0.25 mg PO daily
B. Spironolactone 25 mg PO daily
C. Potassium chloride 20 mEq PO daily
D. Lisinopril 10 mg PO daily
Correct Answer: A. Digoxin 0.25 mg PO daily
Rationale: Hypokalemia increases the risk of digoxin toxicity because potassium competes with digoxin for binding
sites on the Na+/K+ ATPase pump. With low potassium, digoxin binds more readily, precipitating toxicity.
Spironolactone is potassium-sparing and appropriate. Potassium replacement and lisinopril are safe or beneficial.
Why Wrong:
B - Spironolactone is a potassium-sparing diuretic and would not exacerbate hypokalemia; it may even help
conserve potassium.
C - Potassium chloride is indicated to correct hypokalemia and is appropriate in this setting.
D - Lisinopril, an ACE inhibitor, can cause hyperkalemia but is not contraindicated with hypokalemia; it may
actually help prevent excessive potassium loss.
Reference: Lehne, R.A. (2026). Pharmacology for Nursing Care, 12th Ed., Ch. 24, 44.
Q2. A patient with chronic obstructive pulmonary disease (COPD) has an arterial blood gas (ABG) result:
pH 7.32, PaCO2 58 mm Hg, PaO2 70 mm Hg, HCO3- 30 mEq/L. The nurse interprets these findings as
which acid-base imbalance?
A. Metabolic acidosis with partial respiratory compensation
B. Respiratory acidosis with metabolic alkalosis
C. Respiratory acidosis with metabolic compensation
D. Metabolic alkalosis with respiratory compensation
Correct Answer: C. Respiratory acidosis with metabolic compensation
Rationale: The pH is acidic (7.32), PaCO2 is elevated (58 mm Hg) indicating respiratory acidosis. The HCO3- is
elevated (30 mEq/L) suggesting metabolic compensation (renal retention of bicarbonate) that has occurred over
days. This is a chronic respiratory acidosis with metabolic compensation, not a mixed disorder.
Why Wrong:
A - Metabolic acidosis would show low pH and low HCO3-, not elevated HCO3-. The primary disturbance is
respiratory, not metabolic.
B - Respiratory acidosis is present, but the elevated HCO3- is compensation, not a separate metabolic
alkalosis. In mixed disorders, the pH would be closer to normal or alkalotic.
D - Metabolic alkalosis would show elevated pH and HCO3-, not acidic pH. The primary disturbance is
respiratory acidosis.
Reference: Ignatavicius, D.D., Workman, M.L. (2026). Medical-Surgical Nursing: Concepts for Interprofessional
Collaborative Care, 10th Ed., Ch. 16.
Q3. A patient with acute pancreatitis develops severe abdominal pain, nausea, and vomiting. The nurse notes
a positive Cullen's sign and Grey Turner's sign. Which pathophysiological mechanism most likely explains
these findings?
A. Retroperitoneal hemorrhage tracking along fascial planes
B. Intra-abdominal infection causing peritonitis
C. Obstruction of the common bile duct by a gallstone
D. Release of pancreatic enzymes causing fat necrosis and saponification
Correct Answer: A. Retroperitoneal hemorrhage tracking along fascial planes
Rationale: Cullen's sign (periumbilical ecchymosis) and Grey Turner's sign (flank ecchymosis) indicate
retroperitoneal hemorrhage, often from severe necrotizing pancreatitis. Blood tracks from the retroperitoneum
Page 3
, along fascial planes to the umbilicus and flanks. This is a sign of hemorrhagic pancreatitis and carries high
mortality.
Why Wrong:
B - Peritonitis would cause diffuse abdominal tenderness and rigidity, not specific ecchymosis patterns. Cullen's and
Grey Turner's signs are hemorrhagic, not infectious.
C - Common bile duct obstruction can cause jaundice and dark urine but does not produce ecchymosis. These signs are
specific to retroperitoneal bleeding.
D - Fat necrosis and saponification are characteristic of pancreatitis but do not cause ecchymosis. They may produce
hypocalcemia but not these skin signs.
Reference: Ignatavicius, D.D., Workman, M.L. (2026). Medical-Surgical Nursing, 10th Ed., Ch. 52.
Q4. A patient with type 2 diabetes mellitus is started on metformin. The nurse provides education about the
medication. Which statement by the patient indicates a correct understanding?
A. I should take this medication on an empty stomach to increase absorption.
B. I need to avoid alcohol because it increases the risk of lactic acidosis.
C. This medication works by increasing insulin secretion from the pancreas.
D. I should stop taking this medication if my blood sugar levels are normal.
Correct Answer: B. I need to avoid alcohol because it increases the risk of lactic acidosis.
Rationale: Metformin is contraindicated with excessive alcohol use due to increased risk of lactic acidosis, a rare
but serious adverse effect. Metformin should be taken with meals to reduce gastrointestinal side effects. It works by
decreasing hepatic glucose production and improving insulin sensitivity, not by increasing insulin secretion. It
should be continued even if blood sugar normalizes, as it is a maintenance therapy.
Why Wrong:
A - Metformin should be taken with meals to minimize GI upset; taking on an empty stomach increases side
effects.
C - Metformin does not stimulate insulin secretion; it works primarily by reducing hepatic gluconeogenesis
and improving peripheral insulin sensitivity.
D - Metformin is a chronic medication for diabetes management; discontinuing it when blood sugar
normalizes would lead to loss of glycemic control.
Reference: Lehne, R.A. (2026). Pharmacology for Nursing Care, 12th Ed., Ch. 47.
Q5. A patient with acute kidney injury (AKI) due to prerenal causes has the following laboratory values:
BUN 45 mg/dL, serum creatinine 2.1 mg/dL, urine sodium 15 mEq/L, fractional excretion of sodium (FENa)
0.8%. The nurse anticipates which intervention?
A. Administer intravenous normal saline bolus
B. Prepare the patient for hemodialysis
C. Administer furosemide to promote diuresis
D. Restrict fluid intake to 500 mL/day
Correct Answer: A. Administer intravenous normal saline bolus
Rationale: Low urine sodium (<20 mEq/L) and low FENa (<1%) indicate prerenal AKI, where the kidneys are
hypoperfused but intact. The priority is to restore renal perfusion with intravenous fluids (e.g., normal saline).
Hemodialysis is not indicated without severe hyperkalemia, acidosis, or uremia. Diuretics are contraindicated in
prerenal AKI as they worsen hypovolemia. Fluid restriction is for fluid overload, not prerenal causes.
Why Wrong:
B - Hemodialysis is reserved for severe AKI with complications like hyperkalemia, metabolic acidosis, or
uremic symptoms; not indicated in prerenal AKI without these.
C - Furosemide would further deplete intravascular volume, worsening prerenal AKI. It may be used after
volume repletion if oliguria persists.
Page 4
Edition | 250 Verified Questions
BSN HESI 266 Med Surg Exam 2026-2027 QUESTIONS AND ANSWERS ALREADY
GRADED A+. 100% Verified Solutions | Updated Per Latest Guidelines | Graded A+
This comprehensive exam preparation guide for BSN HESI 266 Medical-Surgical Nursing features 250
verified questions and answers, meticulously updated for the 2026/2027 academic year. Designed to
ensure a 100% pass rate, each question is aligned with current HESI exam blueprints and
evidence-based practice standards. The guide covers critical content areas including perioperative care,
fluid and electrolyte balance, cardiovascular disorders, respiratory management, and neurological
emergencies. Ideal for Nightingale College students, this resource provides rationales and distractors to
deepen clinical reasoning.
Key Features:
Perioperative Nursing Care
Fluid & Electrolyte Imbalances
Cardiovascular & Respiratory Disorders
Neurological & Endocrine Emergencies
Renal & Gastrointestinal Systems
Oncology & Hematology Management
Updates for 2026:
- Updated to reflect 2026/2027 HESI exam blueprint changes
- Incorporated latest evidence-based practice guidelines
- Revised rationales with expanded distractor explanations
- Added new questions on COVID-19 sequelae and telehealth nursing
- Enhanced focus on prioritization and delegation scenarios
Abstract:
This 2026/2027 edition of the BSN HESI 266 Medical-Surgical Exam Prep Guide provides 250 verified questions
and answers, meticulously curated to reflect the latest HESI exam content and nursing standards. Each question is
accompanied by a detailed rationale explaining the correct answer and analyzing common distractors, fostering
critical thinking and clinical judgment. The guide is organized by body system and nursing process, with emphasis
on high-yield topics such as fluid and electrolyte management, perioperative complications, cardiovascular
emergencies, and respiratory failure. Updated to include emerging issues like COVID-19 management and
telehealth nursing, this resource ensures comprehensive coverage of medical-surgical nursing. Designed for
Nightingale College students, it aligns with course objectives and NCLEX-RN competencies, offering a structured
approach to exam preparation. The answer format includes step-by-step reasoning, prioritization frameworks, and
evidence-based citations, enabling learners to apply knowledge in clinical scenarios. With a focus on safety and
patient-centered care, this guide serves as a definitive tool for achieving a top score on the HESI 266 exam.
Keywords:
HESI 266, Med Surg Exam, Nightingale College, Medical-Surgical Nursing, Verified Questions, 2026/2027
Update, NCLEX Prep, Clinical Reasoning
Answer Format:
Each question includes the correct answer, a detailed rationale explaining the underlying pathophysiology and
nursing interventions, and an analysis of common distractors. Rationales are structured to reinforce clinical
reasoning, with step-by-step explanations and evidence-based citations. This format helps students understand why
the correct answer is right and why others are wrong, promoting deep learning.
Page 1
,Compliance Checklist:
Aligned with 2026/2027 HESI exam blueprints
Based on latest evidence-based practice guidelines
Reviewed by subject matter experts for accuracy
Includes rationales and distractor analysis for each question
Covers all major medical-surgical nursing content areas
Designed to support 100% pass rate guarantee
Content Area Overview:
Content Area Questions Key Topics Weight
Perioperative Nursing 1-30 Preoperative assessment, intraoperative 12%
complications, postoperative care, pain
management, wound healing
Fluid & Electrolyte Balance 31-60 Dehydration, overhydration, sodium and 12%
potassium imbalances, acid-base disorders,
IV therapy
Cardiovascular Disorders 61-100 Heart failure, myocardial infarction, 16%
arrhythmias, hypertension, peripheral
vascular disease
Respiratory Disorders 101-135 COPD, pneumonia, asthma, pulmonary 14%
embolism, acute respiratory distress
syndrome
Neurological Emergencies 136-165 Stroke, traumatic brain injury, seizures, 12%
meningitis, increased intracranial pressure
Endocrine & Metabolic 166-190 Diabetes mellitus, thyroid disorders, adrenal 10%
insufficiency, electrolyte imbalances
Renal & Gastrointestinal 191-220 Acute kidney injury, chronic kidney disease, 12%
GI bleeding, pancreatitis, liver cirrhosis
Oncology & Hematology 221-250 Cancer treatments, chemotherapy side 12%
effects, anemia, coagulopathies, transfusion
reactions
Page 2
,Q1. A patient receiving furosemide for heart failure develops a serum potassium level of 3.2 mEq/L. The
nurse reviews the medication orders. Which order should the nurse question?
A. Digoxin 0.25 mg PO daily
B. Spironolactone 25 mg PO daily
C. Potassium chloride 20 mEq PO daily
D. Lisinopril 10 mg PO daily
Correct Answer: A. Digoxin 0.25 mg PO daily
Rationale: Hypokalemia increases the risk of digoxin toxicity because potassium competes with digoxin for binding
sites on the Na+/K+ ATPase pump. With low potassium, digoxin binds more readily, precipitating toxicity.
Spironolactone is potassium-sparing and appropriate. Potassium replacement and lisinopril are safe or beneficial.
Why Wrong:
B - Spironolactone is a potassium-sparing diuretic and would not exacerbate hypokalemia; it may even help
conserve potassium.
C - Potassium chloride is indicated to correct hypokalemia and is appropriate in this setting.
D - Lisinopril, an ACE inhibitor, can cause hyperkalemia but is not contraindicated with hypokalemia; it may
actually help prevent excessive potassium loss.
Reference: Lehne, R.A. (2026). Pharmacology for Nursing Care, 12th Ed., Ch. 24, 44.
Q2. A patient with chronic obstructive pulmonary disease (COPD) has an arterial blood gas (ABG) result:
pH 7.32, PaCO2 58 mm Hg, PaO2 70 mm Hg, HCO3- 30 mEq/L. The nurse interprets these findings as
which acid-base imbalance?
A. Metabolic acidosis with partial respiratory compensation
B. Respiratory acidosis with metabolic alkalosis
C. Respiratory acidosis with metabolic compensation
D. Metabolic alkalosis with respiratory compensation
Correct Answer: C. Respiratory acidosis with metabolic compensation
Rationale: The pH is acidic (7.32), PaCO2 is elevated (58 mm Hg) indicating respiratory acidosis. The HCO3- is
elevated (30 mEq/L) suggesting metabolic compensation (renal retention of bicarbonate) that has occurred over
days. This is a chronic respiratory acidosis with metabolic compensation, not a mixed disorder.
Why Wrong:
A - Metabolic acidosis would show low pH and low HCO3-, not elevated HCO3-. The primary disturbance is
respiratory, not metabolic.
B - Respiratory acidosis is present, but the elevated HCO3- is compensation, not a separate metabolic
alkalosis. In mixed disorders, the pH would be closer to normal or alkalotic.
D - Metabolic alkalosis would show elevated pH and HCO3-, not acidic pH. The primary disturbance is
respiratory acidosis.
Reference: Ignatavicius, D.D., Workman, M.L. (2026). Medical-Surgical Nursing: Concepts for Interprofessional
Collaborative Care, 10th Ed., Ch. 16.
Q3. A patient with acute pancreatitis develops severe abdominal pain, nausea, and vomiting. The nurse notes
a positive Cullen's sign and Grey Turner's sign. Which pathophysiological mechanism most likely explains
these findings?
A. Retroperitoneal hemorrhage tracking along fascial planes
B. Intra-abdominal infection causing peritonitis
C. Obstruction of the common bile duct by a gallstone
D. Release of pancreatic enzymes causing fat necrosis and saponification
Correct Answer: A. Retroperitoneal hemorrhage tracking along fascial planes
Rationale: Cullen's sign (periumbilical ecchymosis) and Grey Turner's sign (flank ecchymosis) indicate
retroperitoneal hemorrhage, often from severe necrotizing pancreatitis. Blood tracks from the retroperitoneum
Page 3
, along fascial planes to the umbilicus and flanks. This is a sign of hemorrhagic pancreatitis and carries high
mortality.
Why Wrong:
B - Peritonitis would cause diffuse abdominal tenderness and rigidity, not specific ecchymosis patterns. Cullen's and
Grey Turner's signs are hemorrhagic, not infectious.
C - Common bile duct obstruction can cause jaundice and dark urine but does not produce ecchymosis. These signs are
specific to retroperitoneal bleeding.
D - Fat necrosis and saponification are characteristic of pancreatitis but do not cause ecchymosis. They may produce
hypocalcemia but not these skin signs.
Reference: Ignatavicius, D.D., Workman, M.L. (2026). Medical-Surgical Nursing, 10th Ed., Ch. 52.
Q4. A patient with type 2 diabetes mellitus is started on metformin. The nurse provides education about the
medication. Which statement by the patient indicates a correct understanding?
A. I should take this medication on an empty stomach to increase absorption.
B. I need to avoid alcohol because it increases the risk of lactic acidosis.
C. This medication works by increasing insulin secretion from the pancreas.
D. I should stop taking this medication if my blood sugar levels are normal.
Correct Answer: B. I need to avoid alcohol because it increases the risk of lactic acidosis.
Rationale: Metformin is contraindicated with excessive alcohol use due to increased risk of lactic acidosis, a rare
but serious adverse effect. Metformin should be taken with meals to reduce gastrointestinal side effects. It works by
decreasing hepatic glucose production and improving insulin sensitivity, not by increasing insulin secretion. It
should be continued even if blood sugar normalizes, as it is a maintenance therapy.
Why Wrong:
A - Metformin should be taken with meals to minimize GI upset; taking on an empty stomach increases side
effects.
C - Metformin does not stimulate insulin secretion; it works primarily by reducing hepatic gluconeogenesis
and improving peripheral insulin sensitivity.
D - Metformin is a chronic medication for diabetes management; discontinuing it when blood sugar
normalizes would lead to loss of glycemic control.
Reference: Lehne, R.A. (2026). Pharmacology for Nursing Care, 12th Ed., Ch. 47.
Q5. A patient with acute kidney injury (AKI) due to prerenal causes has the following laboratory values:
BUN 45 mg/dL, serum creatinine 2.1 mg/dL, urine sodium 15 mEq/L, fractional excretion of sodium (FENa)
0.8%. The nurse anticipates which intervention?
A. Administer intravenous normal saline bolus
B. Prepare the patient for hemodialysis
C. Administer furosemide to promote diuresis
D. Restrict fluid intake to 500 mL/day
Correct Answer: A. Administer intravenous normal saline bolus
Rationale: Low urine sodium (<20 mEq/L) and low FENa (<1%) indicate prerenal AKI, where the kidneys are
hypoperfused but intact. The priority is to restore renal perfusion with intravenous fluids (e.g., normal saline).
Hemodialysis is not indicated without severe hyperkalemia, acidosis, or uremia. Diuretics are contraindicated in
prerenal AKI as they worsen hypovolemia. Fluid restriction is for fluid overload, not prerenal causes.
Why Wrong:
B - Hemodialysis is reserved for severe AKI with complications like hyperkalemia, metabolic acidosis, or
uremic symptoms; not indicated in prerenal AKI without these.
C - Furosemide would further deplete intravascular volume, worsening prerenal AKI. It may be used after
volume repletion if oliguria persists.
Page 4
