RN ATI CONCEPT-BASED ASSESSMENT LEVEL 1
PROCTORED EXAM| Fall 2026/2027 Updated Test Bank — 188
Questions and Answers Already Graded A+ Premium Exam
Tested And Verified
Subject Area RN ATI CONCEPT-BASED ASSESSMENT LEVEL 1 PROCTORED
EXAM| Fall 2026/2027 Updated Test Bank
Description Comprehensive examination on RN ATI CONCEPT-BASED ASSESSMENT
LEVEL 1 PROCTORED EXAM| Fall 2026/2027 Updated Test Bank.
Expected Grade A+
Total Questions 50
Duration 3 hours
Learning Outcomes 1. Demonstrate mastery of core concepts
Accreditation Aligned with US university standards.
Page 1
,1. A patient with chronic kidney disease (CKD) stage 4 develops hyperkalemia (K+
6.2 mEq/L) and metabolic acidosis (pH 7.30, HCO3- 16 mEq/L). The provider orders
sodium polystyrene sulfonate (Kayexalate) and intravenous sodium bicarbonate.
Which of the following mechanisms best explains the synergistic effect of this
combination?
A. Sodium bicarbonate shifts potassium intracellularly via insulin release, while Kayexalate
exchanges sodium for potassium in the colon.
B. Sodium bicarbonate corrects acidosis, reducing hydrogen-potassium exchange, while
Kayexalate binds potassium in the gut.
C. Sodium bicarbonate directly chelates potassium in the blood, while Kayexalate adsorbs
potassium in the small intestine.
D. Sodium bicarbonate alkalinizes the urine, increasing potassium excretion, while
Kayexalate causes osmotic diarrhea.
Answer: B. Sodium bicarbonate corrects acidosis, reducing hydrogen-potassium
exchange, while Kayexalate binds potassium in the gut.
Correct answer: B. Metabolic acidosis promotes intracellular hydrogen ion shift,
forcing potassium out of cells. Sodium bicarbonate corrects acidosis, allowing
potassium to re-enter cells. Kayexalate removes potassium via the gastrointestinal tract.
Option A is incorrect because sodium bicarbonate does not stimulate insulin release;
option C is incorrect because sodium bicarbonate does not chelate potassium; option D
is incorrect because Kayexalate does not cause osmotic diarrhea and sodium
bicarbonate does not primarily act via urine alkalinization in this context.
Page 2
,2. A patient receiving mechanical ventilation in the intensive care unit develops acute
respiratory distress syndrome (ARDS). The ventilator settings are: tidal volume 6
mL/kg ideal body weight, FiO2 0.8, PEEP 15 cm H2O, plateau pressure 28 cm H2O.
Arterial blood gas shows pH 7.25, PaCO2 55 mm Hg, PaO2 60 mm Hg. Which
intervention is most appropriate to improve oxygenation while minimizing
ventilator-induced lung injury?
A. Increase PEEP to 20 cm H2O and reassess plateau pressure.
B. Increase tidal volume to 8 mL/kg to improve ventilation and oxygenation.
C. Switch to pressure-controlled ventilation with a peak pressure of 35 cm H2O.
D. Administer inhaled nitric oxide at 20 ppm continuously.
Answer: A. Increase PEEP to 20 cm H2O and reassess plateau pressure.
Correct answer: A. In ARDS, lung-protective ventilation includes low tidal volumes and
adequate PEEP to recruit alveoli. Plateau pressure is currently 28 cm H2O, which is at
the upper limit of safety ("d30 cm H2O). Increasing PEEP to 20 cm H2O may improve
oxygenation by recruiting more alveoli, but plateau pressure must be monitored to
avoid exceeding 30 cm H2O. Option B (increasing tidal volume) would increase plateau
pressure and risk volutrauma. Option C (pressure-controlled ventilation with high peak
pressure) may cause barotrauma. Option D (inhaled nitric oxide) can improve
oxygenation but does not address the underlying lung injury and is not the first-line
intervention.
3. A patient with decompensated heart failure with reduced ejection fraction
(HFrEF) is started on intravenous nitroprusside. Which of the following adverse
effects requires immediate discontinuation of the infusion?
A. Reflex tachycardia and palpitations.
B. Methemoglobinemia with cyanosis.
C. Hypotension with mean arterial pressure 60 mm Hg.
D. Cyanide toxicity with metabolic acidosis and elevated lactate.
Answer: D. Cyanide toxicity with metabolic acidosis and elevated lactate.
Correct answer: D. Nitroprusside is metabolized to cyanide and thiocyanate. Cyanide
toxicity, manifested by metabolic acidosis and elevated lactate, is life-threatening and
requires immediate discontinuation. Option A (reflex tachycardia) is common and may
be managed with beta-blockers. Option B (methemoglobinemia) is rare and less acute.
Option C (hypotension) can be managed by dose reduction or fluids. Cyanide toxicity is
the most urgent adverse effect.
Page 3
, 4. A patient is admitted with suspected bacterial meningitis. Cerebrospinal fluid
(CSF) analysis shows: glucose 30 mg/dL (serum glucose 100 mg/dL), protein 200
mg/dL, white blood cells 1500/mm³ with 90% neutrophils. Gram stain shows
gram-negative diplococci. Which of the following antimicrobial regimens is most
appropriate for empiric therapy before culture results are available?
A. Ceftriaxone plus vancomycin.
B. Ampicillin plus gentamicin.
C. Metronidazole plus cefepime.
D. Doxycycline plus rifampin.
Answer: A. Ceftriaxone plus vancomycin.
Correct answer: A. The CSF findings (low glucose, high protein, neutrophilic
pleocytosis) are consistent with bacterial meningitis. Gram-negative diplococci suggest
Neisseria meningitidis. Empiric therapy for community-acquired bacterial meningitis
should cover Streptococcus pneumoniae, Neisseria meningitidis, and Listeria
monocytogenes (in certain populations). Ceftriaxone provides coverage for N.
meningitidis and S. pneumoniae, while vancomycin is added for penicillin-resistant S.
pneumoniae. Option B (ampicillin/gentamicin) is used for Listeria in neonates or
elderly, but not first-line here. Option C (metronidazole/cefepime) targets anaerobes
and Pseudomonas, not typical. Option D (doxycycline/rifampin) is for atypical
pathogens.
Page 4
PROCTORED EXAM| Fall 2026/2027 Updated Test Bank — 188
Questions and Answers Already Graded A+ Premium Exam
Tested And Verified
Subject Area RN ATI CONCEPT-BASED ASSESSMENT LEVEL 1 PROCTORED
EXAM| Fall 2026/2027 Updated Test Bank
Description Comprehensive examination on RN ATI CONCEPT-BASED ASSESSMENT
LEVEL 1 PROCTORED EXAM| Fall 2026/2027 Updated Test Bank.
Expected Grade A+
Total Questions 50
Duration 3 hours
Learning Outcomes 1. Demonstrate mastery of core concepts
Accreditation Aligned with US university standards.
Page 1
,1. A patient with chronic kidney disease (CKD) stage 4 develops hyperkalemia (K+
6.2 mEq/L) and metabolic acidosis (pH 7.30, HCO3- 16 mEq/L). The provider orders
sodium polystyrene sulfonate (Kayexalate) and intravenous sodium bicarbonate.
Which of the following mechanisms best explains the synergistic effect of this
combination?
A. Sodium bicarbonate shifts potassium intracellularly via insulin release, while Kayexalate
exchanges sodium for potassium in the colon.
B. Sodium bicarbonate corrects acidosis, reducing hydrogen-potassium exchange, while
Kayexalate binds potassium in the gut.
C. Sodium bicarbonate directly chelates potassium in the blood, while Kayexalate adsorbs
potassium in the small intestine.
D. Sodium bicarbonate alkalinizes the urine, increasing potassium excretion, while
Kayexalate causes osmotic diarrhea.
Answer: B. Sodium bicarbonate corrects acidosis, reducing hydrogen-potassium
exchange, while Kayexalate binds potassium in the gut.
Correct answer: B. Metabolic acidosis promotes intracellular hydrogen ion shift,
forcing potassium out of cells. Sodium bicarbonate corrects acidosis, allowing
potassium to re-enter cells. Kayexalate removes potassium via the gastrointestinal tract.
Option A is incorrect because sodium bicarbonate does not stimulate insulin release;
option C is incorrect because sodium bicarbonate does not chelate potassium; option D
is incorrect because Kayexalate does not cause osmotic diarrhea and sodium
bicarbonate does not primarily act via urine alkalinization in this context.
Page 2
,2. A patient receiving mechanical ventilation in the intensive care unit develops acute
respiratory distress syndrome (ARDS). The ventilator settings are: tidal volume 6
mL/kg ideal body weight, FiO2 0.8, PEEP 15 cm H2O, plateau pressure 28 cm H2O.
Arterial blood gas shows pH 7.25, PaCO2 55 mm Hg, PaO2 60 mm Hg. Which
intervention is most appropriate to improve oxygenation while minimizing
ventilator-induced lung injury?
A. Increase PEEP to 20 cm H2O and reassess plateau pressure.
B. Increase tidal volume to 8 mL/kg to improve ventilation and oxygenation.
C. Switch to pressure-controlled ventilation with a peak pressure of 35 cm H2O.
D. Administer inhaled nitric oxide at 20 ppm continuously.
Answer: A. Increase PEEP to 20 cm H2O and reassess plateau pressure.
Correct answer: A. In ARDS, lung-protective ventilation includes low tidal volumes and
adequate PEEP to recruit alveoli. Plateau pressure is currently 28 cm H2O, which is at
the upper limit of safety ("d30 cm H2O). Increasing PEEP to 20 cm H2O may improve
oxygenation by recruiting more alveoli, but plateau pressure must be monitored to
avoid exceeding 30 cm H2O. Option B (increasing tidal volume) would increase plateau
pressure and risk volutrauma. Option C (pressure-controlled ventilation with high peak
pressure) may cause barotrauma. Option D (inhaled nitric oxide) can improve
oxygenation but does not address the underlying lung injury and is not the first-line
intervention.
3. A patient with decompensated heart failure with reduced ejection fraction
(HFrEF) is started on intravenous nitroprusside. Which of the following adverse
effects requires immediate discontinuation of the infusion?
A. Reflex tachycardia and palpitations.
B. Methemoglobinemia with cyanosis.
C. Hypotension with mean arterial pressure 60 mm Hg.
D. Cyanide toxicity with metabolic acidosis and elevated lactate.
Answer: D. Cyanide toxicity with metabolic acidosis and elevated lactate.
Correct answer: D. Nitroprusside is metabolized to cyanide and thiocyanate. Cyanide
toxicity, manifested by metabolic acidosis and elevated lactate, is life-threatening and
requires immediate discontinuation. Option A (reflex tachycardia) is common and may
be managed with beta-blockers. Option B (methemoglobinemia) is rare and less acute.
Option C (hypotension) can be managed by dose reduction or fluids. Cyanide toxicity is
the most urgent adverse effect.
Page 3
, 4. A patient is admitted with suspected bacterial meningitis. Cerebrospinal fluid
(CSF) analysis shows: glucose 30 mg/dL (serum glucose 100 mg/dL), protein 200
mg/dL, white blood cells 1500/mm³ with 90% neutrophils. Gram stain shows
gram-negative diplococci. Which of the following antimicrobial regimens is most
appropriate for empiric therapy before culture results are available?
A. Ceftriaxone plus vancomycin.
B. Ampicillin plus gentamicin.
C. Metronidazole plus cefepime.
D. Doxycycline plus rifampin.
Answer: A. Ceftriaxone plus vancomycin.
Correct answer: A. The CSF findings (low glucose, high protein, neutrophilic
pleocytosis) are consistent with bacterial meningitis. Gram-negative diplococci suggest
Neisseria meningitidis. Empiric therapy for community-acquired bacterial meningitis
should cover Streptococcus pneumoniae, Neisseria meningitidis, and Listeria
monocytogenes (in certain populations). Ceftriaxone provides coverage for N.
meningitidis and S. pneumoniae, while vancomycin is added for penicillin-resistant S.
pneumoniae. Option B (ampicillin/gentamicin) is used for Listeria in neonates or
elderly, but not first-line here. Option C (metronidazole/cefepime) targets anaerobes
and Pseudomonas, not typical. Option D (doxycycline/rifampin) is for atypical
pathogens.
Page 4
