ATI CRITICAL THINKING EXAM 2026
COMPLETE EXAM QUESTIONS AND ACCURATE
ANSWERS |ALREADY PASSED!!
DOMAIN 1: INFERENCE & INTERPRETATION (10 Questions)
Question 1 (Multiple-Choice)
A nurse is reviewing the morning assessment data for four patients on a medical-surgical unit.
Which inference is most supported by the available evidence?
Patient A: Post-op day 2 after appendectomy; pain 3/10; temp 99.2°F; WBC 9,500/mm³; incision
clean, dry, intact
Patient B: Admitted yesterday with pneumonia; temp 102.4°F; RR 24; SpO₂ 92% on 2L NC;
productive cough with rust-colored sputum
Patient C: New admission with heart failure; BP 168/94; HR 88; 2+ pitting edema bilateral lower
extremities; reports sleeping on 3 pillows
Patient D: Diabetic patient; fasting glucose 142 mg/dL; HbA1c 7.2%; states "I feel fine today"
A. Patient A is developing a postoperative infection based on the elevated WBC count
B. Patient B is responding appropriately to antibiotic therapy as evidenced by the productive
cough
C. Patient C is experiencing decompensated heart failure with fluid volume overload
D. Patient D requires immediate insulin administration due to hyperglycemic crisis
[CORRECT: C]
Rationale: Patient C presents multiple converging data points supporting the inference of
decompensated heart failure: elevated blood pressure (168/94), bilateral pitting edema (2+),
and orthopnea (sleeping on 3 pillows). These findings collectively indicate fluid volume overload
and cardiac decompensation. The cognitive skill assessed is inference—drawing a logical
conclusion that extends beyond any single data point by synthesizing multiple clinical cues into
a coherent clinical picture.
Question 2 (Multiple-Choice)
,A nurse enters a patient's room and observes the following: the patient is diaphoretic, skin is
cool and clammy, the cardiac monitor shows sinus tachycardia at 118 bpm, and the patient
states, "I feel like I'm going to pass out." The patient's morning vital signs were BP 132/78, HR
76, RR 16, SpO₂ 97% on room air. Which inference is most justified?
A. The patient is experiencing an acute anxiety attack
B. The patient is having a myocardial infarction
C. The patient is developing hypovolemic shock
D. The patient is experiencing orthostatic hypotension
[CORRECT: C]
Rationale: The clinical presentation—diaphoresis, cool/clammy skin, tachycardia (118 bpm, up
from 76), and presyncope—forms a pattern consistent with the early compensatory phase of
hypovolemic shock. While myocardial infarction is possible, there is no chest pain or ECG
changes described. Anxiety alone does not explain the cool, clammy skin or significant
tachycardia. Orthostatic hypotension requires positional vital sign comparison not provided. The
cognitive skill assessed is inference—recognizing a pattern of physiological compensation and
drawing the most evidence-supported conclusion.
Question 3 (SATA)
A nurse reviews the following data for a patient admitted with acute pancreatitis. Which
inferences are supported by the clinical evidence? Select all that apply.
• A. The patient's lipase level of 1,850 U/L supports the diagnosis of acute pancreatitis
• B. The patient's severe epigastric pain radiating to the back indicates possible pancreatic
necrosis
• C. The patient's calcium level of 7.8 mg/dL suggests a poor prognosis
• D. The patient's blood glucose of 210 mg/dL is unrelated to the pancreatic inflammation
• E. The patient's Cullen's sign (periumbilical ecchymosis) indicates retroperitoneal
hemorrhage
[CORRECT: A, C, E]
Rationale:
• A is correct because lipase >3× the upper limit of normal is diagnostic for acute
pancreatitis.
, • C is correct because hypocalcemia (<8.5 mg/dL) in acute pancreatitis is a Ranson's
criterion associated with severe disease and poor prognosis.
• E is correct because Cullen's sign is a classic indicator of retroperitoneal hemorrhage in
severe pancreatitis.
B is an unsupported inference—pain radiation alone does not confirm necrosis. D is
incorrect because pancreatic inflammation disrupts insulin/glucagon secretion, directly
affecting glucose. The cognitive skill assessed is inference—distinguishing evidence-
supported conclusions from unsupported extrapolations.
Question 4 (Multiple-Choice)
During shift report, the nurse learns that a patient with chronic obstructive pulmonary disease
(COPD) has the following trends over the past 8 hours: respiratory rate increased from 18 to 28;
oxygen saturation decreased from 92% to 86% on 2L nasal cannula; the patient is now using
accessory muscles to breathe; and arterial blood gas shows pH 7.30, PaCO₂ 58 mmHg, PaO₂ 62
mmHg, HCO₃⁻ 32 mEq/L. Which inference is most accurate?
A. The patient is experiencing a compensated respiratory acidosis
B. The patient is experiencing an uncompensated respiratory acidosis with acute-on-chronic
deterioration
C. The patient requires immediate intubation and mechanical ventilation
D. The patient's condition is stable and consistent with baseline COPD
[CORRECT: B]
Rationale: The ABG reveals an acidotic pH (7.30) with elevated PaCO₂ (58 mmHg) and elevated
bicarbonate (32 mEq/L). The elevated HCO₃⁻ indicates chronic compensation, but the acidemic
pH indicates that compensation is now inadequate for the current PaCO₂ level—characteristic of
acute-on-chronic respiratory acidosis. The clinical trends (increasing RR, decreasing SpO₂,
accessory muscle use) support acute deterioration. While intubation may become necessary,
the data do not yet support it as the immediate inference. The cognitive skill assessed is
inference—interpreting ABG trends and clinical data to identify acute decompensation
superimposed on chronic disease.
Sub-Topic 1B: Interpreting Laboratory Values, Assessment Findings, and Vital Sign Trends
(Questions 5–7)
, Question 5 (Multiple-Choice)
A nurse is caring for a patient who received a kidney transplant 48 hours ago. The patient's
laboratory values are as follows:
Table
Laboratory Value Result Normal Range
Serum creatinine 2.1 mg/dL 0.6–1.2 mg/dL
BUN 38 mg/dL 7–20 mg/dL
Potassium 5.8 mEq/L 3.5–5.0 mEq/L
Urine output (past 8 hours) 180 mL Expected: >0.5 mL/kg/hr
Which interpretation of these data is most accurate?
A. The elevated creatinine and BUN indicate normal postoperative healing of the transplanted
kidney
B. The laboratory values suggest acute rejection of the transplanted kidney
C. The data are consistent with delayed graft function requiring further evaluation
D. The low urine output is expected during the immediate postoperative period
[CORRECT: C]
Rationale: Delayed graft function (DGF) is characterized by the need for dialysis within the first
week post-transplant, rising creatinine, and oliguria. The creatinine of 2.1 mg/dL (elevated),
BUN of 38 mg/dL (elevated), potassium of 5.8 mEq/L (hyperkalemia), and urine output of 180
mL over 8 hours (oliguria) collectively indicate poor initial graft function requiring further
evaluation. While acute rejection is possible, it typically occurs later (days to weeks) and
requires biopsy confirmation. The cognitive skill assessed is interpretation—understanding the
significance of post-transplant laboratory trends and distinguishing expected findings from
complications.
Question 6 (Multiple-Choice)
COMPLETE EXAM QUESTIONS AND ACCURATE
ANSWERS |ALREADY PASSED!!
DOMAIN 1: INFERENCE & INTERPRETATION (10 Questions)
Question 1 (Multiple-Choice)
A nurse is reviewing the morning assessment data for four patients on a medical-surgical unit.
Which inference is most supported by the available evidence?
Patient A: Post-op day 2 after appendectomy; pain 3/10; temp 99.2°F; WBC 9,500/mm³; incision
clean, dry, intact
Patient B: Admitted yesterday with pneumonia; temp 102.4°F; RR 24; SpO₂ 92% on 2L NC;
productive cough with rust-colored sputum
Patient C: New admission with heart failure; BP 168/94; HR 88; 2+ pitting edema bilateral lower
extremities; reports sleeping on 3 pillows
Patient D: Diabetic patient; fasting glucose 142 mg/dL; HbA1c 7.2%; states "I feel fine today"
A. Patient A is developing a postoperative infection based on the elevated WBC count
B. Patient B is responding appropriately to antibiotic therapy as evidenced by the productive
cough
C. Patient C is experiencing decompensated heart failure with fluid volume overload
D. Patient D requires immediate insulin administration due to hyperglycemic crisis
[CORRECT: C]
Rationale: Patient C presents multiple converging data points supporting the inference of
decompensated heart failure: elevated blood pressure (168/94), bilateral pitting edema (2+),
and orthopnea (sleeping on 3 pillows). These findings collectively indicate fluid volume overload
and cardiac decompensation. The cognitive skill assessed is inference—drawing a logical
conclusion that extends beyond any single data point by synthesizing multiple clinical cues into
a coherent clinical picture.
Question 2 (Multiple-Choice)
,A nurse enters a patient's room and observes the following: the patient is diaphoretic, skin is
cool and clammy, the cardiac monitor shows sinus tachycardia at 118 bpm, and the patient
states, "I feel like I'm going to pass out." The patient's morning vital signs were BP 132/78, HR
76, RR 16, SpO₂ 97% on room air. Which inference is most justified?
A. The patient is experiencing an acute anxiety attack
B. The patient is having a myocardial infarction
C. The patient is developing hypovolemic shock
D. The patient is experiencing orthostatic hypotension
[CORRECT: C]
Rationale: The clinical presentation—diaphoresis, cool/clammy skin, tachycardia (118 bpm, up
from 76), and presyncope—forms a pattern consistent with the early compensatory phase of
hypovolemic shock. While myocardial infarction is possible, there is no chest pain or ECG
changes described. Anxiety alone does not explain the cool, clammy skin or significant
tachycardia. Orthostatic hypotension requires positional vital sign comparison not provided. The
cognitive skill assessed is inference—recognizing a pattern of physiological compensation and
drawing the most evidence-supported conclusion.
Question 3 (SATA)
A nurse reviews the following data for a patient admitted with acute pancreatitis. Which
inferences are supported by the clinical evidence? Select all that apply.
• A. The patient's lipase level of 1,850 U/L supports the diagnosis of acute pancreatitis
• B. The patient's severe epigastric pain radiating to the back indicates possible pancreatic
necrosis
• C. The patient's calcium level of 7.8 mg/dL suggests a poor prognosis
• D. The patient's blood glucose of 210 mg/dL is unrelated to the pancreatic inflammation
• E. The patient's Cullen's sign (periumbilical ecchymosis) indicates retroperitoneal
hemorrhage
[CORRECT: A, C, E]
Rationale:
• A is correct because lipase >3× the upper limit of normal is diagnostic for acute
pancreatitis.
, • C is correct because hypocalcemia (<8.5 mg/dL) in acute pancreatitis is a Ranson's
criterion associated with severe disease and poor prognosis.
• E is correct because Cullen's sign is a classic indicator of retroperitoneal hemorrhage in
severe pancreatitis.
B is an unsupported inference—pain radiation alone does not confirm necrosis. D is
incorrect because pancreatic inflammation disrupts insulin/glucagon secretion, directly
affecting glucose. The cognitive skill assessed is inference—distinguishing evidence-
supported conclusions from unsupported extrapolations.
Question 4 (Multiple-Choice)
During shift report, the nurse learns that a patient with chronic obstructive pulmonary disease
(COPD) has the following trends over the past 8 hours: respiratory rate increased from 18 to 28;
oxygen saturation decreased from 92% to 86% on 2L nasal cannula; the patient is now using
accessory muscles to breathe; and arterial blood gas shows pH 7.30, PaCO₂ 58 mmHg, PaO₂ 62
mmHg, HCO₃⁻ 32 mEq/L. Which inference is most accurate?
A. The patient is experiencing a compensated respiratory acidosis
B. The patient is experiencing an uncompensated respiratory acidosis with acute-on-chronic
deterioration
C. The patient requires immediate intubation and mechanical ventilation
D. The patient's condition is stable and consistent with baseline COPD
[CORRECT: B]
Rationale: The ABG reveals an acidotic pH (7.30) with elevated PaCO₂ (58 mmHg) and elevated
bicarbonate (32 mEq/L). The elevated HCO₃⁻ indicates chronic compensation, but the acidemic
pH indicates that compensation is now inadequate for the current PaCO₂ level—characteristic of
acute-on-chronic respiratory acidosis. The clinical trends (increasing RR, decreasing SpO₂,
accessory muscle use) support acute deterioration. While intubation may become necessary,
the data do not yet support it as the immediate inference. The cognitive skill assessed is
inference—interpreting ABG trends and clinical data to identify acute decompensation
superimposed on chronic disease.
Sub-Topic 1B: Interpreting Laboratory Values, Assessment Findings, and Vital Sign Trends
(Questions 5–7)
, Question 5 (Multiple-Choice)
A nurse is caring for a patient who received a kidney transplant 48 hours ago. The patient's
laboratory values are as follows:
Table
Laboratory Value Result Normal Range
Serum creatinine 2.1 mg/dL 0.6–1.2 mg/dL
BUN 38 mg/dL 7–20 mg/dL
Potassium 5.8 mEq/L 3.5–5.0 mEq/L
Urine output (past 8 hours) 180 mL Expected: >0.5 mL/kg/hr
Which interpretation of these data is most accurate?
A. The elevated creatinine and BUN indicate normal postoperative healing of the transplanted
kidney
B. The laboratory values suggest acute rejection of the transplanted kidney
C. The data are consistent with delayed graft function requiring further evaluation
D. The low urine output is expected during the immediate postoperative period
[CORRECT: C]
Rationale: Delayed graft function (DGF) is characterized by the need for dialysis within the first
week post-transplant, rising creatinine, and oliguria. The creatinine of 2.1 mg/dL (elevated),
BUN of 38 mg/dL (elevated), potassium of 5.8 mEq/L (hyperkalemia), and urine output of 180
mL over 8 hours (oliguria) collectively indicate poor initial graft function requiring further
evaluation. While acute rejection is possible, it typically occurs later (days to weeks) and
requires biopsy confirmation. The cognitive skill assessed is interpretation—understanding the
significance of post-transplant laboratory trends and distinguishing expected findings from
complications.
Question 6 (Multiple-Choice)
