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CRITICAL CARE HESI CONCEPTS
2026|WELL REVISED EXAM QUESTIONS
WITH CORRECT ANSWERS
Elevated levels of PaCO2 may indicate - correct-answer - Pneumonia
Asthma
COPD
Anesthesia effects
Opioids ( respiratory acidosis)
Decreased levels of PaCO2 may indicate - correct-answer - hyperventilation
(respiratory alkalosis)
HCO3 normal levels - correct-answer - 21-28 mEq/ L
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Elevated HCO3 levels may indicate - correct-answer - Respiratory acidosis as
compensation for primary metabolic alkalosis
Decreased levels of HCO3 indicate - correct-answer - respiratory alkalosis as
compensation for primary metabolic acidosis
SpO2 normals - correct-answer - 95-100%
(may be lower in older adults)
SpO2 decreased levels may indicate - correct-answer - impaired ability of
hemoglobin to release oxygen to tissues
Compensation for normal pH, Abnormal CO2, Abnormal HCCO3 - correct-answer -
Full compensated
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Compensation for abnormal pH , abnormal CO2, abnormal HCO3 - correct-answer
- Partially compensated
Compensation for abnormal pH and one or the other CO2 and HCO3 abnormal -
correct-answer - Uncompensated
Clinical manifestations of Respiratory acidosis - correct-answer - headache
decreased LOC
Hypoventilation (cause of problem)
Cardiac dysrhthmias
IF SEVERE: HYPOTENSION
CRITICAL CARE HESI CONCEPTS
2026|WELL REVISED EXAM QUESTIONS
WITH CORRECT ANSWERS
Elevated levels of PaCO2 may indicate - correct-answer - Pneumonia
Asthma
COPD
Anesthesia effects
Opioids ( respiratory acidosis)
Decreased levels of PaCO2 may indicate - correct-answer - hyperventilation
(respiratory alkalosis)
HCO3 normal levels - correct-answer - 21-28 mEq/ L
,2|Page
Elevated HCO3 levels may indicate - correct-answer - Respiratory acidosis as
compensation for primary metabolic alkalosis
Decreased levels of HCO3 indicate - correct-answer - respiratory alkalosis as
compensation for primary metabolic acidosis
SpO2 normals - correct-answer - 95-100%
(may be lower in older adults)
SpO2 decreased levels may indicate - correct-answer - impaired ability of
hemoglobin to release oxygen to tissues
Compensation for normal pH, Abnormal CO2, Abnormal HCCO3 - correct-answer -
Full compensated
, 3|Page
Compensation for abnormal pH , abnormal CO2, abnormal HCO3 - correct-answer
- Partially compensated
Compensation for abnormal pH and one or the other CO2 and HCO3 abnormal -
correct-answer - Uncompensated
Clinical manifestations of Respiratory acidosis - correct-answer - headache
decreased LOC
Hypoventilation (cause of problem)
Cardiac dysrhthmias
IF SEVERE: HYPOTENSION