1. A nurse is caring for a patient whose arterial blood gas (ABG) results show: pH
7.30, PaCO2 52, and HCO3 24. Which acid-base imbalance is occurring?
A. Respiratory Acidosis
B. Metabolic Acidosis
C. Metabolic Alkalosis
D. Respiratory Alkalosis
Answer: A
Rationale: The pH is low (<7.35), the PaCO2 is high (>45), and the HCO3 is normal,
indicating respiratory acidosis.
2. When calculating the Mean Arterial Pressure (MAP) for a patient with a blood
pressure of 100/70, what is the result?
A. 70 mmHg
B. 85 mmHg
C. 80 mmHg
D. 90 mmHg
Answer: C
Rationale: MAP = (Systolic + 2 * Diastolic) / 3. So, (100 + 140) / 3 = 80 mmHg.
,3. What is the significance of a Central Venous Pressure (CVP) reading of 1
mmHg?
A. Fluid overload
B. Right-sided heart failure
C. Pulmonary hypertension
D. Hypovolemia
Answer: D
Rationale: A normal CVP is 2-8 mmHg. A value of 1 indicates low volume or hypovolemia.
4. The nurse identifies the phlebostatic axis as the reference point for leveling
the pressure transducer. Where is this located?
A. 4th intercostal space, midaxillary line
B. 2nd intercostal space, midclavicular line
C. 5th intercostal space, anterior axillary line
D. 4th intercostal space, sternal border
Answer: A
Rationale: The phlebostatic axis is located at the 4th intercostal space and the midway
point of the anterior-posterior chest diameter (midaxillary line).
5. A patient’s Pulmonary Artery Wedge Pressure (PAWP) is 22 mmHg. Which
clinical condition does this likely represent?
A. Dehydration
B. Right ventricular failure
C. Left-sided heart failure
D. Septic shock
Answer: C
Rationale: Normal PAWP is 6-12 mmHg. An elevated PAWP indicates increased pressure
in the left atrium, commonly seen in left-sided heart failure or fluid overload.
, 6. During the ‘A’ (Airway) portion of the Primary Survey in trauma, what is the
priority action if the airway is obstructed?
A. Establish a patent airway while maintaining cervical spine stabilization
B. Insert a nasogastric tube
C. Administer 100 percent oxygen via non-rebreather mask
D. Perform a needle thoracostomy
Answer: A
Rationale: Maintaining a patent airway while protecting the cervical spine is the first
priority in trauma assessment.
7. Which assessment is part of the ‘C’ (Circulation) phase of the Primary Survey?
A. Pupillary response
B. Breath sounds
C. Checking central pulses and skin color
D. Glasgow Coma Scale score
Answer: C
Rationale: Circulation focuses on pulse quality, skin color/temperature, and capillary refill.
8. A patient has a pH of 7.48, PaCO2 of 30, and HCO3 of 22. What is the
interpretation?
A. Respiratory Alkalosis
B. Respiratory Acidosis
C. Metabolic Alkalosis
D. Metabolic Acidosis
Answer: A
Rationale: The pH is high (>7.45) and the PaCO2 is low (<35), indicating respiratory
alkalosis.