RRT Respiratory Therapy 2

Question 1

A patient's ABG reveals pH 7.28, PaCO2 58 mmHg, HCO3 26 mEq/L. What is the primary acid-base disorder?

Accepted Answer

Respiratory acidosis uncompensated

Answer

pH below 7.35 with elevated PaCO2 and near-normal HCO3 indicates uncompensated respiratory acidosis.

Question 2

Which lung volume cannot be measured by spirometry alone?

Accepted Answer

Functional residual capacity

Answer

FRC contains the residual volume, which cannot be measured by spirometry and requires body plethysmography or gas dilution.

Question 3

A patient on mechanical ventilation develops sudden hypotension and absent breath sounds on the left. The most likely diagnosis is:

Accepted Answer

Left tension pneumothorax

Answer

Absent breath sounds on one side plus sudden hypotension in a ventilated patient indicates tension pneumothorax requiring immediate needle decompression.

Question 4

The P/F ratio (PaO2/FiO2) threshold for classifying severe ARDS is:

Accepted Answer

< 100 mmHg

Answer

Per the Berlin Definition, severe ARDS is defined by a P/F ratio less than 100 mmHg on PEEP ≥ 5 cmH2O.

Question 5

Which inhaled medication is classified as a long-acting muscarinic antagonist (LAMA)?

Accepted Answer

Tiotropium

Answer

Tiotropium (Spiriva) is a once-daily LAMA used for COPD maintenance, providing bronchodilation lasting 24 hours.

RRT Exam Practice Test

RRT Exam Practice Test

RRT Respiratory Therapy 2