The high pressure alarm is sounding frequently on the ventilator of a 58 year-old patient who is being mechanically ventilated following major orthopedic surgery. The set rate on the ventilator is 12/min and auscultation reveals bilateral vesicular breath sounds. Current vital signs include: heart rate 130/min, respiratory rate 36/min, blood pressure 125/88 mmHg, temperature 37.1°C (98.8°F), and SpO2 96%. The patient appears quite agitated. The patient's respiratory pattern is most likely the result of
A. post-operative pain.
B. a viral infection.
C. hypoxemia.
D. lactic acidosis.
Ans: A. post-operative pain.
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