The Physician Orders the Following Mechanical Ventilation Settings for a Patient

question 28

Multiple Choice

The physician orders the following mechanical ventilation settings for a patient who weighs 75 kg.The patient's spontaneous respiratory rate is 22 breaths/min.What arterial blood gas abnormality may occur if the patient continues to be tachypneic at these ventilator settings? Settings:

Tidal volume: 600 mL (8 mL per kg)
FiO₂: 0.5
Respiratory rate: 14 breaths/min
Mode assist/control
Positive end-expiratory pressure: 10 cm H₂O

• A) Metabolic acidosis
• B) Metabolic alkalosis
• C) Respiratory acidosis
• D) Respiratory alkalosis

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Definitions:

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