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Surgery
A 60-year-old man is being weaned from a ventilator in the ICU. The likelihood that weaning is going to fail is suggested by the presence of which of the following?
A respiratory rate of 24 breaths/min
A PaO2 of 80 mm Hg on FiO2 of 40%
A vital capacity (VC) of 5 mL/kg body weight
A minute ventilation of 8 L/min
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