When the Nurse Is Weaning a Patient Who Has Chronic

When the nurse is weaning a patient who has chronic obstructive pulmonary disease ( COPD ) from mechanical ventilation, which patient assessment indicates that the weaning protocol should be discontinued?

A) The patient heart rate is 98 beats/min.
B) The patient's oxygen saturation is 93%.
C) The patient respiratory rate is 32 breaths/min.
D) The patient's spontaneous tidal volume is 500 mL.

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