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 patients oxygen saturation is 93%.
c. The patient respiratory rate is 32 breaths/min.
d. The patients spontaneous tidal volume is 500 mL.
