Objective To explore the curative effect of using BiPAP ventilator on chronic obstructive pulmonary disease(COPD)and Type II respiratory failure.Methods 78 cases of COPD complicated and Type II respiratory failure were randomly divided into the observation group and the control group,with 39 cases in each group.The control group was treated with conventional therapy and nursing,while the observation group was given the nasal-mask noninvasive mechanical ventilation and nursing intervention in addition to con...