Studies Have Compared the Effectiveness of Newer Airway Clearance Methods

Studies have compared the effectiveness of newer airway clearance methods with manual chest physiotherapy (CPT) and have found that the CPT and the newer devices are safe and effective modalities for clearing airway secretions.The use of mechanical devices,however,does which of the following? (Select all that apply.)

A) Reduce patient satisfaction
B) Reduce adherence
C) Allow for self-administration
D) Do not cause discomfort