Which of the following laboratory data are essential in assessing a patient's need for airway clearance therapy?

1. Chest radiograph
2. Pulmonary function tests
3. Hematology results
4. ABGs/oxygen saturation
a. 1 and 3 only
b. 1, 2, and 4 only
c. 3 and 4 only
d. 1, 2, 3, and 4

ANS: B
Box 43-3 lists the key factors you must consider when assessing a patient's need for airway clearance therapy.