How many rules are there for alphabetic filing?

The function of a double-lumen endotracheal tube is to:

a. facilitate speaking. b. protect one lung from the other. c. maintain a tracheostomy stoma. d. assist in weaning a patient from a TT.

How is diaphragmatic paralysis most often diagnosed?

a. Chest radiography b. Pulmonary function testing c. Arterial blood gases d. Physical examination