The nurse has administered aminophylline to a client with emphysema. The medication is effective when there is: 1. Relief from spasms of the diaphragm. 2. Relaxation of smooth muscles in the...

The nurse has administered aminophylline to a client with emphysema. The medication is effective when there is:

1. Relief from spasms of the diaphragm.

2. Relaxation of smooth muscles in the bronchioles.

3. Efficient pulmonary circulation.

4. Stimulation of the medullary respiratory center.