Thirty minutes after a Sengstaken-Blakemore tube is inserted, the nurse observes that the client appears to be having difficulty breathing. The nurse's first action should be to: 1. Remove the tube....

Thirty minutes after a Sengstaken-Blakemore tube is inserted, the nurse observes that the client appears to be having difficulty breathing. The nurse's first action should be to:

1. Remove the tube.

2. Deflate the esophageal portion of the tube.

3. Determine whether the tube is obstructing the airway.

4. Increase the oxygen flow rate.