An RN is observing a nursing student who is open suctioning a hospitalized patient with a tracheostomy in place. Which action by the student requires the RN to intervene?

The student preoxygenates the patient for 1 minute before suctioning.

The student puts on clean gloves and uses a sterile catheter to open suction.

The student inserts the catheter about 5 inches into the tracheostomy tube.

The student applies suction for 10 seconds while withdrawing the catheter.