An 87-kg male patient intubated on PC-CMV has low alarms; ETT at 21 cm at the gum line, cuff pressure added resulting in seal requires 44 cm H2O. The respiratory therapist should do which?

• A. Move ETT deeper
• B. Change to a larger size endotracheal tube
• C. Increase inspiratory time
• D. Reinflate cuff

Answer: (B)

The key idea is that a proper airway seal should be achievable with a cuff pressure that's safe for the tracheal mucosa. If you have to push the cuff to a very high pressure (44 cm H2O) to stop the leak, that signals the tube is too small for the patient’s trachea and is causing a persistent cuff leak. High cuff pressures (well above 30 cm H2O) risk mucosal ischemia and tracheal injury, so simply reinflating or leaving things as is isn’t a good plan.

The best action is to switch to a larger endotracheal tube. A bigger tube can seal the trachea at a much lower cuff pressure, restoring effective ventilation and reducing the risk of airway injury from overinflation.

Moving the tube deeper could cause misplacement or mainstem intubation and doesn’t address the leak around the cuff. Increasing inspiratory time won’t fix a leak around the cuff. Reinflating the cuff at such a high pressure worsens the injury risk without solving the underlying issue.