If using a stylet, what is the critical requirement for its tip in relation to the endotracheal tube?

The critical requirement for the tip of the stylet in relation to the endotracheal tube is that it must not extend beyond the endotracheal tube's side and end holes. This is essential to ensure safe intubation while minimizing the risk of trauma to the airway. If the stylet tip were to extend beyond the ends of the tube, it could potentially cause injury to the trachea or other structures during insertion. By keeping the stylet tip contained within the boundaries of the endotracheal tube, the provider can maintain control over the device and reduce the likelihood of complications, ensuring a smoother and safer intubation process.