Abstract: The present invention is directed to an endotracheal apparatus for providing reliable airway management in a patient. A flexible tube extends from the patient's oral or nasal cavity to a distal end within the trachea. A first ultrasound transducer means connected to the tube near its distal end is in intimate contact with the forward inner wall of the patient's trachea at substantially its midpoint. A second ultrasound transducer means is disposed in intimate contact with the forward outer skin surface of the patient's neck. Either the first or the second transducer means can be a transmitter of an ultrasound signal provided by ultrasound transducer excitation means, to which it is electrically connected. The other transducer means serves as a receiver, which is connected to ultrasound detector means situated externally to the patient.