Patent ID: 7774054
Filing Date: 2010-08-10
Classification: A61B

Abstract:
1. Method for controlling insertion of a tracheal tube in a patient comprising the steps of: positioning at least two electrodes on the patient's chest, said electrodes being coupled to a measuring instrument for measuring the impedance between the electrodes, measuring an impedance variation while ventilating the patient's lungs without the tube inserted in the patient, and generating and storing a first data set representing the impedance variation without intubation Zm, inserting the tube into the trachea of the patient, measuring an impedance variation while ventilating the patient's lungs with the tube inserted therein and generating a second data set representing the impedance variation with intubation Zt, and evaluating the first (Zm) and second (Zt) data sets representing the change in impedance variation with and without the tube inserted, and based on this evaluation generating a signal being indicative of the difference between the sets.