In Electrical Impedance Tomography (EIT), weak alternating currents are applied to the body where they take the path of least resistance, generating an electrical voltage at the body surface. Thirty-two high-resolution electrodes in a textile belt measure these biological signals. An integrated position sensor identifies the patient's position. The arrangement of the electrodes allows them to successively receive the signals from all directions. This also changes the electrical angle from which the local tissue resistances are viewed and then converted into moving images. With this approach, continuous imaging of the lung function has become possible. By linking this technique with the measuring and control technology of a state-of-the-art intensive care ventilator (ventilator integrated tomography), a wide range of clinical problems can be assessed and the appropriate therapeutic decisions made.
- Intensive care units