Assessment of Regional Lung Ventilation Distribution During Supraglottic and Subglottic Jet Ventilation by EIT.

"The use of electrical impedance tomography (EIT) (SentecTom BB2, Landquart, Switzerland) allows the investigators to obtain a visual and quantitative representation of the areas of ventilation and aeration of the lung. The fundamental principle of lung EIT relies on the application of small alternating electrical currents into the thorax and voltage measurements using electrodes on the skin surface generating cross-sectional images representing impedance change in a slice of the thorax. It is a radiation-free imaging method which has the advantage to reveal real-time information.~An array of electrodes (textile belt with 32 integrated electrocardiographic electrodes) has to be placed around the thorax to inject currents and to measure the resulting voltages on the thoracic surface."