| abstract |
The invention relates to a device for determining the regional distribution of a measurement for lung perfusion, comprising an electronic impedance tomography unit that has electrodes (E1, ...EN) which can be attached to the thorax, distributed around the periphery of a sectional plane, and a control-and-evaluation unit (2) that is connected to said electrodes and is configured to gradually feed each pair of electrodes alternating current or alternating voltage, to record voltage or current signals of the remaining electrodes as measurement signals, and to reconstruct the impedance distribution in the sectional plane from these measurement signals, as well as a feed device (4) for intravenously introducing a conductivity contrast agent. The control-and-evaluation unit (2) is also configured to bring to the display the changes in the impedance distribution caused by the introduction of a conductivity contrast agent, as a measurement for lung perfusion in the sectional plane as a function of time. According to the invention, the feed device (4) comprises a controllable metering device, and the control-and-evaluation unit and the metering device are interconnected by means of a data connection (3) and are configured such that at least the starting and ending time, and the amount of the release of a bolus of the conductivity contrast agent, are available to said control-and-evaluation unit (2). |