Device for determining the regional distribution of a parameter for lung perfusion
First Claim
1. A device for determining a regional distribution of a parameter for lung perfusion in a section plane of the thorax, the device comprising:
- an electrical impedance tomography unit comprising a plurality of electrodes, which can be placed on the thorax distributed around a circumference of the section plane, and a control and analysis unit, which is connected with the plurality of electrodes and is configured to consecutively feed alternating current or alternating voltage to each pair of electrodes to record voltage or current signals of other of the plurality of electrodes as measured signals and to reconstruct an impedance distribution in the section plane from the measured signals;
an administering device for intravenous administration of a conductivity contrast medium, wherein;
the control and analysis unit is further configured to display changes in the impedance distribution occurring as a consequence of the intravenous administration of conductivity contrast medium as a parameter for lung perfusion in the section plane as a function of time;
the administering device has a controllable dispensing device and the control and analysis unit and the controllable dispensing device are connected with one another via a data link and are configured to make available at least a start time and an end time and a quantity of an administered bolus of the conductivity contrast medium to the control and analysis unit, the control and analysis unit being configured to actuate the controllable dispensing device to administer a bolus of the conductivity contrast medium at a preset start time, in a preset quantity and with a preset time course via the data link, the controllable dispensing device being configured to send data concerning the start time, quantity and time course of the intravenous administration of a bolus to the control and analysis unit via the data link if the controllable dispensing device is triggered to administer a bolus directly or by an external device, the control and analysis unit being further configured to repeat the intravenous administration of the bolus of the conductivity contrast medium at preset time intervals and to display the changes of the parameter of the lung perfusion over time as a function of the time as a trend graph.
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Accused Products
Abstract
A device for determining the regional distribution of a parameter for lung perfusion includes an electrical impedance tomography unit with electrodes (E1, . . . EN), which can be placed on the thorax, that are connected to a control and analysis unit (2) and an administering device (4) for the intravenous administration of a conductivity contrast medium. The control and analysis unit (2) is configured to display changes in impedance distribution occurring as a consequence of the administration of conductivity contrast medium as a parameter for lung perfusion in the section plane as a function of time. The administering device (4) has a controllable dispensing device. The control and analysis unit and the dispensing device are connected with one another via a data link (3). A start time and an end time and a quantity of an administered bolus of the conductivity contrast medium are available to the control and analysis unit (2).
10 Citations
18 Claims
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1. A device for determining a regional distribution of a parameter for lung perfusion in a section plane of the thorax, the device comprising:
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an electrical impedance tomography unit comprising a plurality of electrodes, which can be placed on the thorax distributed around a circumference of the section plane, and a control and analysis unit, which is connected with the plurality of electrodes and is configured to consecutively feed alternating current or alternating voltage to each pair of electrodes to record voltage or current signals of other of the plurality of electrodes as measured signals and to reconstruct an impedance distribution in the section plane from the measured signals; an administering device for intravenous administration of a conductivity contrast medium, wherein; the control and analysis unit is further configured to display changes in the impedance distribution occurring as a consequence of the intravenous administration of conductivity contrast medium as a parameter for lung perfusion in the section plane as a function of time; the administering device has a controllable dispensing device and the control and analysis unit and the controllable dispensing device are connected with one another via a data link and are configured to make available at least a start time and an end time and a quantity of an administered bolus of the conductivity contrast medium to the control and analysis unit, the control and analysis unit being configured to actuate the controllable dispensing device to administer a bolus of the conductivity contrast medium at a preset start time, in a preset quantity and with a preset time course via the data link, the controllable dispensing device being configured to send data concerning the start time, quantity and time course of the intravenous administration of a bolus to the control and analysis unit via the data link if the controllable dispensing device is triggered to administer a bolus directly or by an external device, the control and analysis unit being further configured to repeat the intravenous administration of the bolus of the conductivity contrast medium at preset time intervals and to display the changes of the parameter of the lung perfusion over time as a function of the time as a trend graph. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A device for determining a regional distribution of a parameter for lung perfusion in a section plane of a thorax of a patient, the device comprising:
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an electrical impedance tomography unit comprising a plurality of electrodes, which can be placed on the thorax, and distributed around a circumference of the section plane; an administering device for selective intravenous administration of a plurality of boli of conductivity contrast medium to the patient at selectable and defined start times, defined end times and defined quantities; a control and analysis unit connected to said plurality of electrodes, said control and analysis unit being configured to consecutively feed alternating current or alternating voltage to each pair of said electrodes to record voltage or current signals of other of the plurality of electrodes as measured signals and to reconstruct an impedance distribution in the section plane from the measured signals for each time window in which each of the boluses act, said control and analysis unit being further configured to display changes in the impedance distribution occurring as a consequence of intravenous administration of conductivity contrast medium as a parameter for lung perfusion in the section plane as a function of time; a data link connecting said administering device and said control and analysis unit, said administering device and said control and analysis unit being configured to transmit the defined start time, end time, and quantity of each of the administered boli of the conductivity contrast medium to said control and analysis unit, said control and analysis unit being configured to have each impedance distribution correspond to the defined start time, end time and quantity. - View Dependent Claims (16, 17, 18)
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Specification