阅读说明：本技术 可植入心室辅助系统及其操作方法 (Implantable ventricular assist system and method of operation thereof ) 是由 托马斯·亚历山大·施勒布施 于 2019-06-06 设计创作，主要内容包括：本发明涉及一种用于操作植入式心室辅助系统(2)的方法,其包括以下步骤：a)借助于所述辅助系统(2)确定第一时间点的第一阻抗参数,b)借助于所述辅助系统(2)确定第二时间点的第二阻抗参数,c)至少使用所述第一阻抗参数和所述第二阻抗参数确定阻抗参数的变化,或者将至少第一阻抗参数或第二阻抗参数与阈值进行比较。(The invention relates to a method for operating an implantable ventricular assist system (2), comprising the following steps: a) determining a first impedance parameter at a first point in time by means of the auxiliary system (2), b) determining a second impedance parameter at a second point in time by means of the auxiliary system (2), c) determining a change in the impedance parameter using at least the first impedance parameter and the second impedance parameter, or comparing at least the first impedance parameter or the second impedance parameter with a threshold value.)

1. A method for operating an implantable ventricular assist system (2), comprising the steps of:

a) determining a first impedance parameter at a first point in time by means of the auxiliary system (2),

b) determining a second impedance parameter at a second point in time by means of the auxiliary system (2),

c) determining a change in an impedance parameter at least when using the first impedance parameter and the second impedance parameter, or comparing at least the first impedance parameter or the second impedance parameter to a threshold.

2. The method of claim 1, wherein the impedance parameter is used to determine ventricular volume.

3. The method according to claim 1 or 2, wherein the impedance parameter is measured by at least two electrodes (4, 5) arranged on the auxiliary system (2).

4. The method of any of the preceding claims, wherein impedance measurements are made at different frequencies.

5. The method according to any of the preceding claims, wherein the conductivity of the fluid is determined by impedance measurements in a defined volume (6) of the auxiliary system (2).

6. The method according to any one of the preceding claims, wherein a fluid volume flow (7) through the auxiliary system (2) is determined.

7. The method according to any one of the preceding claims, wherein a total fluid volume flow (1) in a region of the auxiliary system (2) is determined.

8. A processing unit (8) configured to perform the method according to any of the preceding claims.

9. An implantable ventricular assist system (2), comprising:

-a measurement device (9) configured to determine a first impedance parameter at a first point in time and a second impedance parameter at a second point in time,

-a processing unit (8) configured to determine a change in an impedance parameter using at least the first and second impedance parameters or to compare at least the first or second impedance parameter with a threshold value.

10. Auxiliary system according to claim 9, wherein the measuring device (9) comprises at least two electrodes (4, 5) by means of which the impedance can be measured.

11. Auxiliary system according to claim 9 or 10, wherein the measuring device (9) is designed for impedance measurements at different frequencies.

12. Auxiliary system according to any one of the preceding claims, further comprising a sleeve (13) for supplying a fluid and a flow generator (14, 16) for generating a fluid flow.

13. Auxiliary system according to any one of the preceding claims, further comprising means for determining a fluid volume flow (7).