阅读说明：本技术 用于确定流过植入式血管支持系统的流体的流速的方法以及可植入血管支持系统 (Method for determining a flow rate of a fluid flowing through an implantable vascular support system and implantable vascular support system ) 是由 托马斯·亚历山大·施勒布施 托比亚斯·施密德 于 2019-06-06 设计创作，主要内容包括：本发明涉及一种用于确定流过植入式血管支持系统(1)的流体的流速的方法,所述方法包括以下步骤：a)借助于所述支持系统(1)的超声传感器(2)以第一脉冲重复率进行第一脉冲多普勒测量,b)借助于所述支持系统(1)的超声传感器(2)以第二脉冲重复率进行第二脉冲多普勒测量,其中所述第二脉冲重复率不同于所述第一脉冲重复率,c)使用来自所述第一脉冲多普勒测量和所述第二脉冲多普勒测量的测量结果确定流速。(The invention relates to a method for determining a flow rate of a fluid flowing through an implantable vascular support system (1), the method comprising the steps of: a) performing a first pulse doppler measurement at a first pulse repetition rate by means of an ultrasound sensor (2) of the support system (1), b) performing a second pulse doppler measurement at a second pulse repetition rate by means of an ultrasound sensor (2) of the support system (1), wherein the second pulse repetition rate is different from the first pulse repetition rate, c) determining a flow rate using measurements from the first pulse doppler measurement and the second pulse doppler measurement.)

1. Method for determining a flow rate of a fluid flowing through an implantable vascular assistance system (1), the method comprising the steps of:

a) performing a first pulse Doppler measurement at a first pulse repetition rate by means of an ultrasonic sensor (2) of the assistance system (1),

b) performing a second pulse Doppler measurement with the aid of an ultrasonic sensor (2) of the assistance system (1) at a second pulse repetition rate, wherein the second pulse repetition rate is different from the first pulse repetition rate,

c) determining a flow velocity using the measurements of the first and second pulsed Doppler measurements.

2. A method according to claim 1, wherein in at least one of the two steps a) and b) a new ultrasound pulse is transmitted only after receiving an echo of the ultrasound pulse just previously transmitted.

3. The method of claim 1 or 2, wherein the maximum pulse repetition rate of the pulse doppler measurement may be less than twice the maximum doppler shift that occurs.

4. The method according to any of the preceding claims, wherein in step c) a correlation between the main frequency component (14) of the detected doppler spectrum (4) of the pulse doppler measurement and the pulse repetition rate applied by this doppler measurement is used.

5. The method according to any of the preceding claims, wherein in step c) a system of linear equations is solved, wherein a doppler shift is displayed from the main frequency components (14) of the first and second pulse doppler measurements.

6. The method of claim 5, wherein a linear Diophantine equation is established based on the system of linear equations.

7. The method of claim 6, wherein the linear Diophantine equation is solved using Bezout coefficients or an exhaustive method.

8. The method according to any one of the preceding claims, wherein the flow rate is used to determine a fluid volume flow (5) through the auxiliary system (1).

9. Implantable vascular assistance system (1), comprising:

an ultrasonic sensor (2) designed to make pulse Doppler measurements at different pulse repetition rates,

-a processing unit (3) designed to determine the flow velocity of the fluid flowing through the auxiliary system (1) using measurements of pulsed doppler measurements at different pulse repetition rates.

10. Auxiliary system according to claim 9, designed to perform a method according to any one of claims 1 to 8.

11. Use of pulsed doppler measurements at different pulse repetition rates for correcting ambiguous measurements of an ultrasound sensor (2) of an implanted vascular assistance system (1).