CN102458499A - 用于在体外回路中输送血液的装置 - Google Patents

用于在体外回路中输送血液的装置 Download PDF

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CN102458499A
CN102458499A CN2010800284910A CN201080028491A CN102458499A CN 102458499 A CN102458499 A CN 102458499A CN 2010800284910 A CN2010800284910 A CN 2010800284910A CN 201080028491 A CN201080028491 A CN 201080028491A CN 102458499 A CN102458499 A CN 102458499A
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O·彭卡
J·施雷耶
E·科诺特
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Livanova Deutschland GmbH
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Abstract

一种用于在体外回路中输送血液的装置，其具有离心泵1，该离心泵吸取待输送的血液流过与该泵的吸取侧连接的静脉软管线2，并释放该待输送的血液流过与该泵的释放侧连接的动脉软管线3，该装置包括流量传感器5和压力传感器6以及分析设备4，所述流量传感器检测在该泵的释放侧的释放量，并输出相应于该释放量的测量信号，所述压力传感器检测在该泵的释放侧的压力，并输出相应于该压力的测量信号，上述传感器的测量信号被输送给所述分析设备，所述分析设备在在利用上述两个测量信号和离心泵的转速的情况下求得相应于在该泵的吸取侧的压力的数值。

Description

用于在体外回路中输送血液的装置
本发明涉及一种用于在体外回路中输送血液的装置，该装置具有离心泵。
利用离心泵在体外血液回路中输送血液是公知的，例如由DE 39 35 502A1已知。在这些装置中，静脉软管线将患者的血液输送给泵，并且动脉软管线将其导引离开该泵。因为在这些装置中，离心泵直接连接静脉输入管线，所以在泵的吸取功率过大时会导致在静脉软管线中出现过高的低压，这种低压会损害血液。为了避免这种情况，可以在泵的吸取侧借助传感器来检测低压，以便在达到设定值时针对过高的低压采取合适的应对措施，例如警告操作人员或者自动干预泵的运行。
但是在泵的静脉侧检测低压是有问题的，因为当在压力传感器的位置出现不密封时，由于此处出现的(相对于大气压的)低压而可能导致空气渗入到血液回路中。对渗入空气的识别由于该问题而在实践中不可实施；同时，进入体外血液回路中的空气是对患者的极大威胁。
在这种背景下，本发明的问题在于，提供一种可以获得相应于在泵的吸取侧的低压度数的可靠数值的途径，而无需为此在泵的静脉侧使用压力传感器。
该问题通过一种用于在体外回路中输送血液的装置得以解决，该装置具有离心泵，该离心泵吸取待输送的血液流过与该泵的吸取侧连接的静脉软管线，并释放该待输送的血液流过与该泵的释放侧连接的动脉软管线，该装置具有流量传感器和压力传感器和分析设备，所述流量传感器被设置用于检测在该泵的释放侧的释放量，并输出相应于该释放量的测量信号，所述压力传感器被设置用于检测在该泵的释放侧的压力，并输出相应于该压力的测量信号，流量传感器的测量信号和压力传感器的测量信号被输送给所述分析设备，所述分析设备在利用上述两个测量信号和离心泵的转速的情况下求得相应于在该泵的吸取侧的压力的数值。
在一种有利的设计方案中，分析设备在求取相应于在该泵的吸取侧的压力的数值时使用所述离心泵的特征曲线簇。
在另一有利的设计方案中，在分析设备中所述离心泵的特征曲线簇被存储在存储器中。
在另一有利的设计方案中，分析设备连接显示设备，该显示设备用于至少显示在泵的吸取侧的低压和/或用于警告操作人员。
在另一有利的设计方案中，转速传感器的测量信号被输送给分析设备。
在另一有利的设计方案中，泵的控制信号被输送给分析设备，所述控制信号确定或表示泵的转速。
在另一有利的设计方案中，分析设备承担用于离心泵的控制设备的功能，或者集成在用于离心泵的控制设备中，从而确定离心泵的转速的控制信号可以输送给离心泵。
在另一有利的设计方案中，分析设备在出现泵的吸取侧的压力的设定值时减小泵的转速。
下面参考附图详细描述本发明的实施例。
图1示出根据本发明的装置的实施例的构造。
图1中示出的根据本发明的用于在体外回路中输送血液的装置的实施例包括一个离心泵1，该离心泵吸取待输送的血液流过与该泵的吸取侧连接的静脉软管线2。静脉软管线2可以直接连接患者，该患者的血液在体外血液回路中输送。但是可以附加地在静脉管线上接入回路的其它组件，但这些组件在图1中没有示出。离心泵1通过与泵的释放侧连接的动脉软管线3把血液释放到体外血液回路的动脉段上。
在泵的动脉侧设置有流量传感器5和压力传感器6。流量传感器5用于检测在泵1的释放侧的释放量，并输出相应于该释放量的测量信号。压力传感器6用于检测在泵1的释放侧的压力，并输出相应于流量的测量信号。关于压力传感器6需要注意，测量位置并非关键，因为假如在测量位置的区域内出现不密封，则在泵的动脉侧会形成(相对于大气压的)过压，因此不会导致空气渗入动脉软管线3中，而是可能导致血液从动脉软管线3中流出。
图1还示出，此处描述的根据本发明的装置的实施例还包括分析设备4，流量传感器5的测量信号和压力传感器6的测量信号被输送给该分析设备。此外向该分析设备输送另一信号，例如转速传感器1a的测量值或泵的相应于离心泵1的转速的控制信号。如图1所示，在此处描述的实施例中，通过信号线路4a至4c向分析设备4输送所述测量信号和该另一信号。如果分析设备4集成在用于控制泵的控制设备中，则不需要单独地输送关于转速的信号。在图1中，该设计方案的特点是，设置有(虚线示出的)控制信号线路4d，通过该控制信号线路，在这种情况下被设计为控制设备的分析设备4把控制信号输送给泵1，并以这种方式直接确定泵的转速。
但是在任何情况下，分析设备4都分析测量信号和离心泵的转速，并在所述测量信号和转速的基础上求出相应于在泵的吸取侧的压力的值。此处利用的是，离心泵上的压力升高(出口压力相对于入口压力的梯度)是所述转速和流量的函数，例如可以借助于特征曲线簇来描述该函数。在泵的静脉侧或动脉侧的变化的阻力对此没有影响。由此可以在已知释放侧的压力以及已知流量和已知转速的情况下求出吸取侧的压力，其方式为，首先借助于特征曲线簇(且必要时在特征曲线簇的支撑值之间进行内插)确定泵上的压力升高，随后从在泵的释放侧的压力中减去这样确定的压力升高。
对于一定类型的离心泵来说，必须事先以测量技术求得特征曲线簇。特征曲线簇的值在分析设备4内优选存储在存储器7中，从而分析设备可以在求取相应于在泵的吸取侧的压力的数值时调取离心泵的特征曲线簇，其中动脉侧的传感器的测量信号和转速可以用作调取参数。假如特征曲线簇内给定的参数组合中不存在支撑值，则借助于(线性)内插法来确定特征曲线簇内的合适的点。
当分析设备4确定出在离心泵的静脉侧的过度低压时，可以通过显示设备8向操作人员输出警告提示，于是操作人员采取合适的应对措施，以便减小静脉管线中的低压。为此，分析设备4通过信号线路4e连接显示设备8。借助显示设备8还可以实现分析设备4持续提供至少用于在泵的静脉侧的低压的压力显示，从而操作人员在持续运行中获得关于当前压力状况的概况。
如果如上所述，分析设备4也承担控制设备的功能，或者集成在控制设备中，则可以在离心泵的静脉侧的过度低压情况下直接干预泵的运行并降低转速，以便减小静脉管线中的低压。为了将相应的控制信号输送给泵1，可以使用已提到的控制信号线路4d。

Claims (8)

1.用于在体外回路中输送血液的装置，具有：
-离心泵，该离心泵吸取待输送的血液流过与该泵的吸取侧连接的静脉软管线(2)，并释放该待输送的血液流过与该泵的释放侧连接的动脉软管线(3)，
-流量传感器(5)，该流量传感器被设置用于检测在该泵(1)的释放侧的释放量，并输出相应于该释放量的测量信号，
-压力传感器(6)，该压力传感器被设置用于检测在该泵(1)的释放侧的压力，并输出相应于该压力的测量信号，
-分析设备(4)，所述流量传感器(5)的测量信号和所述压力传感器(6)的测量信号被输送给该分析设备，并且该分析设备在利用所述的两个测量信号和离心泵的转速的情况下求得相应于在该泵的吸取侧的压力的数值。
2.根据权利要求1所述的装置，其中所述分析设备(4)在求取相应于在该泵的吸取侧的压力的数值时调取所述离心泵的特征曲线簇。
3.根据权利要求2所述的装置，其中在所述分析设备(4)中所述离心泵的特征曲线簇被存储在存储器(7)中。
4.根据权利要求1-3之一所述的装置，其中所述分析设备(4)连接显示设备(8)，该显示设备用于至少显示在所述泵(1)的吸取侧的低压和/或用于警告操作人员。
5.根据权利要求1-3之一所述的装置，其中转速传感器(1a)的测量信号被输送给所述分析设备(4)。
6.根据权利要求1-3之一所述的装置，其中所述泵(1)的控制信号被输送给所述分析设备(4)，所述控制信号相应于所述泵的转速。
7.根据权利要求1-4之一所述的装置，其中所述分析设备(4)承担用于所述离心泵(1)的控制设备的功能，或者集成在用于所述离心泵(1)的控制设备中，从而确定所述离心泵(1)的转速的控制信号可以输送给所述离心泵。
8.根据权利要求7所述的装置，其中所述分析设备(4)在出现在所述泵的吸取侧的压力的设定值时减小所述泵(1)的转速。
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CN107683151A (zh) * 2015-06-24 2018-02-09 日机装株式会社 血液净化装置

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US20120150089A1 (en) 2012-06-14
JP5687696B2 (ja) 2015-03-18
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BRPI1011644A2 (pt) 2016-10-25
EP2445545A1 (de) 2012-05-02
CN102458499B (zh) 2015-06-17

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