CN101690692B - 一种自动计算并寻找最佳施加反搏压力时刻的方法 - Google Patents

一种自动计算并寻找最佳施加反搏压力时刻的方法 Download PDF

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CN101690692B
CN101690692B CN2009100191667A CN200910019166A CN101690692B CN 101690692 B CN101690692 B CN 101690692B CN 2009100191667 A CN2009100191667 A CN 2009100191667A CN 200910019166 A CN200910019166 A CN 200910019166A CN 101690692 B CN101690692 B CN 101690692B
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徐继文
耿金碧
张乐贡
郝帅
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Shandong Ataw Industrial Robot Technology Co ltd
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Abstract

一种自动计算并寻找最佳施加反搏压力时刻的方法,采用基于脉搏波传导速度的方法,精确、实时采集、计算加压部位的血液回流时刻,以此作为该点反搏的触发时刻;包括以下步骤:测得同一心跳周期内两点之间脉搏波传导的时间间隔和距离得出脉搏传播速度;选取被测者身体上两点之间的距离为一基准长度,在同一脉络上选取一点作为参考点,一点为测量点,两点之间的距离与基准长度的比值作为一体表长度相对指数,利用参考点的血液波动的时刻、该体表长度相对指数、血液从参考点流到测量点所用的时间得出测量点血液波动的时刻,即为该测量点的触发时刻,也即为该测量点最佳施加反搏压力时刻。该方法简单、精确、可靠,排除对用户的潜在危险。

Description

一种自动计算并寻找最佳施加反搏压力时刻的方法
技术领域
本发明涉及一种自动计算并寻找最佳施加反搏压力时刻的方法。
背景技术
现有的体外反搏器使用的是在心脏舒张期的某一时刻以与心脏跳动相同的频率按压人体的下肢和臀部等部位,以加速血液回流,通过这样一种方式来治疗人体的某些疾病,而按压的时机可以是在公认的心脏舒张期特定安全时间以后的一段范围内选择,在这段时间必然有一最佳施加压力时间,而这一时间是因人而异,因人体状况而异的。
现有的体外反搏器的触发信号由以下几种:
1)通过采集心电QRS波群的R波当作触发信号;
2)利用检测颞动脉信号作为反搏触发信号;
3)利用检测指、耳脉信号作为反搏触发信号。
上述三种主流的算法都有一个默认的前提条件,即不论是在心脏部位、指脉还是颞动脉处采集的血液波动,都可以视为是反搏部位(即小腿、大腿和臀部)的触发信号,这显然是不合适的。很显然,血液是脉动传播的,血液波的传播是有一定的速度的,从心脏传至四肢需要一定时间,上述三种方法简单地将采集部位的信号当作反搏部位的信号,这样就会造成心脏上的最佳施压时刻与下肢上的最佳施压时刻在时间上有很大的的误差。这种误差也会因人而异。一旦产生误差,就会在错误的时刻进行反搏操作,这样,不仅不能够达到理想的效果,更重要的可能对心脏造成额外的负担,这样的方法存在一定的盲目性,对患者有一定的潜在危险。可见,正确的检测方法是采用反搏方法能否成功或是否有效的关键所在。
发明内容
为了克服上述现有技术存在的缺点,本发明的目的在于提供一种自动计算并寻找最佳施加反搏压力时刻的方法,该方法简单、精确、可靠、方便易行,排除对用户的潜在危险,达到治疗用户某种疾病的目的。
为了解决上述问题,本发明采用以下技术方案:一种自动计算并寻找最佳施加反搏压力时刻的方法,采用基于脉搏波传导速度的方法,精确、实时采集、计算加压部位的血液回流时刻,以此作为该点反搏的触发时刻;包括以下步骤:
(1)首先在被测者动脉树同一条脉络上任意选取两点,测出该两点之间的距离D,然后测出同一心跳周期内两点之间脉搏波传导的时间间隔T,利用公式:PWV=D/T,得出PWV为被测者该条脉络上的脉搏传播速度,也即为该经脉的血液流动速度;
(2)设置一体表长度相对指数ICL,其步骤是:
a、选取被测者身体上任意两点之间的距离为一基准长度P,
b、在所述的该脉络上选取任意一点作为参考点,参考点与测量点同一脉络,测得参考点距测量点之间的距离为P1-P2
c、将所述的P、P1-P2利用公式: I CL = P 1 - P 2 P , 得出体表长度相对指数ICL;因为同一脉络上血液流动速度PWV一定,所以
Figure G2009100191667D00022
(3)采集所述参考点的血液波动的时刻T1
(4)根据已知的血液流动速度,算得血液流经基准长度P所用的时间段Ta
(5)将步骤(2)的ICL、步骤(3)的T1、步骤(4)的Ta代入公式:Tt=T1+ICLTa,得到Tt为所述测量点的血液波动的时刻,即为该测量点的触发时刻,也即为该测量点最佳施加反搏压力时刻。
作为本发明的进一步的技术方案:
该自动计算并寻找最佳施加反搏压力时刻的方法,在步骤(2)中,所述基准长度P可取被测者的踝骨部位到某一脚趾端部的距离。
在步骤(2)中,所述基准长度P也可取被测者的踝骨部位到膝盖处的距离。
更进一步的:
该自动计算并寻找最佳施加反搏压力时刻的方法,步骤(2)中所述参考点可为在远动脉端选取的一点。
本发明的有益效果是:由于是通过采集同一心跳周期内的两点脉搏时刻,来计算脉搏传导速度,来确定安全的最佳反搏时刻,与现有的技术相比,本方法突出了更精确、更简单、更安全、更可靠、更科学的特点,并且实时地跟踪采集信号,精确地控制反搏时刻,对于心率不齐的患者,使用起来也更安全可靠。该方法还可以监控病人的脉搏次数,以便当低于某一值或高于另一值时,使反搏系统自动停止反搏,更人性化。
具体实施方式
下面详细描述本发明的实施例:
实施例一:该自动计算并寻找最佳施加反搏压力时刻的方法,采用基于脉搏波传导速度的方法,精确、实时采集、计算加压部位的血液回流时刻,以此作为该点反搏的触发时刻;包括以下步骤:
(1)首先在被测者动脉树同一条脉络上任意选取两点,测出该两点之间的距离D,然后测出同一心跳周期内两点之间脉搏波传导的时间间隔T,利用公式:PWV=D/T,得出PWV为被测者该条脉络上的脉搏传播速度,也即为该经脉的血液流动速度;
(2)设置一体表长度相对指数ICL,其步骤是:
a、选取被测者身体上同一脉络上两点之间的距离为一基准长度P,该基准长度P可取被测者的踝骨部位到某一脚趾端部的距离;采用该距离作为基准长度,方便测量,有利于提高最终结果的精确度;
b、在所述的该脉络上选取任意一点作为参考点,参考点与测量点同一脉络,可为在远动脉端选取的一点,然后测得参考点距测量点之间的距离为P1-P2
c、将所述的P、P1-P2利用公式: I CL = P 1 - P 2 P , 得出体表长度相对指数ICL;因为同一脉络上血液流动速度PWV一定,所以
Figure G2009100191667D00042
(3)采集所述参考点的血液波动的时刻T1
(4)根据已知的血液流动速度,算得血液流经基准长度P所用的时间段Ta
(5)将步骤(2)的ICL、步骤(3)的T1、步骤(4)的Ta代入公式:Tt=T1+ICLTa,得到Tt为所述测量点的血液波动的时刻,即为该测量点的触发时刻,也即为该测量点最佳施加反搏压力时刻。
如此同理,可得出被测者身体任意一点的最佳施加反搏压力时刻。
实施例二:与实施例一不同之处在于,在步骤(2)中,所述基准长度P也可取被测者的踝骨部位到膝盖处的距离。其余技术同实施例一。
本发明并不仅仅局限于上述实施例。

Claims (4)

1.一种自动计算并寻找最佳施加反搏压力时刻的方法,其特征是,采用基于脉搏波传导速度的方法,精确、实时采集、计算加压部位的血液回流时刻,以此作为该点反搏的触发时刻;包括以下步骤:
(1)首先在被测者动脉树同一条脉络上任意选取两点,测出该两点之间的距离D,然后测出同一心跳周期内两点之间脉搏波传导的时间间隔T,利用公式:PWV=D/T,得出PWV为被测者该条脉络上的脉搏传播速度,也即为该经脉的血液流动速度;
(2)设置一体表长度相对指数ICL,其步骤是:
a、选取被测者身体上同一脉络上两点之间的距离为一基准长度P,
b、在所述的该脉络上选取任意一点作为参考点,参考点与测量点同一脉络,测得参考点距测量点之间的距离为P1-P2
c、将所述的P、P1-P2利用公式: I CL = P 1 - P 2 P , 得出体表长度相对指数ICL;因为同一脉络上血液流动速度PWV一定,所以
Figure F2009100191667C00012
Figure F2009100191667C00013
(3)采集所述参考点的血液波动的时刻T1
(4)根据已知的血液流动速度,算得血液流经基准长度P所用的时间段Ta
(5)将步骤(2)的ICL、步骤(3)的T1、步骤(4)的Ta代入公式:Tt=T1+ICLTa,得到Tt为所述测量点的血液波动的时刻,即为该测量点的触发时刻,也即为该测量点最佳施加反搏压力时刻。
2.根据权利要求1所述的一种自动计算并寻找最佳施加反搏压力时刻的方法,其特征是:在步骤(2)中,所述基准长度P可取被测者的踝骨部位到某一脚趾端部的距离。
3.根据权利要求1所述的一种自动计算并寻找最佳施加反搏压力时刻的方法,其特征是:在步骤(2)中,所述基准长度P可取被测者的踝骨部位到膝盖处的距离。
4.根据权利要求1或2或3所述的一种自动计算并寻找最佳施加反搏压力时刻的方法,其特征是:步骤(2)中所述参考点可为在远动脉端选取的一点。
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CN1078136A (zh) * 1992-05-07 1993-11-10 中山医科大学生物医学工程开发中心 一种体外反搏装置的控制方法
CN1195510A (zh) * 1997-06-28 1998-10-14 北京工业大学 体外反搏的控制方法及其装置

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CN1078136A (zh) * 1992-05-07 1993-11-10 中山医科大学生物医学工程开发中心 一种体外反搏装置的控制方法
CN1195510A (zh) * 1997-06-28 1998-10-14 北京工业大学 体外反搏的控制方法及其装置

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