为了提高的有效提取胎儿心率和防止子宫内胎儿窘迫,胎儿心率特征提取的研究基于小波变换提出了防止在子宫内胎儿窘迫。本文采用一种胎儿心率检测方法基于二进制小波变换系数的最大值。多普勒胎儿心脏的方法是模拟信号从诊所获得。与原曲线相比,转换后的曲线大致可以看到原始信号的变化规律和确定信号的峰值点,但是由于大峰值点的干扰,对计算机处理的影响也是巨大的。转换后的信号的周期性大大地增强,使其更容易处理计算。共有300名孕妇足月胎儿心脏监测从2018年1月到2020年1月被选为研究对象,分为观察组和对照组。观察组包括100例胎儿心脏异常监控,和对照组由200名患者与正常胎儿心脏监测。子宫收缩,胎儿心率都被记录下来,和胎儿窘迫发生率,剖腹产,新生儿窒息,羊水和排泄物污染被观察到。胎儿窘迫的发病率,剖腹产,新生儿窒息,和羊水粪染观察组明显高于对照组。胎儿心脏监测能够准确地判断在孕妇和胎儿的情况及时诊断胎儿心率异常,有一个更好的对围产期婴儿的预后的影响,可以降低死亡率。 It can effectively solve the problems existing in the autocorrelation algorithm and extract the fetal heart rate more accurately. It is an effective improved scheme of fetal heart rate extraction. It is very helpful in preventing fetal distress in utero.
1。介绍gydF4y2Ba
宫内窘迫是常见的在临床实践中,这常常危及胎儿的生命,如果不及时治疗。电子监测在临床的广泛应用在过去的20年中,胎儿心脏的变化基准利率,基准利率的变化,和周期性的胎儿心率曲线通过监控记录描述,可作为预测或判断胎儿宫内状况的基础(gydF4y2Ba
1gydF4y2Ba]。胎儿心率模式与缺氧有关包括晚期减速,减少基线短期可变性,延长减速,正弦图,和基线心率变化(gydF4y2Ba
2gydF4y2Ba]。胎儿心率的方法提取基于小波变换进行了研究。它可以有效地解决问题的自相关算法和更准确地提取胎儿心率。它是一种有效的改善方案,胎儿心率提取。目前,与胎儿心率的快速发展和完善电子监控技术,胎儿心率电子监控技术的应用在中国一直很受欢迎,这是目前最常用的和最敏感的方法,监测胎儿在母体内的条件。这项技术的广泛应用已经成为重要手段在中国提高围产期保健水平。很难从腹部表面ECG信号中提取胎儿心电信号。主要原因是胎儿心电信号本身是一个非常微弱的信号,通常等噪声干扰的母体心电信号和水下EMG干扰;特别是母体心电信号幅度大于胎儿心电信号的振幅。此外,胎儿心电图和孕产妇心电图在时域和频域重叠。 The location of the fetal heart is difficult to determine, and the electrical conductivity from the fetus to the abdomen frequently changes during pregnancy. These characteristics make it very difficult to collect and observe fetal ECG signals, and it is difficult to extract clear and stable FECG by conventional methods. Independent component analysis (ICA) is a new technique of Blind Source Separation which has developed in recent years. This method is to find a linear coordinate system and make the generated signals statistically independent of each other as much as possible. Therefore, under certain conditions, the hidden independent source signals can be separated only by observing the signals. ICA technology has been applied to the extraction of fetal electrocardiogram and has achieved certain success. However, traditional ICA methods mostly use gradient method or Newton iteration method to optimize the separation matrix, which is easy to fall into the local optimal value, which affects the separation ability of ICA and cannot guarantee the orderly separation of signals. Intrauterine distress during delivery can lead to perinatal death, neonatal asphyxia, and permanent neurological dysfunction due to intracranial hypoxia. In order to avoid and timely detect fetal distress in utero and improve the quality of the population in China, fetal electronic monitor has been widely used. A normal baseline fetal heart rate can rule out the presence of fetal hypoxia [
3gydF4y2Ba]。胎儿心率异常,甚至某些类型的胎儿心率地图,可以高度怀疑胎儿风险但并不总是显示胎儿血氧不足的存在。胎儿心率的模式与缺氧有关迟到减速,减少基线短期可变性,延长减速,正弦和基线心率的变化。胎儿心率的变化是最明显的在子宫、胎儿窘迫的临床表现,也为临床诊断的主要基地之一。产前胎儿心脏监测方法,以确保胎儿的健康。该方法广泛应用于临床医学具有很高的准确性是用于胎儿窘迫。Warmerdam等人开始听胎儿心脏与孕妇的腹壁上的耳朵gydF4y2Ba
4gydF4y2Ba]。Kuberan介绍了胎儿心率的听诊器听诊(gydF4y2Ba
5gydF4y2Ba]。直到抢劫等人报道了电子监控技术的首次胎儿心率监测胎儿心率(进入了一个新的时代gydF4y2Ba
6gydF4y2Ba]。目前,胎儿监测市场上有或多或少的断丝,失真,加倍减半,和其他问题。胎儿心率变化很大时,计算结果不及时甚至准确gydF4y2Ba
7gydF4y2Ba]。因此,胎儿心率的方法提取基于小波变换进行了研究。它可以有效地解决存在的问题自相关算法和提取胎儿心率更准确地说,这是一个有效的改善方案,胎儿心率萃取(gydF4y2Ba
8gydF4y2Ba]。研究现状的基础上,本文基于小波变换的胎儿心率的提取方法,可以有效地解决自相关算法中存在的问题;更准确的提取胎儿心率心率是一种有效改善胎儿心率的提取。预防胎儿窘迫的是很有帮助的gydF4y2Ba
9gydF4y2Ba]。gydF4y2Ba
其中,100例胎儿心脏异常监测作为观察组,另200例孕妇与正常胎儿心脏监测作为对照组。电子胎儿心脏监测器是用于监控后,孕妇常规测量血压和脉搏。监测之前,孕妇应该吃适当没有药物,和室内环境应安静。医生监视胎儿心脏时,超声波探头监测胎儿心跳的声音放在最大的地方,和子宫收缩传感器感应紧张与3水平放置在子宫下手指,胎儿心率是记录。在监测过程中,孕妇应该躺在她的身边或仰卧位排空膀胱后,和医生应该修复带孕妇的腹壁。监测的速度通常是3 /分钟,和监测时间约为20分钟。监测期间,如果胎儿运动不明显或者没有胎儿的运动,它可以继续为20分钟根据监测和生物钟的周期,和胎儿运动应该正确记录。胎儿窘迫的发生率、新生儿窒息在剖腹产,观察和羊水粪污染。为了了解胎儿的储备能力,胎儿收缩和胎儿心率应该观察和记录。在缺乏外部负荷刺激和收缩,这是一个无压力的测试。 If the fetal heart rate accelerates more than 15/min and the fetus moves at least 3 times during the 20 minutes of fetal heart rate monitoring, it is considered as reactive fetal movement. If the fetal heart rate accelerates less than 15/min and the fetal movement is less than 3 times during the 40 min of fetal heart rate monitoring, or if the fetal heart rate does not accelerate during the fetal movement, it is considered as nonreactive fetal movement. The uterine stress test monitors the load changes of the placenta during transient hypoxia during uterine contraction and records the changes of fetal heart rate at the same time. This is the uterine stress test, and its judgment criteria are as follows: in the case of no obvious variation deceleration or late deceleration, those suggesting good placental function are negative [
15gydF4y2Ba]。一半的收缩与晚期减速或三宫缩每10分钟是积极的。如果有明显的变异减速或间歇性减速,这是判定为可疑阳性。胎儿窘迫的发病率,剖腹产,新生儿窒息,和排泄物污染的观察组100例患者明显高于对照组的200名患者,差异具有统计学意义(gydF4y2Ba
PgydF4y2Ba< 0.01),如表所示gydF4y2Ba
3gydF4y2Ba。gydF4y2Ba
提出了一种二进制小波变换模极大值的心率检测方法,该方法具体由临床心脏多普勒信号模拟,而转换后的原始信号曲线和原始曲线而用人眼可以看到变化规律和大致确定信号的峰值,但因为它的高峰扰动,它也会影响计算机的处理。转换后的信号的周期性大大地增强,而且更容易处理的计算。共有300名孕妇足月胎儿心脏监测从2018年1月到2020年1月被选为研究对象,分为观察组和对照组。观察组由100年异常胎儿心脏监测患者和对照组由200名患者与正常胎儿心脏监测。子宫收缩,胎儿心率都被记录下来,和胎儿窘迫发生率,剖腹产,新生儿窒息,羊水和排泄物污染被观察到。胎儿窘迫的发病率,剖腹产,新生儿窒息,羊水粪染色观察组明显高于对照组。胎儿心率监测能够准确地判断孕妇胎儿的状况;与此同时,它可以诊断胎儿心率异常,可以改善围产儿的预后儿童和降低死亡率。胎儿心脏监测的目的是了解胎儿在子宫内缺氧,提供正确的帮助来提高胎儿相关疾病的诊断。它提供了一个可靠的依据临床医师了解胎儿在子宫内缺氧,及时采取纠正措施。 Because the change of position can compress the umbilical cord at any time, and amniotic fluid effusion after membrane rupture and fetal decline almost all have effects on the umbilical cord, the degree is different. At this time, fetal heart monitoring results will be affected and cannot choose cesarean section too early. Therefore, the results of fetal heart monitoring should be comprehensively analyzed in the future to improve the accuracy of fetal intrauterine conditions and postnatal prediction.