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DEVELOPMENT OF AUTOMATED FETAL ACTOGRAM ANALYZER FOR FETAL BEHAVIOR STATES

胎儿行为状态自动胎儿活动图分析仪的开发

基本信息

批准号：
60870058
负责人：
MAEDA KAZUO
金额：
$ 4.35万
依托单位：
TOTTORI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

项目摘要

Fetal actocardiogram is the record of the fetal gross movement with the spikes which are formed by low frequency ultrasonic Doppler signal that is produced by the fetal movement. The fetal heart rate is recorded simultaneously with the movement. The third trimester is the main period of the examination. Fetal active state is clearly distinguished from the resting state with the burstlike grouping of the spike which is associated with FHR acceleration. Latent fetal distress is easily diagnosed by the loss of acceleration in the presence of fetal movement bursts. Electrical outputs of the actocardiograph was introduced into AD converter and the data were stored in floppy disc. The data were reproduced and analysed by PC98XA computer. Results were displayed on color display. The displays of FHR, fetal movement spikes, contraction, instantaneous rate of the spikes and that of the burst showed the active and resting phases clearly. The amplitude is high, the SD and CV are large in the active state. The interval was the same as the amplitude. Interval histogram of the active state is composed of high incidence at low voltage and short interval, but the data distributed in wide area of the histogram until high amplitude in the active state. The resting state shows very small values in all parameters and interval histograms. The histogram of the breathing movement shows the peaks in low amplitude, but it is higher than that of the resting state. After envelope processing, several peaks are observed in the active state, but no envelope in the resting state. Fetal breathing movement produced flat but elevated line after envelope formation, and the level is higher than the resting state.The results will be promissing in the recognition of every state. The automatic technique will be valuable in the analysis of fetal condition.

胎儿心动图是胎儿运动时产生的低频超声多普勒信号所形成的棘波对胎儿大体运动的记录。胎心率与胎动同时记录。孕晚期是检查的主要时期。胎儿活动状态与静息状态明显不同，其峰电位呈爆发状分组，与FHR加速相关。潜伏性胎儿窘迫很容易诊断的加速度的损失存在的胎动爆发。心电图机的输出信号经模数转换器转换后存入软盘。数据用PC-98 XA计算机再现和分析。结果显示在彩色显示器上。FHR、胎动峰电位、宫缩、峰电位瞬时率和爆发波瞬时率的显示清楚地显示了活动期和静息期。在激活状态下，振幅高，SD和CV大。间隔与振幅相同。激活状态的区间直方图由低电压下的高发生率和短间隔组成，但数据分布在直方图的宽区域，直到激活状态的高振幅。静息状态在所有参数和间隔直方图中显示非常小的值。呼吸运动的直方图显示低幅度的峰，但其高于静息状态的峰。包络处理后，在活动状态下观察到几个峰，但在静息状态下没有包络。胎儿呼吸运动在包络形成后产生平坦但升高的线，其水平高于静息状态，这一结果对各种状态的识别都有希望。自动化技术在胎儿状况分析中具有重要的应用价值。