Analysis of Fetal Movements by Doppler Actocardiogram and Fetal B-Mode Imaging

Maeda, Kazuo; Tatsumura, M.; Utsu, Masaji

doi:10.1016/s0095-5108(18)30022-8

Cited by 41 publications

(26 citation statements)

References 3 publications

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“…Reliability studies comparing actograph-based versus ultrasound-visualized fetal movements have found the performance of this monitor to be highly accurate in detecting both fetal motor activity and quiescence. 21,22 Fetal data were collected from the output port of the monitor and digitized through an A/D board using streaming software. Data were analyzed off-line using software developed in our laboratory.…”

Section: Methodsmentioning

confidence: 99%

Choroid plexus cysts do not affect fetal neurodevelopment

DiPietro

Costigan

Cristofalo³

et al. 2006

J Perinatol

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Objective: To determine whether an isolated finding of a choroid plexus cyst (CPC) during routine ultrasound is associated with altered fetal growth or development.Study design: Prospective, case-control study comparing 35 CPC cases to 67 controls. Neurobehavioral development assessment included 50 min long serial recordings of heart rate, motor activity and their interrelation at 24, 28, 32 and 36 weeks gestation. Growth measurement was based on three ultrasound evaluations of femur length, biparietal diameter, head circumference and abdominal circumference at initial exam, 28 and 36 weeks.Results: Longitudinal analyses revealed no differences in fetal heart rate, variability or accelerations; the number or duration of fetal movements or total motor activity; nor fetal movement-fetal heart rate coupling. CPC cases had slightly smaller head and abdominal circumferences at 28 weeks, but these differences had disappeared by 36 weeks. CPC detection was more common when routine exams were conducted earlier (18.8 versus 19.5 weeks; P<0.01). Conclusion:Despite the presumption that CPCs with normal karyotypes are benign variants, little empirical support exists. These results indicate that CPCs detected by prenatal ultrasound do not pose or reveal a threat to fetal development.

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Section: Methodsmentioning

confidence: 99%

Choroid plexus cysts do not affect fetal neurodevelopment

DiPietro

Costigan

Cristofalo³

et al. 2006

J Perinatol

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“…The actograph detects fetal movements by preserving the remaining signal after bandpassing frequency components of the Doppler signal that are associated with FHR and maternal somatic activity. Reliability studies comparing actograph based versus ultrasound visualized fetal movements have found the performance of this monitor to be highly accurate in detecting both fetal motor activity and quiescence (Besinger & Johnson, 1989;DiPietro, Costigan, & Pressman, 1999;Maeda, Tatsumura, & Utsu, 1999).…”

Section: Maternal-fetal Monitoringmentioning

confidence: 99%

Fetal responses to induced maternal relaxation during pregnancy

DiPietro

Costigan

Nelson

et al. 2008

Biological Psychology

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Fetal responses to induced maternal relaxation during the 32 nd week of pregnancy were recorded in 100 maternal-fetal pairs using a digitized data collection system. The 18-minute guided imagery relaxation manipulation generated significant changes in maternal heart rate, skin conductance, respiration period, and respiratory sinus arrhythmia. Significant alterations in fetal neurobehavior were observed, including decreased fetal heart rate (FHR), increased FHR variability, suppression of fetal motor activity (FM), and increased FM-FHR coupling. Attribution of the two fetal cardiac responses to the guided imagery procedure itself, as opposed to simple rest or recumbency, is tempered by the observed pattern of response. Evaluation of correspondence between changes within individual maternal-fetal pairs revealed significant associations between maternal autonomic measures and fetal cardiac patterns, lower umbilical and uterine artery resistance and increased FHR variability, and declining salivary cortisol and FM activity. Potential mechanisms that may mediate the observed results are discussed.

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“…Acoustic power of the speaker was expressed by decibel (dB), which was determined by an audiometer at 1 meter distance. The speaker was placed covering maternal abdomen, and the sound stimulation were done in the order of 250, 500 and 1,000 Hz, with 2S duration [4,5]. The fetus was stimulated with a photographic flush light, of which guide number was 25 [3].…”

Section: Methodsmentioning

confidence: 99%

Fetal Response to Sound and Light: Possible Fetal Education?

Maeda¹,

Tatsumura²

2017

J Neonatal Biol

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Purpose: To assess fetal well-being and education ability by fetal response to sound and light.Material: Intrauterine fetuses in late pregnancy. Methods:The sound source was a loud speaker connected to an audioamplifier, of which source was sine waves, generated in a stimulator. The sound power was measured by an audiometer. The loud speaker was placed at the pregnant abdomen. A photographic speed light, of which guide number was 25, was flushed at pregnant abdomen around at fetal face, in the photic stimulation.Results: Acoustic and visual stimulation effects were fetal movements and heart rate (FHR) acceleration in fetal actocardiogram. The stimulation with 1,000 Hz 80 decibel (dB) sound for 2 S produced positive effects at 28 weeks, while 60 dB sounds achieved positive effects in 40 weeks, namely, sound sensitivity increased 10 folds in late pregnancy. Although foetuses responded to 250 and 500 Hz sound in 28 and 40 weeks, sound intensity reduction was insignificant. Positive results to photic stimulation were noted in 23 or later weeks and 77% cases achieved positive results in 40 weeks.Discussion: Positive effect of sound and light stimulation was fetal movements and FHR acceleration, which were the sign of healthy fetal brain, while, significant sound power reduction was noted only in 1,000 Hz, higher frequency than maternal voice, thus, fetal education will not be expected, and mother voice should be changed to 1,000 Hz using a voice changer in fetal education, however, healthy fetal hearing is expected by the response to 250-1,000 Hz sound and the response to flush light is the sign of healthy fetal retina and light sensing.

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Analysis of Fetal Movements by Doppler Actocardiogram and Fetal B-Mode Imaging

Cited by 41 publications

References 3 publications

Choroid plexus cysts do not affect fetal neurodevelopment

Choroid plexus cysts do not affect fetal neurodevelopment

Fetal responses to induced maternal relaxation during pregnancy

Fetal Response to Sound and Light: Possible Fetal Education?

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