| Fetal movement detection: comparison of the Toitu actograph with ultrasound from 20 weeks gestation. | |
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MedLine Citation:
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PMID: 10582855 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: This study evaluates the validity of Doppler-detected fetal movement by a commercially available monitor and investigates whether characteristics of maternal body habitus and the intrauterine environment affect its performance. METHODS: Fetal movement was evaluated in normal pregnancies using both ultrasound visualization and a fetal actocardiograph (Toitu MT320; Tofa Medical Inc., Malvern, PA). Data were collected for 32 min on 34 fetuses stratified by gestational age (20-25 weeks; 28-32 weeks; 35-39 weeks). Fetal and maternal characteristics were recorded. Comparisons between ultrasound-detected trunk and limb movements and actograph records were conducted based both on 10-s time intervals and on detection of individual movements. RESULTS: Time-based comparisons indicated agreement between ultrasound and actograph 94.7% of the time; this association rose to 98% when movements of less than 1 s duration were excluded. Individual movements observed on ultrasound were detected by the actograph 91% of the time, and 97% of the time when brief, isolated movements were excluded. The overall kappa value for agreement was 0.88. The actograph was reliable in detecting periods of quiescence as well as activity. These findings did not vary by gestational age. The number of movements detected by the actograph, but not the single-transducer ultrasound, significantly increased over gestation. Maternal age, parity, weight, height, or body mass index were not consistently associated with actograph validity. Characteristics of the uterine environment, including placenta location, fetal presentation, and amniotic fluid volume also did not affect results. CONCLUSIONS: The Toitu actograph accurately detects fetal movement and quiescence from as early as 20 weeks gestation and has utility in both clinical and research settings. Actographs are most useful for providing objective and quantifiable measures of fetal activity level, including number and duration of movements, while visualization through ultrasound is necessary for studies of movement quality, source, or mechanics. |
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Authors:
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J A DiPietro; K A Costigan; E K Pressman |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The Journal of maternal-fetal medicine Volume: 8 ISSN: 1057-0802 ISO Abbreviation: J Matern Fetal Med Publication Date: 1999 Nov-Dec |
Date Detail:
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Created Date: 2000-01-07 Completed Date: 2000-01-07 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 9211288 Medline TA: J Matern Fetal Med Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 237-42 Citation Subset: IM |
Affiliation:
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Department of Population and Family Health Sciences, Johns Hopkins University, Baltimore, Maryland 21205, USA. jdipietr@welchlink.welch.jhu.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Analysis of Variance Echocardiography* Embryonic and Fetal Development Female Fetal Heart / physiology* Fetal Movement / physiology* Fetus / physiology* Gestational Age Humans Pregnancy Reproducibility of Results Ultrasonography, Doppler Ultrasonography, Prenatal* |
| Grant Support | |
ID/Acronym/Agency:
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R01HD27592/HD/NICHD NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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