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Cardiotocography : ウィキペディア英語版
Cardiotocography

In medicine (obstetrics), cardiotocography (CTG) is a technical means of recording the fetal heartbeat and the uterine contractions during pregnancy. The machine used to perform the monitoring is called a cardiotocograph, more commonly known as an electronic fetal monitor (EFM).
Fetal monitoring was invented by Doctors Alan Bradfield, Orvan Hess and Edward Hon. A refined (antepartal, non-invasive, beat-to-beat) version (cardiotocograph) was later developed for Hewlett Packard by Konrad Hammacher.
== Method ==

External cardiotocography- for continuous or intermittent monitoring
The fetal heart rate and the activity of the uterine muscle are detected by two transducers placed on the mother’'s abdomen (one above the fetal heart and the other at the fundus).
Doppler ultrasound provides the information which is recorded on a paper strip known as a cardiotocograph (CTG).〔(). By Alfirevic Z, Devane D, Gyte GML, 2013.〕
Internal cardiotocography- uses an electronic transducer connected directly to the fetal scalp. A wire electrode is attached to the fetal scalp through the cervical opening and is connected to the monitor. This type of electrode is sometimes called a spiral or scalp electrode. Internal monitoring provides a more accurate and consistent transmission of the fetal heart rate than external monitoring because factors such as movement do not affect it. Internal monitoring may be used when external monitoring of the fetal heart rate is inadequate, or closer surveillance is needed.〔() External and Internal Heart Rate Monitoring of the Fetus〕
A typical CTG reading is printed on paper and/or stored on a computer for later reference. A variety of systems for centralized viewing of CTG have been installed in a large number of maternity hospitals in industrialised countries, allowing simultaneous monitoring of multiple tracings in one or more locations. Display of maternal vital signs, ST signals and an electronic partogram are available in the majority of these systems. A few of them have incorporated computer analysis of cardiotocographic signals or combined cardiotocographic and ST data analysis.〔http://www.degruyter.com/view/j/jpme.2013.41.issue-1/jpm-2012-0067/jpm-2012-0067.xml〕
〔http://onlinelibrary.wiley.com/doi/10.1002/14651858.CD006066.pub2/pdf〕
〔http://pennmedicine.adam.com/content.aspx?productId=14&pid=14&gid=000138〕
〔http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1676479/pdf/bmj00006-0005.pdf〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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