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Computerizing the Cardiotocogram (CTG)
Abstract
During pregnancy the fetus requires an adequate supply of oxygen and clearance of carbon dioxide which is a waste product of metabolism. In fetal life, the placenta provides this function. After birth the lungs are aerated and perform this. If there is a failure to transport these chemicals across the placenta, the fetus can become hypoxic and acidotic, which can lead to permanent brain damage. In the neonate this can manifest in a number of ways, but most seriously cerebral palsy. Assessment of the fetal heart rate has been shown to identify fetuses where this maybe occurring. However the inter observer variation amongst clinicians assessing the heart rate monitoring is high and interpretation skills are often not good. Computer assessment of the fetal heart rate has been used and developed. Expert system techniques have been used to develop a system. The systems developed have been shown in studies to perform better than humans and to be able to identify subtleties not seen by the human eye. Future research is further assessing the value of these systems.
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