Computer analysis of antepartum fetal heart rate: 1. Baseline determination |
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| Affiliation: | 1. Dept. of Obstetrics and Gynaecology, Academisch Ziekenhuis Vrije Universiteit, De Boelaan 1117, 1007 MB Amsterdam The Netherlands;2. Dept. of Obstetrics and Gynaecology, Academisch Ziekenhuis, Nijmegen The Netherlands;1. Electronics and Communication Engineering, Karunya Institute of Technology & Sciences, Coimbatore 641114, India;2. Computer Science and Engineering, Karunya Institute of Technology & Sciences, Coimbatore 641114, India;1. Department of Electrical Engineering and Computer Science, University of Stavanger, Stavanger, Norway;2. Department of Electrical Engineering and Computer Science, Northwestern University, IL, United States;3. Research Institute, Haydom Lutheran Hospital, Haydom, Manyara, Tanzania;4. Department of Obstetrics and Gynaecology, Muhimbili National Hospital/MUHAS, Dar Es Salaam, Tanzania;5. Department of Anesthesiology and Intensive Care, Stavanger University Hospital, Norway;6. Department of Health Sciences, University of Stavanger, Stavanger, Norway;1. The Ritchie Centre, Monash Institute of Medical Research, Monash University, 27-31 Wright St, Clayton, Victoria, 3168, Australia;2. Department of Obstetrics and Gynaecology, Monash University, Clayton, Victoria, 3168, Australia;1. School of Women’s and Infants’ Health, ARC Centre of Excellence, The University of Western Australia, Perth, Western Australia, Australia;2. Centre for Microscopy, Characterisation and Analysis, ARC Centre of Excellence, The University of Western Australia, Perth, Western Australia, Australia;3. Centre for Perinatal and Neonatal Medicine, Tohoku University Hospital, Sendai, Japan;4. Blood, Stem Cell, and Cancer Research Group, St Vincent’s Centre for Applied Medical Research, Sydney, New South Wales, Australia;5. GlaxoSmith Kline, King of Prussia, PA;6. Cincinnati Children’s Hospital Medical Centre, Cincinnati, OH;7. Maastricht University Medical Centre, Maastricht, The Netherlands;1. Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan;2. Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan |
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| Abstract: | A consequent and reproducible determination of baseline is an essential prerequisite for objective interpretation of fetal heart rate. A fully automated off-line method of baseline determination has been developed and tested on 50 normal antepartum fetal heart rate recordings of two hours duration. The method is constructed around two functional units, a digital filter and a trim function, which interact in an iterative process. The results were evaluated in comparison with automated baseline determination according to Dawes and coworkers. A panel of 3 experts agreed that in 14 of the 50 recordings (28%), the new developed procedure resulted in a substantially better baseline fit. In the remaining 34 recordings (72%), baseline fit from both methods was judged as equivalent. The described procedure of baseline determination provides a solid base for automated detection of accelerations and decelerations in fetal heart rate recordings. It enables the study of the relation between the fetal heart rate pattern and fetal movements. Finally, it provides an objective tool for analysis of variables within the fetal heart rate with the highest predictive value with respect to fetal outcome. |
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