OBJECTIVE: The aim of the study was to determinate whether maternal position during the non-stress test (NST) in different weeks of pregnancy influences fetal heart rate patterns. MATERIALS AND METHODS: A total of 1055 NST lasting 30 min were performed in 368 autochthonous mothers with low-risk pregnancies. On the basis of maternal position during the test we divided into three groups: reclining, sitting, and walking. The cardiotocographic parameters considered were: number of minutes of reactive NST with minimum length, number of fetal movements, fetal heart rate baseline, number of large accelerations, number of dubious NST, and number of variable decelerations. RESULTS: Fetal heart rate patterns in low-risk pregnancies were studied using NST in different gestational ages and in different maternal positions. Differences in heart rate were found in relationship to both gestational age and maternal position. The minimum length of NST necessary to record at least three large accelerations was significantly different in relationship to both gestational age and maternal position. The number of fetal movements perceived by the mother was greater in the reclining position than in sitting or walking. Together with the progression of pregnancy, the number of dubious NST decreased in all subgroups, especially in the sitting position. The greatest number of variable decelerations was observed in the reclining position and it was increased with pregnancy progression. The NST duration did not vary greatly in the reclining position, but in the sitting position or during walking, the time taken to record the three large accelerations required to define the trace as reactive, decreased significantly with the progression of pregnancy CONCLUSIONS: Non-stress test in sitting position or during walking should be encouraged because fetal reactivity is more quickly observed.
OBJECTIVE: The aim of the study was to determinate whether maternal position during the non-stress test (NST) in different weeks of pregnancy influences fetal heart rate patterns. MATERIALS AND METHODS: A total of 1055 NST lasting 30 min were performed in 368 autochthonous mothers with low-risk pregnancies. On the basis of maternal position during the test we divided into three groups: reclining, sitting, and walking. The cardiotocographic parameters considered were: number of minutes of reactive NST with minimum length, number of fetal movements, fetal heart rate baseline, number of large accelerations, number of dubious NST, and number of variable decelerations. RESULTS: Fetal heart rate patterns in low-risk pregnancies were studied using NST in different gestational ages and in different maternal positions. Differences in heart rate were found in relationship to both gestational age and maternal position. The minimum length of NST necessary to record at least three large accelerations was significantly different in relationship to both gestational age and maternal position. The number of fetal movements perceived by the mother was greater in the reclining position than in sitting or walking. Together with the progression of pregnancy, the number of dubious NST decreased in all subgroups, especially in the sitting position. The greatest number of variable decelerations was observed in the reclining position and it was increased with pregnancy progression. The NST duration did not vary greatly in the reclining position, but in the sitting position or during walking, the time taken to record the three large accelerations required to define the trace as reactive, decreased significantly with the progression of pregnancy CONCLUSIONS: Non-stress test in sitting position or during walking should be encouraged because fetal reactivity is more quickly observed.
Authors: Alexander E P Heazell; Jayne Budd; Minglan Li; Robin Cronin; Billie Bradford; Lesley M E McCowan; Edwin A Mitchell; Tomasina Stacey; Bill Martin; Devender Roberts; John M D Thompson Journal: BMJ Open Date: 2018-07-06 Impact factor: 2.692
Authors: Billie F Bradford; Robin S Cronin; Christopher J D McKinlay; John M D Thompson; Edwin A Mitchell; Peter R Stone; Lesley M E McCowan Journal: PLoS One Date: 2019-06-12 Impact factor: 3.240
Authors: Dennis Ryu; Dong Hyun Kim; Joan T Price; Jong Yoon Lee; Ha Uk Chung; Emily Allen; Jessica R Walter; Hyoyoung Jeong; Jingyue Cao; Elena Kulikova; Hajar Abu-Zayed; Rachel Lee; Knute L Martell; Michael Zhang; Brianna R Kampmeier; Marc Hill; JooHee Lee; Edward Kim; Yerim Park; Hokyung Jang; Hany Arafa; Claire Liu; Maureen Chisembele; Bellington Vwalika; Ntazana Sindano; M Bridget Spelke; Amy S Paller; Ashish Premkumar; William A Grobman; Jeffrey S A Stringer; John A Rogers; Shuai Xu Journal: Proc Natl Acad Sci U S A Date: 2021-05-18 Impact factor: 11.205
Authors: Eli Saastad; Julie Victoria Holm Tveit; Vicki Flenady; Babill Stray-Pedersen; Ruth C Fretts; Per E Børdahl; J Frederik Frøen Journal: BMC Res Notes Date: 2010-01-04
Authors: Eline L M van Manen; Martine Hollander; Esther Feijen-de Jong; Ank de Jonge; Corine Verhoeven; Janneke Gitsels Journal: PLoS One Date: 2021-06-17 Impact factor: 3.240