Evaluation of 3-tier and 5-tier FHR pattern classifications using umbilical blood pH and base excess at delivery.
OBJECTIVE:The relevance between time-series fetal heart rate (FHR) pattern changes during labor and outcomes such as arterial blood gas data at delivery has not been studied. Using 3-tier and 5-tier classification systems, we studied the relationship between time-series FHR pattern changes before de...
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doaj-865b7c7ddb5f43f9af0f77bb6cf095ff2021-03-03T21:33:16ZengPublic Library of Science (PLoS)PLoS ONE1932-62032020-01-01152e022863010.1371/journal.pone.0228630Evaluation of 3-tier and 5-tier FHR pattern classifications using umbilical blood pH and base excess at delivery.Hitomi KikuchiShunichi NodaShinji KatsuragiTomoaki IkedaHiroyuki HorioOBJECTIVE:The relevance between time-series fetal heart rate (FHR) pattern changes during labor and outcomes such as arterial blood gas data at delivery has not been studied. Using 3-tier and 5-tier classification systems, we studied the relationship between time-series FHR pattern changes before delivery and umbilical artery blood gas data at delivery. METHODS:The subjects were 1,909 low-risk women with vaginal delivery (age: 29.1 ± 4.4 years, parity: 1.7 ± 0.8). FHR patterns were classified by a skilled obstetrician based on each 10 min-segment of the last 60 min before delivery from continuous CTG records in an obstetric clinic. RESULTS:The relationship between each 10 min-segment FHR pattern classification from 60 minutes before delivery and umbilical artery blood pH and base excess (BE) values at delivery changed with time. In the 3-tier classification, mean pH of Category I group in each 10 min-segment was significantly higher than that of Category II group. For Category I groups in each 10-minute segment, its number decreased and its average pH increased as the delivery time approached. In the 5-tier classification, there was the same tendency. About each level group in 10 min-segment, the higher the level, the lower the blood gas values, and mean pH of higher level groups decreased as the delivery time approached. CONCLUSIONS:The relationship between classifications and outcomes was clear at any time from 60 min before delivery in 3- and 5-tier classifications, and the 5-tier classification was more relevant.https://doi.org/10.1371/journal.pone.0228630 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hitomi Kikuchi Shunichi Noda Shinji Katsuragi Tomoaki Ikeda Hiroyuki Horio |
spellingShingle |
Hitomi Kikuchi Shunichi Noda Shinji Katsuragi Tomoaki Ikeda Hiroyuki Horio Evaluation of 3-tier and 5-tier FHR pattern classifications using umbilical blood pH and base excess at delivery. PLoS ONE |
author_facet |
Hitomi Kikuchi Shunichi Noda Shinji Katsuragi Tomoaki Ikeda Hiroyuki Horio |
author_sort |
Hitomi Kikuchi |
title |
Evaluation of 3-tier and 5-tier FHR pattern classifications using umbilical blood pH and base excess at delivery. |
title_short |
Evaluation of 3-tier and 5-tier FHR pattern classifications using umbilical blood pH and base excess at delivery. |
title_full |
Evaluation of 3-tier and 5-tier FHR pattern classifications using umbilical blood pH and base excess at delivery. |
title_fullStr |
Evaluation of 3-tier and 5-tier FHR pattern classifications using umbilical blood pH and base excess at delivery. |
title_full_unstemmed |
Evaluation of 3-tier and 5-tier FHR pattern classifications using umbilical blood pH and base excess at delivery. |
title_sort |
evaluation of 3-tier and 5-tier fhr pattern classifications using umbilical blood ph and base excess at delivery. |
publisher |
Public Library of Science (PLoS) |
series |
PLoS ONE |
issn |
1932-6203 |
publishDate |
2020-01-01 |
description |
OBJECTIVE:The relevance between time-series fetal heart rate (FHR) pattern changes during labor and outcomes such as arterial blood gas data at delivery has not been studied. Using 3-tier and 5-tier classification systems, we studied the relationship between time-series FHR pattern changes before delivery and umbilical artery blood gas data at delivery. METHODS:The subjects were 1,909 low-risk women with vaginal delivery (age: 29.1 ± 4.4 years, parity: 1.7 ± 0.8). FHR patterns were classified by a skilled obstetrician based on each 10 min-segment of the last 60 min before delivery from continuous CTG records in an obstetric clinic. RESULTS:The relationship between each 10 min-segment FHR pattern classification from 60 minutes before delivery and umbilical artery blood pH and base excess (BE) values at delivery changed with time. In the 3-tier classification, mean pH of Category I group in each 10 min-segment was significantly higher than that of Category II group. For Category I groups in each 10-minute segment, its number decreased and its average pH increased as the delivery time approached. In the 5-tier classification, there was the same tendency. About each level group in 10 min-segment, the higher the level, the lower the blood gas values, and mean pH of higher level groups decreased as the delivery time approached. CONCLUSIONS:The relationship between classifications and outcomes was clear at any time from 60 min before delivery in 3- and 5-tier classifications, and the 5-tier classification was more relevant. |
url |
https://doi.org/10.1371/journal.pone.0228630 |
work_keys_str_mv |
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