Quantitative comparison of entropy analysis of fetal heart rate variability related to the different stages of labor

Jongil Lim; Ji Young Kwon; Juhee Song; Hosoon Choi; Jong Chul Shin; In Yang Park

doi:10.1016/j.earlhumdev.2013.12.007

Quantitative comparison of entropy analysis of fetal heart rate variability related to the different stages of labor

Jongil Lim
, Ji Young Kwon
, Juhee Song
, Hosoon Choi
, Jong Chul Shin
, In Yang Park

Department of Obstetrics and Gynecology

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Background: The interpretation of the fetal heart rate (FHR) signal considering labor progression may improve perinatal morbidity and mortality. However, there have been few studies that evaluate the fetus in each labor stage quantitatively. Aim: To evaluate whether the entropy indices of FHR are different according to labor progression. Study design: A retrospective comparative study of FHR recordings in three groups: 280 recordings in the second stage of labor before vaginal delivery, 31 recordings in the first stage of labor before emergency cesarean delivery, and 23 recordings in the pre-labor before elective cesarean delivery. Subjects: The stored FHR recordings of external cardiotocography during labor. Outcome measures: Approximate entropy (ApEn) and sample entropy (SampEn) for the final 2000 RR intervals. Results: The median ApEn and SampEn for the 2000 RR intervals showed the lowest values in the second stage of labor, followed by the emergency cesarean group and the elective cesarean group for all time segments (all P<. 0.001). Also, in the second stage of labor, the final 5. min of 2000 RR intervals had a significantly lower median ApEn (0.49 vs. 0.44, P= 0.001) and lower median SampEn (0.34 vs. 0.29, P<. 0.001) than the initial 5. min of 2000 RR intervals. Conclusions: Entropy indices of FHR were significantly different according to labor progression. This result supports the necessity of considering labor progression when developing intrapartum fetal monitoring using the entropy indices of FHR.

Original language	English
Pages (from-to)	81-85
Number of pages	5
Journal	Early Human Development
Volume	90
Issue number	2
DOIs	https://doi.org/10.1016/j.earlhumdev.2013.12.007
State	Published - Feb 2014

Bibliographical note

Funding Information:
Financial support for this study was provided by a grant from Seoul Saint Mary Hospital 2012 research fund.

Keywords

Approximate entropy
Cardiotocography
Fetal heart rate
Labor progression
Sample entropy

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10.1016/j.earlhumdev.2013.12.007

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title = "Quantitative comparison of entropy analysis of fetal heart rate variability related to the different stages of labor",

abstract = "Background: The interpretation of the fetal heart rate (FHR) signal considering labor progression may improve perinatal morbidity and mortality. However, there have been few studies that evaluate the fetus in each labor stage quantitatively. Aim: To evaluate whether the entropy indices of FHR are different according to labor progression. Study design: A retrospective comparative study of FHR recordings in three groups: 280 recordings in the second stage of labor before vaginal delivery, 31 recordings in the first stage of labor before emergency cesarean delivery, and 23 recordings in the pre-labor before elective cesarean delivery. Subjects: The stored FHR recordings of external cardiotocography during labor. Outcome measures: Approximate entropy (ApEn) and sample entropy (SampEn) for the final 2000 RR intervals. Results: The median ApEn and SampEn for the 2000 RR intervals showed the lowest values in the second stage of labor, followed by the emergency cesarean group and the elective cesarean group for all time segments (all P<. 0.001). Also, in the second stage of labor, the final 5. min of 2000 RR intervals had a significantly lower median ApEn (0.49 vs. 0.44, P= 0.001) and lower median SampEn (0.34 vs. 0.29, P<. 0.001) than the initial 5. min of 2000 RR intervals. Conclusions: Entropy indices of FHR were significantly different according to labor progression. This result supports the necessity of considering labor progression when developing intrapartum fetal monitoring using the entropy indices of FHR.",

keywords = "Approximate entropy, Cardiotocography, Fetal heart rate, Labor progression, Sample entropy",

author = "Jongil Lim and Kwon, \{Ji Young\} and Juhee Song and Hosoon Choi and Shin, \{Jong Chul\} and Park, \{In Yang\}",

note = "Funding Information: Financial support for this study was provided by a grant from Seoul Saint Mary Hospital 2012 research fund.",

year = "2014",

month = feb,

doi = "10.1016/j.earlhumdev.2013.12.007",

language = "English",

volume = "90",

pages = "81--85",

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T1 - Quantitative comparison of entropy analysis of fetal heart rate variability related to the different stages of labor

AU - Lim, Jongil

AU - Kwon, Ji Young

AU - Song, Juhee

AU - Choi, Hosoon

AU - Shin, Jong Chul

AU - Park, In Yang

N1 - Funding Information: Financial support for this study was provided by a grant from Seoul Saint Mary Hospital 2012 research fund.

PY - 2014/2

Y1 - 2014/2

N2 - Background: The interpretation of the fetal heart rate (FHR) signal considering labor progression may improve perinatal morbidity and mortality. However, there have been few studies that evaluate the fetus in each labor stage quantitatively. Aim: To evaluate whether the entropy indices of FHR are different according to labor progression. Study design: A retrospective comparative study of FHR recordings in three groups: 280 recordings in the second stage of labor before vaginal delivery, 31 recordings in the first stage of labor before emergency cesarean delivery, and 23 recordings in the pre-labor before elective cesarean delivery. Subjects: The stored FHR recordings of external cardiotocography during labor. Outcome measures: Approximate entropy (ApEn) and sample entropy (SampEn) for the final 2000 RR intervals. Results: The median ApEn and SampEn for the 2000 RR intervals showed the lowest values in the second stage of labor, followed by the emergency cesarean group and the elective cesarean group for all time segments (all P<. 0.001). Also, in the second stage of labor, the final 5. min of 2000 RR intervals had a significantly lower median ApEn (0.49 vs. 0.44, P= 0.001) and lower median SampEn (0.34 vs. 0.29, P<. 0.001) than the initial 5. min of 2000 RR intervals. Conclusions: Entropy indices of FHR were significantly different according to labor progression. This result supports the necessity of considering labor progression when developing intrapartum fetal monitoring using the entropy indices of FHR.

AB - Background: The interpretation of the fetal heart rate (FHR) signal considering labor progression may improve perinatal morbidity and mortality. However, there have been few studies that evaluate the fetus in each labor stage quantitatively. Aim: To evaluate whether the entropy indices of FHR are different according to labor progression. Study design: A retrospective comparative study of FHR recordings in three groups: 280 recordings in the second stage of labor before vaginal delivery, 31 recordings in the first stage of labor before emergency cesarean delivery, and 23 recordings in the pre-labor before elective cesarean delivery. Subjects: The stored FHR recordings of external cardiotocography during labor. Outcome measures: Approximate entropy (ApEn) and sample entropy (SampEn) for the final 2000 RR intervals. Results: The median ApEn and SampEn for the 2000 RR intervals showed the lowest values in the second stage of labor, followed by the emergency cesarean group and the elective cesarean group for all time segments (all P<. 0.001). Also, in the second stage of labor, the final 5. min of 2000 RR intervals had a significantly lower median ApEn (0.49 vs. 0.44, P= 0.001) and lower median SampEn (0.34 vs. 0.29, P<. 0.001) than the initial 5. min of 2000 RR intervals. Conclusions: Entropy indices of FHR were significantly different according to labor progression. This result supports the necessity of considering labor progression when developing intrapartum fetal monitoring using the entropy indices of FHR.

KW - Approximate entropy

KW - Cardiotocography

KW - Fetal heart rate

KW - Labor progression

KW - Sample entropy

UR - https://www.scopus.com/pages/publications/84893661436

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DO - 10.1016/j.earlhumdev.2013.12.007

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SN - 0378-3782

VL - 90

SP - 81

EP - 85

JO - Early Human Development

JF - Early Human Development

IS - 2

ER -

Quantitative comparison of entropy analysis of fetal heart rate variability related to the different stages of labor

Abstract

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Keywords

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