Phase Entropy Analysis of Electrohysterographic Data at the Third Trimester of Human Pregnancy and Active Parturition

Phase Entropy (PhEn) was recently introduced for evaluating the nonlinear features of physiological time series. PhEn has been demonstrated to be a robust approach in comparison to other entropy-based methods to achieve this goal. In this context, the present study aimed to analyze the nonlinear features of raw electrohysterogram (EHG) time series collected from women at the third trimester of pregnancy (TT) and later during term active parturition (P) by PhEn. We collected 10-min longitudinal transabdominal recordings of 24 low-risk pregnant women at TT (from 35 to 38 weeks of pregnancy) and P (>39 weeks of pregnancy). We computed the second-order difference plots (SODPs) for the TT and P stages, and we evaluated the PhEn by modifying the k value, a coarse-graining parameter. Our results pointed out that PhEn in TT is characterized by a higher likelihood of manifesting nonlinear dynamics compared to the P condition. However, both conditions maintain percentages of nonlinear series higher than 66%. We conclude that the nonlinear features appear to be retained for both stages of pregnancy despite the uterine and cervical reorganization process that occurs in the transition from the third trimester to parturition.

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Composite Multiscale Partial Cross-Sample Entropy Analysis for Quantifying Intrinsic Similarity of Two Time Series Affected by Common External Factors

Entropy ◽

10.3390/e22091003 ◽

2020 ◽

Vol 22 (9) ◽

pp. 1003 ◽

Cited By ~ 1

Author(s):

Baogen Li ◽

Guosheng Han ◽

Shan Jiang ◽

Zuguo Yu

Keyword(s):

Time Series ◽

Stock Exchange ◽

Composite Index ◽

Sample Entropy ◽

External Factors ◽

Experimental Results ◽

Entropy Analysis ◽

Artificial Data ◽

The Third

In this paper, we propose a new cross-sample entropy, namely the composite multiscale partial cross-sample entropy (CMPCSE), for quantifying the intrinsic similarity of two time series affected by common external factors. First, in order to test the validity of CMPCSE, we apply it to three sets of artificial data. Experimental results show that CMPCSE can accurately measure the intrinsic cross-sample entropy of two simultaneously recorded time series by removing the effects from the third time series. Then CMPCSE is employed to investigate the partial cross-sample entropy of Shanghai securities composite index (SSEC) and Shenzhen Stock Exchange Component Index (SZSE) by eliminating the effect of Hang Seng Index (HSI). Compared with the composite multiscale cross-sample entropy, the results obtained by CMPCSE show that SSEC and SZSE have stronger similarity. We believe that CMPCSE is an effective tool to study intrinsic similarity of two time series.

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Correlation in the heart rate data

Nonlinear Analysis Modelling and Control ◽

10.15388/na.1998.2.0.15301 ◽

1998 ◽

Vol 2 ◽

pp. 141-148

Author(s):

J. Ulbikas ◽

A. Čenys ◽

D. Žemaitytė ◽

G. Varoneckas

Keyword(s):

Nonlinear Dynamics ◽

Experimental Data ◽

Heart Rate ◽

Time Series ◽

Cardiovascular Function ◽

Statistical Properties ◽

Rate Data ◽

Heart Rate Data ◽

Dynamical Nature ◽

Analysis Of Time Series

Variety of methods of nonlinear dynamics have been used for possibility of an analysis of time series in experimental physiology. Dynamical nature of experimental data was checked using specific methods. Statistical properties of the heart rate have been investigated. Correlation between of cardiovascular function and statistical properties of both, heart rate and stroke volume, have been analyzed. Possibility to use a data from correlations in heart rate for monitoring of cardiovascular function was discussed.

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Assessment of anxiety disorders and related factors at the third trimester of pregnancy

Türkiye Aile Hekimliği Dergisi ◽

10.2399/tahd.09.132 ◽

2009 ◽

Vol 13 (3) ◽

pp. 132-136 ◽

Cited By ~ 4

Author(s):

İmran Tekgöz

Keyword(s):

Anxiety Disorders ◽

Third Trimester ◽

Related Factors ◽

The Third

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Correlations Between the Values of Maternal Glycemia from the Last Trimester of Pregnancy and Fetal Birth Weight

Romanian Journal of Diabetes Nutrition and Metabolic Diseases ◽

10.2478/rjdnmd-2013-0024 ◽

2013 ◽

Vol 20 (3) ◽

pp. 259-265

Author(s):

Monica Vereş ◽

Aurel Babeş ◽

Szidonia Lacziko

Keyword(s):

First Trimester ◽

Mean Value ◽

Fetal Macrosomia ◽

Entire Group ◽

Third Trimester ◽

The Third ◽

Group I ◽

Fetal Birth Weight ◽

First Trimester Of Pregnancy ◽

The Mean

Abstract Background and aims: Gestational diabetes represents a form of diabetes diagnosed during pregnancy that is not clearly overt diabetes. In the last trimester of gestation the growth of fetoplacental unit takes place, thus maternal hyperglycemia will determine an increased transplacental passage, hyperinsulinemia and fetal macrosomia. The aim of our study was that o analyzing the effect of maternal glycemia from the last trimester of pregnancy over fetal weight. Material and method: We run an observational study on a group of 46 pregnant women taken into evidence from the first trimester of pregnancy, separated in two groups according to blood glucose determined in the third trimester (before birth): group I normoglycemic and group II with hyperglycemia (>92mg/dl). Results: The mean value of third trimester glycemia for the entire group was of 87.13±22.03. The mean value of the glycemia determined in the third trimester of pregnancy was higher in the second group (109.17 mg/dl) in comparison to the first group (74.,21 mg/dl). The ROC curve for third trimester glycemia as fetal macrosomia appreciation test has an AUC of 0.517. Conclusions: Glycemia determined in the last trimester of pregnancy cannot be used alone as the predictive factor for fetal macrosomia.

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Features of the course and treatment of glaucoma during pregnancy

Clinical Medicine (Russian Journal) ◽

10.30629/0023-2149-2020-98-3-178-184 ◽

2020 ◽

Vol 98 (3) ◽

pp. 178-184

Author(s):

T. V. Chernyakova ◽

A. Yu. Brezhnev ◽

I. R. Gazizova ◽

A. V. Kuroyedov ◽

A. V. Seleznev

Keyword(s):

Pregnant Women ◽

Laser Treatment ◽

Progressive Disease ◽

Clinical Course ◽

The Other ◽

Third Trimester ◽

The Third ◽

Chronic Progressive Disease ◽

Hypotensive Therapy ◽

Eye Pressure

In the review we have integrated all up-to-date knowledge concerning clinical course and treatment of glaucoma among pregnant women to help specialists choose a proper policy of treatment for such a complicated group of patients. Glaucoma is a chronic progressive disease. It rarely occurs among childbearing aged women. Nevertheless the probability to manage pregnant patients having glaucoma has been recently increasing. The situation is complicated by the fact that there are no recommendations on how to treat glaucoma among pregnant women. As we know, eye pressure is progressively going down from the first to the third trimester, so we often have to correct hypotensive therapy. Besides, it is necessary to take into account the effect of applied medicines on mother health and evaluate possible teratogenic complications for a fetus. The only medicine against glaucoma which belongs to category B according to FDA classification is brimonidine. Medicines of the other groups should be prescribed with care. Laser treatment or surgery may also be a relevant decision when monitoring patients who are planning pregnancy or just bearing a child. Such treatment should be also accompanied by medicines.

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Changes in the systemic inflammatory response in women in the third trimester of pregnancy complicated by exacerbation of cytomegalovirus infection

Bulletin physiology and pathology of respiration ◽

10.36604/1998-5029-2020-77-56-62 ◽

2020 ◽

Vol 1 (77) ◽

pp. 56-62

Author(s):

I. N. Gorikov

Keyword(s):

Inflammatory Response ◽

Cytomegalovirus Infection ◽

Systemic Inflammatory Response ◽

Third Trimester ◽

The Third

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Experience of prenatal diagnosis of true knots of the umbilical cord during ultrasound examination in the third trimester of gestation

10.21516/2413-1458-2019-18-2-127-132 ◽

2019 ◽

Author(s):

M.Y. Morozova, V.V. Zotov, M.S. Kovalenko et all

Keyword(s):

Prenatal Diagnosis ◽

Umbilical Cord ◽

Ultrasound Examination ◽

Technological Advance ◽

Prenatal Ultrasound ◽

Ultrasound Diagnosis ◽

Review Of The Literature ◽

Third Trimester ◽

The Third

Despite the rapid technological advance, the expansion of prenatal ultrasound diagnosis, as well as the accumulation of experience by both domestic and foreign experts, prenatal recognition of true knots of the umbilical cord causes significant difficulties. Three cases of successful ultrasound diagnosis of true knots of the umbilical cord and brief review of the literature are presented.

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A case of diagnosis of a giant fetal cervical teratoma

10.21516/2413-1458-2018-17-1-68-71 ◽

2018 ◽

Author(s):

S.V. Idimesheva, E.G. Bazhenova, V.A. Vedernikov

Keyword(s):

Magnetic Resonance Imaging ◽

Ultrasound Examination ◽

Mature Teratoma ◽

Tumor Resection ◽

Histopathological Diagnosis ◽

Resonance Imaging ◽

Cervical Tumor ◽

Third Trimester ◽

The Third ◽

Cervical Teratoma

А case of ultrasound diagnosis of the giant fetal cervical tumor in the third trimester of gestation is presented. The diagnosis of a cervical teratoma was supposed by ultrasound examination and magnetic resonance imaging. The tumor resection was successfully performed at 6 days of life. Histopathological diagnosis was mature teratoma.

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Comparative assessment of informational content of the equations of F.P. Hadlock and the computer program of V.N. Demidov in determination of term of gestation and fetal weight in the III trimester of gestation

10.21516/2413-1458-2017-16-2-145-150 ◽

2017 ◽

Author(s):

E.A. Derkach , O.I. Guseva

Keyword(s):

Computer Program ◽

High Precision ◽

Gestational Age ◽

Computer Programs ◽

Comparative Assessment ◽

Fetal Weight ◽

Informational Content ◽

Third Trimester ◽

The Third

Objectives: to compare the accuracy of equations F.P. Hadlock and computer programs by V.N. Demidov in determining gestational age and fetal weight in the third trimester of gestation. Materials: 328 patients in terms 36–42 weeks of gestation are examined. Ultrasonography was performed in 0–5 days prior to childbirth. Results: it is established that the average mistake in determination of term of pregnancy when using the equation of F.P. Hadlock made 12,5 days, the computer program of V.N. Demidov – 4,4 days (distinction 2,8 times). The mistake within 4 days, when using the equation of F.P. Hadlock has met on average in 23,1 % of observations, the computer program of V.N. Demidov — 65,9 % (difference in 2,9 times). The mistake more than 10 days, took place respectively in 51,7 and 8,2 % (distinction by 6,3 times). At a comparative assessment of size of a mistake in determination of fetal mass it is established that when using the equation of F.P. Hadlock it has averaged 281,0 g, at application of the computer program of V.N. Demidov — 182,5 g (distinction of 54 %). The small mistake in the mass of a fetus which isn't exceeding 200 g at application of the equation of F.P. Hadlock has met in 48,1 % of cases and the computer program of V.N. Demidov — 64,0 % (distinction of 33,1 %). The mistake exceeding 500 g has been stated in 18 % (F.P. Hadlock) and 4,3 % (V.N. Demidov) respectively (distinction 4,2 times). Conclusions: the computer program of V.N. Demidov has high precision in determination of term of a gestation and mass of a fetus in the III pregnancy.

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