FETAL QRS-COMPLEXES DETECTECTIONS IN ABDOMINAL SIGNAL BY USING WAVELET-BISPECTRUM

Fetal hypoxia or distress is a physical stress experienced by a fetus due to a lack of oxygen. Intrauterine hypoxia and the resultant perinatal brain damages may lead to extraordinary effects, including continuous lifelong treatments. One of the ways for detecting symptoms of hypoxia is monitoring of the fetus heart activity. At present, the basic method of monitoring the condition of unborn baby is the ultrasound cardiotocography (CTG). Considerably more information for early detection of the fetal hypoxia may be obtained by analyzing fetal electrocardiogram (FECG).

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Adoption of Color Doppler Ultrasound in the Measurement of Fetal Hypoxia in Late Pregnancy

Journal of Medical Imaging and Health Informatics ◽

10.1166/jmihi.2021.3321 ◽

2021 ◽

Vol 11 (2) ◽

pp. 563-567

Author(s):

Wenying Wu ◽

Li Zhao ◽

Peiming Feng ◽

Xiaoyan Wang ◽

Minghui Nie

Keyword(s):

Blood Flow ◽

Amniotic Fluid ◽

Pregnant Women ◽

Color Doppler ◽

Color Doppler Ultrasound ◽

Control Group ◽

Fetal Hypoxia ◽

Neonatal Asphyxia ◽

Intrauterine Hypoxia ◽

Peak Blood

Objective: In order to improve the detection rate of fetal hypoxia in the third trimester and reduce the probability of adverse pregnancy outcome, color doppler ultrasound (CDU), and contractions were used to assess the severity of fetal hypoxia. Methods: The 61 pregnant women diagnosed with intrauterine hypoxia in South District of The Affiliated Hospital of Chengde Medical College from October 2017 to September 2019 were classified as the sick group. Meanwhile, the 61 normal pregnant women were selected as the control group. CDU was used to detect the relevant indexes of umbilical artery (UA) and middle cerebral artery (MCA) in the two groups, including pulse index (PI), resistance index (RI), systolic peak blood flow velocity (S) and diastolic peak blood flow velocity (D). The Apgar scale was used to score neonatal status. According to the score results, newborns were divided into Apgar ≤ 7 group and Apgar > 7 group. The indexes of UA and MCA were compared between the two groups. The amniotic fluid status of pregnant women was assessed using the contractile stimulation test (CST). The rate of amniotic fluid pollution in pregnant women and the incidence of neonatal asphyxia were calculated. Pregnant women were grouped according to the CST score. The correlation between CST score and amniotic fluid pollution and neonatal asphyxia in pregnant women was analyzed. Results: First, the index of fetal UA was obviously higher than that of the control group, while the index of MCA was obviously lower than that of the control group (P < 0.05). Second, the indexes of fetal UA in Apgar ≤ 7 group were obviously higher than those in Apgar > 7 group, while those in MCA were obviously lower than those in Apgar > 7 group (P < 0.05). Third, the incidence of amniotic fluid pollution and neonatal asphyxia in low and middle groups of pregnant women was obviously higher than that in high groups (P < 0.01). Conclusion: This indicates that the CDU technology combined with uterine contraction stimulation experiment can assess the degree of intrauterine hypoxia in the late stage of pregnancy, which provides a feasible scheme for clinical detection of intrauterine hypoxia.

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EPIDEMIOLOGICAL OF PERINATAL MORTALITY IN OMSK REGION

Epidemiology and Infectious Diseases (Russian Journal) ◽

10.17816/eid40782 ◽

2013 ◽

Vol 18 (5) ◽

pp. 38-42

Author(s):

T. I Dolgikh ◽

S. V Barinov ◽

T. V Kadtsyna ◽

G. V Chekmarev

Keyword(s):

Perinatal Mortality ◽

Birth Asphyxia ◽

Perinatal Period ◽

Demographic Characteristics ◽

Fetal Hypoxia ◽

Epidemiological Analysis ◽

High Incidence ◽

Intrauterine Hypoxia ◽

High Level ◽

The City

An epidemiological analysis of basic indices in obstetric aid in the Omsk region in comparison to nationwide data for 2007 to 2011 has been performed. There was identified unfavourable situation of reproductive and demographic characteristics - high incidence of extragenital morbidity in women, increasing the proportion of antenatal losses among as both term as preterm infants also, the prevalence of perinatal mortality in maternity institutions in districts, if compared with similar institutions in the city. There were determined main causes of stillbirth: certain conditions emerging in the perinatal period and intrauterine hypoxia, birth asphyxia. Low indices of neonatal health: a high level of prematurity, a number of infants with developmental retardation, and fetal hypoxia have been ascertained. The directions for improvement of the work of perinatal services in Russia have been suggested.

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Integrated 2D Doppler indices of uteroplacental and fetal blood flow in diagnosis of intrauterine hypoxia

RUDN Journal of Medicine ◽

10.22363/2313-0245-2021-25-4-290-297 ◽

2021 ◽

Vol 25 (4) ◽

pp. 290-297

Author(s):

Natallia V. Matskevich ◽

Marina P. Famina

Keyword(s):

Blood Flow ◽

Prognostic Significance ◽

Perinatal Outcomes ◽

Control Group ◽

Fetal Blood ◽

Fetal Hypoxia ◽

Term Infants ◽

Intrauterine Hypoxia ◽

Doppler Indices ◽

Fetal Vessels

Relevance . Intrauterine hypoxia associated with placental disorders is a significant factor of ante-, intra- and postnatal fetal and newborn death. Despite clinical examination of pregnant women using ultrasound and cardiotocography, cases of intrauterine hypoxia often remain undetected prenatally. Clinical manifestation of placental disorders and intrauterine hypoxia are associated with pathological changes of blood flow resistance in the uterine, placental and fetal vessels. A combined Doppler assessment of blood flow in the uterine, placental and fetal vessels could improve detection of intrauterine hypoxia. The aim of the study was to assess the prognostic significance of integrated 2D Doppler indices of uteroplacental and fetal blood flow for the detection of fetal hypoxia in the 3rd trimester and to predict unfavorable perinatal outcomes. Materials and Methods. The outcomes of pregnancy of 48 women with fetal hypoxia delivered at 29 - 40 gestational weeks (study group), and 21 women who gave birth to healthy full-term infants (control group) were retrospectively analyzed. On the eve of delivery all women had 2D Doppler assessment of the uterine arteries, umbilical arteries, and fetal middle cerebral artery with an assessment of the cerebro-placental ratio, umbilical-cerebral ratio and cerebro-placental-uterine ratio. Results and Discussion . Analysis of the obtained values of cerebro-placental-uterine ratio, cerebro-placental ratio and umbilical-cerebral ratio showed the benefit from use of integrated 2D Doppler indices in the diagnosis of fetal hypoxia at 29 - 40 gestations weeks and in predicting complications in newborns. The high sensitivity of the cerebro-placental-uterine ratio (90.5%) makes it possible to effectively use this index for the diagnosis of intrauterine hypoxia. Conclusion. Pathological cerebro-placental-uterine ratio 2.44 is a clinically significant 2D Doppler criterion that predicts a high risk of asphyxia, respiratory distress syndrome, hypotrophy, and perinatal hypoxic-ischemic encephalopathy. Lower values of the cerebro-placental ratio and umbilical-cerebral ratio sensitivity (77.1% and 81.3%, respectively) limit their use for the diagnosis of fetal hypoxia as compared with cerebro-placental-uterine ratio.

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Nucleated Erythrocytes and Intraventricular Hemorrhage in Preterm Neonates

PEDIATRICS ◽

10.1542/peds.96.3.475 ◽

1995 ◽

Vol 96 (3) ◽

pp. 475-478

Author(s):

David W. Green, ◽

Barbara Hendon ◽

Francis B. Mimouni

Keyword(s):

Intracranial Hemorrhage ◽

Preterm Neonates ◽

Control Group ◽

Fetal Hypoxia ◽

Potential Marker ◽

Intrauterine Hypoxia ◽

Appropriate For Gestational Age ◽

Multiple Variables ◽

Not At Risk ◽

Preterm Newborns

Objectives. Increased circulating nucleated erythrocytes (NRBCs) in the newborn period can be markers of chronic fetal hypoxia, which in turn may be a risk factor for intracranial hemorrhage (IVH). To evaluate the relation between chronic intrauterine hypoxia and IVH, we compared the courses of the absolute NRBC (ANRBC) count in preterm newborns with and without intracranial hemorrhage. Methods. We measured ANRBC counts in the first 6 days of life in appropriate for gestational age newborns at 32 weeks' gestation or earlier with (n = 46) and without (n = 103) IVH, who were not at risk for altered erythropoiesis. Results. The ANRBC counts at birth were higher in infants who developed severe IVH than in control infants without IVH (P < .03). The ANRBC counts peaked on day 2 or 3 in newborns with IVH, but declined continuously from a peak on day 1 in the control group. Stepwise regression analysis of multiple variables revealed that the grade of IVH had the greatest impact on ANRBC counts. An ANRBC count of at least 2.0 x 109/L on day 1 of life had a sensitivity of 63% and a specificity of 79% in predicting grade III or IV IVH. Conclusion. An elevated or increasing ANRBC count in a preterm newborn is a potential marker for an impending or present severe IVH, respectively, and may reflect a state of altered prenatal or postnatal erythropoiesis.

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Cumulative changes in the fetal electrocardiogram and biochemical indices of fetal hypoxia

European Journal of Obstetrics & Gynecology and Reproductive Biology ◽

10.1016/0028-2243(94)90210-0 ◽

1994 ◽

Vol 55 (1) ◽

pp. 63-70 ◽

Cited By ~ 21

Author(s):

Michele P. Mohajer ◽

Daljit S. Sahota ◽

Nicholas N. Reed ◽

Allan Chang ◽

E.Malcolm Symonds ◽

...

Keyword(s):

Fetal Hypoxia ◽

Fetal Electrocardiogram ◽

Biochemical Indices

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Effects of Physical Training on Stuttering

Journal of Speech and Hearing Research ◽

10.1044/jshr.1104.767 ◽

1968 ◽

Vol 11 (4) ◽

pp. 767-776 ◽

Cited By ~ 2

Author(s):

B. Don Franks ◽

Elizabeth B. Franks

Keyword(s):

College Students ◽

Group Therapy ◽

Physical Training ◽

Cardiovascular Response ◽

Training Group ◽

Physical Stress ◽

Submaximal Exercise ◽

Endurance Running ◽

Response To Exercise

Eight college students enrolled in group therapy for stuttering were divided into two equal groups for 20 weeks. The training group supplemented therapy with endurance running and calisthenics three days per week. The subjects were tested prior to and at the conclusion of the training on a battery of stuttering tests and cardiovascular measures taken at rest, after stuttering, and after submaximal exercise. There were no significant differences (0.05 level) prior to training. At the conclusion of training, the training group was significandy better in cardiovascular response to exercise and stuttering. Although physical training did not significantly aid the reduction of stuttering as measured in this study, training did cause an increased ability to adapt physiologically to physical stress and to the stress of stuttering.

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