OBSERVATIONS ON HEART RATE AND pH IN THE HUMAN FETUS DURING LABOR

Kubli, F.; Hon, Edward H.; Khazin, Aida F.; Takemura, Hiromasa

doi:10.1097/00006254-197002000-00003

Cited by 51 publications

(66 citation statements)

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“…Scalp pH values above 7.25 are considered normal, values between 7.20 and 7.25 signify preacidosis, and those below 7.20 represent acidosis. 3 In patients with normal FHR patterns during 20 minutes preceding a blood sampling, the frequency of pH values above 7.25 was 94%. When heart rate accelerations were present, a sign of fetal well-being, all scalp pH values were above 7.25.…”

Section: Introductionmentioning

confidence: 95%

Correlation of intra partum electronic fetal monitoring with neonatal outcome

Sunitha

Rao

Prajwal

et al. 2017

Int J Reprod Contracept Obstet Gynecol

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Background: The importance of fetal monitoring during labour has been realized since long. The stress of uterine contractions may affect the fetus adversely especially if the fetus is already compromised, when the placental reserves are suboptimal, or when cord undergoes compression as in those associated with diminished liquor amnii or iatrogenic uterine hyperstimulation due to injudicious use of oxytocin. Even a fetus which is apparently normal in the antenatal period may develop distress during labour. Hence fetal monitoring during antepartum and intrapartum periods is of vital importance for timely detection of fetal distress so that appropriate management may be offered. Methods: This study was a prospective observational study included 100 patients of more than 34 weeks period of gestation were divided into two groups. Patients in labour were analyzed on an Electronic Monitor. Delivery conducted was either by vaginal route, instrumental or by caesarean section depending upon the fetal heart rate tracings and their interpretations as per the case. At the time of delivery umbilical cord blood was taken for the pH analysis. All new born babies were seen by the paediatrician immediately after the delivery and 1 and 5 minute APGAR score assessed for the delivered baby. The various EFM Patterns obtained were compared with the neonatal status at birth using the parameters already mentioned. The false positives and false negatives if any were tabulated. Data so obtained was analyzed statistically thereafter. Statistical Package for Social Sciences (SPSS) Version 13.0 was used for the purpose of analysis. Results: Results revealed that among the 50 subjects of the case group, 7 subjects showed the absence of the beat to beat variability, 12 subjects showed early deceleration, 32 subjects showed late deceleration, and 6 subjects showed the presence of variable deceleration. No significant association of beat to beat variability, early and variable deceleration could be established with meconium staining/NICU admissions/low APGAR. A significant positive association between persistent late deceleration with MSL, APGAR <7 at 1 min, and Instrumental/LSCS delivery was seen. A significant positive association between any CTG abnormality and APGAR at 1 min, type of delivery, and meconium staining was seen. Conclusions: EFM should be used judiciously. Cardiotocography machines are certainly required in the labour room. Equally important is the proper interpretation of the CTG tracings so that unjustified caesarean sections can be minimized, at the same time picking up cases of fetal distress in time which is likely to improve fetal outcome.

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Section: Introductionmentioning

confidence: 95%

Correlation of intra partum electronic fetal monitoring with neonatal outcome

Sunitha

Rao

Prajwal

et al. 2017

Int J Reprod Contracept Obstet Gynecol

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“…Clinical advantages of HRV were accepted in 1965 after the observation made by Hon and Lee in their studies of intrauterine damages. They noticed that bad disturbances of fetal heart rate were preceded by changes in the HR structure [9][10][11][12][13]. HRV assimilation in cardiologic diagnostics was complicated because of the need for standards of measurement, physiological interpretation and clinical procedures.…”

Section: Introductionmentioning

confidence: 99%

Heart rate variability analysis: physiological foundations and main methods

Baevsky¹,

Chernikova²

2017

Cardiometry

130

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The article presents the main provisions of the methodology for the analysis of heart rate variability (HRV), which is now actively and widely implemented in many fields of medicine and applied physiology. This methodology was first developed in space medicine, where, already during the first manned spaceflights, there was a need in operative assessment of the person's reactions and abilities to maintain high performance and good level of health under different stress conditions.The HRV analysis methodology is based on the measurement of a consecutive series of cardiac cycle durations, for which electrocardiography, rheocardiography, ballistic cardiography, etc., can be used. The resulting numerical series are subjected to mathematical analysis using statistical, spectral and other methods. The results are interpreted as medical and physiological criteria of the functional state of the organism.Based on the mathematical model, a probabilistic approach to the prediction of pathological conditions was proposed. Indicators of the stress degree of regulatory systems and their functional reserve, which are calculated from the HRV analysis data, are used in the mathematical model of the functional states. In order to obtain the decision rules for the recognition of identified classes of functional states the stepwise discriminant analysis has been applied.Equations of the discriminant function were obtained. This article examines in detail this new probabilistic approach to the HRV analysis and provides examples of its use for assessing the functional state of cosmonauts at various stages of long space flights.

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“…In other words, a normal CTG is reassuring regarding the state of fetal oxygenation as hypoxia/acidosis is generally restricted to cases with suspicious or pathological patterns (see the definitions given in the CTG chapter [1]). However, a large number of fetuses with the latter patterns will not have clinically important hypoxia/acidosis [2,3]. To reduce such false positive cases and unnecessary medical interventions, adjunctive technologies have been proposed to further assess fetal oxygenation.…”

Section: Introductionmentioning

confidence: 99%