Fetal scalp blood sampling

Urang, Sally; Davis, Lorna; Elsberry, Charlotte (Pixie) Cram; Kozlowski, Mary Kay

doi:10.1016/0091-2182(93)90102-m

Cited by 2 publications

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“…The cut-off values for these parameters are the following: (a) For pCO 2 , it varies as a function of labor stage: in early stage of the labor, the partial pressure is between 43–57 mmHg, while for the active phase with full dilatation it ranges from 36–60 mmHg [ 40 ]. Respiratory acidosis is installed at pCO 2 ≥ 75 mmHg [ 5 ]; (b) base deficit: in early labor, the normal values are between 0.2–0.4 mEq/L, rising to 2–3.3 mEq/L in active labor with full dilatation [ 41 ]. In the case of severe metabolic acidosis, the level of the bicarbonate rises above 12mmol/L [ 5 ]; (c) lactate levels increase in severe metabolic acidosis above 10 mmol/L and an indication for cesarean delivery comes for lactate levels above 4.8 mmol/L [ 5 ]; (d) hemoglobin values below 40 g/L could indicate the presence of certain fetal conditions (e.g., rhesus disease anemia, infections, α-thalassemia or hemorrhages) [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

Current Innovative Methods of Fetal pH Monitoring—A Brief Review

Bohîlțea

Mihai²,

Ducu³

et al. 2022

Diagnostics

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In this study, we explore the “why?”, and “how?”, monitoring the pH of the fetal scalp is used, and show its limitations. In addition, we review the development of new devices based on the modern physics and nanomaterials serving this topic. Most of the works we found in our search have focused on improving the prognostic of fetal heart rate monitoring, because it is the “golden standard” in determining fetal distress. Although the best-known screening method, it can only provide limited information about the actual status of the fetus. The best predictive assessment, with the highest reproducibility, states that a normal fetal heart rate is indicative of a healthy baby. However, its excellent sensitivity is much reduced when identifying the actual “distress”. This is when second-line monitoring methods come into play to guide the diagnostics and direct the obstetrician towards an action plan. Although a historic method, fetal scalp pH sampling is still under review as to its efficiency and place in the current obstetrics. Continuous surveillance of the fetal parameters is important, especially for the fetuses undergoing intrauterine growth restricted (IUGR). Since fetal scalp blood sampling is still under research and is a randomized controlled trial, which compares the relevance of pH and lactates to the obstetrical situation, the maternal-fetal medicine could greatly benefit from the introduction of engineered nanomedicines to the field.

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Section: Resultsmentioning

confidence: 99%

Current Innovative Methods of Fetal pH Monitoring—A Brief Review

Bohîlțea

Mihai²,

Ducu³

et al. 2022

Diagnostics

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Single Channel Magnetic Induction Spectroscopy Technique for Fetal Acidosis Detection

et al. 2016

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Current fetal acidosis diagnosis needs an invasive measurement which required a doctor to puncture fetal scalp to acquire blood pH. This method introduced risk to the fetal which fetal scalp may bruise and infected. This paper discusses a noninvasive method employing a single channel magnetic induction spectroscopy technique as an alternative method to diagnose acidosis in fetal without puncturing the fetal scalp. The studies are based on numerical simulation models to investigate the most feasible sensor coil that is sensitive and effective to be implemented in hardware setup as the shape of coil influences directly the sensing performance of the magnetic induction spectroscopy system. The study has found that the circular coil is more sensitive than linear coil. The system tested with different pH samples to mimic the blood pH value. The result is very promising with good correlation approaching 1 has been achieved. Therefore, magnetic induction spectroscopy technique has good opportunity to be applied as an alternative method to detect acidosis in the fetal with circular coil is performed as the best sensing coils for MIS hardware.

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Fetal scalp blood sampling

Cited by 2 publications

References 0 publications

Current Innovative Methods of Fetal pH Monitoring—A Brief Review

Current Innovative Methods of Fetal pH Monitoring—A Brief Review

Single Channel Magnetic Induction Spectroscopy Technique for Fetal Acidosis Detection

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