Study of ionic calcium in maternal and cord blood and baby′s blood at 48-h age

Deshpande, Neelam; Patil, Lalit; Deshpande, Shantanu; Chavan, Sanjay

doi:10.4103/0975-2870.126321

Cited by 6 publications

(9 citation statements)

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“…Nearly half of the corrected calcium levels in our study were in the hypercalcaemic range and nearly all of them were venous samples in the first 24 h after birth. Although neonates have higher calcium levels at birth and cord blood calcium levels correlate well with maternal calcium levels [50], the calcium levels drop after birth over the first 12-48 h in neonates [51]. We postulate that the reason for the very high number of hypercalcaemic values may be due to the low upper limit of the reference interval used in the laboratory for venous samples collected in first 24 h [23].…”

Section: Discussionmentioning

confidence: 99%

Screening of vitamin D and calcium concentrations in neonates of mothers at high risk of vitamin D deficiency

2020

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Objective: The aim of this study was to determine, retrospectively, the serum 25OHD and calcium concentrations of screened neonates of mothers at high risk of 25OHD deficiency and examine whether their measurement contributes to the management of these neonates. Methods: Serum 25OHD and calcium concentrations from 600 samples of umbilical cord blood or venous blood collected from neonates over a 12-month period were analysed. Results: There was a high prevalence of vitamin D insufficiency (27.6%, 30-50 nmol/L) and deficiency (21.3%, < 30 nmol/L) in neonates from high-risk maternal groups. There was a statistically positive but weak correlation (ρ = 0.22, P < 0.0001) between 25OHD and serum calcium. Only 7 neonates out of 569 (1.2%) had calcium concentrations in the hypocalcaemic range; however, a significant number (47.6%) were reported to be in the hypercalcaemic range. Nearly all of these were venous samples collected in first 24 h after birth. Conclusion:Vitamin D deficiency is prevalent in neonates of high-risk mothers but the risk of hypocalcaemia due to vitamin D deficiency at birth is low. Screening neonates entails blood testing which can cause distress to neonates and their parents, substantial imposition on staff and financial burden on the health care system. Vitamin D supplementation of these neonates from birth without routine screening appears more reasonable. Also, the data from this study suggest that the paediatric reference range for corrected calcium concentrations in neonates should be re-evaluated.

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Section: Discussionmentioning

confidence: 99%

Screening of vitamin D and calcium concentrations in neonates of mothers at high risk of vitamin D deficiency

2020

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“…Dependiendo de la aplicación y de las fuentes de energía, en el diseño de antenas para fines de recolección de energía de RF existen algunas de buena ganancia que a menudo tienen un diseño voluminoso usado para frecuencias más bajas, sin embargo, esto genera pérdidas de transmisión y recepción debido al acoplamiento entre la antena y el circuito rectificador [14]. Es de importancia cosechar la energía de RF de un amplio rango de bandas para hacer uso de todo el espectro que sea posible, esto se puede lograr usando antenas de banda ancha [15].…”

Section: Introductionunclassified

Simulación de una antena microcinta rectangular espiral multibanda para la aplicación de captación de energía de radiofrecuencia

Ochoa

López-Giraldo

Goéz

2021

TecnoL.

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El presente estudio realizó un análisis de la influencia que ejercen las variaciones del grosor del sustrato dieléctrico y de la posición de las ranuras de microcinta creadas en el parche radiante de una antena de microcinta. El trabajo presentó la simulación mediante el software de optimización automática CST Studio, de una antena para captura de energía de radiofrecuencia empleando el substrato ARLON AD450 con constante dieléctrica de 4.5, pérdidas tangenciales de 0.035 y espesor de 3 mm. En este diseño se aplicaron varias ranuras hasta formar una espira cuadrada. Los resultados obtenidos evidenciaron que al aumentar el espesor del sustrato que separa el plano de tierra del parche radiante, se produce una disminución en las pérdidas de retorno del parámetro y al mismo tiempo se da un aumento en la ganancia de la antena. La creación de ranuras, el grosor y la ubicación de estas en el parche radiante producen un desplazamiento en la frecuencia de resonancia. Asimismo, el arreglo presentado permite frecuencias de resonancia alrededor de 1.6 GHz, 2.38 GHz, 3.38 GHz y 4.16 GHz, con una ganancia entre 2.48 dB y 7.66 dB. Este diseño de antena permitió mejoras en ganancia y en el patrón de radiación. La creación de ranuras en el parche radiante modificó la distribución de corriente de superficie de la antena y generó nuevas frecuencias de resonancia. Los espacios de aire creados entre el cobre y el substrato mejoraron el rendimiento de la antena, del mismo modo que el espacio ejercido por el substrato entre el plano de tierra y el parche radiante disminuyeron las pérdidas de ganancia en la antena debido a la reducción del cobre cuando se realizan estas ranuras. La antena propuesta presenta un comportamiento multibanda inmediatamente se agregan ranuras en el parche. La evaluación de substratos y estructuras son útiles para el desarrollo de antenas de microcinta integradas para sistemas de recolección de energía de radiofrecuencia.

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“…It is involved in the action of other intracellular messenger, such as cyclic adenosine mono phosphate and inositol 1, 4, 5-triphosphate and thus mediates the cellular response to numerous hormones. 5 It takes part in nerve transmission. Magnesium, calcium and sodium dearrangements are a frequent finding in asphyxiated infants and these abnormalities are significantly associated with poor outcome.…”

Section: Introductionmentioning

confidence: 99%

“…Magnesium, calcium and sodium dearrangements are a frequent finding in asphyxiated infants and these abnormalities are significantly associated with poor outcome. 5 Calcium and phosphorus are the major component of bones and cartilages. 5 Magnesium is essential for the synthesis of fatty acids and proteins and it is critical in metabolic processes that require energy derived from ATP (adenosine tri phosphate).…”

Section: Introductionmentioning

confidence: 99%

“…5 Calcium and phosphorus are the major component of bones and cartilages. 5 Magnesium is essential for the synthesis of fatty acids and proteins and it is critical in metabolic processes that require energy derived from ATP (adenosine tri phosphate). 6,7 Data on mineral values are very less hence the study was planned to estimate some minerals in cord blood of neonates.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of some minerals in cord blood from tribal and nontribal population of Udaipur region

Jain

Gupta

2016

Int J Res Med Sci

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Study of ionic calcium in maternal and cord blood and baby′s blood at 48-h age

Cited by 6 publications

References 0 publications

Screening of vitamin D and calcium concentrations in neonates of mothers at high risk of vitamin D deficiency

Screening of vitamin D and calcium concentrations in neonates of mothers at high risk of vitamin D deficiency

Simulación de una antena microcinta rectangular espiral multibanda para la aplicación de captación de energía de radiofrecuencia

Evaluation of some minerals in cord blood from tribal and nontribal population of Udaipur region

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