Search results for "Gestational age"

showing 6 items of 266 documents

Factors Predisposing to Hypertension in Subjects Formerly Born Preterm: Renal Impairment, Arterial Stiffness, Endothelial Dysfunction or 
Something E…

2020

: Subjects formerly born preterm subsequently develop arterial - particularly isolated systolic- hypertension more frequently than their peers born at term. : Numerous factors may influence this predisposition, including an incomplete nephrogenesis, implying the presence of kidneys with a reduced number of nephrons and consequent reduction in haematic filtration, increased sodium absorption and activation of renin-angiotensin-aldosterone system, increased arterial rigidity produced by an elastin deficiency previously observed in anatomic specimens of human immature aorta, and reduced endothelial nitric oxide excretion, due to high blood levels of ADMA, a strong direct inhibitor of nitric o…

medicine.medical_specialtyhypertensionIntrauterine growth restrictionGestational Age030204 cardiovascular system & hematologyKidneyRisk AssessmentArticleNitric oxideExcretion03 medical and health scienceschemistry.chemical_compound0302 clinical medicineVascular StiffnessRisk FactorsInternal medicinemedicine.arteryInternal MedicineMedicineHumans030212 general & internal medicinelow birth weightEndothelial dysfunctionAortaFetal Growth Retardationbiologybusiness.industryInfant Newbornpreterm birthblood pressureperinatal programmingmedicine.diseaseEndocrinologyBlood pressurechemistryArterial stiffnessbiology.proteinEndothelium VascularbusinessPrematurityElastinInfant PrematureCurrent Hypertension Reviews
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Dilation of the ductus venosus by stent implantation increases placental blood perfusion in fetal sheep.

2006

The reduction of resistance to flow in the ductus venous (DV) and a decrease of blood supply to the liver serve for the survival of the fetus during hypoxia. The present study investigated the influence of the increased diameter of the DV on placental blood perfusion.In 15 ewes with twin pregnancies at gestational ages of 117 +/- 4 days, a stent (4 or 5 mm) was placed into the DV of 1 twin (DV(stent) group) under ultrasound guidance. Blood flow rates in the umbilical vein (UV) and DV of both fetuses were measured using Doppler ultrasound. Eight pairs of twin fetuses were included for the final analysis.The dilatation of the DV increased the blood flow volume rate passed through the DV from …

medicine.medical_specialtymedicine.medical_treatmentPulsatile flowGestational AgeHepatic VeinsFetal HypoxiaSensitivity and SpecificityUmbilical veinRandom AllocationPregnancyInternal medicinemedicineAnimalsPlacental CirculationProbabilityFetusSheepbusiness.industryFetoscopyObstetrics and GynecologyStentBlood flowSurgeryDisease Models Animalmedicine.anatomical_structureLiverUltrasonography Doppler PulsedPulsatile FlowCardiologyVascular resistancePregnancy AnimalFemaleStentsVascular ResistancebusinessPerfusionDuctus venosusAmerican journal of obstetrics and gynecology
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Spontaneous labour at term is associated with fetal monocyte activation.

1999

SUMMARYThe aetiology of both term and preterm labour remains incompletely understood. Maternal infectious diseases as well as intra-uterine infections were shown to be a well established cause of uncontrollable preterm delivery, indicating that inflammatory reactions, regulated by maternal immunecompetent cells, are implicated in labour-promoting mechanisms. To investigate the possibility that the activation of the fetal immune system may be involved in labour induction, we examined cytokine production patterns of different cord blood cell populations obtained from neonates after spontaneous onset of normal term labour and vaginal delivery (n = 25), vaginal delivery but induced term labour …

medicine.medical_treatmentT cellImmunologyInflammationGestational AgeBetamethasoneMonocytesMagnesium SulfateImmune systemFetusObstetric Labor PrematurePregnancymedicineImmunology and AllergyHumansLabor InducedLungreproductive and urinary physiologyFenoterolFetusLabor Obstetricbusiness.industryVaginal deliveryCesarean SectionInterleukin-6MonocyteInfant NewbornDelivery ObstetricFetal Bloodmedicine.anatomical_structureCytokineTocolytic AgentsCord bloodImmunologyFemaleOriginal Articlemedicine.symptombusinessClinical and experimental immunology
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Bloodstream Infection Incidence of Different Central Venous Catheters in Neonates: A Descriptive Cohort Study

2017

Central venous catheters (CVCs) in neonates are associated with a risk of central line-associated bloodstream infections (CLABSI). Most reports on the incidence of CLABSI in neonates focus on umbilical venous catheters (UVCs) and peripherally inserted central catheters (PICCs). We evaluated the incidence and risk factors for CLABSI in a cohort of neonates with femoral venous catheters (FVCs), UVCs, and PICCs, with a gestational age ≥34 weeks born between January 1, 2006 and June 30, 2013. We included 2,986 neonates with a total of 656 catheters. The CLABSI incidence rate varied from 12.3 per 1,000 catheter-days in FVCs to 10.6 per 1,000 catheter-days in UVCs and 5.3 per 1,000 catheter-days …

peripherally inserted central catheterBirth weightumbilical catheterPeripherally inserted central catheterPediatricscentral venous catheterization03 medical and health sciences0302 clinical medicine030225 pediatricsMedicine030212 general & internal medicineOriginal Researchbusiness.industryfemoral venous catheterIncidence (epidemiology)Hazard ratiolcsh:RJ1-570Gestational agelcsh:PediatricsinfantCatheterAnesthesiaPediatrics Perinatology and Child HealthCohortbusinesscentral line-associated bloodstream infectionCohort studyFrontiers in Pediatrics
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Expired Tidal Volume and Respiratory Rate During Postnatal Stabilization of Newborn Infants Born at Term via Cesarean Delivery

2021

Objective To retrieve evolving respiratory measures in the first minutes after birth in normal neonates born at term using a respiratory function monitor. Study design We evaluated newborn babies delivered at term via cesarean after uncomplicated pregnancies. Immediately after birth, a respiratory function monitor with an adapted flowmeter and a face mask were applied at 2, 5, and 10 minutes after birth for 90 seconds in each period. We analyzed expired and inspired tidal volume, respiratory rate (RR), percentage of leakage, and number of analyzed breaths in each individual infant's recording using a respiratory research software. Results A total of 243 infants completed the study. The fina…

respiratory function monitorPercentileRespiratory ratebusiness.industrytidal volumeGestational ageReference rangerespiratory ratePediatricsRJ1-570Term (time)mask leakagenewbornAnesthesiaPediatrics Perinatology and Child HealthMedicineRespiratory functionRespiratory systemCesarean deliverybusinessThe Journal of Pediatrics: X
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Personal and Environmental Risk Factors at Birth and Hospital Admission: Direct and Vitamin D-Mediated Effects on Bronchiolitis Hospitalization

2021

Abstract: Seasonal variations in UV-B radiation may influence vitamin D status, and this, in turn, may influence the risk of bronchiolitis hospitalization. The aim of this study was using a causal inference approach to investigate, simultaneously, the interrelationships between personal and environmental risk factors at birth/hospital admission (RFBH), serum vitamin D levels and bronchiolitis hospitalization. A total of 63 children (<2 years old) hospitalized for bronchiolitis (34 RSV-positive) and 63 controls were consecutively enrolled (2014-2016). Vitamin D levels and some RFBH (birth season, birth weight, gestational age, gender, age, weight, hospitalization season) were recorded. The d…

seasonality: bronchiolitis hospitalizationvitamin Dgestational agemediation analysis
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