Dietary Salt During Pregnancy and Maternal Vascular Function
Influence of Dietary Salt Intake During Pregnancy on Maternal Systemic and Uteroplacental Vascular Function
Studieoversigt
Status
Status
Betingelser
Betingelser
Detaljeret beskrivelse
During the study pregnant women at the third trimester of pregnancy (37-38 weeks of pregnancy) will have one study visit during which following procedures will be done:
- measurement of maternal systemic microvascular function by Laser Doppler flowmetry (post-occlusive reactive hyperemia, iontophoresis of acetylcholine and sodium nitroprusside)
- measurement of maternal systemic macrovascular function by vascular ultrasound measurement of brachial artery flow mediated dilation (FMD)
- measurement of maternal uteroplacental function by ultrasound color Doppler measurement of umbilical artery and fetal middle cerebral artery blood flow
- venous blood sampling; serum will be stored for measurement of oxidative stress, matrix metalloproteinase 9 and endocan level
- 24-hour urine natriuresis (to estimate daily salt intake)
- measurement of blood pressure, heart rate, height and weight, body composition
Immediately after the childbirth following procedures will be done:
- assessment of pregnancy outcome (duration of pregnancy, child birth weight, child birth length and Apgar score)
- placental tissue will be taken and stored for measurement of matrix metalloproteinase 9
Undersøgelsestype
Undersøgelsestype
Tilmelding (Forventet)
Tilmelding
Kontakter og lokationer
Studiekontakt
Studiekontakt
- Navn: Martina Vulin, MD
- Telefonnummer: +38531512300
- E-mail: martina.vulin@gmail.com
Studiesteder
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Osijek, Kroatien, 31000
- Rekruttering
- Osijek University Hospital
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Kontakt:
- Martina Vulin, MD
- Telefonnummer: +385 31 512 300
- E-mail: martina.vulin@gmail.com
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Barn
- Voksen
- Ældre voksen
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Prøveudtagningsmetode
Studiebefolkning
Beskrivelse
Inclusion Criteria:
- healthy pregnant women in the third trimester of pregnancy (37-38 weeks of pregnancy)
Exclusion Criteria:
- smoking
- prenatal hypertension
- thrombophilia
- low molecular weight heparin use
- coronary heart disease
- preconception diabetes
- gestational diabetes
- renal impairment
- cerebrovascular and peripheral artery disease
- any other preconception disease that could affect vascular and endothelial function
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Antal grupper/kohorter
Kohorter og interventioner
Gruppe / kohorteGruppe / kohorte |
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Low-salt (LS) group
intake of < 5 g of salt per day
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Normal-salt (NS) group
intake of 5 - 7.5 g of salt per day
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High-salt (HS) group
intake of 7.5 - 10 g of salt per day
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Very high-salt (VHS) group
intake of > 10 g of salt per day
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Maternal systemic microvascular function
Tidsramme: at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Skin microvascular reactivity assessed by Laser Doppler flowmetry (post-occlusive reactive hyperemia, iontophoresis of acetylcholine and sodium nitroprusside) - measured in perfusion units (PU)
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at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Maternal systemic macrovascular function
Tidsramme: at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Vascular ultrasound measurement of brachial artery flow mediated dilation (FMD)
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at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Maternal uteroplacental function
Tidsramme: at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Ultrasound color Doppler measurement of umbilical artery and fetal middle cerebral artery blood flow
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at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Oxidative stress - thiobarbituric acid reactive substances (TBARS)
Tidsramme: at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Measurement of biomarkers of oxidative stress level.
Thiobarbituric acid reactive substances (TBARS) - biomarker of lipid peroxidation.
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at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Matrix metalloproteinase 9
Tidsramme: at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy) (serum) and immediately after childbirth (placental tissue sample)
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ELISA measurement of serum matrix metalloproteinase 9 level in mother serum and placental tissue sample (taken after childbirth)
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at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy) (serum) and immediately after childbirth (placental tissue sample)
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Endocan
Tidsramme: at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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ELISA measurement of serum endocan level - proteoglycan associated with endothelium activation
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at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Pregnancy outcome - duration
Tidsramme: the outcome measure will be assessed at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Duration of pregnancy (weeks and days)
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the outcome measure will be assessed at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Pregnancy outcome - birth weight
Tidsramme: at one time point immediately after childbirth
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Birth weight (in grams)
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at one time point immediately after childbirth
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Pregnancy outcome - birth length
Tidsramme: at one time point immediately after childbirth
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Birth length (in cm)
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at one time point immediately after childbirth
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Pregnancy outcome - Apgar score
Tidsramme: at one time point immediately after childbirth
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Apgar score (in Apgar score scale, a total score of 1 to 10; the higher the score, the better the baby is doing after birth)
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at one time point immediately after childbirth
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Andre resultatmål
Andre resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Blood pressure
Tidsramme: at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Automatic oscillometric measurement of systolic and diastolic blood pressure (in mmHg)
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at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Heart rate
Tidsramme: at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Automatic oscillometric measurement of heart rate (bpm)
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at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Body mass index
Tidsramme: at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Measurement of BMI (kg/m2)
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at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Body composition
Tidsramme: at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Body composition and body fluid status measurement by a four-terminal portable impedance analyzer.
Based on the value of skin resistance (Ohm) empirically derived formulas (the original manufacturer's software) will be used to calculate the estimated Fat Free Mass (FFM kg) and Fat (Fat Mass kg).
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at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Body fluid status
Tidsramme: at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Body fluid status measurement by a four-terminal portable impedance analyzer.
Based on the value of skin resistance (Ohm) empirically derived formulas (the original manufacturer's software) will be used to calculate the estimated Total Body Water (TBW L), Extracellular Water (ECW L), Intracellular Water (ICW L), Plasma Fluid (PF L) and Interstitial Fluid (IF L).
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at one time point in the third trimester of pregnancy (37-38 weeks of pregnancy)
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Studiestol: Ines Drenjančević, MD, PhD, Faculty of Medicine Josip Juraj Strossmayer University of Osijek
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Forventet)
Primær færdiggørelse
Studieafslutning (Forventet)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- 602-04/21-08/07
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
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