Second Trimester Maternal Serum Homocysteine Levels and Uterine Artery Doppler for Prediction of Preeclampsia and Placentation Disorders
Second Trimester Maternal Serum Homocysteine Levels and Uterine Artery Doppler for Prediction of Preeclampsia and Poor Placentation Disorders
Studieoversigt
Status
Betingelser
Detaljeret beskrivelse
These participants had uterine artery Doppler investigations, as part of a routine scan between the 18th and the 22nd week of pregnancy. The investigators were blinded to the results of the biochemistry results.
All samples of the tHcy measurement were collected between 15 and 19 weeks of gestational age, as calculated from the last menstrual period or from early ultrasound dates (when the menstrual dates differed from the specified gestation). The plasma tHcy concentrations were measured by means of a fluorescence polarization immunoassay (9).
Uterine artery flow velocity waveforms were obtained using an SD 800 Doppler system (Philips Medical Systems, Gland, Switzerland) with a 3.5/5-MHz linear array probe. The high-pass filter was set at 100 Hz. One operator performed the measurements. The use of mean resistance index (RI) cutoff points with bilateral and unilateral notches has already been shown to improve the efficacy of uterine artery Doppler screening using qualitative assessment (10). A screen-positive or abnormal result was defined as bilateral notches and a mean RI >0.55 (50th centile), unilateral notches and a mean RI >0.65 (80th centile), and absence of notches and a mean RI >0.7 (95th centile) (11). Women with these abnormal results were offered growth scans, amniotic fluid volume assessment, and umbilical artery Doppler every 4 weeks until 36 weeks in view of the recognized increased risk of isolated IUGR (12), unless there were other clinical indications, which necessitated closer surveillance
Undersøgelsestype
Tilmelding (Faktiske)
Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Prøveudtagningsmetode
Studiebefolkning
Beskrivelse
Inclusion Criteria:
- Spontaneous pregnancies without history of previous risk factors for preeclampsia
Exclusion Criteria:
- multiple pregnancy, non-intact renal function, and hypertension before 20 weeks of gestation, diabetes mellitus and/or chronic diseases, women taking folic acid supplementations, women using antifolate drugs, and maternal age more than 40 years
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Kohorter og interventioner
Gruppe / kohorte |
|---|
|
Uncomplicated pregnancies
|
|
Preeclampsia
|
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Isolated IUGR
|
|
Any complication
|
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Tidsramme |
|---|---|
|
development of placentation disorders
Tidsramme: 28-40 weeks gestational age
|
28-40 weeks gestational age
|
Samarbejdspartnere og efterforskere
Sponsor
Efterforskere
- Ledende efterforsker: Ahmed Maged, Kasr Alainy Medical School
Publikationer og nyttige links
Datoer for undersøgelser
Studer store datoer
Studiestart
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- 153 (CPEIC)
Plan for individuelle deltagerdata (IPD)
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