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Clinical Trial Summary

Our aim was to investigate and compare placental elasticity by using Shear wave elastography (SWE) in patients with gestational diabetes mellitus (GDM) with and without insulin to non-diabetic controls.

This prospective study included 319 pregnant patients. Three groups were created as follows: Group 1 (n= 79, GDM with insulin therapy), Group 2 (n=90, GDM with only diet) and Group 3 (n= 150, healthy controls) All patients were above 36 gestational weeks with anterior placenta. Totally six measurements including the central and peripheral parts (right, left) of the placenta both from maternal and fetal sites were obtained with SWE. Demographic, obstetrics, fetal and perinatal features were also compared. Receiver operating characteristic analysis was plotted and cut-off of elastographic velocity values were noted


Clinical Trial Description

This prospective study included singleton pregnant women aged between 18-45 years who applied for third trimester prenatal examination (36 gestational weeks and above) between May 2019 and December 2019 at Women and Children Disease Training and Research Hospital, Istanbul, Turkey. Ethical documents including Declaration of Helsinki were approved by local institutional review board (Approval number:49/2019) and a written informed consent was obtained from all patients. The study participants were divided into three groups according to treatments. While Group 1 consisted of patients with GDM using insulin therapy (GDM A2), patients with GDM treated with only diet (without any medical therapy) created Group 2 (GDM A1). Group 3 included healthy controls. Insulin therapy was initiated when target cut-off values were exceeded according to Carpenter and Coustan criteria. Patients with anterior placenta were included in the study because the effectiveness of the method decreased. Gestational age was recorded regarding last menstrual period and was checked in all participants by using a first trimester ultrasound report. All GDM patients were followed up in perinatology clinic and timing of delivery was organized individually basically on obstetrical indications. Ultrasonographic evaluation and SWE method were performed by single perinatologist Elastographic examinations were performed by physicians using Samsung HS70A ultrasound system with a Samsung CA1-7A convex transducer and S-Shear wave technique. During the examination, patients were lying in supine position, breathing levels kept steady to prevent noise and artifacts and minimum pressure were applied on the transducer to eliminate misleading tissue compression. A region of interest (ROI) box of 10 × 10 mm was positioned on placenta and six measurements were obtained from central and peripheral zones of placenta while avoiding vascular structures. Considering the disc-like structure of the placenta measurement areas were divided into six regions as follows: maternal right, maternal central, maternal left, fetal right, fetal central and fetal left. All measurements taken from different zones were recorded individually along with the mean value generated using IQR method. Through this approach, datasets were established not just for the auto-calculated mean value but also zone specific values for further analysis. All measurements were obtained in both kilopascal (kPa) and m/s formats. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT04455880
Study type Interventional
Source Adana Numune Training and Research Hospital
Contact
Status Completed
Phase N/A
Start date May 15, 2019
Completion date December 30, 2019

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