Browsing by Subject "DOPPLER ULTRASOUND"

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    The alteration in placental volume and placental mean grey value in growth-restricted pregnancies assessed by 3D ultrasound
    (TAYLOR & FRANCIS INC) Ulkumen, BA; Pala, HG; Uyar, Y; Koyuncu, FM; Baytur, YB
    We aimed to evaluate the volumetric and echogenic alterations in placentas between the intrauterine growth restriction (IUGR) and normal pregnancies using three-dimensional ultrasound and virtual organ computer-aided analysis (VOCAL) software. This case-control prospective study consisted of 48 singleton pregnancies complicated by IUGR and 60 healthy singleton pregnancies matched for maternal age, gestational age and parity. Placental volume (PV) and placental volumetric mean grey values (MGV) were evaluated. PV (cm(3)) was analysed using the VOCAL imaging analysis program, and 3D histogram was used to calculate the volumetric MGV (%). PV was 278.50 +/- 63.68 and 370.98 +/- 97.82 cm(3) in IUGR and control groups, respectively (p = 0.004). MGV of the placenta was 38.24 +/- 8.41 and 38.24 +/- 8.41 in IUGR and control groups, respectively (p = 0.30). receiver operator curve (ROC) curve analysis revealed that area under curve was 0.731 for PV. Correlation analysis revealed that PV was significantly associated with estimated fetal weight (r = 0.319, p = 0.003), biparietal diameter (r = 0.346, p = 0.002), head circumference (r = 0.269, p = 0.019), abdominal circumference (r = 0.344, p = 0.002) and femur length (r = 0.328, p = 0.004). PV was inversely related to the umbilical artery pulsatility index (r = - 0.244, p = 0.017). To the best of our knowledge, this is the first study evaluating volumetric MGV in IUGR placentas by comparing them with healthy pregnancies. Our study showed that PV diminishes significantly in IUGR pregnancies, whereas volumetric MGV does not alter significantly.
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    Three-dimensional ultrasonographic placental volume in gestational diabetes mellitus
    (TAYLOR & FRANCIS LTD) Pala, HG; Artunc-Ulkumen, B; Koyuncu, FM; Bulbul-Baytur, Y
    Objectives: We aimed to evaluate the placental volume and placental mean gray value in gestational diabetes mellitus (GDM) and healthy placentas using three-dimensional (3D) ultrasound and Virtual Organ Computer-aided AnaLysis (VOCAL).Methods: This case-control prospective study consisted of 39 singleton pregnancies complicated by GDM and 42 healthy singleton pregnancies matched for gestational age, maternal age and parity. Placental volume and placental volumetric mean gray values were evaluated. The placental volume (cm(3)) was analyzed using the VOCAL imaging analysis program and 3D histogram was used to calculate the volumetric mean gray value (%).Results: Placental volume was significantly larger in GDM (411.59170.82 versus 343.86 +/- 128.94cm(3); p=0.046). There was no significant difference in mean gray value between GDM and healthy placentas (36.65 +/- 7.02 versus 38.71 +/- 7.91, respectively; p=0.277). Placental volume was significantly correlated with gestational week (r=0.219, p=0.035) and parity (r=0.228, p=0.048). There was negative significant relation between placental volume and umbilical artery systolic/diastolic ratio, pulsatility index and resistance index (r=-0.278, p=0.007; r=-0.315, p=0.002; r=-0.322, p=0.001, respectively).Conclusions: Placental volume increases significantly in GDM, whereas mean gray values do not alter significantly. These data may reflect the placental changes in GDM placentas that may help to understand the pathophysiology better.