Browsing by Subject "DOPPLER"

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Anterolateral Thigh Flap Design by Using Suprafascial Course of the Perforator
    (LIPPINCOTT WILLIAMS & WILKINS) Bali, ZU; Keçeci, Y; Pabuscu, Y; Yoleri, L
    Objectives Recently, anterolateral thigh flap has become one of the most commonly used free flaps in reconstructive surgery. Although its pedicle has relatively sufficient length, it falls short in some circumstances. Eccentric perforator location can be used to lengthen the pedicle, but flap tip viability can be a problem in this case. In addition, partial flap loss can be encountered in perforator flaps. The aim of this study was the use of multidetector computed tomographic angiography in preoperative mapping to overcome these problems. Materials and Methods Anterolateral thigh perforator flap was planned for various soft-tissue reconstructions in 19 patients. There were 15 males and 4 female patients with ages ranging from 19 to 65 years. These patients were evaluated with preoperative multidetector computed tomographic angiography to choose and to trace the course of the perforators. Flaps were designed according to the suprafascial course of the perforators. Perforators were safely located eccentrically when needed. Pedicle length and complications, such as infection, wound dehiscence, and partial or total flap loss, were recorded. Results Perforators were located eccentrically in 8 patients and centrally in the other 11 patients. Eleven flaps were used in lower leg reconstruction, 2 flaps in popliteal region, and 6 flaps in head and neck. All flaps survived and any partial or total loss did not occur. There was not any infection and wound problem. Conclusions Multidetector computed tomographic angiography can reveal the suprafascial course of the perforator and help design anterolateral thigh perforator flap. By using this kind of mapping, perforators can be safely located eccentrically to lengthen the pedicle and partial flap loss can be prevented.
  • No Thumbnail Available
    Item
    The assessment of placental volume and mean gray value in preeclamptic placentas by using three-dimensional ultrasonography
    (TAYLOR & FRANCIS LTD) Ulkumen, BA; Pala, HG; Uyar, Y; Koyuncu, FM; Baytur, YB
    Objectives: We aimed to evaluate the placental volume and placental mean gray value in preeclampsia and healthy placentas by using three-dimensional (3D) ultrasonography and Virtual Organ Computer-aided AnaLysis (VOCAL). Methods: This case-control prospective study consisted of 27 singleton pregnancies complicated by preeclampsia and 54 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 program, and 3D histogram was used to calculate the volumetric mean gray value (%). Results: Preeclamptic and control group consisted of 27 (mean age: 28.90 +/- 5.95 years, mean gestation: 32.0 +/- 4.55 weeks) and 54 (mean age: 29.48 +/- 5.78 years, mean gestation: 32.61 +/- 4.23 weeks) singleton pregnancies, respectively. Placental volume was significantly smaller in preeclampsia (250.62 +/- 91.69 versus 370.98 +/- 167.82 cm(3); p = 0.001). Volumetric mean gray value of the placenta was significantly higher in preeclampsia (38.24 +/- 8.41 versus 33.50 +/- 8.90%; p = 0.043). Placental volume was significantly correlated with the estimated fetal weight (r = 0.319; p = 0.003). There was negative significant relation between placental volume and umbilical artery pulsatility index, resistance index and systolic/diastolic ratio (r = -0.244, p = 0.024; r = -0.283, p = 0.005; r = -0.241, p = 0.024, respectively). Conclusions: Placental volume diminishes significantly in preeclampsia, whereas volumetric mean gray values increases. This may reflect the early alterations in preeclamptic placentas, which may help to understand the pathophysiology better.