Browsing by Subject "Doppler effect"

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    Doppler sonographic assessment of posttraumatic reflex sympathetic dystrophy
    (John Wiley and Sons Ltd, 2003) Pekindil G.; Pekindil Y.; Sarikaya A.
    To reveal the arterial Doppler sonographic findings in cases of posttraumatic reflex sympathetic dystrophy. Methods. Eleven patients had hand reflex sympathetic dystrophy, and 9 had foot reflex sympathetic dystrophy. The duration of symptoms ranged from 1 to 28 weeks, and the history of fracture ranged from 6 to 48 weeks. Bilateral brachial or popliteal arteries proximal to injuries were evaluated by Doppler sonography with a 7.5-MHz linear transducer. All patients also had triphasic bone scintigraphy and extremity thermography. Results. Two patients had monophasic waveforms and 4 had low-pulsatility triphasic waveforms on the affected limbs when compared with the asymptomatic limbs. All opposite asymptomatic limbs had normal triphasic waveforms in these 6 cases. Spectral analysis revealed a loss or decrease of a normal reversed flow component with a reduced pulsatility index on the affected limb. Fourteen other patients had symmetric triphasic waveforms. We observed that the patients who had stage 1 reflex sympathetic dystrophy and warm limbs with durations of symptoms of more than 2 weeks had positive Doppler sonographic findings, whereas all patients with stage 2 reflex sympathetic dystrophy and all with normal skin temperature, regardless of stage, had normal waveforms. Conclusions. Doppler sonography revealed loss of normal triphasic arterial waveforms in some of the cases of stage 1 disease, whereas many cases of stage 1 disease and all cases of stage 2 disease had normal findings. Therefore, we think that Doppler sonography cannot be used for the diagnosis of reflex sympathetic dystrophy but may help in assessing hemodynamic stages of the disease.
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    The significance of venous dominance in color Doppler ultrasound for the diagnosis of primary nodular skin lesions: A new perspective in classification
    (Elsevier Inc., 2006) Özkol M.; Yoleri L.; Demir M.A.; Demireli P.; Pabuşçu Y.
    The aim of this study was to investigate the significance of color Doppler ultrasound (CDUS) findings in the differential diagnosis of suspicious nodular skin lesions and to compare the results according to the Giovagnorio 1999 classification and the modified classification. Forty nodular skin lesions were evaluated with CDUS and US. The number of arteries and veins was recorded in hypervascular lesions. Findings were compared with histopathological results. The specificity and predictivity of the modified classification were higher than those of the Giovagnorio 1999 classification. © 2006 Elsevier Inc. All rights reserved.