Prediction of preeclampsia by means of Doppler flowmetry of uterine artery and flow-mediated dilation of brachial artery

• Published in: Radiologia brasileira 2014-02, Vol.47 (1), p.14-17
• Main Authors: Calixto, Aline Costa, Brandão, Augusto Henriques Fulgêncio, Toledo, Luana Lopes, Leite, Henrique Vítor, Cabral, Antônio Carlos Vieira
• Format: Article
• Language: English
• Subjects: RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
• ISSN: 0100-3984; 1678-7099; 0100-3984
• DOI: 10.1590/S0100-39842014000100008

Objective To evaluate the association of Doppler of uterine artery and flow-mediated dilation of brachial artery (FMD) in the assessment of placental perfusion and endothelial function to predict preeclampsia. Materials and Methods A total of 91 patients considered as at risk for developing preeclampsia were recruited at the prenatal unit of the authors' institution. All the patients underwent FMD and Doppler of uterine arteries between their 24th and 28th gestational weeks. Calculations of sensitivity and specificity for both isolated and associated methods were performed. Results Nineteen out of the 91 patients developed preeclampsia, while the rest remained normotensive. Doppler flowmetry of uterine arteries with presence of bilateral protodiastolic notch had sensitivity of 63.1% and specificity of 87.5% for the prediction of preeclampsia. Considering a cutoff value of 6.5%, FMD showed sensitivity of 84.2% and specificity of 73.6%. In a parallel analysis, as the two methods were associated, sensitivity was 94.2% and specificity, 64.4%. Conclusion The association of Doppler study of uterine arteries and FMD has proved to be an interesting clinical strategy for the prediction of preeclampsia, which may represent a positive impact on prenatal care of patients considered as at high-risk for developing such a condition. Objetivo Avaliar, para a predição de pré-eclâmpsia, a capacidade associada da dopplerfluxometria de artérias uterinas e da dilatação fluxo-mediada da artéria braquial (FMD), como métodos de avaliação da perfusão placentária e da função endotelial. Materiais e Métodos Um total de 91 pacientes consideradas de risco para o desenvolvimento de pré-eclâmpsia foi recrutado do serviço de pré-natal de nossa instituição. Todas foram submetidas a FMD e a dopplerfluxometria de artérias uterinas entre 24 e 28 semanas de gestação. Cálculos de sensibilidade e especificidade dos dois exames isolados e associados foram realizados. Resultados Do total de 91 pacientes recrutadas, 19 desenvolveram pré-eclâmpsia, sendo que as restantes se mantiveram normotensas. Para a predição de pré-eclâmpsia, a dopplerfluxometria de artérias uterinas, através da presença da incisura protodiastólica bilateral, apresentou sensibilidade de 63,1% e especificidade de 87,5%. Considerando um valor de corte de 6,5%, a FMD apresentou sensibilidade de 84,2% e especificidade de 73,6%. Os dois testes associados, em análise paralela, apresentaram sensibilidade de 94,2% e especificidade de