Jornal Vascular Brasileiro
https://jvascbras.org/article/doi/10.1590/S1677-54492009000100002
Jornal Vascular Brasileiro
Original Article

Estudo comparativo de eco-Doppler com arteriografia na avaliação da doença oclusiva aorto-ilíaca

Ricardo Cesar Rocha Moreira

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Resumo

Contexto: A arteriografia com contraste (AC) tem sido o exame tradicional de avaliação de pacientes com suspeita de doença oclusiva aorto-ilíaca (DOAI). Recentemente, métodos menos invasivos, como a eco-Doppler, têm sido usados com a mesma finalidade. Objetivo: Comparar prospectivamente a eco-Doppler com a AC e eventual manometria arterial direta (MAD) na avaliação pré-operatória de pacientes com suspeita de DOAI. Métodos: Foram submetidos a eco-Doppler e a AC 125 pacientes internados para tratamento de doença arterial oclusiva dos membros inferiores, avaliando comparativamente 552 segmentos da aorta infrarrenal e das artérias ilíacas comum e externa. As lesões encontradas foram classificadas em cinco categorias: 1) normal e estenose leve (0 a 19%); 2) estenose moderada (20 a 49%); 3) estenose significativa (50 a 79%); 4) estenose crítica (80 a 99%); e 5) oclusão total. A MAD foi usada em 19 segmentos de 15 pacientes para classificar lesões limítrofes entre duas categorias. Foram calculados índices de validade (sensibilidade, especificidade, valor preditivo positivo, valor preditivo negativo e acurácia) para distinguir lesões hemodinamicamente significativas de não-significativas e para distinguir estenoses críticas de oclusões. O padrão-ouro foi AC, complementado pela MAD. Foram também calculados coeficientes de correlação kappa entre arteriografias e eco-Doppler para o conjunto dos segmentos aorto-ilíacos. Resultados: Lesões clinicamente relevantes (estenoses de 50 a 99% e oclusões totais) foram observadas na eco-Doppler em 163 segmentos (29,5%) e na AC em 158 segmentos (28,6%). A eco-Doppler mostrou altos índices de validade para distinguir lesões hemodinamicamente significativas de lesões não-significativas em todos os segmentos (acurácia = 92%; kappa = 0,81) e para diferenciar estenoses críticas de oclusões (acurácia = 86%; kappa = 0,73). Os índices de correlação entre os resultados das eco-Doppler e das AC foram ótimos em todos os segmentos aorto-ilíacos. Conclusão: A eco-Doppler apresenta elevados índices de validade e ótimos coeficientes de correlação com a AC na avaliação de pacientes com suspeita de DOAI.

Palavras-chave

Aorta abdominal, artéria ilíaca, aterosclerose, angiografia, eco-Doppler

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