1995
DOI: 10.7863/jum.1995.14.3.175
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Does transvaginal color Doppler sonography differentiate between developing and involuting ectopic pregnancies?

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Cited by 18 publications
(6 citation statements)
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“…The lack of a significant difference between the 2 groups in the flow distribution within the wall or the percentage of the wall circumference with blood flow on Doppler images may be due to the abundant vascularity seen in the periphery of both the tubal ring of an ectopic pregnancy and the wall of a corpus luteum. The corpus luteum has been described as the gland "with the highest perfusion per gram of any tissue in the body," 5 with peripheral flow seen in 92% to 95%, [5][6][7] whereas the trophoblastic ring of the ectopic pregnancy has shown blood flow in 85% to 93% 8,9 of study cases. Thus, color Doppler imaging was unable to differentiate the corpus luteum from an ectopic pregnancy.…”
Section: Discussionmentioning
confidence: 99%
“…The lack of a significant difference between the 2 groups in the flow distribution within the wall or the percentage of the wall circumference with blood flow on Doppler images may be due to the abundant vascularity seen in the periphery of both the tubal ring of an ectopic pregnancy and the wall of a corpus luteum. The corpus luteum has been described as the gland "with the highest perfusion per gram of any tissue in the body," 5 with peripheral flow seen in 92% to 95%, [5][6][7] whereas the trophoblastic ring of the ectopic pregnancy has shown blood flow in 85% to 93% 8,9 of study cases. Thus, color Doppler imaging was unable to differentiate the corpus luteum from an ectopic pregnancy.…”
Section: Discussionmentioning
confidence: 99%
“…Increased vascularity around the periphery of an ectopic gestational sac forms a peritrophoblastic ring 13,16 , as can be seen in color flow imaging. The image of this ultrasonographically recognizable vascularity depends greatly on the vitality of the trophoblasts, as well as on the amount and type of bleeding into the surrounding tissues which may occur as the trophoblastic mass increases 17 . It is clear that, after destruction of the intervillous architecture due to ruptures and bleeding, or when the ectopic pregnancy fails to thrive, this ring can become poorly recognizable in color flow imaging.…”
Section: Discussionmentioning
confidence: 99%
“…A ultra-sonografia transvaginal com Doppler colorido tem o seu papel no diagnóstico da gravidez ectópica, mas a sua função mais importante é avaliar o grau de vascularização da massa anexial para orientar e acompanhar a evolução das pacientes submetidas ao tratamento sistêmico com dose única de metotrexato 2,3,4 .…”
Section: Palavras-chaveunclassified
“…Estudos dopplervelocimétricos foram classificados em três grupos de risco para insucesso do tratamento: elevado, médio e baixo risco. O de elevado risco caracteriza-se por fluxo trofoblástico em mais de 2/3 da massa anexial 3 ; o de médio risco, quando compromete de 1/3 a 2/3 do anel tubário (Figura 1); classificamos de baixo risco as seguintes situações: fluxos que acometem menos de 1/3 da massa anexial, ausência de vascularização ao redor da massa ou presença de fluxos arteriais de resistência aumentada (IR maior que 0,5) 4 . A presença de fluxos de morfologia bizarra que se apresentam com importante alargamento espectral, com tempos de aceleração longos e diástoles ausentes ou negativas 7,9 , e o aumento da vascularização venosa ao redor da massa com formação de lagos venosos foram considerados como prováveis sinais de involução trofoblástica.…”
Section: Pacientes E Métodounclassified