Navegando por Palavras-chave "Middle cerebral artery"
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- ItemAcesso aberto (Open Access)Alterações ultra-sonográficas na gravidez Rh negativo sensibilizada avaliada pela espectrofotometria do líquido amniótico e pela dopplervelocimetria da artéria cerebral média(Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2006-02-01) Nardozza, Luciano Marcondes Machado [UNIFESP]; Camano, Luiz [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Pares, David Baptista da Silva [UNIFESP]; Chinen, Paulo Alexandre [UNIFESP]; Lobo, Guilherme Antonio Rago; Universidade Federal de São Paulo (UNIFESP)OBJECTIVE: To evaluate and compare existing ultrasound findings in women with Rh-alloimmunized pregnancies with diagnosis of fetal anemia by spectrophotometric analysis of amniotic fluid or Doppler ultrasound of the fetal middle cerebral artery. MATERIALS AND METHODS: This was an observational descriptive study involving 99 patients evaluated between January 1995 and January 2004. Patients were divided into two groups: 74 Rh-isoimmunized women submitted to spectrophotometry of the amniotic fluid (group S) and 25 Rh-isoimmunized women submitted to Doppler ultrasound of fetal middle cerebral artery (group D) to evaluate fetal anemia. Ultrasound findings in the two groups were compared. RESULTS: Placental anomalies, mainly placentomegaly and textural irregularities were more frequently seen in pregnant women followed up with spectrophotometry of the amniotic fluid compared to those followed up with Doppler ultrasound (64% X 32%, p = 6,294). CONCLUSION: The frequency of abnormal ultrasound findings was 2-fold higher in pregnancies evaluated with spectrophotometry of the amniotic fluid compared to those followed up with Doppler ultrasound.
- ItemAcesso aberto (Open Access)Aplicação da terapia por contensão induzida em pacientes com acidente vascular cerebral em território da artéria cerebral média(Universidade Federal de São Paulo (UNIFESP), 2005) Diniz, Leila [UNIFESP]; Massaro, Ayrton Roberto [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)Objetivo: Este estudo piloto procurou revisar a metodologia e discutir a aplicação da Terapia por Contensão Induzida (TCI) nos pacientes com acidente vascular cerebral isquêmico (AVCI) crônico, em um centro de reabilitação brasileiro. Método: Uma ampla revisão da literatura médica foi realizada para adaptar esta técnica em nosso meio. Foram selecionados 10 pacientes que se submeteram a 6 horas de tratamento por duas semanas consecutivas. Entre os critérios de seleção destacam-se AVCI em território da artéria cerebral média. Nestes 14 dias os pacientes foram submetidos a atividades motoras repetitivas utilizando o membro superior parético, enquanto o membro não parético era mantido com um dispositivo de contenção. Resultados: Houve melhora significativa no déficit motor do membro superior parético e concomitante melhora na resposta ao Teste de Função Motora de Wolf. Conclusão: Esta nova técnica de reabilitação específica para pacientes com déficit motor moderado em membro superior parético é viável em nosso país. Nosso estudo sugere que a dominância e tempo de lesão têm um efeito modificador sobre o tratamento em pacientes com lesão isquêmica crônica no território da artéria cerebral média.
- ItemSomente MetadadadosEvolution of 3-D power Doppler indices of fetal brain in normal pregnancy(Elsevier B.V., 2009-04-01) Machado Nardozza, Luciano Marcondes [UNIFESP]; Araujo, Edward [UNIFESP]; Simioni, Christiane [UNIFESP]; Torloni, Maria Regina [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)We assessed the vascular indices of the anterior territory of the middle cerebral artery (MCA) in normal pregnancies using 3-D power Doppler (3DPD). A cross-sectional study was carried out on 90 normal pregnancies between 24 and 35 weeks. All examinations were performed by a single operator using a volumetric transducer. the anterior territory of the MCA was scanned and the volumes were captured using 3DPD. the sphere mode of the VOCAL program was used to calculate the following vascular indices: vascularization index (VI), flow index (FI) and vascularization and flow index (VFI). Models of polynomial regression and Pearson's correlation coefficient were used to evaluate the correlation between gestational age (GA) and the vascular indices. the 3DPD vascular indices had a low correlation with gestational age (VI - r = 0.324, p = 0.002; FI - r = 0.375, p < 0.001; VFI - r = 0.374, p < 0.001). There was a low correlation between GA and the 3DPD vascular indices of the anterior territory of the MCA. (E-mail: lunardozza@uol.com.br) (c) 2009 World Federation for Ultrasound in Medicine & Biology.
- ItemAcesso aberto (Open Access)Intervalos de referência do pico de velocidade sistólica da artéria cerebral média fetal na população brasileira(Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2008-12-01) Nardozza, Luciano Marcondes Machado [UNIFESP]; Araujo Júnior, Edward [UNIFESP]; Simioni, Christiane [UNIFESP]; Camano, Luiz [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)OBJECTIVE: To determine a reference curve for the peak systolic velocity of fetal middle cerebral artery. MATERIALS AND METHODS: The authors developed a cross-sectional study with 143 healthy pregnant women between the 23rd and 35th gestational weeks. A bidimensional axial scan of the fetal skull was performed, including the thalami and pellucid septum. Subsequently, the middle cerebral artery was visualized with the color Doppler mode. The pulsed-wave Doppler transducer was positioned over the origin of this vessel, at < 20° insonation angle. The correlation between the peak systolic velocity of the middle cerebral artery and gestational age was evaluated by means of the Pearson's correlation coefficient (r). Regression models were utilized in the construction of a table with multiples of the medians of the middle cerebral artery peak systolic velocity for each gestational age. Additionally, reference values for this variable were determined. RESULTS: A strong correlation was observed between the middle cerebral artery peak systolic velocity and gestational age (r = 0.70; p < 0.001). Values of middle cerebral artery peak systolic velocity were calculated for the following multiples of the medians: 1.0, 1.29, 1.5, 1.55. The 2.5th and 97.5th percentiles were determined for the middle cerebral artery peak systolic velocity ranging between 24.33 cm²/s and 78.36 cm²/s. CONCLUSION: A nomogram for the fetal middle cerebral artery peak systolic velocity during the second half of pregnancy was generated.