Navegando por Palavras-chave "plethysmography"

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    Avaliação da insuficiência da veia safena magna com classificação C2 e C3 (CEAP) pela pletismografia a ar e pelo eco-Doppler colorido
    (Sociedade Brasileira de Angiologia e de Cirurgia Vascular (SBACV), 2012-09-01) Seidel, Amélia Cristina [UNIFESP]; Rossetti, Leandro Pablos; Juliano, Yara [UNIFESP]; Novo, Neil Ferreira [UNIFESP]; Miranda Jr, Fausto [UNIFESP]; UEM Curso de Medicina; UEM curso de Medicina; Universidade Federal de São Paulo (UNIFESP); Universidade de Santo Amaro Departamento de Saúde Pública
    BACKGROUND: With the presence of venous reflux, there is need evaluate the clinical severity by quantifying the hemodynamic effect of venous incompetence and definition of their anatomical distribution. OBJECTIVE: To determine and correlate the degree of reflux of the greater saphenous vein (insufficiency) in a clinical CEAP C2/C3 by air plethysmography and color Doppler ultrasonography. METHODS: We prospectively investigated 87 limbs with reflux of the greater saphenous vein as ascertained by Doppler ultrasound and 32 limbs without signs or symptoms of the venous disease. All patients underwent clinical examinations using air plethysmography and Doppler ultrasound of the lower limbs. The parameters used with the Doppler ultrasound were: the diameter of the saphenous vein (seven levels) and the speed and time of reflux. In the plethysmography, the venous filling index, ejection fraction and residual volume fraction were also considered. RESULTS: Of the 119 limbs, 61 were class C2. In comparing the diameters of the vein of the control group with the study group there were statistically significant differences. There was an exception at the malleolus level. Using the Spearman correlation to analyze the indices for the plethysmography and Doppler ultrasound it showed some difference, but the coefficient of determination (r²) showed that they were weak. CONCLUSIONS: The parameters of the plethysmography did not correlate with the degree of reflux in the greater saphenous vein. There was a very weak correlation between their values, time and speed of reflux. Only the venous filling index correlated with venous reflux. The ejection fraction and residual volume fraction were not important for discrimination of clinical severity.
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    A variabilidade hemodinâmica venosa detectada pelos parâmetros da pletismografia a ar nas classes clínicas da classificação CEAP
    (Sociedade Brasileira de Angiologia e de Cirurgia Vascular (SBACV), 2007-12-01) Oliveira, Ricardo De Ávila; Barros Junior, Newton de [UNIFESP]; Miranda Junior, Fausto [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    BACKGROUND: The hemodynamic variability of air plethysmography is known in the literature, but the clinical significance of this event has not been investigated yet, and there may be some unexplored clinical meaning. There is known superpositioning of CEAP clinical classes (C0-C6) and even in lower limbs of the same clinical classes. OBJECTIVE: To evaluate hemodynamic variability of air plethysmography parameters in CEAP clinical classes. METHODS: This retrospective study compares lower limb varicose disease between C0 and C6 CEAP clinical classes with venous hemodynamic parameters obtained by air plethysmography. Data were tabled and analyzed according to their clinical classes by Kruskal-Wallys and Barllet variance tests. RESULTS: A total of 310 examinations were performed in 230 patients, aged between 19-81 years (mean = 46.2 years). Venous filling index and functional venous volume increased hemodynamic variability when compared with CEAP C0. This was demonstrated by the variability coefficient, which was 28.12% for venous filling index in C0 and higher than 57% between clinical classes C2 and C6. Ejection fraction and residual venous fraction had no increase in variability when compared with CEAP C0. CONCLUSION: Venous filling index is the best parameter for assessment and screening patients with chronic venous insufficiency, but has great variability in C2 to C6 CEAP clinical classes.