Objectives To correlate the ankle-brachial index and photographic thermography findings in patients with peripheral arterial disease. Methods Photographic thermography was performed at the foot level, and ankle-brachial index was measured in 72 lower limbs of 53 patients with peripheral arterial disease who were divided into calcified artery, patients with an ankle-brachial index greater than 1.4; and non-calcified artery classified as asymptomatic, mild, moderate, and severe on the basis of peripheral arterial disease severity. Fisher’s exact test was used for categorical data, and Wilcoxon test was used for numerical data. Results Spearman’s correlation analysis showed a strong correlation (R = 0.7) between the ankle-brachial index and the mean plantar temperature in patients without lower limb artery calcification. Linear regression yielded the predictor equation Y = 3.296 × X + 29.75, wherein ankle-brachial index (X) can be predicted on the basis of temperature values. Spearman’s correlation test showed no significance ( p = 0.2174) in patients with arterial calcification. Kruskal–Wallis test with post hoc analysis using Dunn’s test for multiple comparisons showed that the mean plantar temperature was lower in patients with arterial calcification. Conclusion Photographic thermography findings show a strong correlation with ankle-brachial index in patients with non-calcified arteries.
CONTEXTO: Como a úlcera é uma grave complicação da insuficiência venosa crônica, é necessário o conhecimento amplo de sua fisiopatologia. A ultrassonografia Doppler venosa é o exame complementar mais adequado, que possibilita o estudo do sistema venoso superficial e profundo, sua anatomia e fisiologia. Trabalhos recentes valorizam o refluxo em Veia Poplítea como importante fator para o desenvolvimento deste quadro clínico. OBJETIVOS: Avaliar o refluxo em segmento venoso femoropoplíteo em pacientes com úlcera varicosa. TIPO DE ESTUDO: Estudo de prevalência. MÉTODOS: Cento e quatro pacientes apresentando 118 membros inferiores com úlcera varicosa. Procedimentos: exame de ultrassonografia Doppler venosa do membro acometido, observado o refluxo no segmento venoso femoropoplíteo e diâmetro da Veia Poplítea. Variáveis: Primária: refluxo no segmento venoso femoropoplíteo. Secundária: diâmetro da Veia Poplítea. RESULTADOS: A presença de refluxo no segmento venoso femoropoplíteo foi observada em 56 (47,45%) dos 118 membros com úlcera varicosa, examinados em 104 pacientes. O diâmetro médio da Veia Poplítea foi de 1,14 cm, sendo o diâmetro médio normal da população 0,6 cm. CONCLUSÃO: O refluxo venoso no segmento venoso femoropoplíteo é um importante fator na avaliação do prognóstico destes pacientes, o aumento de diâmetro da Veia Poplítea reflete a magnitude da insuficiência venosa.
Background
Perforating vein ligation has been proposed for the treatment of chronic venous ulcers in the leg. Pubmed.org, however, showed a lack of increase in subfascial endoscopic perforator surgery (SEPS) publications, even before the popularization of perforating vein thermal or chemical ablation procedures. We renewed an investigation on perforating vein ligation surgery as part of venous ulcer treatment. The basic question was if ulcer size and number of notable perforating veins were related.
Methods
Leg perforating veins were detected by ultrasonography (US) and by clinical palpation in 118 legs of 104 subjects, mostly women (79, 76%). This group represented a sample of a mostly rural Brazilian population. Inclusion criterion was any “request for venous US at any stage of ulcer treatment.” Ulcer size in centimeters squared and number of detected perforating veins (NP) were compared using Pearson correlation coefficient p available with Excel.
Results
Average ulcer size was 13 ± 17 cm2 (1–100) for NP = 0–7, resulting in p = −0.18 for the 118 pairs of data. Subgroup averages were 16, 16, 11, 8, and 8 cm2 for NP = 0, 1, 2, 3, and ≥4 perforating veins detected (n = 32, 30, 29, 16, and 11, respectively), resulting in p = −0.94 for such averages and NP.
Conclusion
Ulcer size failed to correlate with number of detected perforating veins based on raw data but correlated inversely to such number if subgroup averages were compared. Average ulcer size was larger for subgroups of legs with lesser number of perforating veins. Arbitrary ligation of detectable perforating veins may result in ulcer size augmentation. Detailed research must continue to find criteria to indicate (a) ligation or (b) preservation of specific perforating veins either (a) detrimental or (b) contributory to venous ulcer healing.
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