Jornal Vascular Brasileiro
https://jvascbras.org/article/doi/10.1590/S1677-54492012000400009
Jornal Vascular Brasileiro
Artigo Original

Efeitos imediatos do eletrocautério endovascular em varizes de membros inferiores

Immediate effects of endovascular electrocauterization in lower limb varicose veins

Fabio Henrique Rossi; Camila Baumann Beteli; Mabel Barros Zamorano; Lilian Mary da Silva; Patrik Bastos Metzger; Cybelle Bossolani Onofre; Edir Branzoni Leal; Akash Kuzhiparambil Prakasan; João Italo Dias França; Nilo Mitsuru Izukawa; Amanda Rego Souza

http://dx.doi.org/10.1590/S1677-54492012000400009 J Vasc Bras, vol.11, n4, p.305-309, 2012
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Resumo

OBJETIVOS: Determinar a importância das variáveis: Intensidade de Energia (I), Potência (P) e Tempo de Aplicação (T) nas alterações histológicas ocorridas em varizes de membros inferiores submetidas à eletrocauterização endovascular. MÉTODO: Estudo prospectivo experimental realizado em pacientes submetidos à eletrocauterização endovenosa de fragmento proximal da veia safena magna, de acordo com uma tabela de aleatorização - GI: I=0J, P=0W, T=15s; GII: I=300J, P=60W, T=5s; GIII: I=600J, P=60W, T=10s; GIV: I=900J, P=60W, T=15s; GV: I=450J, P=90W, T=5s; GVI: I=900J, P=90W, T=10s; GVII: I=1350J, P=90W, T=15s; GVIII: I=600J, P=120W, T=5s; GIX: I=1200J, P=120W, T=10s; GX: I=1800J, P=120W, T=15s. Os fragmentos foram submetidos a estudo anatomopatológico com o objetivo de analisar a profundidade das alterações tissulares, assim classificadas: Grupo A - endotélio e média, Grupo B - endotélio, média e adventícia. RESULTADOS: A intensidade das alterações histológicas - Grupo A e B - ocorridas nos fragmentos foram proporcionais à Intensidade de Energia de eletrocauterização (p=0,0001). Essa associação linear também pode ser verificada para as variáveis Potência (p=0,017) e Tempo de Aplicação (p=0,0001). O índice de correlação de Spearman foi maior para variável Tempo de Aplicação: 0,42269 (p=0,002) quando comparada com a variável Potência de Energia: 0,3542 (p=0,005). CONCLUSÃO: O Tempo de Aplicação de Energia é mais importante do que a Potência de Energia utilizada para uma mesma energia de eletrocauterização, na determinação da profundidade dos efeitos histológicos observados na parede das varizes de membros inferiores.

Palavras-chave

varizes, procedimentos endovasculares, ablação por cateter

Abstract

OBJECTIVE: To determine the importance of the variables: Energy Intensity (I), Power (P) and Time of Application (T) in the histological changes occurring in lower limb varicose vein submitted to endovascular electrocauterization. METHOD: Prospective experimental study conducted in patients undergoing great saphenous vein electrocauterization according to a randomization table - GI: I=0J, P=0W, T=15s; GII: I=300J, P=60W, T=5s; GIII: I=600, P=60W, T=10s; GIV: I=900J, P=60W, T=15s; GV: I=450J, P=90W, T=5s; GVI: I=900J, P=90W, T=10s; GVII: I=1350W, P=90W, T=15s; GVIII: I=600, P=120W, T=5s; GIX: I=1200J, P=120W, T=10s; GX: I=1800J, P=120W, T=15s. The fragments were submitted to histopathological examination in order to analyze the depth of tissue changes, classified as follows: Group A - endothelium and media; Group B - endothelium, media and adventitia. RESULTS: The intensity of histological changes - Groups A and B - that occur in the fragments were proportional to Energy Intensity of electrocauterization (p=0.0001), Power (p=0.017) and Time of Application (p=0.0001). The Spearman correlation coefficient was more powerful for the variable Time of Application: 0.42269 (p=0.002) when compared with the variable Power of Energy (P): 0.3542 (p=0.005). CONCLUSION: Time of Application of Energy is a stronger predictor than the Power of Energy in determining the depth of the histological effects observed in the wall of the varicose vein submitted to electrocauterization.

Keywords

varicose veins, endovascular procedures, catheter ablation

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