Effects of electrocautery to provoke endovascular thermal injury

Abstract

PuRPOsE: To investigate the effects of a new electrocautery device to provoke endovascular venous thermal injury. METHOds: An experimental endovascular electrocautery was placed inside eight ex-vivo bovine saphenous veins models. Each one was divided in eight segments and progressive intensities of electric energy liberated. The macroscopic and microscopic effects were analyzed. REsuLTs: Forty bovine saphenous veins segments were studied. The higher the electric energy applied the greater the nuclear picnosis and more intense the cytoplasmatic shrinkage and electrocoagulation effects. CONCLusION:The experimental endovascular electrocautery device demonstrated to be both capable of inducing the destruction of the intimal layers of the studied vein model and provoke endovascular thermal injury. Key words: Varicose Veins. Endovascular Procedures. Therapeutics. Electrocoagulation. REsuMO OBJETIVO: Investigar os efeitos de um modelo experimental de eletrocautério em provocar lesão venosa térmica endovascular. MéTOdOs: O eletrocautério endovascular foi colocado dentro de oito modelos experimentais de veia safena bovina. Cada uma foi dividida em oito segmentos e intensidades progressivas de energia elétrica liberada. Os efeitos macroscópicos e microscópicos foram analisados. REsuLTAdOs: Foram estudados quarenta segmentos de veia safena bovina. Quanto maior a energia elétrica aplicada pelo eletrocauterizador endovascular maiores foram as alteraçoes de picnose nuclear e mais intensa a retração citoplasmática observada. CONCLusãO: O eletrocautério endovascular experimental demonstrou ser capaz de induzir a destruição da camada íntima e provocar lesão térmica endovascular. descritores: Varizes. Procedimentos Endovasculares. Terapêutica. Eletrocoagulação. -Acta Cirúrgica Brasileira -Vol. 26 (5) 2011Rossi FH et al.

Periprosthetic proximal medial femoral cortical destruction caused by a femoral arterial pseudoaneurysm

“…In minor injuries, the onset of clinical presentation is delayed, manifesting with swelling, pain, and anemia in general. 11 In a study by Garrido-Gómez et al, it was suggested that severe bleeding may occur in the postoperative period. It was shown that small pseudoaneurysms can undergo spontaneous thrombosis within 4 weeks.…”

Efeitos imediatos do eletrocautério endovascular em varizes de membros inferiores

“…9,10 In a recent study, we demonstrated that electrocauterization can cause selective destruction of a blood vessel. 7 Some studies have demonstrated the possibility of applying electrical energy to treat varicose veins of the lower limbs in the past, but inconclusive results and the lack of skills in catheterization of blood vessels by past vascular surgeons have discouraged clinical application. [11][12][13][14][15][16] Today, with the paradigm shift in forms of treatment and a better understanding of the advantages and disadvantages of endovascular treatment of varicose veins of the lower limbs, electrocauterization can become an alternative method, and perhaps an advantageous therapeutic modality.…”

“…The electrocauterization Intensity of Energy in Joules depends on the Power in Watts and the Time of its application in seconds. We know that the degree of destruction of the walls of a vessel is proportional to the Energy Intensity, 7 but did not know if this was true for the Power and Time of Application, and which of these two variables had greater power to determine the degree of destruction of the wall in a vessel.…”

“…Endovascular electrocauterization can cause selective destruction of the layers of a vein. 7 This effect is proportional to the energy used which, in turn, is dependent on the Power and Time of Application.…”

Estudo randomizado duplo-cego comparativo entre eletrocoagulação e radiofrequência no tratamento de pacientes portadores de insuficiência de veia safena magna e varizes dos membros inferiores

“…O desenvolvimento de um modelo de eletrocoagulador na Bioengenharia do IDPC permitiu a retomada desta técnica, a partir de estudos experimental e de biossegurança 43,44,45 . Contudo, uma pesquisa clínica mostrou-se necessária para estabelecer a eficácia da EC, bem como a sua capacidade de promover benefício aos pacientes, especialmente em comparação a um tratamento já estabelecido como a RF.…”