Arterialização venosa superficial com veia safena magna in situ: a experiência de um único centro / Superficial venous arterialization with the great saphenous vein in situ: a single-center experience

Resumo Contexto A arterialização do arco venoso dorsal do pé é uma técnica indicada em casos de isquemia crítica de membros inferiores sem leito distal adequado que possibilite tratamento convencional, como revascularização, angioplastia ou tratamento clínico. Objetivos O propósito do trabalho foi apresentar o resultado da arterialização do arco venoso do pé em 16 pacientes submetidos a essa técnica. Métodos Tratou-se de um estudo analítico descritivo retrospectivo transversal, baseado na revisão de prontuários de 16 pacientes submetidos à arterialização do arco venoso dorsal do pé para salvamento de membro, entre janeiro de 2016 a janeiro de 2021. Resultados Dos 16 pacientes submetidos à arterialização do arco venoso do pé, 25% (4) evoluíram para amputação maior durante a mesma internação, e 6,25% (1) pacientes evoluíram para amputação maior após 6 meses. Os demais pacientes (68,75%, 11) tiveram seus membros preservados, sendo que 10 foram submetidos a amputações menores (pododáctilos e antepé), e 1 paciente não necessitou de procedimento adicional. Conclusões A técnica de arterialização do arco venoso dorsal do pé deve ser considerada em casos selecionados. Trata-se de uma alternativa válida para a preservação do membro na impossibilidade de tratamento convencional.

Abstract Background Arterialization of the dorsal venous arch of the foot is a technique indicated in cases of critical lower limb ischemia that do not have a distal bed that is adequate to enable conventional treatment such as revascularization, angioplasty, or clinical treatment. Objectives The purpose of this study is to present the result of arterialization of the venous arch of the foot in 16 patients who underwent treatment with this technique. Methods This is a cross-sectional retrospective descriptive analytical study based on a review of the medical records of 16 patients who underwent arterialization of the dorsal venous arch of the foot for limb salvage from January 2016 to January 2021. Results Four (25%) of the 16 patients who underwent arterialization of the venous arch of the foot underwent a major amputation during the same hospital stay and one patient (6.25%) had a major amputation within 6 months. The other 11 patients (68.75%) had their limbs preserved, with 10 undergoing minor amputations (toes and forefoot) and one patient having no additional procedures. Conclusions We conclude that the technique of arterialization of the dorsal venous arch of the foot should be considered in selected cases. It is a valid alternative for limb salvage when conventional treatment is impossible.

Techniques in Lower Extremity Reconstruction with Supermicrosurgery

PURPOSE: The concept and development of perforator free flaps have led to significant advances in microsurgery. Ongoing developments in perforator free flap surgery are aimed at reducing complications and improving surgical outcomes. The aim of this study was to evaluate the effectiveness and application of supermicrosurgery in free flap surgery. MATERIALS AND METHODS: A total of 267 patients with soft tissue defects of the lower extremity due to various etiologies from January, 2007 to January, 2013. The patients received either an anterolateral thigh free flap (n=83), a superficial circumflex iliac artery free flap (n=152), an upper medial thigh free flap (n=19), or a superior gluteal artery perforator free flap (n=13). Microanastomosis was performed using a perforator-to-perforator technique, either end-to-end or end-to-side. RESULTS: The mean postoperative follow up period was eight months (range: one to 16 months) and flap loss occurred in 11 cases out of 267. All cases of flap loss occurred within two weeks of surgery due to either arterial insufficiency (n=5) or venous congestion (n=6). CONCLUSION: Supermicrosurgery enables the selection of the most efficient perforator for microanastomosis at the defect site. It also reduces the time required for dissection of recipient vessels, and reduces the possibility of injury to major vessels. Microsurgery using a vessel of less than 1 mm has been reported to increase the risk of flap failure; however, using the most advanced surgical tools and developing experience in the technique can produce success rates similar to those found in the literature.

Utilização da safena magna in situ para arterialização do arco venoso do pé / The great saphenous vein in situ for the arterialization of the venous arch of the foot

CONTEXTO: O tratamento da isquemia crítica de membros inferiores sem leito arterial distal pode ser realizado por meio da inversão do fluxo no arco venoso do pé. OBJETIVO: O objetivo deste trabalho foi apresentar a técnica e os resultados obtidos com a arterialização do arco venoso do pé, mantendo a safena magna in situ. MÉTODOS: Dezoito pacientes, dos quais 11 com aterosclerose (AO), 6 com tromboangeíte obliterante (TO) e 1 com trombose de aneurisma de artéria poplítea (TA) foram submetidos ao método. A safena magna in situ foi anastomosada à melhor artéria doadora. O fluxo arterial derivado para o sistema venoso progride por meio da veia cujas válvulas são destruídas. As colaterais da veia safena magna são ligadas desde a anastomose até o maléolo medial, a partir do qual são preservadas. RESULTADOS: Dos pacientes, 10 (55,6 por cento) mantiveram suas extremidades, 5 com AO e 5 com TO; 7 (38,9 por cento) foram amputados, 5 com AO, 1 com TO e 1 com Ta; houve 1 óbito (5,5 por cento). CONCLUSÃO: A inversão do fluxo arterial no sistema venoso do pé deve ser considerada para salvamento de extremidade com isquemia crítica sem leito arterial distal.

BACKGROUND: Critical lower limb ischemia in the absence of a distal arterial bed can be treated by arterialization of the venous arch of the foot. OBJETIVE: The objective of this paper was to present the technique and the results of the arterialization of the venous arch of the foot with the in situ great saphenous vein. METHODS: Eighteen patients, 11 with atherosclerosis (AO), 6 with thromboangiitis obliterans (TO) and 1 with popliteal artery aneurysm thrombosis were submitted to venous arch arterialization. The in situ great saphenous vein was anastomosed to the best donor artery. Arterial flow derived from the venous system progresses through the vein whose valves were destroyed. The collateral vessels of the great saphenous vein are linked from the anastomosis to the medial malleolus and preserved from this point onward. RESULTS: Limb salvage was achieved in 10 (55.6 percent) patients, 5 with AO and 5 with TO. Seven (38.9 percent) patients were amputated, 5 with AO, 1 with TO and 1 with Ta. One (5.5 percent) patient died. CONCLUSION: Arterialization of the venous system of the foot should be considered for the salvage of limbs with critical ischemia in the absence of a distal arterial bed.

Arterialización venosa temporal del pie diabético / Temporal venous arterialization of the diabetic foot

La primera idea que tuvieron los cirujanos (1902) para evitar amputaciones por isquemia fue la de desviar el flujo arterial al sistema venoso por intermedio de una fístula arteriovenosa entre vasos adyacentes, pero con resultados inciertos. Desde entonces se han inventado las simpatecomias, las endarteriectomias y los injertos puentes o bypass y, últimamente, otros avances médicos, quirúrgicos y endovasculares. Sin embargo, en el mundo se siguen haciendo amputaciones, sobre todo en diabéticos. La arterialización de las venas del pie, basada en la vieja idea de la circulación invertida, constituye una esperanza más para estos pacientes ya condenados a la pérdida del miembro. Objetivo: Demostrar que la arterialización de las venas del pie en diabéticos con lesiones neuroisquémicas, generalmente infectadas (pie diabético), es un método eficaz y durable, aunque el puente solo funcione temporalmente. Pacientes y método: De enero de 2000 a febrero de 2009, 59 pacientes con pie diabético fueron tratados por arterialización de las venas del pie...

The first idea of surgeons (1902) to avoid amputations due to ischemia was to deviate the arterial flow to the venous system using an arteriovenous fistula between adjacent vessels; however, the results were unreliable. Since then, sympathectomies, endarterectomies and bypasses have been created, and more recently, other medical, surgical, and endovascular advances have been used. However, amputations continue to be performed worldwide mainly in diabetic patients. The arterialization of the foot veins, based on the old idea of inverted blood flow, is a new possibility for these patients who, otherwise, could lose their limbs. Objective: To demonstrate that arterialization of the foot veins in diabetic patients with neuroischemic lesions, usually infected (diabetic foot), is an effective and long-lasting method, even though the bypass only works temporally. Patients and method: From January 2000 to February 2009, 59 patients with diabetic foot were threated by means of arterialization of the foot veins. An early death was not included in the analysis. Of the 58 remaining patients, 44 were male and 14 were female. Their mean age was 71 years old: (53-91 years). Fifty-four of them were classified as being Fontaine IV and four were IIIB...