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1.
Acta cir. bras ; 29(5): 320-327, 05/2014. tab, graf
Article in English | LILACS | ID: lil-709238

ABSTRACT

PURPOSE: The failure of small-caliber vascular grafts still means a serious problem. Concerning the early postoperative complications we aimed to investigate the hemostaseological and hemorheological aspects of this issue in a canine model. METHODS: In the Control group only anesthesia was induced. In the Grafted group under general anesthesia a 3.5-cm segment was resected unilaterally from the femoral artery and replaced with a PTFE graft (diameter: 3 mm). On the 1st-3rd-5th-7th and 14th postoperative days the skin temperature of both hind limbs was measured, and blood sampling occurred for hematological, hemostaseological and hemorheological tests. RESULTS: The skin temperature of the operated versus intact limbs did not differ. In the Grafted group leukocyte count was elevated by the 1st postoperative day, while platelet count increased over the entire follow-up period. Fibrinogen concentration rose on the 1st-5th days, activated partial thromboplastin time increased on the 3rd-7th days. Erythrocyte aggregation was enhanced significantly on the 1st-5th days. In specimens taken on the 14th day, histologically we found matured thrombus narrowing the graft lumen. CONCLUSIONS: Small-caliber PTFE graft implantation into the femoral artery caused significant changes in several hemostaseological and hemorheological parameters. However, better clarifying the factors leading to early thrombosis of these grafts needs further studies. .


Subject(s)
Animals , Dogs , Blood Coagulation/physiology , Erythrocyte Aggregation/physiology , Femoral Artery/transplantation , Models, Animal , Polytetrafluoroethylene/therapeutic use , Vascular Grafting/methods , Anastomosis, Surgical , Blood Cell Count , Blood Vessel Prosthesis , Fibrinogen/analysis , Partial Thromboplastin Time , Postoperative Complications , Postoperative Period , Prothrombin Time , Time Factors , Treatment Outcome
2.
Rev. bras. cir. cardiovasc ; 28(3): 317-324, jul.-set. 2013. ilus, tab
Article in English | LILACS | ID: lil-697216

ABSTRACT

INTRODUCTION: The descending branch of the lateral femoral circumflex artery is an option for coronary artery bypass grafting. OBJECTIVE: To evaluate the early patency and adaptation of lumen diameter using multidetector computed angiotomography. METHODS: Thirty-two patients were selected to undergo coronary artery bypass grafting using the descending branch of the lateral circumflex artery, the internal thoracic artery, and other grafts. Evaluations were carried out through high resolution computed tomography performed on the 7th and 90th postoperative day. Diameters of the descending branch of the lateral circumflex artery and the left internal thoracic artery were measured 3 cm before the distal anastomosis, in the middle portion, and 3 cm after the proximal anastomosis. Diameters were compared using paired t-test (P<0.05). RESULTS: Descending branch of the lateral femoral circumflex artery wDescending branch of the lateral femoral circumflex artery was used in 26 patients, as its use was not viable in six patients (18%). It was used as composite graft in all cases. The anterior descending branch was revascularized by the left internal thoracic artery in all cases. Patency rates of the descending branch of the lateral femoral circumflex artery were 96% and 92%, respectively. No occlusions were observed in the left internal thoracic artery (LITA) and no ischemic events were observed in the descending branch of the lateral circumflex. Descending branch of the lateral femoral circumflex artery increased the lumen diameter in the middle (P=0.001) and distal portions (P=0.006); the left internal thoracic artery (LITA) increased in the middle portion (P=0.001). CONCLUSION: Similar to the left internal thoracic artery, the descending branch of the lateral femoral circumflex artery showed high patency rate and positive luminal adaptation. This early evaluation confirms the descending branch of the lateral femoral circumflex artery as a potential alternative for grafting. Due to anatomical variations, preoperative femoral angiographic evaluation appears to be mandatory.


INTRODUÇÃO: O ramo descendente da artéria circunflexa lateral é um enxerto pouco avaliado e pode ser uma opção para a revascularização do miocárdio. OBJETIVO: Avaliar a perviabilidade e o remodelamento arterial do ramo descendente da artéria circunflexa lateral, em três meses de seguimento, por meio de angiotomografia de artérias coronárias. MÉTODOS: Foram analisados 32 pacientes submetidos à revascularização do miocárdio com ramo descendente da artéria circunflexa lateral, artéria torácica interna esquerda e outros enxertos. A avaliação foi realizada por meio da tomografia computadorizada de alta resolução, realizada no 7º e 90º dias de pós-operatório. O diâmetro do ramo descendente da artéria circunflexa lateral foi medido 3 cm antes da anastomose distal, na porção média e 3 cm após a anastomose proximal. As mesmas medidas foram realizadas para a artéria torácica interna esquerda. Os diâmetros foram comparados pelo método t de Student pareado (significância P<0,05). RESULTADOS: O ramo descendente da artéria circunflexa lateral foi adequado para a utilização em 26 pacientes. Em seis (18%) pacientes, o ramo descendente da artéria circunflexa lateral era inviável. Em todos os casos, o ramo descendente da artéria circunflexa lateral foi empregado sob a forma de enxerto composto. Todos os pacientes receberam artéria torácica interna esquerda para o ramo descendente anterior. A perviabilidade do ramo descendente da artéria circunflexa lateral foi de 96% e 92%, em 7 e 90 dias de pós-operatório, respectivamente. Não foram detectadas oclusões da artéria torácica interna esquerda. Não foram detectados sinais de espasmo do ramo descendente da artéria circunflexa lateral. O ramo descendente da artéria circunflexa lateral apresentou aumento de diâmetro nas porções média (P=0,001) e distal (P=0,006) e a artéria torácica interna esquerda, aumento na porção média (P=0,001). CONCLUSÃO: O remodelamento positivo sugere que o ramo descendente da artéria circunflexa lateral tem comportamento semelhante à artéria torácica interna esquerda e pode ser uma excelente opção para a revascularização do miocárdio com enxertos arteriais. Em virtude das variações anatômicas, estudos de pré-operatório podem auxiliar na seleção de casos.


Subject(s)
Adult , Aged , Female , Humans , Male , Middle Aged , Coronary Artery Bypass/methods , Femoral Artery/transplantation , Vascular Patency , Anastomosis, Surgical/methods , Coronary Angiography , Follow-Up Studies , Femoral Artery/anatomy & histology , Mammary Arteries/transplantation , Reproducibility of Results , Statistics, Nonparametric , Time Factors , Tomography, X-Ray Computed , Treatment Outcome
3.
Rev. sanid. mil ; 47(5): 159-64, sept.-oct. 1993. tab, ilus
Article in Spanish | LILACS | ID: lil-134956

ABSTRACT

Con el proposito de informar los resultados quirúrgicos, analizar las indicaciones, y comunicar la morbilidad y mortalidad, permeabilidad de los puentes extraanatómicos se revisó la experiencia de cinco años durante los que se realizaron 23 puentes en 20 pacientes. El 61 por ciento eran fumadores, 55 por ciento con cardiopatía isquémica, 39 por ciento diabéticos y 20 por ciento con infarto agudo del miocardio. Se indicó la operación para salvamento de una extremidad en 79 por ciento. En 13 por ciento se realizó el puente a través del agujero obturado como consecuencia de una infección inguinal. Las complicaciones en los primeros 30 días fueron: obstrucción del puente en cuatro . infección de gherida en dos, choque por sangrado del tubo digestivo alto en uno, y accidente vascular cerebral en otro. Ocurrieron dos fallecimientos, uno por sepsis y otro por infarto agudo del miocardio. Se logróel salvamemtp inmediato de la extremidad en 78 por ciento de los casos. La permeabilidad a 30 días, 1,2,3,4 y 5 años fue de 82,71,71,65,65, y 51 por ciento respectivamente. La supervivencia a 30 días, 1,2,3,4 y 5 años fue de 90,80,80,74,74 y 60 por ciento respectivamente


Subject(s)
Humans , Male , Female , Aged , Femoral Artery/surgery , Iliac Artery/surgery , Graft Occlusion, Vascular/surgery , Femoral Artery/transplantation , Iliac Artery/transplantation , Graft Occlusion, Vascular/complications
4.
Rev. argent. cir ; 63(6): 167-70, dic. 1992. ilus
Article in Spanish | LILACS | ID: lil-125129

ABSTRACT

Se presentan 15 pacientes operados con una vena safena humana conservada para el tratamiento de la arteriopatía obliterante grave de los miembros inferiores. En estos pacientes elegidos no se contaba con vena safena adecuada por cirugías previas, várices ó procesos postflebíticos; en todos los casos había un patrón arteriográfico que mostraba una salida pobre con un solo vaso que llegaba al pie e isquemia grado III ó IV de Fontaine, limitando la posibilidad de utilización de prótesis conocidas


Subject(s)
Humans , Male , Female , Aged , Arterial Occlusive Diseases/surgery , Bioprosthesis/standards , Saphenous Vein/transplantation , Popliteal Artery/surgery , Popliteal Artery/pathology , Popliteal Artery/transplantation , Femoral Artery/pathology , Femoral Artery/surgery , Femoral Artery/transplantation , Foot/blood supply , Glutaral/administration & dosage , Leg/blood supply , Reoperation
5.
Ars cvrandi ; 18(7): 83-94, ago. 1985. tab, ilus
Article in Portuguese | LILACS | ID: lil-31336

ABSTRACT

Apresentam-se experiências com a derivaçäo fêmoro-femoral cruzada e discutem indicaçöes cirúrgicas, técnica e resultados. Analisam-se os aspectos hemodinâmicos dessa derivaçäo, que considera-se cirurgia alternativa, cuja indicaçäo deve restringir-se a pacientes que manifestam isquemia intensa nos membros inferiores e näo apresentam condiçöes clínicas satisfatórias para serem submetidos a outros tipos de derivaçöes revascularizantes


Subject(s)
Adult , Middle Aged , Humans , Male , Female , Femoral Artery/transplantation , Ischemia/surgery , Perna/blood supply , Endarterectomy , Transplantation, Autologous
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