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1.
Radiol. bras ; 41(4): 213-217, jul.-ago. 2008. ilus
Article in English, Portuguese | LILACS | ID: lil-492325

ABSTRACT

OBJETIVO: Este estudo tem como objetivo a avaliação pós-operatória do tratamento endovascular de aneurismas da aorta abdominal por angiotomografia com multidetectores. MATERIAIS E MÉTODOS: Foram analisadas, retrospectivamente, angiotomografias de 166 pacientes (137 homens e 29 mulheres) com idade média de 73 anos portadores de aneurisma da aorta abdominal submetidos a terapêutica endovascular, no período de junho de 2005 a agosto de 2006. Os exames foram feitos em tomógrafo multidetector de 64 canais e os parâmetros adotados foram: colimação, 0,625 mm; pitch, 0,6-1; mAs, 300-400; kV, 120. Em todos os casos foi utilizado meio de contraste iodado não-iônico (350 mg/ml) administrado por meio de bomba infusora, com fluxo de 4 ml/s a 5 ml/s e com volume variável de 70 ml a 100 ml. Os exames foram avaliados quanto à presença de complicações. RESULTADOS: Dos 166 exames realizados, 93 pacientes não apresentaram complicações e 73 apresentaram os seguintes achados: endoleak (n=37), trombose circunferencial da endoprótese (n=29), angulação (n=17), coleção no sítio de punção (n=10), migração da prótese (n=7), dissecção dos vasos de acesso (n=7) e oclusão (n=6). CONCLUSÃO: O endoleak foi a complicação mais prevalente em nosso estudo, sendo o tipo II o mais comum.


OBJECTIVE: The present study was aimed at evaluating endovascularly treated abdominal aortic aneurysms by multidetector computed tomography angiography. MATERIALS AND METHODS: Multidetector computed tomography angiography studies of 166 patients were retrospectively analyzed. The sample included 137 men and 29 women with mean age of 73 years who had undergone endovascular treatment for abdominal aortic aneurysm in the period between June 2005 and August 2006. Images were acquired in a 64-channel multidetector tomograph adopting the following parameters: 0.625 mm collimation, pitch 0.6-1, 300-400 mAs, and 120 kV. A nonionic iodinated contrast agent (350 mg/ml) was injected by infusion pump at a rate of 4 ml/s to 5 ml/s and a variable amount of 70 ml to 100 ml. The studies were evaluated for the presence of complications. RESULTS: Among the 166 cases, 93 patients did not present complications and 73 presented the following findings: endoleak (n=37), circumferential thrombosis (n =29), angulation (n=17), presence of collection at the puncture site (n=10), graft migration (n=7), dissection of access vessels (n=7) and occlusion (n=6). CONCLUSION: In summary, endoleak was the most prevalent complication in the present series, with type II endoleak being most frequently found.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged, 80 and over , Aortic Aneurysm, Abdominal , Aortic Aneurysm, Abdominal/surgery , Aortic Aneurysm, Abdominal/diagnosis , Postoperative Complications , Aortic Aneurysm, Abdominal/etiology , Brazil , Evaluation of Results of Therapeutic Interventions , Retrospective Studies , Tomography, X-Ray Computed
2.
J Endovasc Ther ; 12(1): 35-45, 2005 Feb.
Article in English | MEDLINE | ID: mdl-15701039

ABSTRACT

PURPOSE: To report a long-term experience with the Talent Endoprosthesis for the treatment of abdominal aortic aneurysm (AAA). METHODS: In the period between June 1997 and June 2003, 193 patients (171 men; mean age 71.0+/-7.8 years, range 52-89) with AAA were treated with a Talent Endoprosthesis. Patients were clinically and radiologically followed in the postoperative period, at 30 days, and then annually up to 72 months. In addition to computed tomographic scans, a plain abdominal radiogram was also performed annually for structural assessment of the stent-graft. RESULTS: Implantation success was 99.0% (191/193). Delivery system introduction was the cause of 1 failure, and the other patient was converted to surgery for intraprocedural device migration. There were 10 (5.2%) endoleaks (3 type I, 7 type II) at 30 days; all type I and 3/7 type II endoleaks were treated (93.3% secondary clinical success). Seven (3.7%) patients died in the perioperative period, including the conversion. During follow-up, 18 (9.3%) additional deaths occurred, and 4 new endoleaks (1 type I, 2 type II, 1 type III) were encountered. In up to 6 years' follow-up, the Talent Endoprosthesis did not present signs of material fatigue, but 1 component disconnection at 42 months led to death. There was no aneurysm rupture. After an initial increase in the aortic neck (1.2+/-1.1 mm) in the postoperative period, the neck diameters continued to increase until after the third year. An average reduction of 5.6+/-4.1 mm in the aneurysm diameter at 1 year was noted; the reduction gradually reached 14.1+/-10.7 mm after 60 months. CONCLUSIONS: The Talent Endoprosthesis was an efficient alternative for managing AAAs, achieving low morbidity and mortality rates and a good long-term clinical outcome in this study. The Talent Endoprosthesis did not present signs of material fatigue over a 6-year follow-up.


Subject(s)
Aortic Aneurysm, Abdominal/diagnostic imaging , Aortic Aneurysm, Abdominal/surgery , Blood Vessel Prosthesis Implantation/methods , Stents , Aged , Aged, 80 and over , Aortic Aneurysm, Abdominal/mortality , Aortography/methods , Cohort Studies , Female , Follow-Up Studies , Humans , Male , Middle Aged , Postoperative Complications , Prosthesis Design , Retrospective Studies , Risk Assessment , Severity of Illness Index , Survival Rate , Treatment Outcome
3.
Rev. bras. cir. cardiovasc ; 17(4): 323-330, Oct.-Dec. 2002. ilus, graf
Article in English | LILACS | ID: lil-365504

ABSTRACT

OBJETIVOS: Este trabalho visa comparar a acurácia da tomografia computadorizada e da angiografia para avaliar os aneurismas de aorta abdominal (AAA) para posterior implante de endoprótese vascular. MÉTODO: De junho de 1997 até março de 2001, foram atendidos 113 pacientes portadores de AAA, tendo sido submetidos a estudo por tomografia helicoidal computadorizada de abdome e pelve e angiografia com cateter centimetrado do eixo arterial aorto-ilíaco. A idade dos pacientes variou entre 51 e 88 anos (S:69a.), sendo 104 do sexo masculino e nove do feminino. RESULTADOS: Quando comparadas as médias dos diâmetros aferidas pela tomografia computadorizada e pela angiografia, notou-se que a diferença do diâmetro foi significativa para o colo aórtico infra-renal (r < 0,05) e muito significativa para o diâmetro máximo dos aneurismas aórticos (r < 0,001). Näo existiu diferença estatística entre a medida do diâmetro das artérias ilíacas (r > 0,05). Quando comparadas as médias das extensöes aferidas pela tomografia computadorizada e pela angiografia, notou-se que a diferença das extensöes foi significativa para o colo aórtico infra-renal (r < 0,05), para a distância entre a artéria renal e a bifurcaçäo aórtica (r < 0,05) e para as artérias ilíacas comuns (r < 0,05). A comparaçäo entre as médias também foi significativa para a extensäo entre a artéria renal e a artéria ilíaca interna (r < 0,05). CONCLUSÕES: Na avaliaçäo por imagem dos AAA houve diferenças estatísticas significativas entre os dois métodos diagnósticos. A tomografia computadorizada aparentou ser o melhor método pré-operatório para a medida dos diâmetros, e a angiografia por cateter centimetrado para a avaliaçäo das extensöes (comprimentos). Portanto, os dois métodos se complementam, devendo ser realizados na avaliaçäo de todos os pacientes candidatos ao implante de uma endoprótese aórtica.


Subject(s)
Humans , Male , Female , Adult , Aged , Angiography , Aortic Aneurysm, Abdominal , Blood Vessel Prosthesis , Tomography, X-Ray Computed , Magnetic Resonance Spectroscopy
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