RESUMO
OBJECTIVE: To investigate the significance of inflow artery and cephalic vein diameters on predicting patency of radiocephalic and brachiocephalic arteriovenous fistulas (AVFs). DESIGN: Single centre study with retrospective analysis of prospectively collected data between November 2010 and July 2015. METHODS: A detailed history and physical examination was undertaken, including age, gender, history and duration of haemodialysis, cause of chronic kidney disease, and the presence of comorbidities/risk factors. Pre-operative arterial and venous upper extremity mapping was performed and inner vessel diameter was recorded, using a tourniquet for the veins. Outcome measures included AVF use (functionality), primary, primary assisted, secondary, and functional secondary patency. RESULTS: One hundred and thirty five AVFs (57 and 78 radiocephalic and brachiocephalic AVFs, respectively) were constructed and followed up for 5 years. A cephalic vein diameter <4.3 mm (lower three quartiles) was the single independent predictor of inferior secondary and also functional secondary patency of radiocephalic AVFs (p = .02, HR 11.2, 95% CI 1.44-90.9). A brachial artery diameter ≤4.1 mm (lowest quartile) was an independent predictor of AVF functionality (57% vs. 83% for larger arteries, p = .017), and inferior primary, primary assisted, secondary, and functional secondary patency of brachiocephalic AVFs (primary assisted patency 21.9% vs. 55.9% at 3 years, p = .001/log-rank test, HR 3.1, p = .002/Cox regression). The presence of lower extremity PAD or use of dual antithrombotics was also independently associated with an inferior secondary patency. The number of risk factors (brachial artery diameter ≤4.1 mm, PAD, and use of dual antithrombotics) demonstrated risk stratification capabilities for functional secondary patency. CONCLUSIONS: Among patients undergoing radiocephalic AVFs, a tourniquet derived cephalic vein diameter <4.3 mm was the single independent predictor of inferior secondary and functional secondary patency. Among patients undergoing brachiocephalic AVFs, all patency rates were inferior in the presence of a brachial artery diameter ≤4.1 mm and secondary patency was inferior in the presence of multiple risk factors.
Assuntos
Derivação Arteriovenosa Cirúrgica , Artéria Braquial/cirurgia , Artéria Radial/cirurgia , Diálise Renal , Torniquetes , Extremidade Superior/irrigação sanguínea , Veias/cirurgia , Idoso , Derivação Arteriovenosa Cirúrgica/efeitos adversos , Velocidade do Fluxo Sanguíneo , Artéria Braquial/diagnóstico por imagem , Artéria Braquial/fisiopatologia , Distribuição de Qui-Quadrado , Feminino , Oclusão de Enxerto Vascular/etiologia , Oclusão de Enxerto Vascular/fisiopatologia , Grécia , Humanos , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Valor Preditivo dos Testes , Modelos de Riscos Proporcionais , Artéria Radial/diagnóstico por imagem , Artéria Radial/fisiopatologia , Fluxo Sanguíneo Regional , Estudos Retrospectivos , Fatores de Risco , Fatores de Tempo , Resultado do Tratamento , Grau de Desobstrução Vascular , Veias/diagnóstico por imagem , Veias/fisiopatologiaRESUMO
OBJECTIVES: To compare management strategies for secondary abdominal arterio-enteric fistulas (AEFs). METHODS: This study is a review and pooled data analysis. Medline and Scopus databases were searched for studies published between 1999 and 2015. Particular emphasis was given to short- and long-term outcomes in relation to AEF repair type. RESULTS: Two hundred and sixteen publications were retrieved, reporting on 823 patients. In-hospital mortality was 30.7%. Open surgery had higher in-hospital mortality (246/725, 33.9%), than endovascular methods (7/98, 7.1%, p < .001, OR 6.7, 95% CI 3-14.7, including staged endovascular to open surgery, 0/13, 0%). In-hospital mortality after graft removal/extra-anatomical bypass grafting was 31.2% (66/226), graft removal/in situ repair 34% (137/403), primary closure of the arterial defect 62.5% (10/16), and for miscellaneous open procedures 41.3% (33/80), p = .019. Among the subgroups of in situ repair, homografts were associated with a higher mortality than impregnated prosthetic grafts (p = .047). There was no difference in recurrent AEF-free rates between open and endovascular procedures. Extra-anatomical bypass/graft removal and in situ repair had a lower AEF recurrence rate than primary closure and homografts. Late sepsis occurred more often after endovascular surgery (2-year rates 42% vs. 19% for open, p = .001). The early survival benefit of endovascular surgery was blunted during follow-up, although it remained significant (p < .001). Within the in situ repair group, impregnated prosthetic grafts were associated with the worst overall and AEF related mortality free rates and vein grafts with the best. No recurrence, sepsis, or mortality was reported following staged endograft placement to open repair after a mean follow-up of 16.8 months (p = .18, p = .22, and p = .006, respectively, compared with patients in other groups). CONCLUSIONS: Endovascular surgery, where appropriate, is associated with better early survival than open surgery for secondary AEFs. Most of this benefit is lost during long-term follow-up, implying that a staged approach with early conversion to in situ vein grafting may achieve the best results in selected patients.
Assuntos
Doenças da Aorta/cirurgia , Implante de Prótese Vascular/métodos , Procedimentos Endovasculares/métodos , Fístula Intestinal/cirurgia , Fístula Vascular/cirurgia , Veias/transplante , Idoso , Idoso de 80 Anos ou mais , Doenças da Aorta/diagnóstico por imagem , Doenças da Aorta/mortalidade , Implante de Prótese Vascular/efeitos adversos , Implante de Prótese Vascular/mortalidade , Distribuição de Qui-Quadrado , Intervalo Livre de Doença , Procedimentos Endovasculares/efeitos adversos , Procedimentos Endovasculares/mortalidade , Feminino , Mortalidade Hospitalar , Humanos , Fístula Intestinal/diagnóstico por imagem , Fístula Intestinal/mortalidade , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Razão de Chances , Complicações Pós-Operatórias/etiologia , Modelos de Riscos Proporcionais , Recidiva , Medição de Risco , Fatores de Risco , Fatores de Tempo , Resultado do Tratamento , Fístula Vascular/diagnóstico por imagem , Fístula Vascular/mortalidadeRESUMO
OBJECTIVE: Recent studies with asymptomatic carotid patients on best medical management have shown that the annual risk of stroke has decreased to approximately 1%. There is no evidence that a similar decrease in mortality has occurred. In addition, the intensity of statin therapy for these patients has not yet been determined. The aims of this review were to determine (a) the reported long-term all-cause and cardiac-related mortality in patients with asymptomatic carotid stenosis (ACS) > 50%, (b) whether there has been a decrease in mortality in recent years, (c) the available methods of mortality risk stratification, and (d) whether the latest ACC/AHA guidelines on the treatment of serum lipids can be applied to this group of patients. METHODS: Systematic review of PubMed, EuroPubMed, and Cochrane Library and meta-analysis using random effects for pooled proportions were performed regarding long-term all-cause and cardiac-related mortality and the associated risk factors in ACS patients. The last day for literature search was October 30, 2014. RESULTS: Seventeen studies were retrieved reporting 5-year all-cause mortality in 11,391 patients with ACS >50%. The 5-year cumulative all-cause mortality across all 17 studies was 23.6% (95% CI 20.50-26.80). Twelve additional studies, reporting both all-cause and cardiac mortality with a minimum of 2 year follow-up and involving 4,072 patients were identified. Of the 930 deaths reported, 589 (62.9%; 95% CI 58.81-66.89) were cardiac-related. This translates into an average cardiac-related mortality of 2.9% per year. CONCLUSIONS: All-cause and cardiac mortality in ACS patients are very high. Although risk stratification is possible, most patients are classified as high risk. In view of this high risk, aggressive statin therapy is indicated if the new ACC/AHA guidelines on serum lipids are to be adhered to.
Assuntos
Doenças Assintomáticas , Estenose das Carótidas/tratamento farmacológico , Estenose das Carótidas/mortalidade , Inibidores de Hidroximetilglutaril-CoA Redutases/uso terapêutico , Causas de Morte , Humanos , Medição de Risco , Fatores de TempoRESUMO
OBJECTIVES: The aim was to perform a review of the efficacy and safety of new oral anticoagulants (NOAs) in the management of venous thromboembolism (VTE). METHODS: This was a systematic review and meta-analysis. On March 26, 2014, Medline, Embase, and the Cochrane trial register were searched for randomized controlled trials (RCTs) comparing the NOAs dabigatran, rivaroxaban, apixaban, and edoxaban with vitamin K antagonists (VKAs) in VTE treatment and secondary prevention. Two investigators assessed the methodological quality of the RCTs. The main study outcomes (efficacy, safety and net clinical benefit) were expressed as risk ratios (RR) with 95% confidence interval (CI). RESULTS: Ten RCTs, mostly with low risk of bias, with nearly 38,000 patients, were identified. In six trials of treatment, NOAs were equally effective as VKAs in preventing recurrent symptomatic VTE (RR 0.89, 95% CI 0.75-1.05), but major bleeding occurred less often (1.08% vs. 1.73% for VKAs, RR 0.63, 95% CI 0.51-0.77), leading net clinical benefit to favor NOAs (RR 0.79, 95% CI 0.70-0.90). Fatal bleeding occurred less often with NOAs (0.09% vs. 0.18% for VKAs), a difference that approached statistical significance (RR 0.51, 95% CI 0.26-1.01). In three secondary prevention trials, NOAs reduced VTE recurrence rates to 1.32% (vs. 7.24% with placebo, RR 0.17, 95% CI 0.12-0.24) and fatal pulmonary embolism (PE) (including unexplained deaths) to 0.1% (vs. 0.29% for placebo, RR 0.37, 95% CI 0.10-1.38) at the expense of clinically relevant non-major bleeding (4.3% vs. 1.8% for placebo, RR 2.32, 95% CI 1.65-3.35), but not major bleeding. All-cause mortality rate was reduced to 0.41% with NOAs (vs. 0.86% with placebo, RR 0.38, 95% CI 0.18-0.79). Net clinical benefit favored NOAs (RR 0.21, 95% CI 0.15-0.29), and NNT was 18. CONCLUSIONS: Compared to VKAs, NOAs are not only effective in treating VTE but also safer in terms of bleeding, thereby conferring clinical benefit. Their safety and efficacy was confirmed further in secondary prevention trials.
Assuntos
Anticoagulantes/uso terapêutico , Benzimidazóis/uso terapêutico , Morfolinas/uso terapêutico , Pirazóis/uso terapêutico , Piridinas/uso terapêutico , Piridonas/uso terapêutico , Prevenção Secundária , Tiazóis/uso terapêutico , Tiofenos/uso terapêutico , Tromboembolia Venosa/tratamento farmacológico , beta-Alanina/análogos & derivados , Administração Oral , Anticoagulantes/administração & dosagem , Benzimidazóis/administração & dosagem , Ensaios Clínicos Fase III como Assunto , Dabigatrana , Humanos , Morfolinas/administração & dosagem , Pirazóis/administração & dosagem , Piridinas/administração & dosagem , Piridonas/administração & dosagem , Rivaroxabana , Tiazóis/administração & dosagem , Tiofenos/administração & dosagem , Tromboembolia Venosa/prevenção & controle , beta-Alanina/administração & dosagem , beta-Alanina/uso terapêuticoRESUMO
There is currently a lack of information on presentation patterns and the appropriate investigation and treatment of aortic brucellosis. Herein a case affecting the iliac component of an aorto-iliac aneurysm, managed successfully with in situ graft repair, is reported. A review of the literature identified 25 cases, with the infrarenal abdominal aorta (65%) followed by the ascending thoracic aorta (23%) being mostly affected; only our case involved the iliacs. Aortic brucellosis affected mostly older men, caused pain more often than fever (in 73% and 57%, respectively), and involved frequently the spine or the aortic valve (n = 14, 56%). Preoperative diagnosis was made more often in the presence of fever (67% versus 18% in afebrile patients, P = 0.021). In situ aneurysm repair in the form of open (54%) or endovascular (8%) grafting was mostly performed. Mortality was 12% and graft infection was 13% at two years. In conclusion, aortic brucellosis has unique presentation patterns, usually affecting an abnormal or aneurysmal aorta and/or due to a contiguous spinal or aortic valve infection. Acute symptomatology with pain and/or fever occurs very often and should raise suspicion for aortic infection. Despite the seriousness of aortic involvement, mortality and reinfection rates are within acceptable levels.
Assuntos
Aneurisma Infectado/cirurgia , Aneurisma da Aorta Abdominal/cirurgia , Implante de Prótese Vascular , Brucella/patogenicidade , Brucelose/cirurgia , Aneurisma Ilíaco/cirurgia , Adulto , Idoso , Aneurisma Infectado/diagnóstico por imagem , Aneurisma Infectado/microbiologia , Antibacterianos/uso terapêutico , Aneurisma da Aorta Abdominal/diagnóstico por imagem , Aneurisma da Aorta Abdominal/microbiologia , Aortografia/métodos , Implante de Prótese Vascular/efeitos adversos , Brucelose/diagnóstico , Brucelose/microbiologia , Angiografia por Tomografia Computadorizada , Feminino , Humanos , Aneurisma Ilíaco/diagnóstico por imagem , Aneurisma Ilíaco/microbiologia , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/etiologia , Resultado do TratamentoAssuntos
Fístula Arteriovenosa , Derivação Arteriovenosa Cirúrgica , Comorbidade , Demografia , Humanos , Diálise RenalAssuntos
Doença Crônica , Veias , Estimulação Elétrica , Terapia por Estimulação Elétrica , Humanos , Doenças VascularesAssuntos
Derivação Arteriovenosa Cirúrgica , Diálise Renal , Artérias/cirurgia , Humanos , Veias/cirurgiaAssuntos
Procedimentos Endovasculares/normas , Artérias Mesentéricas/cirurgia , Veias Mesentéricas/cirurgia , Doenças Vasculares/terapia , Procedimentos Cirúrgicos Vasculares/normas , Procedimentos Endovasculares/efeitos adversos , Humanos , Artérias Mesentéricas/diagnóstico por imagem , Artérias Mesentéricas/fisiopatologia , Veias Mesentéricas/diagnóstico por imagem , Veias Mesentéricas/fisiopatologia , Valor Preditivo dos Testes , Fatores de Risco , Circulação Esplâncnica , Resultado do Tratamento , Doenças Vasculares/diagnóstico por imagem , Doenças Vasculares/fisiopatologia , Procedimentos Cirúrgicos Vasculares/efeitos adversosAssuntos
Aorta Torácica/cirurgia , Doenças da Aorta/cirurgia , Procedimentos Endovasculares , Aorta Torácica/anatomia & histologia , Doenças da Aorta/complicações , Doenças da Aorta/diagnóstico , Doenças da Aorta/epidemiologia , Procedimentos Endovasculares/efeitos adversos , Humanos , Complicações Pós-Operatórias/prevenção & controleRESUMO
OBJECTIVES: To compare aortoenteric fistula (AEF) outcome after endovascular (EV-AEFR) or open repair (O-AEFR). DESIGN: Multicentre retrospective comparative study. MATERIALS/METHODS: 25 patients with AEF (24 secondary, 23 males, median age 75 years) after aortic surgery (median four years). Preoperative sepsis was evident in 19 cases. Eight patients were managed with EV-AEFR and 17 with O-AEFR. RESULTS: The two groups were comparable in preoperative characteristics. In-hospital mortality after EV-AEFR was lower compared to O-AEFR (0% and 35%, respectively, p = 0.13). Similarly, morbidity after EV-AEFR was lower compared to O-AEFR (25% and 77%, respectively, p = 0.028). There was a trend for worse recurrence-free, sepsis-free, re-operation-free and AEF-related death-free rates after EV-AEFR, while the early survival advantage of EV-AEFR was lost after two years and the overall long-term survival rates (perioperative mortality included) of the two groups were similar. Preoperative sepsis had no effect on recurrence and sepsis-free rates (p = 0.94 and p = 0.92, respectively), but it was associated with worse two year overall survival (24% vs 50%, p = 0.32). On multivariate analysis, the number of symptoms (two vs one) at presentation was the single predictor of worse re-operation rates, AEF-related and overall survival. CONCLUSIONS: EV-AEFR was associated with no postoperative mortality in this study and can achieve satisfactory short and long-term results, comparable to O-AEFR. Further trials should focus on the role of EV-AEFR in patients at high risk for O-AEFR, due to shock or co-morbidities, or as a bridging procedure.
Assuntos
Aorta Abdominal , Doenças da Aorta/cirurgia , Fístula Intestinal/cirurgia , Stents , Fístula Vascular/cirurgia , Procedimentos Cirúrgicos Vasculares/métodos , Idoso , Idoso de 80 Anos ou mais , Doenças da Aorta/diagnóstico , Feminino , Seguimentos , Humanos , Fístula Intestinal/diagnóstico , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Tomografia Computadorizada por Raios X , Resultado do Tratamento , Fístula Vascular/diagnósticoRESUMO
OBJECTIVES: The aim of the study is to study contemporary presentation patterns and clinical results in patients undergoing aortofemoral bypass (AFB) surgery. DESIGN: This was a retrospective comparative study. MATERIAL AND METHODS: During a 14-year period, 269 consecutive patients (mean age 65 years) underwent AFB. Indications included occlusive disease with severe intermittent claudication (IC) (n = 86), critical limb ischaemia (CLI, n = 97) and aneurysmo-occlusive disease (n = 86). RESULTS: From 2000-07 on, AFB was performed more frequently for occlusive disease with CLI than for other indications (48% vs. 31% before 2000, P = 0.009) and also in women (51% vs. 32% before 2000, P = 0.003), compared to the period before 2000. Thirty-day mortality was reduced during 2000-2007 to 2.4%, compared with 4.3% during 1993-1999, although this difference was not statistically significant (P = 0.73). Morbidity did not change substantially over the study period. Predictors of 30-day mortality included indication (CLI = 4.1% vs. claudication = 1.2% (P = 0.37)) and chronic kidney disease (CKD, serum creatinine > 1.5 mg dl⻹) (11.1% vs. 2.9% in normal renal function, P = 0.07), the latter being the single predictor on multivariate analysis (hazard risk 4.2, P = 0.047). Overall 5 and 10-year assisted primary and secondary patency was 95% and 88%, and 99% and 95%, respectively. Survival at 5 and 10 years was 69% and 48%, respectively. Patient age (hazard risk 1.05, P < 0.001), CKD (hazard risk 1.79, P = 0.018) and diabetes (hazard risk 1.56, P = 0.022) were independent predictors of worse long-term survival. Long-term outcome did not change over the course of the study. CONCLUSIONS: In the contemporary era, AFB is more likely to be performed for CLI and in women than in the past. Despite these changes, perioperative mortality and morbidity remain low and long-term outcome excellent.