Acesso vascular para hemodiálise: avaliação do tipo e local anatômico em 23 unidades de diálise distribuídas em sete estados brasileiros

Health insurance provider and endovascular treatment availability are associated with different hemodialysis vascular access profiles: A Brazilian national survey

In Brazil, most hemodialysis (HD) patients are treated by the country's public health system. However, accessibility to healthcare is different for public and private patients. This study aimed to identify the profile of vascular access in a Brazilian HD sample. Additionally, it aimed to examine the influence of public and private health insurance, accessibility to endovascular treatments, and timely arteriovenous access creation on the prevalence of tunneled catheters (TCs), non-tunneled catheters (NTCs), and arteriovenous (AV) access. We conducted a cross-sectional electronic survey across 834 centers. Centers were inquired about the number of patients with public and private health insurance, the profiles of vascular access, time for AV access creation, accessibility to TC insertion and endovascular treatments, and the availability of peritoneal dialysis and kidney transplantation. Logistic regression and multilevel logistic regression were performed to evaluate possible interactions between the independent variables. A total of 7,973 patients across 47 HD centers were included in the survey. Public health patients accounted for 77% of the study sample. The overall vascular access profiles of the public and private insurance groups were significantly different (p < 0.001). For patients with public health insurance, the prevalence of any catheter was 25%, while that for private patients was 31.8% (p < 0.001). The prevalence of TCs was more common in private patients (15.3% vs. 23.1%, p < 0.001). AV accesses were more common in public health patients (75% vs. 68.2%, p < 0.001), as were fistulas (72.4% vs. 63.1%, p < 0.001). AV grafts were more prevalent among patients with private insurance (2.6 vs. 5.1%, p < 0.001). The availability of endovascular treatments increased the chance of having a TC by 2.3-fold (OR = 2.33, 95% CI = 1.30-4.18); however, it did not reduce the chance of having any catheter. A high chance of having a catheter was found when the time to AV access creation exceeded 60 days. The differences between public and private patients may be explained by underpayments and the decreased accessibility to care infrastructure in the public system, especially for endovascular treatments. In this sample, public health patients had a decreased risk of having a TC over an NTC. Differences in care accessibility and insurance type might influence the type of vascular access.

Influência do diabetes mellitus sobre a perviedade da fístula arteriovenosa para hemodiálise

ResumoContextoA incapacidade das fístulas arteriovenosas (FAVs) atenderem aos quesitos mínimos para realização da hemodiálise (HD) corresponde a uma das maiores causas de morbidade nos pacientes em terapia renal substitutiva. Identificar os fatores de risco associados com a falência do acesso vascular é fundamental para o manejo e sucesso da terapia hemodialítica.ObjetivoComparar o tempo médio de patência e a sobrevida das fístulas arteriovenosas realizadas nos pacientes portadores de diabetes mellitus com pacientes não portadores de diabetes mellitus (DM) em HD.MétodosTrata-se de um estudo retrospectivo observacional, no qual foram observados os prontuários médicos de todos os pacientes em HD no Hospital Santa Casa de Misericórdia de Ponta Grossa, no período de fevereiro de 2014. Foram analisados dados clínicos referentes à confecção, manutenção e utilização das FAVs como adjuvante na terapia dialítica, comparando o tempo médio de patência das fístulas em uso para HD, bem como a sobrevida das FAVs ocluídas. Os pacientes selecionados foram divididos em dois grupos para comparação, conforme a presença ou ausência de DM.ResultadosOs indivíduos do Grupo DM apresentaram maior média de idade (59,97 ± 10,12), menor tempo de acompanhamento no serviço de hemodiálise (25,42 ± 21,03 meses), menor tempo médio até a oclusão da fístula arteriovenosa (9,03 ± 11,60 meses) e menor média de sobrevida dos acessos vasculares em 24 meses (50,25%).ConclusõesO estudo concluiu que para os pacientes diabéticos houve um menor tempo médio da patência das FAVs e menor taxa de sobrevida dos acessos em 24 meses.

Perfil epidemiológico dos óbitos em terapia renal substitutiva e custo do tratamento

OBJETIVO: Descrever o perfil epidemiológico dos óbitos de pacientes em terapia renal substitutiva e o custo do tratamento. MÉTODOS: Estudo transversal e retrospectivo realizado com os dados da Base Nacional de Terapia Renal Substitutiva. Foram incluídos 2029 óbitos por insuficiência renal. Os dados foram analisados por inferência estatística e estatística não paramétrica. RESULTADOS: Houve maior número de óbitos entre os pacientes do sexo masculino e da raça branca. O custo do tratamento aumentou 6,7% nos gastos do estado e 45,3% no município. CONCLUSÃO: O maior número de óbitos ocorreu no sexo masculino, raça branca, variações bruscas nas taxas de mortalidade hospitalar e aumentou o custo do tratamento nos últimos três anos.

Duration of temporary catheter use for hemodialysis: an observational, prospective evaluation of renal units in Brazil

Background

For chronic hemodialysis, the ideal permanent vascular access is the arteriovenous fistula (AVF). Temporary catheters should be reserved for acute dialysis needs. The AVF is associated with lower infection rates, better clinical results, and a higher quality of life and survival when compared to temporary catheters. In Brazil, the proportion of patients with temporary catheters for more than 3 months from the beginning of therapy is used as an evaluation of the quality of renal units. The aim of this study is to evaluate factors associated with the time between the beginning of hemodialysis with temporary catheters and the placement of the first arteriovenous fistula in Brazil.

Methods

This is an observational, prospective non-concurrent study using national administrative registries of all patients financed by the public health system who began renal replacement therapy (RRT) between 2000 and 2004 in Brazil. Incident patients were eligible who had hemodialysis for the first time. Patients were excluded who: had hemodialysis reportedly started after the date of death (inconsistent database); were younger than 18 years old; had HIV; had no record of the first dialysis unit; and were dialyzed in units with less than twenty patients. To evaluate individual and renal unit factors associated with the event of interest, the frailty model was used (N = 55,589).

Results

Among the 23,824 patients (42.9%) who underwent fistula placement in the period of the study, 18.2% maintained the temporary catheter for more than three months until the fistula creation. The analysis identified five statistically significant factors associated with longer time until first fistula: higher age (Hazard-risk - HR 0.99, 95% CI 0.99-1.00); having hypertension and cardiovascular diseases (HR 0.94, 95% CI 0.9-0.98) as the cause of chronic renal disease; residing in capitals cities (HR 0.92, 95% CI 0.9-0.95) and certain regions in Brazil - South (HR 0.83, 95% CI 0.8-0.87), Midwest (HR 0.88, 95% CI 0.83-0.94), Northeast (HR 0.91, 95% CI 0.88-0.94), or North (HR 0.88, 95% CI 0.83-0.94) and the type of renal unit (public or private).

Conclusion

Monitoring the provision of arteriovenous fistulas in renal units could improve the care given to patients with end stage renal disease.