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Factors Affecting Vascular Access At A Renal Service Of The University Hospital Valle De Hebron

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This retrospective study also looked at factors affecting vascular access. The study sampled 544 patients needing vascular access at a renal service of the University Hospital Valle de Hebron of Barcelona between 1 January 1985 and 31 December 1997. This long time period (13years) makes the study useful for measuring the duration of patency.
The aims of the study were clearly highlighted and were consistently referred to throughout the study. Multiple factors were taken into account such as demographic characteristics of patients, the site of VA, primary renal disease and duration of function.
Primary renal disease was categorised into: glomerular, interstitial, vascular cystic (ADPKD), or diabetic nephropathy and others. This made it …show more content…

Unlike the previous study, factors such as age, female gender, diabetes, catheter insertions before dialysis and lack of maturation process were seen as possible factors that accounted for the failure of Vascular Access.

Despite the sample size, the study cannot be representative to all populations because it was undertaken in one hospital in Barcelona; other patient demographics such as race, socioeconomic status were also not taken into consideration.

Due to the nature of the study being retrospective it was harder to control exposure and outcome.
The assessment of the patients was standardized; by using the same vascular surgeon to assess the patients needing Vascular Access. However, the study failed to not mention how the other patient data was collected thus increasing the number of confounding factors

Although statistical analysis was conducted and Confidence Intervals and P values were included the main limitation was that there were no statistical analysis performed between AV fistulas and AV grafts, this was because AV fistulas was the priority operation to perform unless other factors deemed it not possible then an AV grafts would be created instead.

The study also recognised that confounding factors like vessel diameter could also contribute to for such a high initial failure in radiocephalic fistulas but it was not directly measured. The study also failed to also take into consideration late referrals that

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