Rate of Arteriovenous Fistula Stenosis and Access Recirculation among Individuals Receiving Maintenance Hemodialysis

Abstract

Background: Arteriovenous fistula stenosis and access recirculation in hemodialysis represent critical challenges, influencing the efficiency of vascular access and dialysis treatment outcomes. Objective: The objective is to assess the prevalence of arteriovenous fistula (the AVF) stenosis as well as access recirculation (AR) in patients of hemodialysis. Study Design: Cross sectional study. Settings: Department of Nephrology, Bolan Medical Complex Hospital, Quetta. Duration: From 1st April 2022 to 1^st September, 2022. Methods: Adult patients having age 18 years to 80 years receiving maintenance hemodialysis 3 times in a week were included in this study. Patients who were willing to provide informed consent participated in the study. Patients with active infections or sepsis, with a history of vascular access interventions within the last three months, pregnant or lactating women as well as patients with cognitive impairment were excluded from study. Outcome variables will be incidence of AVF Stenosis which was determined by regular ultrasound assessments and monitoring of clinical symptoms. Statistical analyses were performed using SPS version 22. Results: The study comprised 150 maintenance hemodialysis patients with a mean age of 55±10. Age distribution showed that 20% were between 18-40 years, 53.3% between 41-60 years, 23.3% between 61-80 years, and 3.3% were older than 80 years. Sixty percent (60%) of the participants were male, while 40% were female. The mean duration of AV fistula use was 3.21± 2.65 years, with 14.66% having duration of 6-12 months, 41.33% between 1-3 years, and 44% using AV fistulas for more than 3 years. Seventy-five point three percent (75.3%) of patients had hypertension, 40.0% had diabetes mellitus, and 28.0% had cardiovascular disease. Additionally, 16.7% of patients presented with other comorbidities. Out of total 25 (16.7%) patients were affected by arteriovenous fistula (AVF) stenosis, while access recirculation was observed in 20 patients (13.3%). Conclusion: In conclusion, our study reveals a notable incidence of arteriovenous fistula (AVF) stenosis and access recirculation among maintenance hemodialysis patients. The observed associations with age and AVF duration underscore the complexity of vascular access complications.