NGHIÊN CỨU MỨC ĐỘ TRƯỞNG THÀNH TRÊN SIÊU ÂM DOPPLER VÀ MỘT SỐ YẾU TỐ LIÊN QUAN CỦA THÔNG NỐI ĐỘNG TĨNH MẠCH VÙNG CẲNG TAY ĐỂ LỌC MÁU Ở BỆNH NHÂN SUY THẬN MẠN NĂM 2023-2025

Abstract

Background: The arteriovenous fistula is considered the best option worldwide of hemodialysis patients due to its low complication rate, long-term usability, and cost-effectiveness. Doppler ultrasound is the primary imaging modality for evaluating vascular access for hemodialysis, as it not only provides information on morphological criteria but also assesses both inflow and outflow. Moreover, it is a low-cost and easily accessible image too. Objectives: To describe certain Doppler ultrasound imaging characteristics and identify factors associated with the maturation of arteriovenous fistulas. Materials and methods: This study was conducted on 45 patients with indications of periodical hemodialysis due to chronic renal failure. These patients were operated to create arteriovenous fistula at forearm and examined with ultrasound at week 4-6 after operation. In cases where the fistula failed to meet any of the maturation criteria, a follow-up ultrasound evaluation was performed between 6 and 12 weeks. The study period spans from December 2023 to January 2025. Results: This study was conducted on 45 patients with an average age of 56.96, of which 60% were over 50 years old, and 57.8% were female. The diameter of the draining vein at 4-6 weeks postoperatively was 5.28±0.98mm; The blood flow rate of the draining vein at 4-6 weeks postoperatively was 673±289mL/min. The maturation rate of the arteriovenous fistula at 4-6 weeks postoperatively was 84.4%, and at 6-12 weeks postoperatively, it was 91.1%. Diabetes mellitus and heart failure were independently associated with AVF maturation with statistical. Conclusions: Ultrasound can assess the flow through arteriovenous  fistula,  detect several  early  complications which  cause abnormal fistulas and help  for management and treatment of patients.