Rashid Usman, Hammad Malik, Mudassar Mehmood, Muhammad Waseem Anwar, Amna Shahab.
Clinical utility of cavea2t2 score for assessing the survival of brachiocephalic arteriovenous fistula.
J Ayub Med Coll Abottabad Jan ;32(3):287-90.

Background: There are not many error proof clinical scores to assess the native dialysis access. CAVeA2T2 score is a recent tool in use. Objective of the study is to assess the clinical utility of CAVeA 2 T 2 scoring system in predicting the survival rate of brachiocephalic arteriovenous fistula (BC-AVF). Methods : All consecutive patients fulfilling the inclusion criteria for BC-AVF from January 2016 to January 2018 were included. According to their CAVeA 2 T 2 score they were divided into two groups (Group A: < 2 and Group B: ≥2). Cumulative primary and secondary patency survival of BC-AVF for both groups were measured. Results: A total of 112 BC-AVFs were analysed. Mean age was 42±SD 14 years (M: F =5:1). Mean CAVeA 2 T 2 score was 1.45±1.8. In terms of primary patency, there was no statistically significant difference between two groups ( p =0.074, p = 0.229 and p =0.357 at 6 weeks, 6 months and 12 months respectively). However, the difference was significant in terms of secondary patency ( p =0.002, p =0.036 and p =0.032 at 6 weeks, 6 months and 12 months respectively). On comparing the cumulative survival between two groups; a significantly low primary patency rate survival (Log Rank x 2 = 12.9, p- value = 0.001) and secondary patency rate survival (Log Rank x 2 = 7.6, p- value = 0.001) of BC-AVF was found in Group B. Conclusion: We found CAVeA 2 T 2 score an easily applicable and useful tool to assess the patency and survival of BC-AVF. Patients have a poor patency and significantly low survival rate when their CAVeA 2 T 2 score was ≥2.

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