Background. Stenoses are leading factors limiting dialysis vascular access patency. Both physical and haemodynamic
examinations are used in stenoses screening. To estimate potential advantage of ultrasonography as a screening
measure, we calculated both sensitivity and specificity of clinical (nephrological) diagnoses of access stenoses
compared with ultrasound.
Methods and Results. 268 examinations of 193 subjects were included into this comparison. Linear-array 7.5 MHz
ultrasound probe were used for whole-length access examination. Sensitivity of clinical examination was 35.8 %,
specificity 92.8 %. Sensitivity did not differ significantly according to the stenosis localization.
Conclusions. Ultrasound use in dialysis access screening would considerably increase the number of stenoses
diagnosed in-time. On the contrary, clinical suspicion on access stenosis is highly specific, therefore it is not
indispensable to confirm it by ultrasound.
haemodialysis, vascular access, ultrasonography.