Prospective observational ultrasound study of native arterio-venous fistula for haemodialysis with venous pressure measurement using controlled compression ultrasound.

Inclusion criteria:

• Patients after creation of a native arterio-venous fistula at the cephalic vein for hemodialysis access;
• Informed consent.

Exclusion criteria:

• Former creation of a native arterio-venous fistula at the same arm;
• Known upper extremity occlusive arterial disease;
• Situation when ultrasound examination is not suitable: extreme swelling of the arm, post-operative pain, hematoma, local infections.

Patients after creation of a native arterio-venous fistula at the cephalic vein for hemodialysis access