AV Fistula

An arteriovenous fistula (AVF) is a fistulous connection between an adjacent artery and vein. Unlike an arteriovenous malformation, these are frequently acquired lesions rather than developmental abnormalities. Patients may be asymptomatic or may experience symptoms ranging from mild to fatal depending on the location of the AV Fistula. 

There are different causes of AV Fistula, as follows:

• Congenital,
• Surgically created for hemodialysis treatments,
• Pathologic processes include neoplasms, trauma, or erosion of an arterial aneurysm.

What happens during AV Fistula Doppler Test?

The aim behind conducting AVF by color Doppler ultrasound is to study low- and high-resistance flow in the supplying artery, high-velocity arterialized waveform in the draining vein, and turbulent high-velocity flow spectrum at the junction of the artery and vein. 

Instructions:

• Instruction for the preparation of AV Fistula is described by the specialists, depending on the organ and condition needed to be evaluated. 
• We ask patients to carry specialists' prescriptions. 
• Do not smoke or drink alcohol prior to the test.