[Intra-arterial digital angiography study of hemodialysis shunts]

Area of Science:

• Vascular Surgery
• Interventional Radiology
• Nephrology

Background:

• Hemodialysis shunts are crucial for patients with end-stage renal disease.
• Vascular access complications, particularly venous stenosis, can significantly impair shunt function and longevity.
• Accurate diagnosis of these complications is essential for timely intervention.

Purpose of the Study:

• To evaluate the diagnostic utility of intraarterial digital subtraction angiography (DSA) for assessing hemodialysis shunts.
• To identify the prevalence and location of venous stenoses or occlusions in hemodialysis shunts.
• To establish recommendations for optimal diagnostic protocols.

Main Methods:

• Intraarterial digital subtraction angiography (DSA) was performed on 76 hemodialysis shunts.
• The procedure involved detailed imaging of the arterial inflow and venous outflow.
• Complications related to the DSA procedure were meticulously recorded.

Main Results:

• Intraarterial DSA demonstrated diagnostic capabilities in all 76 investigated hemodialysis shunts.
• No complications were observed during or after the DSA procedures.
• Venous stenoses or occlusions were identified in 85% of the cases.
• A significant proportion (18%) of these venous abnormalities were located in the proximal draining veins.

Conclusions:

• Intraarterial DSA is a safe and effective imaging modality for diagnosing complications in hemodialysis shunts.
• Venous outflow abnormalities are highly prevalent and frequently involve the proximal draining veins.
• Routine investigation of the venous inflow into the superior vena cava is recommended in all hemodialysis shunt assessments.