Management of Renal Artery Pseudoaneurysm

Diagnosis and Evaluation

Computed tomography angiography (CTA) is the recommended diagnostic technique for suspected renal artery pseudoaneurysm, evaluating size, thrombosis, renal parenchyma compromise, and complications, as per the European Society of Cardiology 1
Ultrasonido Doppler can be used as a complementary tool for diagnosis confirmation and monitoring evolution 1
Diagnostic duplex ultrasound scan is recommended when a pseudoaneurysm is suspected, as it can help identify over 60% of catheter-related pseudoaneurysms that may be overlooked without imaging 2

The American Heart Association recommends endovascular treatment, including embolization with coils or percutaneous ultrasound-guided thrombin injection, as the first-line approach, reserving surgery for complicated cases or failed minimally invasive techniques 1
Ultrasound-guided thrombin injection has a high success rate of 93% and is recommended for larger or symptomatic pseudoaneurysms 2
Ultrasound-guided compression therapy is also a first-line approach, although it may have limitations such as pain and long compression times 2
Surgical intervention is recommended as a second-line treatment for cases with failed endovascular treatment, hemodynamic instability, rupture or imminent risk of rupture, compression of adjacent structures with symptoms, or infection, as per the American Journal of Kidney Diseases 3
Surgical repair is indicated for pseudoaneurysms that persist or recur after compression or thrombin injection, and is reasonable for pseudoaneurysms ≥2.0 cm that fail non-surgical management 2

61% of pseudoaneurysms resolve spontaneously within 7-52 days, with 90% resolving within the first 2 months without intervention 2
Untreated pseudoaneurysms can progress to rupture with significant bleeding, emphasizing the need for prompt treatment 1, 3
Potential complications of thrombin injection include distal arterial thromboembolism, occurring in <2% of cases 2
Urgent surgical repair is necessary if complications such as rupture, venous thrombosis, painful neuropathy, or skin erosion occur 2

Regular follow-up with ultrasonido Doppler and monitoring of renal function, blood pressure, and symptoms is recommended 1, 3
Observation is recommended for small (<2.0 cm) asymptomatic pseudoaneurysms, as 61% resolve spontaneously within 7-52 days 2
Conservative management with observation is appropriate for asymptomatic cases, with re-evaluation by ultrasound 1 month after the original injury recommended 2
Monitoring for potential complications is crucial, and treatment should not be delayed for large or symptomatic pseudoaneurysms to prevent serious complications requiring urgent intervention 2