Emergency Imaging: Femoral Pseudoaneurysm
Ultrasound-Guided Compression. A conservative approach to treating PSAs, ultrasound-guided compression requires sustained compression by a skilled physician. This technique is associated with significant discomfort to the patient.5 Ultrasound-Guided Thrombin Injection. This technique is the treatment of choice for postcatheterization PSA. However, this intervention is contraindicated in patients who have concerning features such as an infected PSA, rapid expansion, skin necrosis, or signs of limb ischemia. Additionally, ultrasound-guided thrombin injection is not appropriate for use in patients with a PSA occurring at anastomosis of a synthetic graft and native artery.5
Conclusion
Based on our patient’s clinical presentation and history of aortofemoral bypass surgery, we suspected a femoral PSA. While the PSA noted in our patient was sizeable, imaging studies and clinical examination showed no sign of limb ischemia or rupture.
Femoral PSAs are usually iatrogenic in nature, typically developing shortly after catheterization or a previous bypass surgery. The most serious complication of a PSA is rupture, but a thorough examination of the distal extremity is warranted to assess for limb ischemia as well. Ultrasound imaging is considered the modality of choice based on its high sensitivity and sensitivity for detecting PSAs.
Small PSAs (<3 cm) can be managed medically, but larger PSAs (>3 cm) require treatment. Newer techniques, including stenting, coil insertion, ultrasound-guided compression, and ultrasound-guided thrombin injection are alternatives to open surgical repair of larger, uncomplicated PSAs. However, urgent open surgical repair is the only option when there is evidence of a ruptured PSA, ischemia, or skin necrosis.
