HSS Ultrasound of the Month - Case 57

Clinical History 63-year-old male with knee stiffness and pain after knee replacement 3 weeks prior.

Blood was aspirated in the surgeon’s office, and ultrasound of the knee was requested.

Ultrasound of the Month – Case 57

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Images courtesy of Gabrielle Konin, MD and Gregory Saboeiro, MD

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Ultrasound of the Month – Case 57

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Ultrasound of the Month – Case 57

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Diagnosis: Arterial Pseudoaneurysm After Knee Replacement

Discussion Pseudoaneurysm is an uncommon complication after total knee arthroplasty, with a reported incidence of 0.03% to 0.2%.

Symptoms of a pseudoaneurysm include pain, gait disability, cold foot, pulsatile mass and recurrent hemarthrosis.

Ultrasound is a cheap, sensitive modality for patients suspected of a pseudoaneurysm.

If a pseudoaneurysm is detected by ultrasound, MRA may be indicated to more accurately delineate the parent artery for possible embolization.

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