Superficial Femoral Artery Pseudoaneurysm After Intra-articular Adductor Canal Pain Catheter Placement for Total Knee Arthroplasty

Vascular injury following total knee arthroplasty (TKA) is a rare complica-tion. The authors present a case of superficial femoral artery aneurysm in a 60-year-old man following elective TKA in the setting of intra-articular On-Q* (Avanos Medical) pain catheter placement into the adductor canal for postoperative pain control. This is the second reported case of pseu-doaneurysm secondary to adductor canal block. The patient presented on postoperative day 8 with thigh swelling, ecchymosis, and pain. The pseu-doaneurysm was subsequently diagnosed and successfully stented after selective catheterization. The patient was discharged the next day. This case highlights the importance for a high index of suspicion in patients present-ing with acute swelling in the postoperative period. If identified in a timely fashion, treatment with stenting or selective catheter embolization can suc-cessfully treat this issue and help avoid further complications.