FEMORAL PSEUDOANEURYSMS IN DRUG-ADDICTS

Femoral pseudoaneurysm is a serious complication in drug addicts who h abitually inject via the groin. A total of 33 drug addicts presenting with 34 infected femoral pseudoaneurysms were treated in the Departmen t of Surgery, the University of Hong Kong, Queen Mary Hospital from Ju ly 1993 to June 1996. There were 27 men and 6 women, with ages ranging from 23 to 76 years (mean 39.6 years). Positive intraoperative tissue cultures were seen in 29 (85%), with 17 being pure growth of methicil lin-sensitive Staphylococcus aureus (MSSA). Twenty-four pseudoaneurysm s involved the femoral bifurcation and were treated by triple ligation of the common femoral, superficial femoral, and profunda femoris arte ries. Seven other limbs underwent ligation of the common femoral arter y alone, and three had superficial femoral artery ligation. Nineteen l imbs had the external iliac artery ligated in addition to the femoral ligation for better proximal control. The mean postoperative ankle-bra chial index (ABI) was 0.43 and 0.52 in those with triple ligation and those with single-vessel ligation, respectively. There was no hospital mortality, and all patients were discharged with a viable limb. The d uration of follow-up ranged from 2 to 36 months (mean 15.5 months). Fo ur patients were asymptomatic, but the rest suffered some degree of in termittent claudication. No delayed limb loss was identified. We concl ude that systemic antibiotics active against MSSA are the antibiotics of choice in drug addicts with infected femoral pseudoaneurysms. Ligat ion and excision of the pseudoaneurysm without revascularization is sa fe, with acceptable morbidity and a low limb loss rate.