C52. Infected Femoral Artery Pseudoaneurysm with Klebsiella pneumoniae Bacteremia in Injected Drug Abuser: A Case Report

Injected drug abuse is a significant problem in modern societies today, with increases various vascular complications due to repeated punctures under septic conditions. One of the severe vascular complications is infected pseudoaneurysm. However, no study reported the involvement of Klebsiella pneumonia in infected pseudoaneurysm.

A 40-year-old homeless man, an injected drug abuser, presented to the emergency department with a severe pain lump in the right groin area since three weeks ago. The hemodynamic was unstable and the laboratory examination revealed severe infection. While ultrasonography was suggesting high suspicion of lymphadenitis in the right groin area, the Doppler ultrasonography was showing a pseudoaneurysm in the right common femoral artery. The blood cultures grew Klebsiella pneumonia ESBL. Patient was planned to be referred to vascular surgery center. Unfortunately, before patient got a referral, his condition worsened with a fall of hemoglobin suggesting rupture of pseudoaneurysm that didn’t improve with resuscitation.

A tender swollen groin in an injected drug abuser should prompt a high index of suspicion for the presence of pseudoaneurysm. When faced with uncertain diagnosis, further investigation with appropriate imaging is warranted. In this case, diagnosis of infected pseudoaneurysm was confirmed due to the co-incidence of septic condition. Surgical management with controlled infection and resuscitation was required, however, it remained a challenge due to the unstable condition and pseudoaneurysm itself that was prone to rupture. In addition, Klebsiella pneumonia ESBL made bacteria resistant to cephalosporins and monobactams.