Tim Trstenjak1, Nikola Lakič2, Mark Racman3, Tadeja Kolar4 Surgical Treatment of Endarteritis in the Iliofemoral Region with the Use of Selective Left Lower Limb Perfusion During a Prolonged Vascular Reconstruction – A Case Report ABSTRACT KEY WORDS: septic endarteritis, selective distal perfusion, Staphylococcus aureus, homograft Surgical treatment of septic endarteritis of the iliofemoral region can result in prolonged ischemia of the lower extremities. Distal perfusion of the limb can improve early post- operative outcomes. We present a case of a 35-year-old woman who was diagnosed with septic endarteritis of the right iliofemoral region as a consequence of residual wire frag- ments from a prior endovascular procedure. During the intervention, the entire right iliofemoral arterial segment was replaced with a homograft due to the destruction of native arterial walls. Because of the extent of the replacement and predicted duration of the pro- cedure, we used selective distal perfusion of her right leg to minimize the possibility of ischemia and reperfusion injury to the tissues, which is usually followed by compart- ment syndrome. The patient recovered fully. This case highlights the importance of a multi- disciplinary approach when it comes to the treatment of rare and complex cases. 1 Tim Trstenjak, dr. med., Klinični oddelek za kardiovaskularno kirurgijo, Univerzitetni klinični center Ljubljana, Zaloška cesta 7, 1000 Ljubljana 2 Dr. Nikola Lakič, dr. med., svetnik, Klinični oddelek za kardiovaskularno kirurgijo, Univerzitetni klinični center Ljubljana, Zaloška cesta 7, 1000 Ljubljana 3 Mark Racman, dr. med., Klinični oddelek za kardiovaskularno kirurgijo, Univerzitetni klinični center Ljubljana, Zaloška cesta 7, 1000 Ljubljana 4 Asist. dr. Tadeja Kolar, dr. med.,Klinični oddelek za kardiovaskularno kirurgijo, Univerzitetni klinični center Ljubljana, Zaloška cesta 7, 1000 Ljubljana; tadeja.kolar@kclj.si 15Med Razgl. 2024; 63 Suppl 2: 15–19 • doi: 10.61300/angc33 Angioloski 2024_Mr10_2.qxd 19.9.2024 8:46 Page 15 INTRODUCTION Septic endarteritis following endovascular procedures is a rare complication, report- ed in less than 1% of patients. Presentation within one to two weeks after the procedure is most common. Sites of infection usually include the groin region with inflamed skin, endarteritis, and/or pseudoaneurysm formation. Intravenous antibiotic treat- ment is considered the first line of treat- ment, but most patients require some sort of surgical intervention (1). In case of exten- sive arterial wall destruction, it is necessary to surgically replace the entire vessel seg- ment. A reperfusion injury after such a pro- cedure is a very common complication. Using selective perfusion of the affected limb could minimize the reperfusion injury to the limb and kidneys following the procedure. Written informed consent was obtained from the patient for publication of this case report and accompanying images. CASE REPORT A 35-year-old female with a history of endovascular procedures presented with a fever, headache, vomiting, pain in her right leg, and Osler’s nodes (onset of symp- toms two days prior to hospitalization). Inflammatory markers were elevated. An empirical intravenous antibiotic treatment was started (flucloxacillin, ceftriaxone). Haemocultures and the fluid from arthro- centesis of the right knee were later posi- tive for Staphylococcus aureus, so antibiotic treatment was readjusted (flucloxacillin only). An echocardiography displayed no evidence of endocarditis. An X-ray and a CT scan showed foreign material (residual wire) present in the right iliac and femoral arteries with thrombosis in the right com- mon femoral artery from prior endovascu- lar procedures (from 2006 and 2012). A positron emission tomography com- bined with a CT (PET-CT) scan showed sig- nificantly elevated metabolic activity along the iliac arteries, common femoral artery (CFA), and superficial femoral artery (SFA) indicating possible inflammation in this region. After two weeks of conservative med- ical treatment, the patient underwent an endovascular procedure to extract the resi- dual material. The attempt was unsuccess- ful due to wire adhesion to the arterial wall. Five days later, the patient was operated on again, this time with an open surgical tech- nique to remove foreign material and replace the extensive vessel segment, severely affected by endarteritis. Following proximal and distal exposure of the vessels, common iliac artery was clamped proximally and SFA distally. We perfused the distal part of the right leg via arterial cannulas (size 8 Fr) inserted in the distal SFA and femoral vein with a venous cannula (size 10 Fr) (figure 1). We used a roller pump and a children’s oxy- genator (Dideco Kids D101). The priming fluid was Ringer’s lactate with a 50 mg dose of heparin. The limb was supported with a flow of 50–130 mL/min (average: 86.00±0.35mL/min). Arterial line pressure was 59–70mmHg (average: 60.60±6.58mmHg). Hematocrit values during selective perfu- sion from the oxygenator were between 23.6–26.8% (average: 25.12 ± 1.44%) and activated clotting time (ACT) was 361–564s (average: 446.33 ± 105.29 s). Then the rest of the vessels were exposed, the wire and the affected arteries were removed, and the segment was replaced with two homo- grafts. Selective perfusion of the leg was discontinued after 73 minutes by removing the clamps. Before closing, the wound was thoroughly rinsed. After the surgery, the patient was pre- scribed lifelong acetylsalicylic acid and antibiotics for four weeks. Creatinine and myoglobin were only slightly elevated immediately after the procedure (probably due to ischemia of the thigh and buttock) and returned to normal values the same day. The patient gained full function of her lower limb during hospitalization. 16 Tim Trstenjak, Nikola Lakič, Mark Racman, Tadeja Kolar Surgical Treatment of Endarteritis in the … Angioloski 2024_Mr10_2.qxd 19.9.2024 8:46 Page 16 The patient was discharged from hos- pital after seven weeks. On the six-month follow-up appointment, the patient denied any problems concerning the functionali- ty of her right leg or any signs of inflam- mation. DISCUSSION To our knowledge, this is the first case of peripheral vascular reconstructive surgery to treat septic endarteritis, where selective perfusion of a limb during the procedure was used to minimize ischemia and reper- fusion injury due to predicted longer dura- tion of intraoperative limb ischemia. 17Med Razgl. 2024; 63 Suppl 2: Caudal Cranial Venous cannula Arterial cannula Figure 1. Cannulation of the superficial femoral artery and femoral vein, and selective perfusion. Angioloski 2024_Mr10_2.qxd 19.9.2024 8:46 Page 17 Ischemic injury is responsible for cel- lular death and also for cellular edema, which can further compromise tissue per- fusion (2). The reperfusion of ischemic tis- sues leads to the release of bioproducts of muscle ischemia and cell necrosis into circulation (potassium, phosphate, organic acids, myoglobin, creatine kinase, and thromboplastin), and can cause systemic complications such as cardiac depression, acute lung injury, renal failure and poorer limb-related functional outcomes (3). A study by Perkins and colleagues on the impact of ischemia duration on lower limb salvage in combat casualties showed that the thresh- old to restitution of blood flow should be much less than the ubiquitous six hours – the probability of limb salvage was still only around 60% when ischemia was < 3 hours (4). Current therapies aimed at mit- igating ischemia-reperfusion injury are mostly just supportive, by providing ade- quate hydration, electrolyte correction, vasopressor support, and acid-base man- agement only after reperfusion has occurred. A controlled reperfusion of the lower extremity was shown to improve outcome after acute severe lower-limb ischemia by using a crystalloid reperfusion solution with glucose, tromethamine glutamate, aspartate, allopurinol, and sodium citrate (5). During elective major vascular operations, ischemic postconditioning proved to be capable of conferring protection against different organ injuries caused by longer circulatory occlusions (6). Several studies suggest that selective renal and visceral perfusion during thoracoabdominal aortic aneurysm repair improves outcomes (7). In our case, selective distal perfusion in a peripheral vascular surgery offers a solu- tion through which malperfusion of a limb can be completely avoided during an oper- ation, thereby, avoiding the possibility of reperfusion injury. It is particularly suitable for major reconstructive vascular surgery, where the procedure itself is the cause of temporary acute ischemia. CONCLUSIONS The use of distal perfusion of the limb dur- ing a reconstructive vascular procedure highlights the importance of interdisci- plinary involvement in the improvement of patient outcomes, especially in those with anticipated prolonged limb ischemia due to a surgical procedure. 18 Tim Trstenjak, Nikola Lakič, Mark Racman, Tadeja Kolar Surgical Treatment of Endarteritis in the … Angioloski 2024_Mr10_2.qxd 19.9.2024 8:46 Page 18 REFERENCES 1. Hogg ME, Peterson BG, Pearce WH, et al. Bare metal stent infections: Case report and review of the literature. J Vasc Surg. 2007; 46 (4): 813–20. doi: 10.1016/j.jvs.2007.05.043 2. Gillani S, Cao J, Suzuki T, et al. The effect of ischemia-reperfusion injury on skeletal muscle. Injury. 2012; 43 (6): 670–5. doi: 10.1016/j.injury.2011.03.008 3. Watson JD, Gifford SM, Clouse WD. biochemical markers of acute limb ischemia, rhabdomyolysis, and impact on limb salvage. 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