Patients with grade IV or V renal injury frequently have associated visceral injuries that can limit options such as open surgical repair or anticoagulation. 1 The use of endovascular stents to treat trauma-induced renal artery thrombosis and intimal damage appears promising. 2,3 However, data verifying the effectiveness of the treatment is lacking. We present a case of acute renal artery revascularization after trauma with subsequent stent thrombosis. Our case illustrates the failure of stent therapy when anticoagulation is not possible.
CASE REPORTA 43-year-old female motorcyclist sustained blunt trauma and presented with abdominal, chest, and extremity pain. Physical examination was significant for an acutely tender abdomen. Serum chemistries and hematocrit were within normal limits. Gross blood was not present on Foley catheter insertion, but urinalysis revealed microscopic hematuria. A computed tomography scan showed the right kidney was nonperfused; indicating a grade V injury (Fig. 1). No perinephric hemorrhage or retroperitoneal fluid was noted. In addition, a grade IV liver injury and a grade I splenic laceration were present. After consultation between the urology, trauma, and interventional radiology service, a laparotomy was deemed inadvisable because of the likelihood of massive liver bleeding. A diagnostic angiography, however, showed no active extravasation from the liver and an abrupt cut off of the injured right renal artery (Fig. 2). A hydrophilic guidewire was used to cross the thrombosed vessel. Two overlapping Cordis Genesis PG244B stents (Johnson and Johnson, Warren, N.J.) were deployed on a high-pressure angioplasty balloon. Repeat angiography revealed restored blood flow to the kidney with no residual intraluminal defect (Figs. 3 and 4). The hepatic and splenic injuries were managed nonoperatively. Given this concomitant trauma, no anticoagulation or antiplatelet therapy was initiated after stent placement. On postoperative day three, the patient's serum creatinine doubled. Renal ultrasound demonstrated an absence of flow to the right renal artery. The patient's creatinine peaked at 2.8 and later normalized to 1.2. A 1-month follow-up computed tomography scan and lasix MAG-3 renal scan, respectively, showed patchy contrast uptake and 5% relative function in the stented kidney.