Bowel necrosis following endovascular revascularization for chronic mesenteric ischemia: a case report and review of the literature
© Shirasu et al.; licensee BioMed Central Ltd. 2013
Received: 18 October 2012
Accepted: 11 July 2013
Published: 19 July 2013
Endovascular revascularization has recently been established as a less invasive treatment method for chronic mesenteric ischemia. However, intestinal necrosis caused by distal embolization following this procedure has not been emphasized.
The present report describes a 59-year-old man who was treated with endovascular revascularization for chronic mesenteric ischemia. After the procedure, he was diagnosed with intestinal necrosis caused by distal embolization. Despite emergent bowel resection, he died on postoperative day 109.
Although endovascular revascularization for chronic mesenteric ischemia is less invasive and may be suitable for high-risk patients, attention should be paid to avoid embolic complications that can cause intestinal infarction possibly leading to a fatal condition.
KeywordsChronic mesenteric ischemia Endovascular revascularization Embolization Bowel necrosis Embolic protection device
Endovascular revascularization (ER) is an emerging treatment alternative for chronic mesenteric ischemia (CMI) . Although open surgical revascularization (OR) yields a satisfactory outcome with respect to symptom relief and primary patency, it can be associated with perioperative morbidity and mortality. ER is advantageous in that it is less invasive [2, 3]. However, procedure-related complications following ER occur in approximately 10% of cases. Of these complications, distal embolization and subsequent bowel necrosis can lead to a fatal condition [4–8]. The present report describes a case of CMI associated with intestinal infarction after ER and discusses the procedure-specific complications.
The patient complained of right upper quadrant abdominal pain after the intervention, and his white blood cell count was elevated to 20 200/μL on the next day. Muscular guarding was present with further elevation of white blood cell count on the second day, and CT revealed small bowel necrosis with intestinal pneumatosis and bloody ascites. Emergency laparotomy was performed, and the necrotic ileum and ischemic ascending colon were totally resected. Post operatively, the patient suffered an ischemic heart attack and liver abscess, which were both treated nonsurgically. Although an ileostomy and a mucous fistula of the colon were viable without ischemia throughout the postoperative course, bacterial translocation from the intestine, which had already been damaged by chronic ischemia before ER, was suspected as a cause of the liver abscess. He died of massive gastrointestinal bleeding on postoperative day 109.
Abdominal angina or CMI is characterized by postprandial abdominal pain and weight loss. Insufficient intestinal blood flow causes these symptoms and is usually produced by the obstruction of 2 or 3 splanchnic vessels . The underlying etiology of this disease is atherosclerosis in more than 90% of cases. Other causes include fibromuscular dysplasia, vasculitis (such as Takayasu arteritis, giant cell arteritis, polyarteritis nodosa, systemic lupus erythematosus, and thromboangiitis obliterans), malignancy, and radiation. Patients are initially treated with conservative therapy including bowel resting, smoking cessation, and administration of vasodilator drugs. Revascularization is considered if these conservative treatments fail to relieve the symptoms. Open surgery has been the standard method for revascularization in CMI. On the other hand, since the first report by Furrer et al. on the effectiveness of percutaneous transluminal angioplasty for CMI , ER has been considered as the treatment of choice in some cases . Previous studies have reported the equivalent technical success and symptom relief rates, and lower morbidity in ER, compared with OR. Additionally, the primary patency rate is lower in ER than in OR, resulting in more secondary interventions [2, 3]. Therefore, ER is currently recommended for high-risk patients . The therapeutic method for CMI should be carefully determined, because the treatment outcomes are often affected by systemic cardiovascular comorbidities, as in our patient.
Review of distal embolization after endovascular revascularization for chronic mesenteric ischemia
Little is known about the impact of stent placement in terms of distal embolization. We did not use an embolic protection device (EPD), because there is little evidence showing its efficacy during ER for CMI. An EPD may be useful in some cases with CMI [10, 11]. Brown et al.  reported the feasibility of routine EPD use because there was no major perioperative morbidity in their endovascular treatment. In percutaneous revascularization and stent placement for renal artery stenosis, several reports have suggested the efficacy of EPDs [12, 13]. These studies showed that embolic particles were observed in 60–90% of cases treated for atherosclerotic renal arteries. However, EPD use involves the intrinsic complications of vasospasm, arterial dissection, arterial wall damage, distal hypoperfusion, and even distal embolization [14, 15]. Further studies are necessary to verify the usefulness of EPDs in cases with CMI.
Although ER for CMI is less invasive and may be suitable for high-risk patients, attention should be paid to avoid embolic complications.
Written informed consent was obtained from the patient and his family for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
Chronic mesenteric ischemia
Open surgical revascularization
Superior mesenteric artery
Embolic protection device
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