Olofsson P A, Auffermann W, Higgins C B, Rabahie G N, Tavares N, Stoney R J
Department of Surgery, University of California, San Francisco 94143.
J Vasc Surg. 1988 Aug;8(2):99-105.
The accuracy of magnetic resonance imaging (MRI) in the diagnosis of prosthetic aortic graft infection was evaluated in 18 patients with history and findings suggestive of this complication. The prospective interpretation of MRI was compared with surgical findings. Sixteen patients had a graft infection verified at operation. Fourteen patients had infection of the retroperitoneal portion of the graft; two patients had an infection limited to one of the groins; no graft infection was found at surgical exploration in the remaining two patients. Perigraft infection was correctly diagnosed on the basis of MRI findings in 14 of 16 cases; findings were false negative in one case, questionable in another case, and correctly excluded graft infection in two of two cases. MRI also defined the extent of infection in 14 of 16 cases. MRI findings that supported the clinical suspicion of graft infection were perigraft fluid collections remaining more than 3 months after surgery. Furthermore, local inflammation was suggested by an increased signal intensity of adjacent muscle on T2-weighted images in some cases. CT scans were performed in 12 patients; these enabled a correct diagnosis in five and provided indeterminate or false information in seven. These results indicate that MRI is helpful in the diagnosis of aortic graft infection. Furthermore, MRI provides information about the extent of infection crucial for planning therapy.
对18例有疑似人工主动脉移植物感染病史及相关表现的患者进行了磁共振成像（MRI）诊断人工主动脉移植物感染准确性的评估。将MRI的前瞻性解读结果与手术结果进行了比较。16例患者术中证实有移植物感染。14例患者的移植物腹膜后部分发生感染；2例患者的感染局限于一侧腹股沟；其余2例患者手术探查未发现移植物感染。16例中有14例根据MRI表现正确诊断出移植物周围感染；1例结果为假阴性，1例有疑问，2例中的2例正确排除了移植物感染。MRI还明确了16例中14例的感染范围。支持临床怀疑移植物感染的MRI表现为术后3个月以上仍存在的移植物周围液体积聚。此外，在某些病例中，T2加权图像上相邻肌肉信号强度增加提示局部炎症。12例患者进行了CT扫描；其中5例诊断正确，7例提供了不确定或错误信息。这些结果表明，MRI有助于诊断主动脉移植物感染。此外，MRI可提供对治疗规划至关重要的感染范围信息。
