Hayek M E, Ludwig M A, Fischer K, Sisler C
Department of Surgery, Jewish Hospital of St. Louis, MO 63110.
J Vasc Surg. 1988 Mar;7(3):409-13.
Pseudoaneurysm formation is a known complication of peripheral arterial access procedures. Although standard contrast angiography has been considered the diagnostic study of choice to identify pseudoaneurysms, isotope angiography has been described as an alternative method. In this study, we examined the role of 99mTc-tagged red blood cell scans in the diagnosis of traumatic pseudoaneurysm. Forty patients underwent scans; 25 scans were reported as abnormal and 15 as normal. There were no false-negative results; one scan had false-positive results (2.5%). The presence of pseudoaneurysm among the patients with abnormal scans was verified at operation in 23 of 25 patients. The one false-positive test was verified by ultrasound. All patients with normal scans were followed up for verification. Follow-up time ranged from 2 to 28 months. Radionuclide vascular flow study appears to give information similar to that of conventional angiography. With a series false-positive rate of 2.5%, the examination has a high specificity. The 99mTc-tagged red blood cell scan is a viable alternative to conventional angiography for the diagnosis of traumatic pseudoaneurysms and is associated with less radiation and morbidity.
假性动脉瘤形成是外周动脉穿刺操作已知的并发症。尽管标准的造影血管造影一直被认为是识别假性动脉瘤的首选诊断方法，但同位素血管造影也被描述为一种替代方法。在本研究中，我们研究了99mTc标记的红细胞扫描在创伤性假性动脉瘤诊断中的作用。40例患者接受了扫描；25例扫描报告为异常，15例为正常。没有假阴性结果；1例扫描有假阳性结果（2.5%）。25例扫描异常的患者中，有23例在手术中证实存在假性动脉瘤。1例假阳性检查经超声证实。所有扫描正常的患者均进行随访以核实情况。随访时间为2至28个月。放射性核素血管血流研究似乎能提供与传统血管造影类似的信息。该检查的系列假阳性率为2.5%，具有较高的特异性。99mTc标记的红细胞扫描是诊断创伤性假性动脉瘤的一种可行的替代传统血管造影的方法，且辐射和发病率较低。
