Cohen D M, Garcia C T, Dietrich A M, Hickey R W
Ohio State University, Section of Emergency Medicine, Children's Hospital, Columbus 43205-2696, USA.
Pediatr Emerg Care. 1997 Aug;13(4):247-9.
Recently, we have had clinical success detecting foreign bodies (FBs) using a mobile C-arm fluoroscopic device. This study tests its utility to detect FBs of differing densities in soft tissue.
Blinded, randomized, controlled in vitro study.
Two physicians used the Xi-scan mini C-arm to image FBs. Five FBs of differing densities were studied: metal, gravel, glass, wood, and plastic. The FBs were placed into the deep muscles of chicken legs. One hundred observations were made: 50 legs with FBs and 50 legs without FBs. The blinded investigators imaged the legs and determined the presence or absence of FBs.
Imaging located 100% of metal, gravel and glass FBs. Plastic and wood could not be consistently detected (sensitivity 0.4, specificity 0.6).
This device accurately detects metal, gravel and glass. Radiolucent (wood) and semiradiopaque (plastic) FBs could not be located reliably. Clinical trials would define utility of this device in saving time, money and radiation exposure.
最近，我们使用移动C形臂荧光透视设备在检测异物（FBs）方面取得了临床成功。本研究测试了其在检测软组织中不同密度异物的效用。
盲法、随机、对照体外研究。
两名医生使用Xi-scan迷你C形臂对异物进行成像。研究了五种不同密度的异物：金属、砾石、玻璃、木材和塑料。将异物放入鸡腿的深层肌肉中。共进行了100次观察：50条腿有异物，50条腿没有异物。盲法研究者对腿部进行成像，并确定是否存在异物。
成像能检测出100%的金属、砾石和玻璃异物。塑料和木材异物无法始终被检测到（灵敏度0.4，特异性0.6）。
该设备能准确检测金属、砾石和玻璃异物。透光性异物（木材）和半不透光异物（塑料）无法可靠定位。临床试验将确定该设备在节省时间、金钱和辐射暴露方面的效用。
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