[动物模型中检测木质异物的放射学方法评估]

[Evaluation of radiological methods for detection of wood foreign body in animal model].

作者信息

Venter Neil Grant, Jamel Nelson, Marques Ruy Garcia, Djahjah Flavia, Mendonça Leonardo de Souza

机构信息

UFRJ.

出版信息

Acta Cir Bras. 2005;20 Suppl 1:34-41.

PMID:16186971

Abstract

PURPOSE

To determine the usefulness of different radiological methods in the diagnoses of wooden foreign bodies (FB).

METHODS

Eleven adult chickens were used. Each thigh received a puncture wound and in one of them a wooden splinter was introduced and left in place while in the contralateral it was introduced and removed (control group). After 7 days the animals where killed and the legs removed to be analyzed with conventional radiography (CR), ultrasonography (US), magnetic resonance and computed tomography. The results were viewed by 2 independent senior radiologists.

RESULTS

Sensitivity was: CR--13.6%; US--63.6%; MR--59.1%; and CT--72.7%, with specificity of 100%, 100%, 95.5%, and 95.5%, respectively. The positive predictive value for CR and US was 100%, 95% for CT 95% and 93.8% for MR. CT had a negative predictive value of 78.3%, while US, MR, and CR had 73.7%, 70.1%, and 53.7%, respectively. The accuracy for CT was 84.1%, followed by US--81.8%, RM--77.3%, and CR--56.8%. Inflammatory reaction was histologically demonstrated in all thighs containing FB.

CONCLUSION

CR showed a poor performance to detect wooden FB in chickens, while US and CT seem to be the best option, followed by RM.

摘要

目的

确定不同放射学方法在诊断木质异物（FB）中的效用。

方法

使用11只成年鸡。每只鸡的大腿都有一个穿刺伤口，其中一只大腿植入一根木刺并留置，对侧大腿植入木刺后取出（对照组）。7天后处死动物，取下腿部，用传统放射摄影（CR）、超声检查（US）、磁共振成像和计算机断层扫描进行分析。结果由2名独立的资深放射科医生查看。

结果

敏感度分别为：CR——13.6%；US——63.6%；MR——59.1%；CT——72.7%，特异性分别为100%、100%、95.5%和95.5%。CR和US的阳性预测值为100%，CT为95%，MR为93.8%。CT的阴性预测值为78.3%，而US、MR和CR的阴性预测值分别为73.7%、70.1%和53.7%。CT的准确率为84.1%，其次是US——81.8%，RM——77.3%，CR——56.8%。组织学证实所有含有FB的大腿均有炎症反应。