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首页> 外文期刊>Acta Radiologica >MR imaging findings of high-voltage electrical burns in the upper extremities: correlation with angiographic findings.
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MR imaging findings of high-voltage electrical burns in the upper extremities: correlation with angiographic findings.

机译：上肢高压电灼伤的MR影像学发现：与血管造影结果相关。

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BACKGROUND: A high-voltage electrical burn is often associated with deep muscle injuries. Hidden, undetected deep muscle injuries have a tendency for progressive tissue necrosis, and this can lead to major amputations or sepsis. MRI has excellent soft tissue contrast and it may aid in differentiating the areas of viable deep muscle from the areas of non-viable deep muscle. PURPOSE: To describe the MR imaging findings of a high-voltage electrical burn in the upper extremity with emphasis on the usefulness of the gadolinium-enhanced MRI and to compare the MR imaging findings with angiography. MATERIAL AND METHODS: We retrospectively reviewed the imaging studies of six patients with high-voltage electrical burns who underwent both MRI and angiography at the burn center of our hospital from January 2005 to December 2009. The imaging features were evaluated for the involved locations, the MR signal intensity of the affected muscles, the MR enhancement pattern, the involved arteries and the angiographic findings (classified as normal, sluggish flow, stenosis or occlusion) of the angiography of the upper extremity. We assessed the relationship between the MR imaging findings and the angiographic findings. RESULTS: The signal intensities of affected muscles were isointense or of slightly high signal intensity as compared with the adjacent unaffected skeletal muscle on the T1-weighted MR images. Affected muscles showed heterogenous high signal intensity relative to the adjacent unaffected skeletal muscle on the T2-weighted images. The gadolinium-enhanced T1-weighted images showed diffuse inhomogeneous enhancement or peripheral rim enhancement of the affected muscles. The angiographic findings of the arterial injuries showed complete occlusion in three patients, severe stenosis in two patients and sluggish flow in one patient. Of these, the five patients with complete occlusion or severe stenosis on angiography showed non-perfused and non-viable areas of edematous muscle on MRI. On the other hand, one patient with sluggish flow on angiography showed a perfused and viable area of edematous muscle on MRI. CONCLUSION: Gadolinium-enhanced MRI is a useful non-invasive imaging modality to detect the site and extent of hidden, undetected deep muscle injuries in a group of patients with high-voltage electrical burns of the upper extremities.
机译：背景：高压电灼伤通常与深部肌肉损伤有关。隐藏的，未发现的深层肌肉损伤有进行性组织坏死的趋势，这可能导致大截肢或败血症。 MRI具有出色的软组织对比度，它可以帮助区分有活力的深部肌肉和无活力的深部肌肉。目的：描述上肢高压电灼伤的MR成像结果，重点是on增强MRI的实用性，并将MR成像结果与血管造影术进行比较。材料与方法：我们回顾性分析了我院2005年1月至2009年12月在MRI和血管造影中同时接受MRI和血管造影的6例高压电灼患者的影像学研究。受影响的肌肉的MR信号强度，MR增强模式，累及的动脉和上肢血管造影的血管造影结果（分类为正常，血流缓慢，狭窄或闭塞）。我们评估了磁共振成像结果与血管造影结果之间的关系。结果：在T1加权MR图像上，与相邻未受影响的骨骼肌相比，受影响的肌肉的信号强度为等强度或稍高的信号强度。相对于相邻的未受影响的骨骼肌，在T2加权图像上，受影响的肌肉显示出异类的高信号强度。 T增强的T1加权图像显示了受影响肌肉的弥散性不均匀增强或外周边缘增强。动脉损伤的血管造影结果显示三名患者完全闭塞，两名患者严重狭窄，一名患者血流缓慢。其中，五名在血管造影上完全闭塞或严重狭窄的患者在MRI上显示无灌注和无活力的水肿区域。另一方面，一名在血管造影术中血流缓慢的患者在MRI上显示了一个充满水肿的肌肉区域。结论：Ga增强MRI是一种有用的非侵入性成像方式，可用于检测一组上肢高压电灼伤患者的隐匿性，未检出的深部肌肉损伤的部位和范围。

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