Frank H. Netter MD School of Medicine at Quinnipiac University, North Haven, Connecticut.
Department of Radiology, NYU Grossman School of Medicine, New York, New York.
JBJS Rev. 2023 Aug 3;11(8). doi: 10.2106/JBJS.RVW.23.00070. eCollection 2023 Aug 1.
» Universal safety guidelines for the use of a knee-spanning external fixator in magnetic resonance imaging (MRI) are unlikely to be established considering the high variability in device construct configurations.» Per the US Food and Drug Administration, manufacturers are to provide parameters for safe MRI scanning for "MR Conditional" devices; however, such labeling may be limited in detail. Physicians should reference manufacturer labels as a starting point while making an educated clinical decision.» Scanning of a knee-spanning external fixator inside the MR bore has been safely demonstrated in previous studies, although with small sample sizes.» When considering MRI in a patient treated with a knee-spanning external fixator, physicians should use all available resources and coordinate with their medical team to make a clinically reasonable decision contrasting patient benefit vs. potential harm.
考虑到设备结构配置的高度可变性，不太可能为膝关节跨越式外固定器在磁共振成像（MRI）中的使用制定通用安全指南。根据美国食品和药物管理局的规定，制造商应为“磁共振兼容”设备提供安全磁共振扫描的参数; 然而，这种标签可能在细节上受到限制。医生在做出明智的临床决策时，应将制造商的标签作为起点。在以前的研究中，已经安全地证明了在磁共振腔内扫描膝关节跨越式外固定器，尽管样本量较小。当考虑对使用膝关节跨越式外固定器的患者进行 MRI 检查时，医生应利用所有可用资源并与他们的医疗团队协调，做出对患者获益与潜在危害进行对比的合理临床决策。
