Sensitivity and specificity for detecting pseudotumors in patients with hip resurfacing arthroplasty, metal-on-metal or metal-on-polyethylene total hip arthroplasty-MRI versus ultrasonography performed by an orthopedic surgery resident.

IF 0.9 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Rasmus T Mikkelsen, Martin Schou, Trine Torfing, Ole Graumann, Søren Overgaard, Claus Varnum
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引用次数: 0

Abstract

Background: Metal artifact reduction sequence magnetic resonance imaging (MRI) scan is a common method to detect adverse reaction to metal debris in total hip arthroplasty (THA). It might be quicker and cheaper if ultrasonography (US) could screen for the need for an MRI. However, both require trained personnel.

Purpose: We aimed to investigate the sensitivity and specificity of US for detecting pseudotumors (PT) when performed by an orthopedic surgery resident compared to MRI. We also investigated the sensitivity and specificity of US to detect PTs in obese and non-obese patients.

Material and methods: We examined 205 patients with hip resurfacing arthroplasty, metal-on-metal or metal-on-polyethylene THA with both MRI and US. US was performed by an orthopedic surgery resident who was trained according to a standardized training program in musculoskeletal US. Results from MRI were used as gold standard.

Results: US had a sensitivity of 0.92 (95% CI 0.81-0.98) and specificity of 0.94 (95% CI 0.89-0.97) for detecting PT. It had a positive predictive value of 0.84 (95% CI 0.73-0.91) and a negative predictive value of 0.97 (95% CI 0.93-0.99). US performed similarly in obese and non-obese patients.

Conclusions: US had a high sensitivity and specificity for detecting PT when performed by an orthopedic surgery resident. Trained orthopedic surgeons could screen for the need of an MRI scan when searching PTs.

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由骨科住院医师执行的髋关节表面置换、金属对金属或金属对聚乙烯全髋关节置换术- mri与超声检查对假肿瘤检测的敏感性和特异性
背景:金属伪影还原序列磁共振成像(MRI)扫描是检测全髋关节置换术(THA)中金属碎片不良反应的常用方法。如果超声检查(美国)可以筛查是否需要核磁共振成像,可能会更快更便宜。然而,两者都需要训练有素的人员。目的:我们的目的是研究由骨科住院医师进行的US检测假肿瘤(PT)的敏感性和特异性,并与MRI进行比较。我们还研究了US在肥胖和非肥胖患者中检测PTs的敏感性和特异性。材料和方法:我们用MRI和超声检查了205例髋关节置换术患者,金属对金属或金属对聚乙烯THA。US由一名骨科住院医师执行,他接受了肌肉骨骼US标准化培训计划的培训。MRI结果作为金标准。结果:US检测PT的敏感性为0.92 (95% CI 0.81 ~ 0.98),特异性为0.94 (95% CI 0.89 ~ 0.97),阳性预测值为0.84 (95% CI 0.73 ~ 0.91),阴性预测值为0.97 (95% CI 0.93 ~ 0.99)。美国在肥胖和非肥胖患者中的表现相似。结论:US在骨科住院医师检测PT时具有很高的敏感性和特异性。训练有素的骨科医生可以在搜索PTs时筛选是否需要进行核磁共振扫描。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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