1. Usefulness of Ultrasonography for Detection of Pseudotumors After Metal-On-Metal Total Hip Arthroplasty
- Author
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Tomonobu Hagio, Masatoshi Naito, Koichi Takano, Kunihide Muraoka, and Yoshinari Nakamura
- Subjects
Adult ,Male ,medicine.medical_specialty ,Arthroplasty, Replacement, Hip ,Total hip replacement ,Granuloma, Plasma Cell ,Positive predicative value ,medicine ,Humans ,Orthopedics and Sports Medicine ,Aged ,Retrospective Studies ,Ultrasonography ,Aged, 80 and over ,medicine.diagnostic_test ,business.industry ,Reproducibility of Results ,Magnetic resonance imaging ,Middle Aged ,Magnetic Resonance Imaging ,stomatognathic diseases ,Acetabular component ,Metal-on-Metal Joint Prostheses ,Female ,Hip Prosthesis ,Radiology ,business ,Total hip arthroplasty - Abstract
We retrospectively analyzed 83 metal-on-metal total hip arthroplasties in 74 patients. Ultrasonography and magnetic resonance imaging (MRI) of each hip were performed to detect abnormal patterns and pseudotumors. We examined the reliability of ultrasonography for detecting pseudotumors in comparison with MRI. We also compared the acetabular component inclination between patients with and without pseudotumors. The mean positive and negative predictive values for pseudotumor detection by ultrasonography were 65% and 91%, respectively. The mean positive and negative likelihood ratios were 5.78 and 0.32, respectively. There was no clear association between pseudotumor presence and acetabular component inclination. We concluded that ultrasonography is a suitable technique to screen for the presence of pseudotumors. We also need to distinguish between bearing-related and taper junction corrosion-related complications.
- Published
- 2015
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