NDLI: The role of SPECT/CT in painful, noninfected knees after knee arthroplasty: a systematic review and meta-analysis

Content Provider	Springer Nature : BioMed Central
Author	Anzola, Luz Kelly Hernandez, Nathaly Rodriguez, Luis Fernando Sanguino, Gilberto Martinez, Ernesto Lopez, Rodrigo Moreno, Sergio Prill, Robert Mut, Fernando Rasch, Helmut Hirschmann, Michael
Abstract	Purpose The aim of this systematic review was to present the current evidence on the clinical use of single-photon emission computed tomography/computed tomography (SPECT/CT) in the evaluation of noninfected painful knees after knee arthroplasty. Methods Embase, PubMed, Google Scholar, Ovid, Scopus, Science Direct and the Cochrane Database of Systematic Reviews were searched from database inception to May 2022 following the PRISMA guidelines. As a primary outcome, we defined the role of SPECT/CT in the diagnostic approach to noninfected painful knee arthroplasty; as a secondary objective, we described the noninfection-related factors linked to painful knee arthroplasty. Pooled sensitivity, specificity, positive likelihood ratio, negative likelihood ratio, diagnostic odds ratio values and other indicators were calculated; receiver operating characteristic (ROC) curve analysis results and a summary of the areas under the curve (AUCs) from the included studies were reported. A Fagan plot, likelihood ratio plot and Deeks’ funnel plot were generated and analysed. Methodological quality was assessed using the QUADAS-2 tool, and the certainty of evidence was assessed by the GRADE approach. Results A total of 493 publications were identified, of which eight met the inclusion criteria, with a final pooled sample size of 308 patients. The pooled sensitivity and specificity of SPECT/CT in diagnosing the source of pain in painful knee prostheses were 0.86 (95% CI: 0.75–0.93) and 0.90 (95% CI: 0.79–0.96), respectively, with pooled +LR and −LR values of 8.9 (95% CI: 4.11–19.19) and 0.15 (95% CI: 0.09–0.28). The pooled diagnostic odds ratio was 57.35, and the area under the curve was 0.94. SPECT/CT highly accurately identified different sources of pain, such as loosening of the prosthetic components, patellofemoral overloading, instability, malalignment of the components and degeneration of the patellofemoral compartment. The confidence of the estimates was moderate according to the GRADE approach. Conclusion With demonstrated high sensitivity and specificity, as a diagnostic tool, SPECT/CT can identify the source of pain in painful knees after knee arthroplasty, particularly in cases of loosening, patellofemoral disorders and component malalignment (level of evidence III). These findings have significant clinical repercussions, such as in changing the initial diagnosis, identifying or excluding different causes of painful knee arthroplasties, guiding subsequent treatment and positively impacting the final clinical outcome. We moderately recommend the use of SPECT/CT for identifying the source of pain after knee arthroplasty according to the GRADE assessment. This review was preregistered in Prospero under code CRD42022320457.
Related Links	https://josr-online.biomedcentral.com/counter/pdf/10.1186/s13018-023-03687-8.pdf
Ending Page	20
Page Count	20
Starting Page	1
File Format	HTM / HTML
DOI	10.1186/s13018-023-03687-8
Journal	Journal of Orthopaedic Surgery and Research
Issue Number	1
Volume Number	18
Language	English
Publisher	BioMed Central
Publisher Date	2023-03-21
Access Restriction	Open
Subject Keyword	Orthopedics Surgical Orthopedics
Content Type	Text
Resource Type	Review
Subject	Surgery Orthopedics and Sports Medicine
Journal Impact Factor	2.8/2023
5-Year Journal Impact Factor	3/2023

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