Abstract
Aim
The aim of the study was to compare the learning curves of three beginner operators using two different techniques of intra-articular injection of the knee under fluoroscopic guidance with a superolateral approach.
Materials and methods
In total, 177 consecutive patients (72 females (40.7%) and 105 males (59.3%), mean age 42.2 ± 15.0 years) scheduled for a computed tomography (CT) arthrography and without joint effusion on the lateral X-rays were enrolled. They underwent an intra-articular injection of the knee under fluoroscopic guidance with a superolateral approach. Patients were randomly assigned to three different operators, including a junior supervisor and two first-year residents in radiology who never performed an intra-articular injection of the knee before the present study. Procedures in lateral or supine position were randomly assigned to three operators.
Results
There was a higher rate of successful injections with the lateral position (92.1%) than with supine position (80.2%) (odds ratio (OR) 4.52, 95% confidence interval (CI) 1.46–14.0). A significant learning effect was observed for the supine position, while none was observed for the lateral position. Pain and time of fluoroscopy did not differ between the two procedures (p = 0.85 and p = 0.10, respectively). Junior supervisor had a higher rate of successful intra-articular injection compared with the other two operators (p = 0.0072). There was a statistically significant higher rate of extravasation with the supine position (66.3%) than with lateral position (19.7%) (p < 0.0001, OR 0.13, 95% CI 0.06–0.25).
Conclusion
The intra-articular injection of the knee under fluoroscopic guidance with the patient in lateral position is an easy technique for operators in training with a low rate of extravasation. Lateral position does not require a supplementary irradiation and does not increase the procedural pain. Personal operator’s skill is an independent factor in determining the success of the training.
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Change history
17 February 2018
The published version of this article contained a mistake. In Table 1 of the original article, the numbers of successful injections and failed injections were not correct. The correct Table 1 should read as given below:
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Acknowledgements
Adelin Albert, PhD, and Laurence Seidel, PhD, are kindly acknowledged for the statistical analysis.
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No animals were involved in the present study. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
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The local institutional ethics committee approved the study, and an informed consent was obtained from all individual participants included in the study.
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Simoni, P., Malaise, O., El Hachemi, M. et al. Learning curves of two different techniques for the intra-articular injection of the knee joint under fluoroscopic guidance. Radiol med 123, 359–366 (2018). https://doi.org/10.1007/s11547-017-0847-2
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DOI: https://doi.org/10.1007/s11547-017-0847-2