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A computer tablet software can quantify the deviation of scapula medial border from the thoracic wall during clinical assessment of scapula dyskinesis

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Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

Aim of this study is to establish an objective and easily applicable method that will allow clinicians to quantitatively assess scapular dyskinesis during clinical examination using a computer tablet software. Hypothesis is that dyskinetic scapulae present greater motion—deviation from the thoracic wall—compared to the non-dyskinetic ones and that the software will be able to record those differences.

Methods

Twenty-five patients and 19 healthy individuals were clinically evaluated for the presence of dyskinesis or not. According to the clinical diagnosis, the observations were divided into three groups; A. Dyskinetic scapulae with symptoms (n = 25), B. Contralateral non-dyskinetic scapulae without symptoms (n = 25), C. Healthy control scapulae (n = 38). Then, all individuals were tested using a tablet with the PIVOT™ image-based analysis software (PIVOT, Impellia, Pittsburgh, PA, USA). The motion produced by the scapula medial border and inferior angle deviation from the thoracic wall was recorded.

Results

The deviation of the medial border and inferior angle of the scapula from the thoracic wall was 24.6 ± 7.3 mm in Group A, 14.7 ± 4.9 mm in Group B, and 12.4 ± 5.2 mm in Group C. The motion recorded in the dyskinetic scapulae group was significantly greater than both the contralateral non-dyskinetic scapulae group (p < 0.01) and the healthy control scapulae group (p < 0.01).

Conclusion

The PIVOT™ software was efficient to detect significant differences in the motion between dyskinetic and non-dyskinetic scapulae. This system can support the clinical diagnosis of dyskinesis with a numeric value, which not only contributes to scapula dyskinesis grading but also to the evaluation of the progress and efficacy of the applied treatment, thus providing a feedback to the clinician and the patient.

Level of evidence

IV, laboratory study.

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Acknowledgements

The authors are grateful to Dr. Volker Musahl, Professor of Orthopaedic Surgery, University of Pittsburgh, USA and Mrs. Norma Nieto, Impellia Co, USA, for their valuable consultation during the execution of the present study. They offered solutions to any difficulty we faced with the Pivot App use and function.

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Authors and Affiliations

Authors

Contributions

TT conceived the study and participated in its design, co-ordination, data collection and manuscript preparation. DK carried out the literature search, wrote the initial manuscript draft, and participated in data interpretation and figures preparation. KT performed the statistical analysis, participated in data interpretation and edited the manuscript. AG participated in the study design, data collection, had the supervision of the study and performed the final critical revision of the manuscript.

Corresponding author

Correspondence to Trifon Totlis.

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Conflict of interest

All authors declare that they have no conflict of interest related to this study.

Funding

Aided by a Grant from the International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine and the Orthopaedic Research and Education Foundation.

Ethical approval

Approval was obtained from the scientific committee of the St. Luke’s Hospital, Thessaloniki (24 Oct 2017).

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Totlis, T., Kitridis, D., Tsikopoulos, K. et al. A computer tablet software can quantify the deviation of scapula medial border from the thoracic wall during clinical assessment of scapula dyskinesis. Knee Surg Sports Traumatol Arthrosc 29, 202–209 (2021). https://doi.org/10.1007/s00167-020-05916-7

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