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Dynamic response of medial meniscus extrusion to the lateral wedge insole is correlated with immediate pain reduction in knee osteoarthritis patients: real-time ultrasonographic study

  • Original Article–Orthopedics
  • Published:
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Abstract

Purpose

To investigate the effect of lateral wedge insole (LWI) on medial meniscus extrusion (MME) observed during dynamic evaluation with ultrasound and its correlation with the alteration in knee pain in patients with knee osteoarthritis (OA).

Methods

This cohort study included 25 participants with knee OA. The medial meniscus was imaged during walking in video mode using ultrasonography. The degree of increase in MME (ΔMME) was calculated as the difference in the value of the maximum and minimum MME. The intensity of knee pain was evaluated immediately after the walking trial using the visual analogue scale (VAS). These measurements were performed with and without the LWI. The participants were categorised into the responder group, which was identified by the constant reduction in the VAS, and the non-responder group.

Results

MME, ΔMME, and knee pain during walking were significantly lower with the LWI than without the LWI (p < 0.01). The reduction in ΔMME with the LWI in the responder group was significantly higher than that in the non-responder group (p < 0.01).

Conclusions

Our findings showed that MME and knee pain during walking decreased with LWI use, especially in patients whose reduction in knee pain was characterised by inhibition in the increase in MME observed during dynamic evaluation with ultrasound.

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Acknowledgements

The authors would like to thank Editage (www.editage.com) for English language editing.

Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Author information

Authors and Affiliations

  1. Department of Biomechanics, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan

    Yosuke Ishii, Makoto Takahashi & Yoshitaka Iwamoto

  2. Department of Artificial Joints and Biomaterials, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan

    Masakazu Ishikawa

  3. Department of Musculoskeletal Ultrasound in Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan

    Yuko Nakashima

  4. Ultrasound Business Operations, Healthcare Business Headquarters, KONICA MINOLTA, INC, Tokyo, Japan

    Kaoru Okada & Kazuya Takagi

  5. Laboratory of Analysis and Control of Upper Extremity Function, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan

    Toru Sunagawa

  6. Department of Orthopedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan

    Nobuo Adachi

Authors
  1. Yosuke Ishii
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  2. Masakazu Ishikawa
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  3. Yuko Nakashima
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  7. Kazuya Takagi
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  9. Nobuo Adachi
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Contributions

Yosuke Ishii: acquisition and analysis of data, conception and design, and drafting the article. Masakazu Ishikawa: analysis and interpretation of data. Yuko Nakashima: image reconstruction. Makoto Takahashi: drafting the article. Yoshitaka Iwamoto: acquisition of data. Kaoru Okada: image reconstruction. Kazuya Takagi: image reconstruction. Toru Sunagawa: interpretation of data. Nobuo Adachi: final approval of the manuscript.

Corresponding author

Correspondence to Yosuke Ishii.

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Conflict of interest

Yosuke Ishii, Masakazu Ishikawa, Yuko Nakashima, Makoto Takahashi, Yoshitaka Iwamoto, Kaoru Okada, Kazuya Takagi, Toru Sunagawa, and Nobuo Adachi declare that they have no conflicts of interest.

Human rights statement and informed consent

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions. Informed consent was obtained from all patients for being included in the study.

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Ishii, Y., Ishikawa, M., Nakashima, Y. et al. Dynamic response of medial meniscus extrusion to the lateral wedge insole is correlated with immediate pain reduction in knee osteoarthritis patients: real-time ultrasonographic study. J Med Ultrasonics 49, 731–738 (2022). https://doi.org/10.1007/s10396-022-01234-2

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  • DOI: https://doi.org/10.1007/s10396-022-01234-2

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