Do High-Volume Injections Affect the Ultrasonographic Neovascularization in Chronic Achilles Tendinopathy? A Randomized Placebo-Controlled Clinical Trial

Claire C. M. van Oosten*, Arco C. van der Vlist, Peter L. J. van Veldhoven, Robert F. van Oosterom, Jan A. N. Verhaar, Robert Jan de Vos

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)
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Abstract

Objective:High-volume injections (HVIs) are thought to target neovascularization in chronic midportion Achilles tendinopathy (AT), yet the mechanism has not been clarified. Therefore, we aim to evaluate whether a HVI decreases ultrasonographic Doppler flow in patients with chronic midportion AT.Design:A double-blind, randomized, placebo-controlled clinical trial.Setting:Sports medicine department at a district general hospital.Patients:Sixty-two patients with clinically diagnosed chronic midportion AT were included and randomized into the intervention group (HVI-group, n = 30) and placebo group (n = 32).Intervention:A daily calf-muscle exercise program combined with either (1) a HVI (HVI-group: 50 mL) or (2) a placebo-injection (placebo-group: 2 mL) with a mixture of saline and lidocaine.Main Outcome Measures:Primary outcome was the surface area quantification (SAQ) score (%) of the Doppler flow during a 24-week follow-up period. Secondary outcome was the association between SAQ scores and symptoms [Victorian Institute of Sports Assessment-Achilles (VISA-A)]. Outcomes were measured before, directly after, and 1 hour after the injection and at 2, 6, 12, and 24 weeks of follow-up.Results:There was no significant between-group difference at 24 weeks [-0.1%; 95% confidence interval (CI), -4.9 to 4.7] or at any of the other time points. Change in SAQ score did not correlate with the change in VISA-A score (P = 0.93).Conclusion:A HVI does not affect Doppler flow in patients with chronic midportion AT. Also, changes in Doppler flow were not associated with the clinical outcome. These findings challenge the theoretical basis of a HVI.Trial registration:NCT02996409.

Original languageEnglish
Pages (from-to)451-457
Number of pages7
JournalClinical Journal of Sport Medicine
Volume32
Issue number5
DOIs
Publication statusPublished - 1 Sept 2022

Bibliographical note

Funding Information:
Supported by Dutch Arthritis Association and the Anna Foundation. Both are non-commercial organisations and were not involved in the content of this publication.

Publisher Copyright:
© 2022 Lippincott Williams and Wilkins. All rights reserved.

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