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Heated lidocaine/tetracaine patch for treatment of patellar tendinopathy pain

Authors Gammaitoni A, Goitz HT, Marsh S, Marriott TB, Galer BS

Received 4 April 2013

Accepted for publication 17 May 2013

Published 19 July 2013 Volume 2013:6 Pages 565—570


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

Arnold R Gammaitoni,1 Henry T Goitz,2 Stephanie Marsh,2 Thomas B Marriott,3 Bradley S Galer1

1Pain Group, Nuvo Research US, West Chester, PA, USA; 2Sports Medicine, Detroit Medical Center, Warren, MI, USA; 3Pain Group, Nuvo Research US, Salt Lake City, UT, USA

Introduction: The pain of patellar tendinopathy (PT) may be mediated by neuronal glutamate and sodium channels. Lidocaine and tetracaine block both of these channels. This study tested the self-heated lidocaine-tetracaine patch (HLT patch) in patients with PT confirmed by physical examination to determine if the HLT patch might relieve pain and improve function.
Methods: Thirteen patients with PT pain of ≥14 days' duration and baseline average pain scores ≥4 (on a 0–10 scale) enrolled in and completed this prospective, single-center pilot study. Patients applied one HLT patch to the affected knee twice daily for 2–4 hours for a total of 14 days. Change in average pain intensity and interference (Victorian Institute of Sport Assessment [VISA]) scores from baseline to day 14 were assessed. No statistical inference testing was performed.
Results: Average pain scores declined from 5.5 ± 1.3 (mean ± standard deviation) at baseline to 3.8 ± 2.5 on day 14. Similarly, VISA scores improved from 45.2 ± 14.4 at baseline to 54.3 ± 24.5 on day 14. A clinically important reduction in pain score (≥30%) was demonstrated by 54% of patients.
Conclusion: The results of this pilot study suggest that topical treatment that targets neuronal sodium and glutamate channels may be useful in the treatment of PT.

Keywords: patellar tendinopathy, patellar tendinosis, heated lidocaine/tetracaine patch, topical analgesic patch, knee pain

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