alexa Effects of Botulinum Toxin Landmark-Guided Intra-articular Injection in Subjects With Knee Osteoarthritis.
Orthopaedics

Orthopaedics

Journal of Arthritis

Author(s): LinFen Hsieh, ChingChieh Chou, SaiWei Yang, ShihHui Wu, YiJia Lin

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BACKGROUND: Increasing evidence has suggested that botulinum toxin A (BoNT/A) can inhibit the release of selected neuropepetide transmitters from primary sensory neurons. Thus, intraarticular (IA) injection therapies with BoNT/A may reduce pain in patients with knee osteoarthritis (OA).

OBJECTIVE:

To investigate the effects of landmark-guided IA injection of BoNT/A on patients with knee OA.

DESIGN:

A prospective randomized controlled trial.

SETTING:

A rehabilitation clinic of a private teaching hospital.

PATIENTS:

A total of 46 patients with symptomatic knee OA (mostly Kellgren/Lawrence grade 2-3).

METHODS:

The patients were randomly assigned to 1 of the following groups: BoNT/A group (BoNT/A injection; n = 21) or control group (education only; n = 20). The patients in the BoNT/A group received an IA injection of 100 units of BoNT/A into the affected knee.

MAIN OUTCOME MEASURES:

The short-term (1 week posttreatment) and long-term (6 months posttreatment) effects were evaluated using a pain visual analogue scale (VAS) and questionnaires concerning functional status, including the Lequesne and Western Ontario and McMaster Universities (WOMAC) indexes.

RESULTS:

The between-group comparison revealed significant differences with regard to the pain VAS score at 1 week (P < .001) and at 6 months (P = .001) posttreatment. Similar findings for the between-group comparison were observed for the WOMAC and Lequesne indexes at 6 months (P < .05) posttreatment. The pain VAS score in the BoNT/A group significantly decreased from 5.05 ± 1.12 (pretreatment) to 2.89 ± 1.04 at 1 week (P < .001) and 3.45 ± 1.70 at 6 months posttreatment (P < .001) but not in the control group (P = .476).

CONCLUSIONS:

The IA injection of BoNT/A provided pain relief and improved functional abilities in patients with knee OA in both the short- and long-term follow-up.

This article was published in PM R and referenced in Journal of Arthritis

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