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Enduring efficacy of Botulinum toxin type A injection for refractory anterior knee pain.
MedLine Citation:
PMID:  21936736     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Purpose: To examine long-term outcomes of Botulinum toxin type A (BoNT-A) injection to vastus lateralis (VL) for refractory anterior knee pain (AKP). Methods: Two cohorts (private clinic referrals and previous research participants) injected with BoNT-A for AKP by one neurologist were surveyed retrospectively. Primary outcomes were self-reported benefit, duration of symptom relief, and knee surgery post-injection. Secondary outcomes were changes in utilization of medication/physiotherapy treatment, AKP symptoms and activity limitation. Results: Overall, average symptom duration was 76 months (SD 98). Responses were available from 46 of 53 private patients. Thirty-eight reported benefit from injection, which was ongoing in 29. Average benefit was 25 months (SD 21). Nine individuals reported symptom recurrence after an average of 14 months (SD 21). Ten had knee surgery post-injection; six of whom had not benefitted from BoNT-A injection. Nineteen of 23 previous research participants were contactable. Initially, all responded favorably to injection. Symptomatic benefit, with an average duration of 44 months (SD 20), persisted in 15. Two subjects proceeded to surgical intervention. Conclusions: A single BoNT-A treatment to VL led initially to improved function and relief of knee-related symptoms in 57 of 65 individuals. Improvements were sustained at follow-up, with an average benefit of 34 months (SD 25) post-injection, in 44 of 57 cases. [Box: see text].
Authors:
Benjamin I Silbert; Barbara J Singer; Peter L Silbert; James T Gibbons; Kevin P Singer
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-9-22
Journal Detail:
Title:  Disability and rehabilitation     Volume:  -     ISSN:  1464-5165     ISO Abbreviation:  -     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-9-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9207179     Medline TA:  Disabil Rehabil     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Enrolled in MBBS degree at the Faculty of Medicine, Dentistry and Health Sciences, The University of Western Australia , Perth , Western Australia.
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