A Randomized,Placebo Controlled Pilot Trial of Botulinum Toxin for Paratonic Rigidity in People with Advanced Cognitive Impairment |
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Authors: | Galit Kleiner-Fisman Edwin Khoo Nikohl Moncrieffe Triina Forbell Pearl Gryfe David Fisman |
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Affiliation: | 1. Jeff and Diane Ross Movement Disorders Clinic, Assistive Technology Clinic, Toronto, Canada.; 2. Baycrest Center for Geriatric Health, University of Toronto, Toronto, Canada.; 3. Department of Medicine, Division of Neurology, University of Toronto, Toronto, Canada.; 4. Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.; University of Glasgow, United Kingdom, |
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Abstract: | ObjectiveEvaluate safety and efficacy of Incobotulinumtoxin A in elderly patients with dementia and paratonia.SettingUniversity-affiliated hospital, spasticity management Clinic.ParticipantsTen subjects were enrolled. Inclusion criteria: 1) severe cognitive impairment 2) diagnosis of Alzheimer’s disease, vascular dementia, or frontotemporal dementia, and 3) score >3 on the paratonic assessment instrument, with posture in an arm(s) interfering with provision of care. Exclusion criteria: 1) alternate etiologies for increased tone and 2) injection with botulinum toxin within the 6 months preceding the study.DesignSingle center, randomized, double blind, placebo-controlled, crossover trial with two treatment cycles of 16 weeks. Assessments occurred at 2, 6, 12 and16 weeks following injections. Subjects received up to 300 U of Incobotulinumtoxin A in arm(s).Primary and Secondary Outcome MeasuresPrimary outcome measure was the modified caregiver burden scale (mCBS); exploratory secondary outcome measures were also performed. Analysis of variance and mixed modeling techniques were used to evaluate treatment effects.ResultsIncobotulinumtoxin A treatment produced significant improvement in mCBS total score −1.11 (–2.04 to −0.18) (Treatment effect and 95% CI), dressing sub-score −0.36 (–0.59 to 0.12), and cleaning under the left and right armpits sub-score −0.5 (–0.96 to −0.04), −0.41 (–0.79 to −0.04) respectively. PROM in the left and right elbow increased by 27.67 degrees (13.32–42.02) and 22.07 degrees (9.76–34.39) respectively. PROM in the left and right shoulder increased by 11.92 degrees (5.46–18.38) and 8.58 degrees (3.73–13.43) respectively. No significant treatment effect was found for GAS, VAS and PAINAD scales or change in time to perform care. No adverse drug reactions occurred.ConclusionsAdministration of Incobotulinumtoxin A in elderly people with advanced dementia and paratonia may be an efficacious and safe treatment to increase range of motion and reduce functional burden. Further studies are needed to confirm results.Trial RegistrationClinicalTrials.Gov {"type":"clinical-trial","attrs":{"text":"NCT02212119","term_id":"NCT02212119"}}NCT02212119 |
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