4.5 Article

IS THE OUTCOME OF DIAGNOSTIC NERVE BLOCK RELATED TO SPASTIC MUSCLE ECHO INTENSITY? A RETROSPECTIVE OBSERVATIONAL STUDY ON PATIENTS WITH SPASTIC EQUINOVARUS FOOT

Journal

JOURNAL OF REHABILITATION MEDICINE
Volume 54, Issue -, Pages -

Publisher

FOUNDATION REHABILITATION INFORMATION
DOI: 10.2340/jrm.v54.085

Keywords

muscle hypertonia; muscle spasticity; nerve block; rehabilitation; ultrasonography

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This study found a correlation between spastic calf muscles echo intensity and the outcome of tibial nerve motor branches selective block in patients with spastic equinovarus foot. Patients with higher spastic calf muscles echo intensity had a poor response to the nerve block.
Objective: To investigate the relationship between spastic calf muscles echo intensity and the outcome of tibial nerve motor branches selective block in patients with spastic equinovarus foot. Design: Retrospective observational study. Patients: Forty-eight patients with spastic equinovarus foot. Methods: Each patient was given selective diagnostic nerve block (lidocaine 2% perineural injection) of the tibial nerve motor branches. All patients were evaluated before and after block. Outcomes were: spastic calf muscles echo intensity measured with the Heckmatt scale; affected ankle dorsiflexion passive range of motion; calf muscles spasticity measured with the modified Ashworth scale and the Tardieu scale (grade and angle). Results: Regarding the outcome of tibial nerve selective diagnostic block (difference between pre- and post-block condition), Spearman's correlation showed a significant inverse association of the spastic calf muscles echo intensity with the affected ankle dorsiflexion passive range of motion (p= 0.045; rho = 000.269), modified Ashworth scale score (p = 0.014; rho = -0.327), Tardieu grade (p =0.008; rho = -0.352) and Tardieu angle (p = 0.043; rho =-0.306). Conclusion: These findings support the hypothesis that patients with spastic equinovarus foot with higher spastic calf muscles echo intensity have a poor response to selective nerve block of the tibial nerve motor branches.

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