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Transcutaneous Electrical Nerve Stimulation in Relation to Central Sensitization in Osteoarthritis of the Knee — TENSSENS  

Osteoarthritis, Knee Clinical Trial

Official title:
Effect of Transcutaneous Electrical Nerve Stimulation in Relation to Central Sensitization in Patients With Osteoarthritis of the Knee: a Randomized Controlled Clinical Trial.

Clinical Trial Summary

Background

Central sensitization has recently been documented in patients with knee osteoarthritis. So far, the presence of central sensitization has not been considered as a confounding factor in studies assessing the pain inhibitory effect of TENS on osteoarthritis of the knee.

Purpose

First, to explore the pain inhibitory effect of burst TENS in OAk patients. Second, to explore the prognostic value of central sensitization on the pain inhibitory effect of TENS in Oak patients.

Methods

Patients with knee pain due to OAk will be recruited through advertisements in local media. Temporal summation, before and after a heterotopic noxious conditioning stimulation, will be measured. In addition, pain on a numeric rating score and WOMAC subscores for pain and function will be assessed. Patients will be randomly allocated to one of two treatment groups (TENS, sham TENS). Follow-up measurements will be scheduled after a period of 6 and 12 weeks.

Discussion/ conclusion

TENS influences pain through the electrical stimulation of low-threshold A-beta cutaneous fibers. The responsiveness of central pain-signaling neurons of OAk patients who are centrally sensitized may be augmented to the input of these electrical stimuli. This would encompass an adverse therapy effect of TENS. Therefore it might be interesting to identify a subgroup of symptomatic OAk patients, ie. non-sensitized patients, who are likely to benefit from burst TENS.

Clinical Trial Description

n/a

Study Design

Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Outcomes Assessor), Primary Purpose: Treatment

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT01390285
Study type Interventional
Source Vrije Universiteit Brussel
Contact
Status Not yet recruiting
Phase N/A
Start date February 2012
Completion date March 2014
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