Systemic sclerosis & Raynaud's

Transcutaneous auricular branch vagal nerve stimulation as a non-invasive add-on therapeutic approach for pain in systemic sclerosis

RMD OpenPublished Randomised controlled trial

Authors' conclusion

tVNS demonstrated to be a safe and non-invasive add-on tool to reduce pain in SSc.

Study context

Population
Patients with systemic sclerosis (SSc) and reported pain (Numeric Rating Scale (NRS)); 90% limited cutaneous SSc21 completed
Participants
32 patients
Comparison
tVNS vs active control, add-on, 4 weeks each
Primary endpoint
Pain (NRS)
Follow-up
After 1 month
Methodological detailscross-over, patient-blind, active control, 4-week washout
  • Cross-over
  • Patient-blind
  • Active control
  • 4-week washout

Primary result

As reported in the abstract

NRS pain, change

tVNS

−27.7%

Mean · SD 21.3%

Active control

−7.7%

Mean · SD 26.3%

P = 0.002

Further findings

OutcomeP value
Interleukin-6Downregulated in tVNSP = 0.029

PROMIS-29 Item4, QoL scales and heart rate variability (HRV)

No significant differences in tVNS vs active control

Original publication

Transcutaneous auricular branch vagal nerve stimulation as a non-invasive add-on therapeutic approach for pain in systemic sclerosis. RMD Open. Published 3 August 2023. doi:10.1136/rmdopen-2023-003265

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