Lf-rTMS Attenuates Visceral Pain in Irritable Bowel Syndrome With Diarrhea

Condition(s) studied

Investigational drug(s) / intervention(s)

Repetitive Transcranial Magnetic Stimulation: A figure-of-eight coil is used to apply active low-frequency (1 Hz) rTMS to the corresponding representation area of theprefrontal cortex (mPFC). The treatment is administered for 20 minutes daily for a total of 2 weeks.

Sham (No Treatment): For the sham rTMS group, the coil was placed over the mPFC with the rTMS function disabled, and pre-recorded acoustic artifacts were played to mimic the auditory experience of the rTMS group.

Study summary

Objectives: To identify a central hub of visceral pain in IBS-D and elucidate the mechanism by which repetitive transcranial magnetic stimulation (rTMS) confers analgesic effects.

Methods: A total of 42 IBS-D patients were recruited and randomly assigned (1:1) to the sham rTMS or the rTMS group. A nested cohort of 21 IBS-D participants who completed baseline fMRI assessments prior to randomization was included. Consistent with the randomization procedure，these individuals were evenly distributed between the two groups. Both participants and outcome assessors remained blinded to treatment allocation throughout the study. All patients completed the two-week intervention and were included in the final analysis.

Eligibility

Primary outcome measure(s)

• Visceral Sensitivity Index — 2 weeks of treatment
  (1) Clinical control: After the course of treatment, clinical symptoms disappear; (2) Significant effect: After the course of treatment, the symptom grading is reduced by 2 levels; (3) Effective: After the course of treatment, the symptom grading is reduced by 1 level; (4) Ineffective: After treatment, those who do not meet the above standards.

Trial sites (1)

More The First Affiliated Hospital of Soochow University trials in China

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