Occupational Hand-Arm Vibration Exposure and Its Effects on Median and Ulnar Nerve Function in Tattoo Artists: A Case-Control Study

What this Trial Is About

This observational case-control study investigates how long-term exposure to hand-arm vibration from tattoo machines affects the median and ulnar nerve functions in professional tattoo artists. The study aims to compare sensory and motor nerve function between tattoo artists and healthy individuals matched by age and sex, focusing on potential neurosensory impairments linked to occupational vibration exposure. It explores associations with peripheral neuropathy, nerve entrapment, and sensory receptor dysfunction. Participants include professional tattoo artists with at least one year of vibration exposure and healthy controls without such exposure or related medical history. Both groups undergo detailed assessments including nerve provocation tests (Tinel, Phalen, reverse Phalen, elbow flexion), Semmes-Weinstein monofilament testing, two-point discrimination, vibration perception testing at 30 Hz and 256 Hz, and measurements of grip and pinch strength. Validated patient questionnaires evaluate hand function and carpal tunnel symptoms. During a single assessment session, participants complete these sensory and motor tests along with patient-reported outcome questionnaires. Researchers measure thresholds for touch sensitivity, vibration perception, and nerve irritation signs to determine differences between groups. The study monitors nerve function using standardized clinical tools to understand how occupational vibration may impact nerve health over time. Participation involves one visit with no follow-up, and results will be compared between exposed and control groups.

Median and Ulnar Nerve Function in Tattoo Artists