Ear zap device cuts opioid need after major surgery
Symptom relief
Completed
This study tested a small, disposable device that gently stimulates nerves in the ear to see if it could reduce the amount of strong painkillers (opioids) needed after open abdominal or pelvic surgery. 286 adults who had surgery for cancer or a liver transplant took part. The goa…
Phase: NA • Sponsor: Jacques E. Chelly • Aim: Symptom relief
Last updated Jun 27, 2026 13:02 UTC