Geneva, Sept. 21 -- International Clinical Trials Registry received information related to the study (ChiCTR2600132100) titled 'Percutaneous vagus nerve electric stimulation for rectal cancer surgery with less opioid use under brain wave index monitoring' on Sept. 9.

Study Type: Interventional study

Study Design: Parallel

Primary Sponsor: The First Affiliated Hospital of Zhengzhou University

Condition: Postoperative pain

Intervention: True stimulation group (T group):An earplug with electrode contacts will be inserted into the left ear, with the electrode contacts closely adhering to the conchal boat. The parameters will be set as follows: frequency 30 Hz, pulse width 300 µs, on for 60 seconds and off for 30 seconds. The inte...