Geneva, Jan. 12 -- International Clinical Trials Registry received information related to the study (ChiCTR2500114678) titled 'Comparison of the Effects of Different-Sided Stellate Ganglion Block on Healthy Subjects Based on Real-Time Heart Rate Variability: A Prospective, Randomized, Crossover Trial' on Dec. 16, 2025.

Study Type: Interventional study

Study Design: Cross-over

Primary Sponsor: Longgang District People's Hospital of Shenzhen

Condition: Insomnia

Intervention: Group A:Unilateral stellate ganglion block guided by ultrasound:The subject remains in a supine position with the head slightly extended. After skin disinfection, the puncture site and direction are located using an ultrasound device, followed by an injection of...