Ultrasound-assisted Versus Real-time Ultrasound-guided Combined Spinal-epidural Anesthesia in Elderly Patients

Conditions: Ultrasound Therapy; Complications Interventions: Procedure: Ultrasound-assisted localization, US-AS; Procedure: Real-time ultrasound guidance, US-RTG Sponsors: Tongji Hospital Not yet recruiting
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials