90
Participants
Start Date
September 1, 2016
Primary Completion Date
November 9, 2017
Study Completion Date
December 28, 2017
Open TPVB
In Group E,the thoracic paravertebral block was performed under the direct vision with 0.25% ropivacaine 30 ml,and the Patient-controlled intravenous analgesia was administer after the surgery.
Ultrasound-guided TPVB
In Group U, thoracic paravertebral block was performed on the operated side under ultrasound guidance with 0.25% ropivacaine 30 ml,and the Patient-controlled intravenous analgesia was administer after the surgery.
placebo
In Group G,patients were just received Patient-controlled intravenous analgesia after the surgery.
Kunming Medical University
OTHER