Ropivacaine Volume for Ultrasound-guided Retrograde Infraclavicular Brachial Plexus Block
|ClinicalTrials.gov Identifier: NCT01334619|
Recruitment Status : Completed
First Posted : April 13, 2011
Last Update Posted : April 13, 2011
|Condition or disease||Intervention/treatment||Phase|
|Upper Extremity Injury Trauma||Procedure: appropriate volume of 0.5% ropivacaine||Phase 4|
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||30 participants|
|Intervention Model:||Single Group Assignment|
|Official Title:||Ropivacaine Volume for Ultrasound-guided Retrograde Infraclavicular Brachial Plexus Block|
|Study Start Date :||March 2010|
|Primary Completion Date :||April 2010|
|Study Completion Date :||May 2010|
|ropivacaine volume titration||
Procedure: appropriate volume of 0.5% ropivacaine
initial concentration: 30 ml, subsequently varied at a ratio of 1: 1.2 for each consecutive patient according to the response of the previous patient, until 5 up-and-down cycles completed.
Other Name: Naropin
- VAS of brachial plexus innervated area [ Time Frame: 20 minutes ]effect and side effects of the present block approach for brachial plexus.
- medium effective ropivacaine volume [ Time Frame: about 2 months ]The initial concentration of 0.5% ropivacaine injected was 30 ml, which was subsequently varied at a ratio of 1: 1.2 for each consecutive patient according to the response of the previous patient. The medium effective volume (EV50) was determined using the Dixon and Massey up-and-down method. EV95 was calculated using probit regression.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01334619
|Beijing jishuitan hospital|
|Beijing, China, 100035|
|Principal Investigator:||Xiaoguang Zhang, MB||Department of Anesthesiology, Beijing Jishuitan Hospital, Beijing, China|