Fig. 2From: Effects of double vs triple injection on block dynamics for ultrasound-guided intertruncal approach to the supraclavicular brachial plexus block in patients undergoing upper limb arteriovenous access surgery: study protocol for a double-blinded, randomized controlled trialStandard Protocol Items: Recommendations for Interventional Trials. IA, intertruncal approach; SCB, supraclavicular block; DI, double injection; TI, triple injectionBack to article page