“…There were no studies using an infraclavicular approach for BPB. The details of BPB were recorded according to type of approach (axillary [ 17 , 18 , 20 , 21 , 24 – 26 , 28 – 31 ], interscalene [ 22 ], supraclavicular [ 16 , 19 , 23 , 27 ]), the technique used for nerve guidance (landmark [ 16 , 17 , 23 , 27 , 28 ], nerve stimulator [ 18 , 20 – 22 , 24 – 26 , 29 – 31 ] or ultrasound guidance [ 19 ]), type of LA (bupivacaine [ 16 , 27 ], levobupivacaine [ 20 , 22 ], lidocaine [ 19 , 24 ], mepivacaine [ 29 , 31 ], prilocaine [ 28 ], ropivacaine [ 18 , 23 , 25 , 26 , 30 ], or a mixture of LA agents [ 17 , 21 ]), dose of tramadol (50 mg [ 18 , 23 ], 100 mg, or 1.5 mg/kg [ 16 , 17 , 19 – 22 , 24 – 31 ]), and the definitions of sensory bl...…”