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Fig. 1 | Trials

Fig. 1

From: Effects of C8 nerve root block during interscalene brachial plexus block on anesthesia of the posterior shoulder in patients undergoing arthroscopic shoulder surgery: study protocol for a prospective randomized parallel-group controlled trial

Fig. 1

The SPIRIT flow diagram: the schedule of enrolment, interventions, and assessments. t1 is before the placement of the interscalene brachial plexus block. t2 is when the interscalene brachial plexus block is placed. t3 is 30 min after the placement of the interscalene brachial plexus block. t4 is during surgery. t5 is on admission to the postanesthetic care unit. t6 is on discharge from the postanesthetic care unit. t7 is between 6 and 12 h after surgery. t8 is 24 h after surgery. * Forced expiratory volume at 1 s (FEV1) and FEV1/forced vital capacity. † Including worst numerical pain rating score.

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