Diaphragmatic paralysis, respiratory function, and postoperative pain after interscalene brachial plexus block with a reduced dose of 10 ml levobupivacaine 0.25% versus a 20 ml dose in patients undergoing arthroscopic shoulder surgery: study protocol for the randomized controlled double-blind REDOLEV study

Table 1 Participant timeline of REDOLEV-2019 Clinical Trial

	Study period
	Enrolment	IBPB	Post-allocation		Close-out
Timepoint	Before surgery	0	4 h	24 h	30 days
Enrolment:
Eligibility screen	X
Informed consent	X
Medical background	X
Random Allocation	X
Interventions:
G1: IBPB 20 ml		X
G2: IBPB 10 ml		X
Assessments:
US: DTR, ED (n°esp) and ED (type)	X		X
Spirometry (FVC and FEV1)	X		X	X
Pain: 24 h total consumption and time to first request.			X	X
Complications			X	X	X

This template is copyrighted by the SPIRIT Group. Abbreviations: DE diaphragmatic excursion, DTR diaphragmatic thickness ratio, FVC forced vital capacity, FEV1 forced expiratory volume at 1 s, IBPB interscalene brachial plexus block

ISSN: 1745-6215