Ultrasound-guided supraclavicular block versus Bier block for emergency reduction of upper limb injuries: a protocol for an open-label, non-inferiority, randomised controlled trial

Table 3 Potential harm/adverse effects

UGSCB	BB
Pain during injection and bruising	Pain during insertion intravenous catheter
Infection	Discomfort of cuff inflation
Injury to major blood vessels or nerves	Infection
Puncture of the lungs	Local bruising
Respiratory distress from phrenic nerve paralysis	Methaemoglobinaemia
Local anaesthetic toxicity	Local anaesthetic toxicity

ISSN: 1745-6215