Kidney Failure, Chronic Clinical Trial
Official title:
A Randomised Controlled Trial Comparing Ultrasound-guided Supraclavicular Brachial Plexus Block With Combined Supraclavicular and Pecs II Block in Patients Undergoing Arteriovenous Grafting Surgery
This study evaluates the addition of Pecs II block to ultrasound-guided supraclavicular brachial plexus block in patients undergoing arteriovenous graft creation surgery. Participants will be randomised into two equal groups, one receiving supraclavicular and pecs II blocks, the other receiving supraclavicular block and sham block (Grade 1).
Regional anaesthesia (RA) for arteriovenous grafting surgery has advantages of avoiding risks
of general anaesthesia (GA) in this group of patients with significant co-morbidities, and
beneficial vasodilatation, which may prevent early fistula thrombosis. Hence, RA is
preferable to GA for this surgery.
Brachial plexus blocks (BPB) are the most commonly employed RA technique to anaesthetise the
upper limb for this surgery. According to the results of a recent 2-year retrospective audit
in our centre, ultrasound-guided supraclavicular BPB are the most popular RA technique for
this surgery. Anatomically, the T1 and T2 dermatomes are often missed by the supraclavicular
BPB. This means that the upper medial arm and axilla (sites involved in brachiobasilic and
brachioaxillary arteriovenous grafting) may not be adequately anaesthetised, mandating
intraoperative local anaesthetic supplementation by the surgeon. This may affect patients'
and surgeons' acceptance of, and satisfaction with the RA technique. The ultrasound-guided
Pecs II block, described by Blanco et al, seems to address this problem, as the intercostal
T1-6, intercostobrachialis, long thoracic nerves and nerve to serratus anterior are targeted
by this block.
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