Effect of regional versus local anaesthesia on outcome after arteriovenous fistula creation: a randomised controlled trial (original) (raw)

Aitken, Emma, Jackson, Andrew, Kearns, Rachel ORCID: https://orcid.org/0000-0001-6156-6858, Steven, Mark, Kinsella, John, Clancy, Marc and MacFarlane, Alan ORCID: https://orcid.org/0000-0003-3858-6468(2016) Effect of regional versus local anaesthesia on outcome after arteriovenous fistula creation: a randomised controlled trial.Lancet, 388(10049), pp. 1067-1074. (doi: 10.1016/S0140-6736(16)30948-5) (PMID:27492881)

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Abstract

Background: Arteriovenous fistulae are the optimum form of vascular access in end-stage renal failure. However, they have a high early failure rate. Regional compared with local anaesthesia results in greater vasodilatation and increases short-term blood flow. This study investigated whether regional compared with local anaesthesia improved medium-term arteriovenous fistula patency. Methods: This observer-blinded, randomised controlled trial was done at three university hospitals in Glasgow, UK. Adults undergoing primary radiocephalic or brachiocephalic arteriovenous fistula creation were randomly assigned (1:1; in blocks of eight) using a computer-generated allocation system to receive either local anaesthesia (0·5% L-bupivacaine and 1% lidocaine injected subcutaneously) or regional (brachial plexus block [BPB]) anaesthesia (0·5% L-bupivacaine and 1·5% lidocaine with epinephrine). Patients were excluded if they were coagulopathic, had no suitable vessels, or had a previous failed ipsilateral fistula. The primary endpoint was arteriovenous fistula patency at 3 months. We analysed the data on an intention-to-treat basis. This study was registered with ClinicalTrials.gov (NCT01706354) and is complete. Findings: Between Feb 6, 2013, and Dec 4, 2015, 163 patients were assessed for eligibility and 126 patients were randomly assigned to local anaesthesia (n=63) or BPB (n=63). All patients completed follow-up on an intention-to-treat basis. Primary patency at 3 months was higher in the BPB group than the local anaesthesia group (53 [84%] of 63 patients vs 39 [62%] of 63; odds ratio [OR] 3·3 [95% CI 1·4–7·6], p=0·005) and was greater in radiocephalic fistulae (20 [77%] of 26 patients vs 12 [48%] of 25; OR 3·6 [1·4–3·6], p=0·03). There were no significant adverse events related to the procedure. Interpretation: Compared with local anaesthesia, BPB significantly improved 3 month primary patency rates for arteriovenous fistulae.

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