Journal article
Retraction Notice: Association of obesity with failure of ultrasound-guided axillary brachial plexus block: a two-centre, prospective, observational, cohort study
Anaesthesia, Vol.75(5), pp.683-683
12/03/2019
DOI: 10.1111/anae.14939
Abstract
The objective of this study was to evaluate whether the failure rate of ultrasound-guided axillary brachial plexus block is similar in obese patients compared with non-obese patients when performed as the primary anaesthetic technique. We recruited 105 obese (body mass index ≥ 30 kg.m
) and 144 non-obese patients to this prospective, observational, cohort study conducted at two Canadian centres. A perineural technique of axillary brachial plexus block was performed using 30 ml ropivacaine 0.5% under real-time ultrasound guidance. Sensory and motor block assessment was carried out every 5 min until 30 min after block completion in all four terminal nerve distributions (radial, median, ulnar and musculocutaneous nerve). A composite score consisting of three sensory points and three motor points was used for assessment in each nerve distribution. A failed block was defined as a score of less than 14 points out of a possible 16 points, or a sensory block score less than 7 out of 8 points 30 min after block completion. Thirty minutes after block completion, obese patients had a higher failure rate of 33.7% (34/101) compared with 17.8% (24/135) for non-obese patients, with a failure rate difference (95%CI) of 15.9% (6.4-27.1%) between the groups. The median (IQR [range]) time to achieve a successful block in obese patients was 25 (20-30 [5-30]) min, compared with non-obese patients at 20 (15-30 [5-30]) min (p = 0.003). Despite a higher sensory-motor failure rate as per the composite score, the axillary brachial plexus block provided adequate surgical anaesthesia as indicated by a low need for conversion to general anaesthetic in obese (8.6%) and non-obese patients (7.0%; p = 0.656). This study showed that despite ultrasound guidance, obese patients had a slower onset time and higher axillary brachial plexus block failure rate at 30 min compared with non-obese patients.
Details
- Title: Subtitle
- Retraction Notice: Association of obesity with failure of ultrasound-guided axillary brachial plexus block: a two-centre, prospective, observational, cohort study
- Creators
- V Uppal - Department of Anesthesia, Peri-operative Medicine and Pain Management, Dalhousie University, Nova Scotia Health Authority and IWK Health Centre, Halifax, NS, CanadaR V Sondekoppam - Department of Anesthesia, University of Iowa, Iowa City, IA, USAS Dhir - Department of Anesthesia and Peri-operative Medicine, St. Joseph's Health Care, Western University, London, ON, CanadaS P Mackinnon - Department of Psychology and Neuroscience, Dalhousie University, Halifax, NS, CanadaM K Kwofie - Department of Anesthesia, Peri-operative Medicine and Pain Management, Dalhousie University, Nova Scotia Health Authority and IWK Health Centre, Halifax, NS, CanadaS Retter - Department of Anesthesia, Peri-operative Medicine and Pain Management, Dalhousie University, Nova Scotia Health Authority and IWK Health Centre, Halifax, NS, CanadaL M Lopera - Department of Anesthesia and Peri-operative Medicine, St. Joseph's Health Care, Western University, London, ON, CanadaJ J Szerb - Department of Anesthesia, Peri-operative Medicine and Pain Management, Dalhousie University, Nova Scotia Health Authority and IWK Health Centre, Halifax, NS, CanadaD M McKeen - Department of Anesthesia, Peri-operative Medicine and Pain Management, Dalhousie University, Nova Scotia Health Authority and IWK Health Centre, Halifax, NS, Canada
- Resource Type
- Journal article
- Publication Details
- Anaesthesia, Vol.75(5), pp.683-683
- DOI
- 10.1111/anae.14939
- ISSN
- 0003-2409
- eISSN
- 1365-2044
- Comment
- Retracted by Anaesthesia, Volume75, Issue5, May 2020, Pages 683-683 https://doi.org/10.1111/anae.14939
- Language
- English
- Date published
- 12/03/2019
- Academic Unit
- Anesthesia
- Record Identifier
- 9984088507802771
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