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Local anaesthetic adjuvants: neuraxial versus peripheral nerve block
Univ Hosp, Dept Anesthesiol and Intens Care, SE-70185 Orebro, Sweden.
Linköping University, Department of Medical and Health Sciences, Anesthesiology. Linköping University, Faculty of Health Sciences.
2009 (English)In: Current Opinion in Anaesthesiology, ISSN 0952-7907, E-ISSN 1473-6500, Vol. 22, no 5, 649-654 p.Article in journal (Refereed) Published
Abstract [en]

Purpose of review To present a review of the literature on the importance and the clinical characteristics relevant to adjuvants added to local anaesthetics in neuraxial and peripheral nerve blocks. Recent findings In neuraxial anaesthesia, both opioids and alpha-2 receptor agonists have beneficial effects. Intrathecally, fentanyl and sufentanil not only improve the postoperative analgesia but also make it possible to allow a decrease in the local anaesthetic dose. When clonidine or dexmedetomidine was added to intrathecal local anaesthetics, the regression of sensory, motor block increased dose-dependently and postoperative analgesia was prolonged. The potency of intrathecal clonidine:dexmedetomidine seems to be 10:1. In peripheral nerve block, when opioid was combined with local anaesthetics, no increased improvement in analgesia was reported in comparison with systemic controls in most of the studies, except buprenorphine. Also clonidine is controversial as an analgesic adjuvant. Special factors, such as type of local anaesthetics, block of upper or lower limb, are important for its the beneficial effect. Other adjuvants, except neuraxial low-dose neostigmine, are of minor importance. Summary Opioids and alpha-2 receptor agonists are important as neuraxial adjuvants to improve the quality of peroperative and postoperative analgesia in high-risk patients and in ambulatory procedures. In peripheral nerve blocks, however, some benefit is found only when clonidine is added to local anaesthetics under certain circumstances.

Place, publisher, year, edition, pages
2009. Vol. 22, no 5, 649-654 p.
Keyword [en]
adjuvants; anaesthesia; drugs; neuraxial block; opioids; peripheral nerve block; regional anaesthesia
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-53852DOI: 10.1097/ACO.0b013e32832ee847ISI: 000270051500018OAI: diva2:292423
Available from: 2010-02-06 Created: 2010-02-06 Last updated: 2012-01-06

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