REVISTA

Revisión sobre fármacos adyuvantes a los anestésicos locales en los bloqueos nerviosos

Descripción: La adición de adrenalina produce un efecto más largo; el bicarbonato según el anestésico local utilizado; el tramadol, la buprenorfina o la dexametasona parecen ser efectivos en algunos casos mientras que el midazolam, la dexmedetomidina o la ketamine no son recomendados de rutina.

TITULO FUENTE ORIGINAL:

Additives to local anesthetics for peripheral nerve blocks: Evidence, limitations, and recommendations.

AUTORES:

Bailard NS, Ortiz J, Flores RA.

REVISTA ABREV.:

Am J Health Syst Pharm.

AÑO:

2014

REFERENCIA:

Mar 1;71(5):373-85.

DOI:

10.2146/ajhp130336.

FECHA DE PUBLICACIÓN:

01/03/2014

RESUMEN ORIGINAL:

PURPOSE:
The therapeutic rationale, clinical effectiveness, and potential adverse effects of medications used in combination with local anesthetics for peripheral nerve block therapy are reviewed.
SUMMARY:
A wide range of agents have been tested as adjuncts to peripheral nerve blocks, which are commonly performed for regional anesthesia during...
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PURPOSE:
The therapeutic rationale, clinical effectiveness, and potential adverse effects of medications used in combination with local anesthetics for peripheral nerve block therapy are reviewed.
SUMMARY:
A wide range of agents have been tested as adjuncts to peripheral nerve blocks, which are commonly performed for regional anesthesia during or after hand or arm surgery, neck or spine surgery, and other procedures. Studies to determine the comparative merits of nerve block adjuncts are complicated by the wide variety of coadministered local anesthetics and sites of administration and by the heterogeneity of primary endpoints. Sodium bicarbonate has been shown to speed the onset of mepivacaine nerve blocks but delay the onset of others. Epinephrine has been shown to prolong sensory nerve blockade and delay systemic uptake of local anesthetics, thus reducing the risk of anesthetic toxicity. Tramadol, buprenorphine, dexamethasone, and clonidine appear to be effective additives in some situations. Midazolam, magnesium, dexmedetomidine, and ketamine cannot be routinely recommended as nerve block additives due to a dearth of supportive data, modest efficacy, and (in the case of ketamine) significant adverse effects. Recent studies suggest that administering additives intravenously or intramuscularly can provide many of the benefits of perineural administration while reducing the potential for neurotoxicity, contamination, and other hazards.
CONCLUSION:
Some additives to local anesthetics can hasten the onset of nerve block, prolong block duration, or reduce toxicity. On the other hand, poorly selected or unnecessary additives may not have the desired effect and may even expose patients to unnecessary risks.

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