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  • Title: Topical anesthesia.
    Author: Keyes PD, Tallon JM, Rizos J.
    Journal: Can Fam Physician; 1998 Oct; 44():2152-6. PubMed ID: 9805170.
    Abstract:
    OBJECTIVE: To consider topical anesthetic options available to primary care physicians, indications for their use, and efficacy and safety of these agents as supported by the literature. QUALITY OF EVIDENCE: Five randomized controlled trials were retrieved that compared various topical anesthetics as well as topical anesthetics versus infiltrative anesthesia. MAIN FINDINGS: A combination of lidocaine, epinephrine, and tetracaine (LET) is currently the topical anesthetic of choice for repair of simple lacerations involving the faces and scalps of children. A promising new topical preparation is bupivacaine and epinephrine, but its efficacy must be studied in larger populations before widespread use can be advocated. Using EMLA (eutectic mixture of local anesthetics) for repair of extremity lacerations requires further study and cannot yet be recommended. Continued use of topical tetracaine, adrenaline, and cocaine (TAC) is not supported in the literature, because of its greater expense, its status as a restricted narcotic, its potential for toxicity, and better availability of an equally efficacious alternative, LET. CONCLUSIONS: Children's simple facial and scalp lacerations can be safely repaired using topical LET gel. Physicians must adhere to recommendations to avoid mucous membrane contact and ensure appropriate dosing with these agents. Bupivacaine-epinephrine topical preparation is a promising analgesic agent that warrants further study.
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