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  • Title: [Efficacy of EMLA cream, effect of time and place of application].
    Author: Martínez-Tellería A, Cano Serrano ME, Rufino Ruiz J.
    Journal: Rev Esp Anestesiol Reanim; 1999 Mar; 46(3):106-10. PubMed ID: 10228375.
    Abstract:
    OBJECTIVE: To evaluate the anesthetic efficacy of EMLA cream for alleviating pain associated with puncture and pressure in areas where venous catheters are normally inserted. MATERIAL AND METHODS: We performed a prospective, double blind study in 38 volunteers between 25 and 36 years of age, after obtaining informed consent. A 1.5 g dose of EMLA cream was applied to three sites on each patient: the back of the hand, the antecubital fossa and the side of the neck. Placebo cream with similar characteristics was applied to contralateral sites. Pain was evaluated on a visual analog scale (VAS, 0-10). Tactile sensitivity was assessed on a four-point scale (0 = no sensation; 1 = slight sensation; 2 = moderate, and 3 = strong). An analysis of variance study was performed to compare baseline scores to results over time, and placebo results to EMLA scores for each test site. RESULTS: The assessment of response to puncture and pressure gradually decreased over time for the sites where EMLA cream was applied, but not for the areas where placebo was applied. CONCLUSION: The efficacy of EMLA cream varies demonstrably depending on type of stimulus, site of application and time since application.
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