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  • Title: [Efficacy of topical administration of lidocaine through a Malinckrodt Hi-Lo Jet tube in lessening cough during recovery from general anesthesia].
    Author: Viguera M, Diakum TA, Shelsky R, Casals P, Cochs J, Faulí A.
    Journal: Rev Esp Anestesiol Reanim; 1992; 39(5):316-8. PubMed ID: 1410755.
    Abstract:
    To achieve tracheal anesthesia during intubation, an endotracheal tube was purposely designed. The tube had multiple laser-induced perforations in its lower portion produced that allowed administration of the local anesthetic in a pulverized form. We evaluated the efficacy of lidocaine 2% in preventing cough during recovery from general anesthesia. The goal of this study was to perform a topical anesthesia of the hypopharynx, larynx, and trachea. This attenuates the laryngeal reflex occurring during anesthesia recovery and therefore, prevents from potential complications. Sixteen patients ASA I-II underwent surgery with general anesthesia. They were prospectively studied following a randomized double blind protocol. The control group received saline infusion (n = 6) whereas the experimental group (n = 10) was treated with lidocaine. At the end of the anesthesia period, the presence of cough was treated with the test solution. In 90% of cases treated with lidocaine, cough disappeared in about 30 seconds and patients tolerated the endotracheal tube until extubation was performed. All patients who received saline solution presented cough until extubation.
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