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  • Title: The effects of intracuff lidocaine on endotracheal-tube-induced emergence phenomena after general anesthesia.
    Author: Fagan C, Frizelle HP, Laffey J, Hannon V, Carey M.
    Journal: Anesth Analg; 2000 Jul; 91(1):201-5. PubMed ID: 10866913.
    Abstract:
    UNLABELLED: Coughing during emergence from general anesthesia is a common clinical problem. We sought to determine whether inflating the endotracheal tube cuff with lidocaine would create a reservoir of local anesthetic, which might diffuse across the cuff membrane to anesthetize the mucosa, thus attenuating stimulation during extubation of the trachea. A total of 63 patients undergoing elective surgery were enrolled in a prospective, randomized, double-blinded study. After intubation of the trachea with an endotracheal tube, the cuff of the tube was inflated with either lidocaine 4%, saline, or air. After extubation, a blinded observer noted heart rate, blood pressure, oxygen saturation, end-tidal isoflurane concentration, and the incidence of coughing. Data were analyzed by using analysis of variance, Student's t-test, and the chi(2) test for multiple variables. The groups were demographically comparable. There was no difference in hemodynamic or oxygen saturation data between either group. The incidence of coughing was decreased in the lidocaine group for the time period of 4-8 min postextubation (P < 0.05). We conclude that inflation of the cuff of the endotracheal tube can reduce the incidence of coughing in the initial postextubation period, a finding that may benefit certain patient groups in which this is particularly desirable. IMPLICATIONS: Tracheal intubation with an endotracheal tube is often necessary during anesthesia. After intubation, inflating a cuff around the endotracheal tube maintains a seal. This can result in coughing during emergence from anesthesia. Our study shows that inflating the cuff of an endotracheal tube with lidocaine rather than air can reduce the incidence of postextubation coughing.
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