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- T Yusa, Y Taira, T Sasara, and K Yoza.
- Department of Anesthesiology, University of the Ryukyus School of Medicine, Okinawa.
- Masui. 1990 Oct 1; 39 (10): 1325-32.
AbstractThe effect of intratracheal lidocaine spray (0.5, 1.0, 2.0 mg.kg-1) on blood pressure and heart rate changes to endotracheal intubation was evaluated in 20 ASA I-II patients. After thiamylal induction, 15 patients received lidocaine spray with LTA kit. Mean arterial blood pressure and heart rate were recorded for 10 min every 30 sec and analysis of plasma lidocaine concentrations were also performed. In the control group, mean arterial blood pressure increased significantly compared with the pre-anesthetic values for one min, and with all spray groups at one min after intubation. Heart rate increased significantly at 30 sec after intubation only in the control group. Since the plasma lidocaine concentrations at intubation were below 1.5 micrograms.ml-1, we conclude that intratracheal lidocaine spray depresses the circulatory response to intubation by its local surface analgesic effect.
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