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Korean J Anesthesiol > Volume 48(6); 2005 > Article
Korean Journal of Anesthesiology 2005;48(6):614-618.
DOI: https://doi.org/10.4097/kjae.2005.48.6.614   
The Effect of Lidocaine on Propofol-induced Hemodynamic Changes during Induction of Anesthesia in Elderly Patients.
Seong Heon Lee, Hong Beom Bae, Chang Young Jeong, Sung Su Chung, Kyung Yeon Yoo
1Department of Anesthesiology and Pain Medicine, Medical School, Chonnam National University, Gwangju, Korea. kyyoo@chonnam.ac.kr
2Department of Anesthesiology School of Dentistry, Chonnam National University, Gwangju, Korea.
Abstract
BACKGROUND
Propofol has a high incidence of pain when administered by intravenous injection. Among the many different methods available, lidocaine is used most frequently to minimize this pain. Propofol also has a depressant action on hemodynamics, especially in the elderly. The present study was aimed to examine whether lidocaine affects hemodynamic changes associated with propofol injection and endotracheal intubation, and whether it attenuates propofol-induced pain.
METHODS
Eighty patients, over 60 years old, ASA physical status I and II, were randomly divided into four groups of 20 each according to lidocaine dosage mixed with 2 mg/kg of propofol given over 30 seconds during the induction of anesthesia; 0 mg (control group), 20 mg, 40 mg and 80 mg. Mean arterial blood pressure (MAP), heart rate (HR), and bispectral index scale (BIS) were measured before anesthetic induction (baseline value), 1 minute after the start of induction, immediately before endotracheal intubation, and then every minute for 5 minutes. Injection pain was scored as none, mild, moderate, or severe.
RESULTS
MAP decreased significantly following the propofol injection and then increased after endotracheal intubation in all four groups, the magnitude of this decrease did not differ among the groups. HR increased after the propofol injection and then decreased. It increased again after intubation in all four groups. BIS was decreased by the induction of anesthesia, but was not affected by endotracheal intubation in any group. The three lidocaine groups had a lower incidence and severity of propofol-induced pain than the control group, and the effect were comparable among the lidocaine-treated groups.
CONCLUSIONS
Our results indicate that lidocaine 20, 40 or 80 mg mixed with propofol does not affect the hemodynamic changes associated with propofol and endotracheal intubation, but that they similarly attenuate the injection pain associated with propofol.
Key Words: bispectral index; elderly; hemodynamic changes; injection pain; lidocaine; propofol
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