Electroencephalographic arousal response during tracheal intubation and laryngeal mask airway insertion after induction of anaesthesia with propofol
✍ Scribed by T. Inada; K. Shingu; S. Nakao; T. Hirose; A. Nagata
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 275 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0003-2409
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✦ Synopsis
Laryngoscopy and tracheal intubation, or insertion of a laryngeal mask airway may lead to an arousal response on the electroencephalogram. We studied whether more intense stimulation (laryngoscopy and tracheal intubation) causes a greater arousal response than less intense stimulation (laryngeal mask airway insertion). Thirty‐four patients (ASA I–II) were anaesthetised with propofol 3 mg.kg^−1^, followed by vecuronium 0.15 mg.kg^−1^ and a propofol infusion of 10 mg.kg^−1^.h^−1^. Three minutes after induction of anaesthesia, either laryngoscopy and tracheal intubation (n = 18), or laryngeal mask airway insertion (n = 16) was performed. Laryngoscopy and tracheal intubation caused a significantly greater increase in blood pressure (but not heart rate) than laryngeal mask airway insertion (p < 0.05). Electroencephalogram responses were not different. More intense stimulation does not cause a greater arousal response during propofol anaesthesia.