title: The bispectral index response to tracheal intubation is similar in normotensive and hypertensive patients.
abstract: OBJECTIVE
  To compare the hemodynamic and bispectral index (BIS) responses to tracheal intubation in normotensive and hypertensive patients.
  
  
  METHODS
  Three minutes after induction of anesthesia with thiamylal and fentanyl, tracheal intubation was performed in 24 normotensive and 22 hypertensive patients. Heart rate (HR), mean arterial pressure (MAP), and BIS were measured every minute.
  
  
  RESULTS
  Tracheal intubation increased HR, MAP, and BIS in both normotensive and hypertensive patients. The increase in MAP was significantly greater in hypertensive patients than in normotensive patients, but there were no differences in HR or BIS in the two groups of patients.
  
  
  CONCLUSIONS
  Patients with and without hypertension exhibit the same arousal response (as measured by BIS) to tracheal intubation despite the enhanced vasopressor response in hypertensive patients.
authors: Department of Anesthesiology, Sapporo Medical University School of Medicine, Sapporo, Japan. miyab@zc4.so-net.ne.jp
authors: Masayasu
authors: M
authors: Nakayama
authors: Hiromichi
authors: H
authors: Ichinose
authors: Shuji
authors: S
authors: Yamamoto
authors: Noriaki
authors: N
authors: Kanaya
authors: Akiyoshi
authors: A
authors: Namiki
mesh_terms: D000328:Adult; D000768:Anesthesia, General; D001143:Arousal / Q000502:physiology; D001794:Blood Pressure / Q000502:physiology; D004569:Electroencephalography; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006439:Hemodynamics / Q000502:physiology; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*; D007442:Intubation, Intratracheal / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative; D013997:Time Factors