Paradoxical changes in bispectral index during nitrous oxide administration.
نویسنده
چکیده
I report two patients undergoing open heart surgery, with nitrous oxide and isoflurane anaesthesia, for whom bispectral index (BIS) monitoring showed high BIS values with nitrous oxide and isoflurane anaesthesia. The BIS decreased immediately after nitrous oxide was stopped and increased again after nitrous oxide was restarted.
منابع مشابه
Increasing isoflurane concentration may cause paradoxical increases in the EEG bispectral index in surgical patients.
We have studied the effects of increases in isoflurane concentration on the EEG bispectral index (BIS) in 70 patients anaesthetized with isoflurane-nitrous oxide-sufentanil for major abdominal surgery. During surgery, baseline BIS was recorded at 0.8% end-tidal isoflurane with nitrous oxide in oxygen (FIO2 0.35). After this, end-tidal isoflurane was increased to 1.6% for 15 min and decreased su...
متن کاملPropofol Requirement during Propofol and Butorphanol Anesthesia with and without Nitrous Oxide in Short Duration Intracranial Surgeries: A Bispectral Index Guided Study
Neurosurgical anesthesia; Nitrous oxide; Bispectral index
متن کاملNitrous oxide does not alter bispectral index: study with nitrous oxide as sole agent and as an adjunct to i.v. anaesthesia.
We have studied the effect of nitrous oxide on bispectral index (BIS), calculated from a bipolar encephalogram. Inhalation of 70% nitrous oxide resulted in loss of consciousness in all healthy volunteers (n = 10) but no change in BIS. Brief inhalation up to 1.2% sevoflurane also resulted in loss of consciousness in volunteers (n = 5), but with sevoflurane, BIS decreased. BIS and the haemodynami...
متن کاملV. 'For now we see through a glass, darkly': the anaesthesia syndrome.
J Neurosci Methods 2007; 160: 215–22 17 Shafer SL, Hendrickx JF, Flood P, Sonner J, Eger EI II. Additivity versus synergy: a theoretical analysis of implications for anesthetic mechanisms. Anesth Analg 2008; 107: 507–24 18 Kuhlmann L, Foster BL, Liley DT. Modulation of functional EEG networks by the NMDA antagonist nitrous oxide. PLoS One 2013; 8: e56434 19 Barr G, Jakobsson JG, Owall A, Anders...
متن کاملNitrous Oxide Sedation and Bispectral Index
OBJECTIVES To determine whether bispectral analysis (BIS) changes during nitrous oxide (N(2)O) sedation in anxious children undergoing extraction of primary teeth. METHODS In this prospective study 45, ASA physical status I children, aged between 7 to 12 years and scheduled for primary teeth extraction under N(2)O/O(2) sedation are included. At baseline (T0) and during the sedation procedure ...
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ورودعنوان ژورنال:
- British journal of anaesthesia
دوره 86 1 شماره
صفحات -
تاریخ انتشار 2001