oa Southern African Journal of Anaesthesia and Analgesia - A prospective, randomised, controlled clinical trial to evaluate the effect of nitrous oxide on propofol requirement in elective craniotomy in which entropy was used to measure depth of anaesthesia : research
|Article Title||A prospective, randomised, controlled clinical trial to evaluate the effect of nitrous oxide on propofol requirement in elective craniotomy in which entropy was used to measure depth of anaesthesia : research|
|© Publisher:||Medpharm Publications|
|Journal||Southern African Journal of Anaesthesia and Analgesia|
|Affiliations||1 Indraprastha Apollo Hospitals, India, 2 Indraprastha Apollo Hospitals, India, 3 Indraprastha Apollo Hospitals, India, 4 Indraprastha Apollo Hospitals, India and 5 Indraprastha Apollo Hospitals, India|
|Publication Date||Jan 2016|
|Pages||16 - 22|
|Keyword(s)||Anaesthesia depth, Entropy, Intracranial surgery, Nitrous oxide and Propofol|
Background: Propofol is known to have a favourable effect on cerebral haemodynamics. The role of nitrous oxide (N2O) in neurosurgical anaesthesia is still being debated. The primary aim of this study was to assess the dose-sparing effect of N2O on propofol infusion maintenance dosing.
Method: Fifty American Society of Anesthesiology (ASA) grade I and II adults scheduled for elective craniotomies for supratentorial tumours were enrolled in the study. The patients received a standard anaesthetic comprising a fentanyl 2 μg/kg bolus prior to propofol induction. Anaesthesia was maintained with an infusion of fentanyl (2 μg/kg/hour), atracurium and propofol. The patients were randomised into two groups. Group A received 67% N2O. Group B did not receive N2O concomitantly with the propofol infusion. Entropy was used to guide the titration of the propofol infusion in both groups.
Results: The propofol maintenance dose requirements were 47% lower in Group A (54.30 ± 11.47 μg/kg/minute) vs. Group B (102.30 ± 14.00 μg/kg/minute), (p < 0.001).
Conclusion: The use of supplemental N2O significantly decreased propofol infusion rate requirements, compared with the propofol infusion alone, in ASA I and II patients undergoing elective supratentorial tumour excision.
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