Effect of nitrous oxide use on long-term neurologic and neuropsychological outcome in patients who received temporary proximal artery occlusion during cerebral aneurysm clipping surgery. Academic Article Article uri icon

Overview

MeSH

  • Adult
  • Balloon Occlusion
  • Female
  • Follow-Up Studies
  • Humans
  • Male
  • Middle Aged
  • Prospective Studies
  • Surgical Instruments
  • Treatment Outcome

MeSH Major

  • Cerebral Arteries
  • Intracranial Aneurysm
  • Nervous System Diseases
  • Neuropsychological Tests
  • Neurosurgical Procedures
  • Nitrous Oxide
  • Postoperative Complications

abstract

  • The authors explored the relationship between nitrous oxide use and neurologic and neuropsychological outcome in a population of patients likely to experience intraoperative cerebral ischemia: those who had temporary cerebral arterial occlusion during aneurysm clipping surgery. A post hoc analysis of a subset of the data from the Intraoperative Hypothermia for Aneurysm Surgery Trial was conducted. Only subjects who had temporary arterial occlusion during surgery were included in the analysis. Metrics of short-term and long-term (i.e., 3 months after surgery) outcome were evaluated via both univariate and multivariate logistic regression analysis. An odds ratio (OR) greater than 1.0 denotes a worse outcome in patients receiving nitrous oxide. The authors evaluated 441 patients, of which 199 received nitrous oxide. Patients receiving nitrous oxide had a greater risk of delayed ischemic neurologic deficits (i.e., the clinical manifestation of vasospasm) (OR, 1.78, 95% confidence interval [CI], 1.08-2.95; P = 0.025). However, at 3 months after surgery, there was no difference in any metric of gross neurologic outcome: Glasgow Outcome Score (OR, 0.67; CI, 0.44-1.03; P = 0.065), Rankin Score (OR, 0.74; CI, 0.47-1.16; P = 0.192), National Institutes of Health Stroke Scale (OR, 1.02; CI, 0.66-1.56; P = 0.937), or Barthel Index (OR, 0.69; CI, 0.38-1.25; P = 0.22). The risk of impairment on at least one test of neuropsychological function was reduced in those who received nitrous oxide (OR, 0.56; CI, 0.36-0.89; P = 0.013). In this patient population, use of nitrous oxide was associated with an increased risk for the development of delayed ischemic neurologic deficits; however, there was no evidence of detriment to long-term gross neurologic or neuropsychological outcome.

authors

publication date

  • March 2009

has subject area

  • Adult
  • Balloon Occlusion
  • Cerebral Arteries
  • Female
  • Follow-Up Studies
  • Humans
  • Intracranial Aneurysm
  • Male
  • Middle Aged
  • Nervous System Diseases
  • Neuropsychological Tests
  • Neurosurgical Procedures
  • Nitrous Oxide
  • Postoperative Complications
  • Prospective Studies
  • Surgical Instruments
  • Treatment Outcome

Research

keywords

  • Comparative Study
  • Journal Article
  • Multicenter Study
  • Randomized Controlled Trial

Identity

Language

  • eng

PubMed Central ID

  • PMC2735401

Digital Object Identifier (DOI)

  • 10.1097/ALN.0b013e318197ff81

PubMed ID

  • 19212259

Additional Document Info

start page

  • 563

end page

  • 573

volume

  • 110

number

  • 3