title: A quantitative assessment of how Canadian intensivists believe they utilize oxygen in the intensive care unit.
abstract: OBJECTIVE
  To investigate attitudes and practices regarding oxygen therapy in intensive care units (ICUs) and to devise quantitative descriptive indices.
  
  
  METHODS
  Canadian university-affiliated adult ICUs.
  
  
  METHODS
  Fifty-two medical directors of ICUs in 48 institutions.
  
  
  METHODS
  Structured postal questionnaire returned by 48 participants.
  
  
  RESULTS
  Attitudes, beliefs, and stated practices relating to oxygen use in ICUs were determined. Novel descriptors S-50min (minutes of oxygen saturation [Sao2] acceptable to >50% of respondents), F-50max (maximum F(IO)2 above which <50% of respondents would increase F(IO)2), and F-50min (minimum F(IO)2 below which <50% of respondents would decrease F(IO)2) were determined. All respondents believed that oxygen toxicity was a concern. Twenty-nine percent of respondents indicated that they did not always assess tissue oxygenation in critical cases. A stepwise reduction in acceptance of progressive desaturation and increasing duration of hypoxemia was found. Presented with a stable patient with Sao2 of 98%, the maximum level of F(IO)2 above which respondents stated that they would not increase the F(IO)2 was 0.41+/-0.17 (mean +/- SD). For stable patients with Sao2 of 85%, the minimum F(IO)2 below which respondents would not reduce F(IO)2 was 0.59+/-0.23 (mean +/- SD). F-50max was 0.8 vs. 0.5 for Sao2 of 80%-85% vs. 85%-90%, respectively; F-50min was 0.6 vs. 0.21 for Sao2 of 90%-95% vs. 95%-100%, respectively.
  
  
  CONCLUSIONS
  Considerable variation exists in the attitudes, beliefs, and stated practices relating to the management of oxygen therapy in the ICU. These data are amenable to quantitative description and illustrate the necessity for documentation of actual practice and development of support systems for decision-making in this and similar areas.
authors.affiliation: Department of Anaesthesia and the Medical-Surgical Intensive Care Unit, Toronto General Hospital, ON, Canada.
authors.forename: C
authors.initials: C
authors.lastname: Mao
authors.forename: D T
authors.initials: DT
authors.lastname: Wong
authors.forename: A S
authors.initials: AS
authors.lastname: Slutsky
authors.forename: B P
authors.initials: BP
authors.lastname: Kavanagh
mesh_terms: D000328:Adult; D001291:Attitude of Health Personnel; D002170:Canada; D003422:Critical Care; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D007362:Intensive Care Units; D010100:Oxygen / Q000008:administration & dosage*; D008486:Physician Executives; D010818:Practice Patterns, Physicians' / Q000706:statistics & numerical data; D012121:Respiration, Artificial; D012128:Respiratory Distress Syndrome / Q000628:therapy; D011795:Surveys and Questionnaires
chemical_list: D010100:Oxygen