Reinforcing a "low flow" anaesthesia policy with feedback can produce a sustained reduction in isoflurane consumption

Anaesth Intensive Care. 1998 Aug;26(4):371-6. doi: 10.1177/0310057X9802600405.


A three-month audit of isoflurane consumption at Palmerston North Hospital in 1994 showed an averaged vapour flow rate of approx 85 ml per minute of anaesthesia, equivalent to 1.4% isoflurane at six litres per minute. After purchasing volatile agent analysers, a program encouraging low flow anaesthesia and providing a report of the previous month's consumption rate was started in July 1996. The isoflurane averaged vapour flow rate was tracked over the following twenty-month period and fell by a sustained 65% to range around 30 +/- 5 ml/min, producing savings of approximately NZ$104,000 over this period.

MeSH terms

  • Anesthesia Department, Hospital / economics
  • Anesthesia, General / economics*
  • Anesthetics, Inhalation / administration & dosage*
  • Anesthetics, Inhalation / economics*
  • Costs and Cost Analysis
  • Drug Utilization Review*
  • Feedback
  • Humans
  • Isoflurane / administration & dosage*
  • Isoflurane / economics*
  • New Zealand
  • Outcome Assessment, Health Care


  • Anesthetics, Inhalation
  • Isoflurane