AN Anesthesia Vaporizer is a device generally attached to an Anesthesia machine and delivers a concentration of a volatile anesthetic agents. It is designed to facilitate the change of an anesthetic from a liquid to a vapor.
Inhaled anesthetic agents include two different classes of chemicals: nitrous oxide and halogenated agents. Halogenated agents currently in use include halothane (Fluothane®), enflurane (Ethrane®), isoflurane (Forane®), desflurane (Suprane®), and sevoflurane (Ultane®). Methoxyflurane (Penthrane®), once in general use, is now only infrequently used primarily in veterinary procedures. At present, the Occupational Safety and Health Administration (OSHA) has no permissible exposure limits regulating these agents.  General work practices recommended for anesthetizing locations include the following:
- Vaporizers should be filled in a well-ventilated area and in a manner to minimize spillage of the liquid agent. This can be accomplished by using a specialized "key-fill" spout to pour the anesthetic into the vaporizer instead of pouring from a bottle into a funnel-fill vaporizer. When feasible, vaporizers should be filled at the location where the anesthetic will be administered and, when filled electively, with the fewest possible personnel present in the room. Vaporizers should be turned off when not in use.
Preventative Maintenance makes sense because Vaporizers are pneumatic devices which like an aircraft are subject to constant pressure variations. Not maintaining an aircraft is unthinkable, as is not maintaining a vaporizer.
- Seals Wear
- Gaskets Wear
- Calibration Fluctuates
- Contamination Occurs
- Leakage of anesthetic agent occurs
- Health and safety issues
- Economic loss
- Atmosphere pollution
- Regulatory Compliance
- Liability issues
Indications that Service is Required
- Control dial is difficult to turn.
- Dial turns freely with no output.
- Vapor percentage numbers are illegible OR worn.
- Leakage of liquid OR vapor.
- Smell of agent.
- Agent discoloration.
- Elapse of recommended service interval.
Calibration/Verification of Desflurane (Suprane), Sevoflurane, Isoflurane (Forane) and Halothane is performed with a calibrated anesthetic gas analyzer (i.e. RIKEN Model FI-21) to verify the delivered vapor concentrations under closely defined conditions at different temperatures in order to test the temperature compensating mechanism.
- Penlon Sigma Delta
- Draeger 2000
Second Source Parts
Second Source Services
DRE Med 
- ↑ US Dept of Labor. Anesthetic Gases: Guidelines for Workplace Exposures. May 18, 2000. 
- ↑ US Dept of Labor. Anesthetic Gases: Guidelines for Workplace Exposures. May 18, 2000.