Patent ID: 8582107
Filing Date: 2013-11-12
Classification: A61M

Abstract:
1. A method of detecting a level of anesthetic agent in an anesthesia vaporizer, the anesthetic agent forming a column liquid within an external indicator, the external indicator positioned adjacent to the anesthesia vaporizer, the external indictor coupled to the anesthesia vaporizer, the external indicator composed of material allowing the column of liquid to be detectable, the column of liquid being indicative of an amount of anesthetic agent contained within the anesthesia vaporizer, the method comprising: projecting a beam of light into the external indicator, receiving a reflection from the beam of light after the beam of light has made contact with the column of liquid, the reflection occurring before the beam passes through the liquid, detecting when the level of anesthetic agent drops below a predetermined level when the reflection of the beam of light increases due to the drop of the column of liquid.