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US 2015/0027439 A1Published application
Anesthetic vaporizer
AssigneeOregon Health & Science University
InventorsMichael Hutchens, Alkayed R. Nabil, II, Henry Casson, Katie Schenning
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Abstract
Disclosed herein is an anesthetic vaporizer comprising a refrigeration system configured to cool a liquid anesthetic to less than 0° C. and to the anesthetic's temperature of minimal alveolar concentration. Further disclosed are methods of administering a liquid anesthetic comprising cooling the liquid anesthetic to less than 0° C. and to the anesthetic's temperature of minimal alveolar concentration.
Claims20
An anesthetic vaporizer, comprising:
- a vessel configured to contain a liquid anesthetic, the vessel further comprising a fresh gas inlet, a mixed gas outlet, and a temperature probe;
- a refrigeration system configured to cool the liquid anesthetic in the vessel to less than 0° C., the refrigeration system further comprising a cooling apparatus configured to receive the vessel and a power source;
- and
- an electronic controlling device.
1 more element
A method of anesthetizing a subject, the method comprising:
- cooling the anesthetic to below 0° C.;
- and
- administering the cooled anesthetic to the subject using an anesthetic vaporizer.
An anesthetic vaporizer, comprising:
- a vessel configured to contain a liquid anesthetic, the vessel further comprising a fresh gas inlet, a mixed gas outlet, and a temperature probe;
- a refrigeration system configured to cool the liquid anesthetic in the vessel to less than 0° C., the refrigeration system further comprising a cooling apparatus configured to receive the vessel and a power source;
- and
- a controller configured to:
- receive user input to set a first concentration of the anesthetic;
- calculate a set temperature to achieve the temperature of minimal alveolar concentration of the anesthetic;
- and
- implement a proportional-integral-derivative controller to maintain the liquid anesthetic at the set temperature.
5 more elements
Dependencies are inferred from the claim text.