System and method for tracking anesthetic agent in a vaporizer reservior
AssigneeGE Precision Healthcare LLC
InventorsJulie Anne Mills, Joseph Lacey, Thomas Bender, II, Russell Kuzelka, David Michael Wahl
Life of this patent
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Abstract
A system for tracking anesthetic agent in a vaporizer reservoir can include a mass flow sensor configured to measure a flow rate entering or exiting a vaporizer chamber, a gas pressure sensor configured to measure a pressure of a mixed gas provided from the vaporizer chamber, and a processor to calculate a remaining agent time based on at least the gas flow rate, the pressure of the mixed gas, and an anesthetic concentration in the mixed gas. The processor can also provide the remaining agent time for display to a clinician.
Claims17
An anesthetic agent tracking system for tracking anesthetic agent in a vaporizer reservoir within an anesthesia vaporizer system, the anesthetic agent tracking system comprising:
- a mass flow sensor configured to measure a gas flow rate entering or exiting a vaporizer chamber;
- a gas pressure sensor configured to measure a pressure of a mixed gas provided from the vaporizer chamber;
- and
- a processor to:
- calculate a remaining agent time based on at least the gas flow rate, the pressure of the mixed gas, and an anesthetic concentration in the mixed gas;
- configured to provide the remaining agent time for display to a clinician;
- receive an initial agent amount;
- track a dispensed agent amount based on the gas flow rate, the pressure of the mixed gas, a temperature of the mixed gas, and the anesthetic concentration in the mixed gas;
- calculate a current agent amount based on the initial agent amount and the dispensed agent amount;
- and
- calculate the remaining agent time based further on the current agent amount.
An anesthetic agent tracking system for tracking anesthetic agent in a vaporizer reservoir within an anesthesia vaporizer system, the system comprising:
- an injector pressure sensor configured to sense a pressure of the anesthetic agent provided to an injector delivering a liquid anesthetic agent to a vaporizer chamber;
- an injector temperature sensor configured to sense a temperature of the anesthetic agent provided to the injector;
- and
- a processor to:
- identify a current agent amount;
- calculate a remaining agent time based on the pressure of the anesthetic agent, the temperature of the anesthetic agent, an orifice size of the injector, and at least one of an injection frequency or an injection duration of the injector;
- and
- configure to provide the remaining agent time for display to a clinician.
A method for tracking anesthetic agent in a vaporizer reservoir within an anesthesia vaporizer system, the method comprising:
- measuring a gas flow rate entering or exiting a vaporizer chamber;
- measuring a pressure of a mixed gas provided from the vaporizer chamber;
- identifying an anesthetic concentration in the mixed gas provided from the vaporizer chamber, wherein identifying the anesthetic concentration comprises measuring, with a vaporizer gas concentration sensor, the anesthetic concentration in the mixed gas provided from the vaporizer chamber, or receiving a concentration setting for controlling delivery of an anesthetic agent from the vaporizer chamber;
- identifying a current agent amount of the anesthetic agent in the vaporizer reservoir;
- calculating a dispense rate based on the anesthetic concentration, the gas flow rate, and the pressure of the mixed gas;
- calculating a remaining agent time based on at least the current agent amount and the dispense rate;
- providing the remaining agent time for display to a clinician;
- measuring a pressure of the anesthetic agent provided to an injector delivering anesthetic agent to the vaporizer chamber;
- measuring a temperature of the anesthetic agent provided to the injector;
- and
- calculating a secondary remaining agent time based on the current agent amount, the pressure of the anesthetic agent, the temperature of the anesthetic agent, an orifice size of the injector, and at least one of an injection frequency and an injection duration of the injector.
Dependencies are inferred from the claim text.