Method and apparatus for monitoring respiratory gases during anesthesia
First Claim
1. A method of monitoring a patient during administration of anesthesia wherein said patient is connected to a breathing circuit, comprising:
- exposing at least one sensor to inspired and expired gases; and
detecting one or more target substances with said sensor,wherein at least one anesthetic agent is delivered intravenously, and wherein the one or more target substances are indicative of the at least one anesthetic agent.
3 Assignments
0 Petitions
Accused Products
Abstract
A method and system is provided for monitoring delivery of anesthesia (inhalational and intravenous) and detecting the depth of anesthesia wherein at least one anesthetic agent is absorbed in patient'"'"'s bloodstream during the administration of anesthesia, which includes sampling inspired and expired gas; analyzing the gas for concentration of at least one substance indicative of the anesthetic agent using sensor technology such as free (unmetabolized) anesthetic agent or its metabolites; determining the effect of the agent based on that concentration; and determining depth of anesthesia based thereon.
264 Citations
36 Claims
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1. A method of monitoring a patient during administration of anesthesia wherein said patient is connected to a breathing circuit, comprising:
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exposing at least one sensor to inspired and expired gases; and detecting one or more target substances with said sensor, wherein at least one anesthetic agent is delivered intravenously, and wherein the one or more target substances are indicative of the at least one anesthetic agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of monitoring a patient during administration of anesthesia wherein said patient is connected to a breathing circuit, comprising:
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exposing at least one sensor to inspired and expired gases; and detecting one or more target substances with said sensor, wherein at least one anesthetic agent is administered through said breathing circuit, and wherein at least one additional anesthetic agent is delivered intravenously.
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27. A method of monitoring a patient during intravenous administration of anesthesia wherein said patient is connected to a breathing circuit, comprising:
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exposing at least one sensor to inspired and expired gases; detecting one or more target substances with said sensor; and determining the depth of amnesia based on the concentration of at least one target substance detected in said expired gases, wherein the target substance is for amnesia.
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28. A method of monitoring a patient during intravenous administration of anesthesia wherein said patient is connected to a breathing circuit, comprising:
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exposing at least one sensor to inspired and expired gases; detecting one or more target substances with said sensor; and determining the depth of analgesia based on the concentration of at least one target substance detected in said expired gases, wherein the target substance is for analgesia.
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29. A method of monitoring a patient during intravenous administration of anesthesia wherein said patient is connected to a breathing circuit, comprising:
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exposing at least one sensor to inspired and expired gases; detecting one or more target substances with said sensor; and determining the depth of muscle relaxation based on the concentration of at least one target substance detected in said expired gases, wherein the target substance is for muscle relaxation.
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30. A method of monitoring a patient during administration of anesthesia wherein said patient is connected to a breathing circuit, comprising:
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exposing at least one sensor to inspired and expired gases; and detecting one or more target substances with said sensor, wherein said target substance is an unbound anesthetic agent and a metabolite of an anesthetic agent indicative of the anesthetic agent.
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31. A method of monitoring a patient during administration of anesthesia wherein said patient is connected to a breathing circuit, comprising:
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exposing at least one sensor to inspired and expired gases; detecting one or more target substances with said sensor; and assigning a numerical value to the concentration as analyzed upon reaching a level of anesthetic effect in said patient and, thereafter, assigning higher or lower values to the concentration based on its relative changes, wherein the detecting step comprises detecting both presence and concentration of the target substance, and wherein at least one anesthetic agent is delivered intravenously.
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32. A method of monitoring a patient during administration of anesthesia wherein said patient is connected to a breathing circuit, comprising:
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exposing at least one sensor to inspired and expired gases; detecting one or more target substances with said sensor; assigning a numerical value to the concentration as analyzed upon reaching a level of anesthetic effect in said patient and, thereafter, assigning higher or lower values to the concentration based on its relative changes; and monitoring the concentration by monitoring changes in said value and adjusting administration of anesthesia to maintain a desired anesthetic effect, wherein the detecting step comprises detecting both presence and concentration of the target substance, and wherein at least one anesthetic agent is delivered intravenously.
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33. A method of monitoring a patient during administration of anesthesia wherein said patient is connected to a breathing circuit, comprising:
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exposing a first sensor to inspired gases, wherein at least one inspired gas is an anesthetic agent; exposing a second sensor to expired gases; detecting one or more target substances with said first and second sensors; and determining concentration of said target substances; wherein the first and second sensors are different sensors.
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34. A method of monitoring a patient during administration of anesthesia wherein said patient is connected to a breathing circuit, comprising:
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exposing at least one sensor to inspired and expired gases; and detecting one or more target substances with said sensor, wherein at least one anesthetic agent is delivered intravenously and wherein said target substance is an anesthetic agent.
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35. A method of monitoring a patient during administration of anesthesia wherein said patient is connected to a breathing circuit, comprising:
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exposing at least one sensor to inspired and expired gases; and detecting one or more target substances with said sensor, wherein at least one anesthetic agent is delivered intravenously and wherein said target substance is a physiologic gas.
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36. A method of monitoring a patient during administration of anesthesia wherein said patient is connected to a breathing circuit, comprising:
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exposing at least one sensor to inspired and expired gases; and detecting one or more target substances with said sensor, wherein at least one anesthetic agent is delivered intravenously and wherein said target substance is a gas supplied to a breathing circuit.
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Specification