摘要:
Ventilation information may be presented. Output signals may be received that convey information related to one or more breathing parameters of a subject receiving assisted or controlled mechanical ventilation. Based at least in part on the received output signals, volumetric components of a tidal volume of the subject may be determined. The volumetric components may include an alveolar dead space, an effective alveolar tidal volume, and/or other volumetric components. The alveolar dead space is the volume of inspired gas that occupies alveoli but does not take part in oxygen exchange in the lungs of the subject. The effective alveolar tidal volume is the volume of inspired gas that takes part in oxygen exchange in the lungs of the subject. A visual representation that textually or graphically represents the tidal volume, and/or textually or graphically represents the volumetric components separately from each other may be presented via a user interface.
摘要:
A system is configured to monitor the dead space fraction of a subject in a substantially ongoing manner, rather than only updating the dead space fraction of the subject if one or more blood gas parameters of the subject are measured. This may facilitate enhanced control over respiratory therapy being provided to the subject, may inform decisions about care of the subject, and/or may provide other enhancements.
摘要:
Values of components of total carbon dioxide excreted by a subject can be provided. One or more signals may be received conveying information related to a rate of total carbon dioxide excreted by the subject. Based at least in part on the received one or more signals, a first capnometric component and/or a second capnometric component may be determined. The first capnometric component may indicate a rate of metabolic carbon dioxide production. The second capnometric component may indicate a rate of carbon dioxide transfer to or from body compartments of the subject that store carbon dioxide. The first capnometric component and/or the second capnometric component may be presented to a user.
摘要:
A subject interface appliance (10) configured to deliver a breathable substance to a subject. The subject interface appliance includes a primary interface (12) configured to deliver a breathable substance to the subject, and a secondary interface (14) configured to obtain gas samples from the airway of the subject. The secondary interface is resiliently held at a default position with respect to the primary interface. The default position is located such that installation of the primary and secondary interfaces on the subject results in the application of a bias force to the secondary interface that holds the secondary interface in place.
摘要:
Values of components of total carbon dioxide excreted by a subject can be provided. One or more signals may be received conveying information related to a rate of total carbon dioxide excreted by the subject. Based at least in part on the received one or more signals, a first capnometric component and/or a second capnometric component may be determined. The first capnometric component may indicate a rate of metabolic carbon dioxide production. The second capnometric component may indicate a rate of carbon dioxide transfer to or from body compartments of the subject that store carbon dioxide. The first capnometric component and/or the second capnometric component may be presented to a user.
摘要:
Ventilation information may be presented. Output signals may be received that convey information related to one or more breathing parameters of a subject receiving assisted or controlled mechanical ventilation. Based at least in part on the received output signals, volumetric components of a tidal volume of the subject may be determined. The volumetric components may include an alveolar dead space, an effective alveolar tidal volume, and/or other volumetric components. The alveolar dead space is the volume of inspired gas that occupies alveoli but does not take part in oxygen exchange in the lungs of the subject. The effective alveolar tidal volume is the volume of inspired gas that takes part in oxygen exchange in the lungs of the subject. A visual representation that textually or graphically represents the tidal volume, and/or textually or graphically represents the volumetric components separately from each other may be presented via a user interface.
摘要:
A system is configured to monitor the dead space fraction of a subject in a substantially ongoing manner, rather than only updating the dead space fraction of the subject if one or more blood gas parameters of the subject are measured. This may facilitate enhanced control over respiratory therapy being provided to the subject, may inform decisions about care of the subject, and/or may provide other enhancements.
摘要:
A subject interface appliance (10) configured to deliver a breathable substance to a subject. The subject interface appliance includes a primary interface (12) configured to deliver a breathable substance to the subject, and a secondary interface (14) configured to obtain gas samples from the airway of the subject. The secondary interface is resiliently held at a default position with respect to the primary interface. The default position is located such that installation of the primary and secondary interfaces on the subject results in the application of a bias force to the secondary interface that holds the secondary interface in place.
摘要:
A system and method that determine the functional residual capacity of a subject in an automated manner. The determination of the functional residual capacity of the subject is made by analyzing the washout and/or wash-in of one or more molecular species present in gas breathed by the subject. The determination of the functional residual capacity can be made without a determination of oxygen consumption.
摘要:
Methods for estimating the volume of the carbon dioxide stores of an individual's respiratory tract include determining a carbon dioxide store volume at which a correlation between corresponding signals of carbon dioxide elimination and an indicator of the content of carbon dioxide in blood of the individual is optimized. The estimate of the volume of carbon dioxide stores, which comprises a model of the respiratory tract, or lungs, of the individual, may be used as a transformation to improve the accuracy of one or both of the carbon dioxide elimination and carbon dioxide content signals. Transformation, or filtering, algorithms are also disclosed, as are systems in which the methods and algorithms may be used. The methods, algorithms, and systems may be used to accurately and noninvasively determine one or both of the pulmonary capillary blood flow and cardiac output of the individual.