Abstract: A method of setting expiratory time in controlled mechanical ventilation sets a subject's expiratory time based on when the subject's tidal volume expires. Another method determines when the subject's tidal volume expires and sets the subject's expiratory time based on the determination. A device for use in controlled mechanical ventilation comprises a flow rate sensor configured to determine when a subject's tidal volume expires and bases the subject's expiratory time on the determination.

Abstract: A method of setting inspiratory time in controlled mechanical ventilation varies a subject's inspiratory times; determines at least one or more of end tidal gas concentrations or gas volumes exhaled by the subject per breath or both associated with the inspiratory times; establishes a stable condition of at least one or more of the gas concentrations or the gas volumes or both; and determines an optimal inspiratory time based on a deviation from the stable condition. Similarly, a device for use in controlled mechanical ventilation comprises means for varying a subject's inspiratory times; means for determining at least one or more of end tidal gas concentrations or gas volumes exhaled by the subject per breath or both associated with the inspiratory times; means for establishing a stable condition of at least one or more of the gas concentrations or the gas volumes or both; and means for determining an optimal inspiratory time based on a deviation from the stable condition.

Abstract: A method sets a subject's expiratory time based on the subject's natural exhalation time, when the subject's natural exhalation flow ceases, and/or when the subject's tidal volume is expired. Another determines the subject's natural exhalation time, when the subject's natural exhalation flow ceases, and/or when the subject's tidal volume is expired, and sets the subject's expiratory time based on the determination. In addition, a flow rate sensor determines the subject's natural exhalation time, when the subject's natural exhalation flow ceases, and/or when the subject's tidal volume is expired, and bases the subject's expiratory time on the determination.

Abstract: A method of setting a subject's breath size in controlled mechanical ventilation, comprising varying a subject's tidal volumes and/or inspiratory pressures for a predetermined inspiratory time and predetermined expiratory time; determining end tidal gas concentrations associated with said tidal volumes and/or inspiratory pressures; and curve-fitting a relationship between said tidal volumes and/or inspiratory pressures and said end tidal gas concentrations.

Abstract: A method of setting expiratory time in controlled mechanical ventilation sets a subject's expiratory time based on the subject's natural exhalation time. Another method determines the subject's natural exhalation time and sets the subject's expiratory time based on the determination. A device for use in controlled mechanical ventilation comprises a flow rate sensor configured to determine a subject's natural exhalation time and base the subject's expiratory time on the determination.

Abstract: A method of setting inspiratory time in controlled mechanical ventilation varies a subject's inspiratory times; determines end tidal gas concentrations associated with the inspiratory times; establishes a stable condition of the gas concentrations; and determines an optimal inspiratory time based on a deviation from the stable condition. Similarly, a device for use in controlled mechanical ventilation comprises means for varying a subject's inspiratory times; means for determining end tidal gas concentrations associated with the inspiratory times; means for establishing a stable condition of the gas concentrations; and means for determining an optimal inspiratory time based on a deviation from the stable condition.

Abstract: A method of setting inspiratory time in controlled mechanical ventilation varies a subject's inspiratory times; determines gas volumes exhaled by the subject per breath associated with the inspiratory times; establishes a stable condition of the gas volumes; and determines an optimal inspiratory time based on a deviation from the stable condition. Similarly, a device for use in controlled mechanical ventilation comprises means for varying a subject's inspiratory times; means for determining gas volumes exhaled by the subject per breath associated with the inspiratory times; means for establishing a stable condition of the gas volumes; and means for determining an optimal inspiratory time based on a deviation from the stable condition.

Abstract: A method of setting expiratory time in controlled mechanical ventilation sets a subject's expiratory time based on when the subject's natural exhalation flow ceases. Another method determines when the subject's natural exhalation flow ceases and sets the subject's expiratory time based on the determination. A device for use in controlled mechanical ventilation comprises a flow rate sensor configured to determine when a subject's natural exhalation flow ceases and bases the subject's expiratory time on the determination.

Abstract: A method of setting inspiratory time, expiratory time, and a subject's breath size in controlled mechanical ventilation comprises: a) setting a subject's expiratory time; b) setting the subject's inspiratory time; and c) setting the subject's breath size, all based on various criteria.