机械通气期间心输出量或有效肺血流量的二氧化碳追踪

• Format: Patent
• Language: Chinese
• Published: 19.10.2021
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

本公开内容涉及用于连续确定机械通气对象(3)的心输出量或EPBF的二氧化碳追踪方法，其包括以下步骤：测量(S1)所述对象的呼气CO2，以及在第一时间点时确定(S2)所述对象的心输出量或EPBF的第一值。所述方法还包括以下步骤：控制(S3)所述对象的机械通气以使所述对象的静脉CO2水平在所述第一时间点与第二时间点之间保持基本上恒定，由呼气CO2测量值确定(S4)在所述第一与第二时间点之间所述对象的肺泡CO2变化，以及基于所述第一值和所述肺泡CO2变化来确定(S5)所述对象的心输出量或EPBF的第二且更新的值。 A capnotracking method for continuous determination of cardiac output or EPBF of a mechanically ventilated subject includes the steps of measuring expiratory CO2 of the subject and determining a first value of cardiac output or EPBF of the subject at a first point in time; controlling the mechanical ventilation of the subject to keep a level of venous CO2 of the subject substantially constant between the first point in time and a second point in time; determining from the expiratory CO2 measurements a change in alveolar CO2 of the subject between the first and second points in time; and determining a second and updated value of cardiac output or EPBF of the subject based on the first value and the change in alveolar CO2.