发明授权
US06241681B1 Methods of measuring cardiac output using a non-invasively estimated intrapulmonary shunt fraction
有权
使用非侵入性估计的肺内分流部分测量心输出量的方法
- 专利标题： Methods of measuring cardiac output using a non-invasively estimated intrapulmonary shunt fraction
- 专利标题（中）： 使用非侵入性估计的肺内分流部分测量心输出量的方法
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申请号： US09464589申请日： 1999-12-16
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公开(公告)号： US06241681B1公开(公告)日： 2001-06-05
- 发明人: Dinesh G. Haryadi , Joseph A. Orr , Kai Kück , Michael B. Jaffe
- 申请人： Dinesh G. Haryadi , Joseph A. Orr , Kai Kück , Michael B. Jaffe
- 主分类号： A61B502
- IPC分类号： A61B502
摘要：
A method of non-invasively estimating the intrapulmonary shunt in a patient. The method includes non-invasively measuring respiratory flow, respiratory carbon dioxide content, and arterial blood oxygen content. A re-breathing process is employed to facilitate an estimate of the patient's pulmonary capillary blood flow. Any inaccuracies of the arterial blood oxygen content are corrected to provide a substantially accurate arterial blood oxygen content measurement. The respiratory flow, carbon dioxide content and arterial blood oxygen content measurements, and the pulmonary capillary blood flow estimate are employed to estimate an intrapulmonary shunt of the patient. The invention also includes a method of determining the total cardiac output of the patient which considers the estimated intrapulmonary shunt.