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1. 发明专利

JP2000333910A CARDIAC FUNCTION MONITORING DEVICE 失效
公开(公告)号：JP2000333910A
公开(公告)日：2000-12-05
申请号：JP14550299
申请日：1999-05-25
申请人： NIPPON COLIN CO LTD
发明人： HAYASHI KAZUKO
IPC分类号： A61B5/0205 , A61B5/022 , A61B5/0245 , A61B5/029
摘要： PROBLEM TO BE SOLVED: To provide a cardiac function monitoring device capable of easily and continuously monitoring a heat mechanical efficiency in a noninvasive fashion. SOLUTION: A heart mechanical efficiency calculating means 88 calculates a heart mechanical efficiency Ees/Ea, i.e., the ratio of left ventricle post-systolic elastance Ees to aortic effective elastance Ea, oh the basis of bloodlessly determined pre-ejection period PEP, ejection period ET, post-diastolic aortic pressure Pad, and post-systolic aortic pressure Ped by use of the relationship represented by present formulas: Ees/Ea=(Pad/Pes[1+K(ET/PEP)]-1 K=a(Ees/Ea)b+C(ET/ PEP)+d wherein (a), (b), (c), (d) each represent constants. Therefore, the heart mechanical efficiency Ees/Ea corresponding to cardiac functions can be easily and continuously monitored in a noninvasive fashion.

2. 发明专利

JPH11113860A CARDIAC FUNCTION MONITORING DEVICE 失效
公开(公告)号：JPH11113860A
公开(公告)日：1999-04-27
申请号：JP27633897
申请日：1997-10-09
申请人： NIPPON COLIN CO LTD
发明人： TANAKA YOSHIBUMI , SHIGEMI KENJI , HAYASHI KAZUKO
IPC分类号： A61B5/0205 , A61B5/0402
摘要： PROBLEM TO BE SOLVED: To provide a cardiac function monitoring device which non-invasively and easily monitor a cardiac machine efficiency or a left ventricular endo- systolic elastance. SOLUTION: When a pressure-volume loop drawn per pulse approximates to a rectangle composed of a systolic constant pressure line and a diastolic constant pressure line which are two sides parallel to a volume axis, and a systolic constant volume line and a diastolic constant volume line which are two sides parallel to a pressure axis, a cardiac machine efficiency Ea /Ees is calculated by the cardiac machine efficiency calculation means 88 based on the pre-ejection period PEP found by a pre-ejection period calculation means 84 at every pulse and the ejection period LVET found by an ejection period calculation means 86 at every pulse according to the preset relation shown by a numerical formula 1 based on the fact that the ratio of the aortic effective elastance Ea and the left ventricular ends systolic elastance Ees , namely the cardiac machine efficiency Ea /Ees approximates to the ratio PEP/LV of the pre-ejection time PEP to the ejection period LVET of the heart. This device can thus easily and non-invasively monitor the cardiac function.

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