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Apparatus and methods for computing cardiac output of a living subject via applanation tonometry

A technique of cardiac output and cardiac output, applied in the field of devices and methods for calculating the cardiac output of living subjects through applanation tonometry, capable of solving inaccurate cardiac output, non-existence of true and accurate measurement, Poor and other issues

Inactive Publication Date: 2018-08-31
ZHEJIANG SHANSHI BIOLOGICAL MEDICAL DEVICES (SHANGQIU) CO LTD
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Problems solved by technology

Therefore, the calculation of cardiac output using prior art linear approximation strategies is imprecise and suboptimal
Therefore, there is no widely accepted standard for a true and accurate measurement of CO

Method used

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  • Apparatus and methods for computing cardiac output of a living subject via applanation tonometry
  • Apparatus and methods for computing cardiac output of a living subject via applanation tonometry
  • Apparatus and methods for computing cardiac output of a living subject via applanation tonometry

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Embodiment Construction

[0029] Reference is now made to the drawings, in which the same reference numerals always refer to the same parts.

[0030] It should be noted that although the present disclosure mainly uses the measurement results of hemodynamic parameters obtained in an invasive or non-invasive manner (such as using applanation tonicity, passing through the radial artery of a human subject (ie, wrist Part) obtained blood pressure) is described in terms of the device and method for calculating the cardiac output of a living subject, but the present disclosure can also be easily embodied or adapted to utilize such parameters in other blood vessels and locations of the human body and Use these parameters of other warm-blooded species. Similarly, the technology of the present disclosure can be utilized relative to other parameter measurement results, and used in other similar fluid systems that have properties similar to those of biological circulatory systems. All such adaptation forms and alter...

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Abstract

Apparatus and methods for calculating cardiac output (CO) of a living subject using applanation tonometry measurements. In one embodiment, the apparatus and methods build a nonlinear mathematical model to correlate physiologic source data vectors to target CO values. The source data vectors include one or more measurable or derivable parameters such as: systolic and diastolic pressure, pulse pressure, beat-to-beat interval, mean arterial pressure, maximal slope of the pressure rise during systole, the area under systolic part of the pulse pressure wave, gender (male or female), age, height andweight. The target CO values are acquired using various methods, across a plurality of individuals. Multidimensional nonlinear optimization is then used to find a mathematical model which transformsthe source data to the target CO data. The model is then applied to an individual by acquiring physiologic data for the individual and applying the model to the collected data.

Description

[0001] Related applications [0002] This application is a divisional application of Chinese patent application CN201480014469.9. The Chinese filing date of 201480014469.9 is March 14, 2014. [0003] This application claims the priority of U.S. Patent Application Serial No. 13 / 829,061 with the same name and filed on March 14, 2013. This application is related to the co-owned and co-pending U.S. patent application serial number 13 / 827,063 filed on March 14, 2013 under the title "APPARATUS ANDMETHODS FOR COMPUTING CARDIAC OUTPUT OF A LIVING SUBJECT". Technical field [0004] The present disclosure generally relates to methods and devices for measuring the cardiac output of a living subject, and specifically, in one aspect relates to the use of substantially non-invasive techniques to accurately estimate the cardiac output of a living subject . Background technique [0005] Cardiac output (CO) refers to the volume of blood pumped through the heart (through the left or right ventricle) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/00A61B3/16A61B5/02A61B5/021A61B5/024A61B5/028A61B5/029A61B5/0452A61B8/02A61B8/12A61B8/08A61B8/06A61B8/00
CPCA61B5/028A61B8/06A61B8/065A61B8/12A61B8/4416A61B8/481A61B8/488A61B5/02108A61B5/029A61B3/165A61B5/02A61B5/021A61B5/024A61B5/7278A61B5/742A61B8/02
Inventor 奥利弗·高杰马蒂亚斯·博恩帕特里克·洪齐克奥莱克西·莫罗佐夫费利克斯·弗里德里希
Owner ZHEJIANG SHANSHI BIOLOGICAL MEDICAL DEVICES (SHANGQIU) CO LTD
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