Method for determining cardiac stroke volume

A stroke volume and pulse technology, applied in the field of devices for determining stroke volume, can solve problems such as poor correlation, complex biological settings, and unsatisfactory coincidence rates.

Pending Publication Date: 2020-12-04
PHILIPS MEDIZIN SYST BOBLINGEN GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, any conventional uncalibrated biological setting of PCSV and pulse contour cardiac output (PCCO) is complicated by the fact that converting BSA from having a normal fat-free mass / fat mass ratio (FFM / AM ratio ) extrapolation of mean body size to very large obese body BSA does not take into account the greatly reduced FFM / AM ratio in obese individuals with much lower AM perfusion
[0011] Furthermore, known PCSV methods exhibited moderate to poor sensitivity in detecting changes in SV compared to the gold standard reference method, resulting in poor correlation, clinically unacceptably large limits of agreement, high percentage errors and Unsatisfactory compliance rate

Method used

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  • Method for determining cardiac stroke volume
  • Method for determining cardiac stroke volume
  • Method for determining cardiac stroke volume

Examples

Experimental program
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Embodiment Construction

[0083] figure 1 A rough overview is provided for the method of the present invention according to a first embodiment. In a first embodiment, the biological calibration of the perfusion parameter BioCal based on any uncalibrated pulse contour stroke volume PCSV_uncal is performed by taking into account the separation of blood flow into fat-free mass FFM and fat mass AM.

[0084] according to figure 1 In the flow chart shown, in step S100 , an uncalibrated pulse contour stroke volume PCSV_uncal (which is also referred to as the first PCSV) is provided. In the next step S200, the perfusion parameter BioCal is determined. This will be described in further detail below. After the perfusion parameter BioCal is determined, it is applied to the first PCSV_uncal in step S280 to provide the second PCSV_imp in step S290.

[0085] Figure 1a An exemplary flowchart for providing a first PCSV_uncal is provided. In step S70, one or more characteristics of the arterial blood pressure wa...

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Abstract

A method and apparatus is provided for determining a stroke volume (SV) of an individual, comprising the steps of: providing a first pulse contour stroke volume based on one or more characteristics ofa measured arterial blood pressure waveform or providing a conventionally derived pulse contour stroke volume, determining at least one perfusion parameter descriptive for the perfusion through the fat free mass and the adipose mass of a body of the individual, and/or determining at least one fluid responsiveness parameter function depending on a fluid responsiveness parameter descriptive for a heart-lung interaction of the individual, and adjusting the first pulse contour stroke volume or the conventionally derived pulse contour stroke volume based on at the least one of the perfusion parameter and/or the fluid responsiveness parameter function to provide a second pulse contour stroke volume.

Description

technical field [0001] The invention relates to a method for determining stroke volume. Furthermore, the invention relates to a device for determining a stroke volume and a computer-readable medium for carrying out the method. In particular, the present invention relates to methods, devices and computer readable media for determining stroke volume based on invasive or non-invasive arterial pulse contour analysis, ie so-called pulse contour stroke volume PCSV. Background technique [0002] Cardiac output, which is defined as the volume of blood pumped by the heart over time, is an important parameter for the diagnosis and management of patients, especially during surgical procedures in the intensive care unit or emergency room. Cardiac output is usually measured in liters per minute. Cardiac output CO depends on the volume of blood the heart pumps with each beat or heartbeat (which is called stroke volume) and the number of heartbeats in a given time (which is called heart ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/021A61B5/029
CPCA61B5/02125A61B5/029A61B5/02028A61B5/02108A61B5/0816
Inventor U·法伊弗S·雷格B·施托尔策
Owner PHILIPS MEDIZIN SYST BOBLINGEN GMBH
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