Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for measuring cardiac output by ultrasound

A cardiac output and ultrasound technology, applied in the field of cardiac output measurement, can solve the problems of dependence on operators, distortion of left ventricular outlet measurement results, echocardiography technology cannot be automated, etc., to achieve low invasiveness, easy automation and reproduction Effect

Inactive Publication Date: 2019-03-01
亚眠皮卡第大学中心医院 +2
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This echocardiographic technique cannot be automated and is operator dependent
In addition, some disorders, such as abnormalities of the arterial valve or obstruction of the left ventricular outlet, can distort measurements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for measuring cardiac output by ultrasound
  • Method for measuring cardiac output by ultrasound
  • Method for measuring cardiac output by ultrasound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0089] figure 2 Various steps for implementing the method according to the invention for measuring the cardiac output of the heart are shown.

[0090] During a first step 11 the patient is prepared for an echocardiogram in order to measure their cardiac output as well as other parameters.

[0091] In one example of an embodiment of the invention, a transesophageal echocardiographic probe is used to obtain images of the right atrium RA, as image 3 shown.

[0092] Prepare in advance one or more serum syringes (eg, 5) containing 4 milliliters (ml) of saline serum and 0.5 milliliter (ml) of air. Although serum / air mixtures are broadly preferred, the invention is not limited to a particular type of contrast agent.

[0093] Contrast agents can be obtained by using as Figure 4 The device shown results in a device comprising two syringes 2 and 3 which are connected via a three-way valve 4 . Push the serum contained in the first syringe 2 to the second empty syringe 3 and then in...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Method for measuring cardiac output using an ultrasound apparatus, wherein: a plurality of images of an area of the heart where a contrast agent has been injected is acquired by the ultrasound apparatus, at different times; values of the intensity of the area are extracted from the images; and the cardiac output is calculated from the value given to at least one parameter (k) of a reference function, adjusted so that said function best describes the changes in the intensity values measured.

Description

technical field [0001] The present invention relates to the measurement of cardiac output. Background technique [0002] Cardiac output is the volume of blood ejected by the heart per minute and is the product of the volume of blood ejected by the heart during each contraction or systolic ejection and the heart rate. This parameter must be closely monitored in intensive care or in hemodynamically unstable persons in shock under anesthesia. Various methods allow for the measurement of cardiac output. [0003] One of the main techniques is a method called "thermodilution". A so-called "Swan-Ganz" catheter is introduced through the large central vein and advanced into the right heart and then into the pulmonary artery. The catheter has exit holes at the right atrium and pulmonary artery. A low inertia thermistor exists in the catheter to measure small changes in blood temperature. A cold liquid agent is injected through the opening into the right atrium, cooling the blood ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A61B8/06A61B8/08A61K49/22
CPCA61B8/481A61B8/5223A61K49/0004A61K49/223A61B8/065G16H50/30A61B8/463
Inventor 米歇尔·斯拉玛朱利安·迈泽尔克里斯多夫·贝尔斯罗杰·布泽拉尔奥利维尔·巴勒迪恩特
Owner 亚眠皮卡第大学中心医院