Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and device for monitoring an extracorporeal blood circuit

A technology of extracorporeal blood circuit and extracorporeal circuit, which is applied in the direction of blood circulation processing, suction equipment, etc., and can solve problems such as undetectable error states

Active Publication Date: 2009-07-22
FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, based on only a single measurement of arterial and venous pressure at a certain time, possible error conditions cannot be detected using known algorithms

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 and device for monitoring an extracorporeal blood circuit
  • Method and device for monitoring an extracorporeal blood circuit
  • Method and device for monitoring an extracorporeal blood circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The arterial and venous pressures measured in the arterial and venous branches of the extracorporeal blood circuit include in each case the dynamic pressure in the extracorporeal circuit and the dynamic pressure in the patient's vascular access generated by the flow of the blood pump .

[0035] The dynamic pressure in the extracorporeal circuit is a function of the extracorporeal blood flow and the sum of the resistance to flow in the extracorporeal circuit. The arterial flow resistance and the venous flow resistance are different because of the different geometries of the parts through which the blood flows, so the sum of the arterial and venous pressures (hereinafter, referred to as Ps) is likewise a function of the blood flow. In known blood purification methods, the delivery rate Q of the blood pump B Usually set to a fixed value. Therefore, when the viscosity of the blood is constant, the sum of the flow resistances in the extracorporeal circuit is also constant....

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

To monitor an extracorporeal blood circuit during an extracorporeal blood treatment, the arterial pressure and venous pressure in the arterial branch and venous branch of the extracorporeal circuit are measured by means of pressure sensors (18, 19), and the sum Ps and the difference deltaP of the arterial pressure and / or venous pressure measured at the same time are formed. A possible error state is indicated when the sum Ps and / or difference deltaP lie outside predetermined limit value windows A and B. To reduce the susceptibility to error, a check is preferably also made to ascertain whether the two above conditions are satisfied for n successive measurements.

Description

technical field [0001] The invention relates to a method for monitoring an extracorporeal blood circuit during extracorporeal blood treatment, in particular during chronic blood purification therapy, for example during hemodialysis, hemofiltration (haemofiltration) or hemodiafiltration (haemodiafiltration), and has Devices for monitoring extracorporeal blood circuits and for extracorporeal blood treatment, in particular hemodialysis, hemofiltration or hemodiafiltration. Background technique [0002] In known methods of chronic blood purification therapy such as hemodialysis, hemofiltration or hemodiafiltration, the patient's blood is passed through an extracorporeal blood circuit, usually equipped with a safety system that permanently monitors the arterial pressure and venous pressure within the circuit. pressure. The purpose of monitoring the pressure is to detect various complications that may arise during extracorporeal blood treatment. Possible management complications...

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
Patent Type & Authority Applications(China)
IPC IPC(8): A61M1/36
CPCA61M1/3653A61M1/3639A61M1/3656A61M1/3661
Inventor W·克莱内考夫特
Owner FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com