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Device and method for monitoring a fluid flow rate in a cardiovascular system

A fluid flow rate and cardiovascular technology, applied in the field of fluid flow rate devices, can solve problems such as unsuitable measurement and monitoring

Inactive Publication Date: 2012-10-17
GAMBRO LUNDIA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, known methods for determining flow-related parameters during dialysis or blood treatment require separate, dedicated instruments and sensors, and are not suitable for repeated or continuous beat-to-beat measurement and monitoring

Method used

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  • Device and method for monitoring a fluid flow rate in a cardiovascular system
  • Device and method for monitoring a fluid flow rate in a cardiovascular system
  • Device and method for monitoring a fluid flow rate in a cardiovascular system

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specific Embodiment approach

[0284] In the following, exemplary embodiments of the present invention will be described with reference to a typical fluid containment system. Hereafter, embodiments and implementations of the present invention will be further exemplified in the context of an extracorporeal blood treatment system.

[0285] Throughout the following description, like elements are assigned the same reference signs.

[0286] overview

[0287] Figure A1 shows a fluid containment system in which a fluid connection C is established between a first fluid containment subsystem S1 and a second fluid containment subsystem S2. Fluid connection C may or may not transfer fluid from one subsystem to another. The first pulse generator 3 is arranged to generate a sequence of pressure waves in the fluid inside the first subsystem S1 and the second pulse generator 3' is arranged to generate a sequence of pressure waves in the fluid inside the second subsystem S2. The pressure sensor 4a is arranged to measure...

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Abstract

A device in an apparatus (200) for extracorporeal blood treatment is configured to monitor a fluid flow rate (Q) of a cardiovascular system of a subject. The apparatus comprises an extracorporeal blood circuit (20) and a connection (C) for connecting the extracorporeal blood circuit (20) to the cardiovascular system. The device comprises an input (28) for obtaining a time-dependent measurement signal (d(n)) from a pressure sensor (4a-4c) in the extracorporeal blood circuit (20). The pressure sensor (4a-4c) is arranged to detect a subject pulse originating from a subject pulse generator (30) in the cardiovascular system of the subject, wherein the system further comprises a signal processor (29) connected to the input (28). The signal processor is configured to process the measurement signal to obtain a pulse profile (e(n)) which is a temporal signal profile of the subject pulse, and to calculate a fluid flow rate (Q) based at least partly on the temporal signal profile.

Description

technical field [0001] The present invention relates to devices and methods for monitoring fluid flow rates in the cardiovascular system of a subject. More specifically, the invention relates to the calculation of flow velocity in the cardiovascular system based on the temporal signal profile of pulses originating from a pulse generator of a subject. Background technique [0002] In extracorporeal blood treatment, blood is withdrawn from a subject through an extracorporeal blood flow circuit, processed and then reintroduced into the subject. Typically, blood is circulated through the circuit using one or more pump devices. The circuit is connected to the patient's vascular access via one or more access devices, such as needles, inserted into the vascular access. Such extracorporeal blood treatments include hemodialysis, hemodiafiltration, hemofiltration, plasma exchange, blood storage, separation of blood components (eg, cells) from donor blood, and the like. [0003] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M1/36
CPCA61M2230/42A61B5/026A61M2001/3656A61M1/3639A61M1/3653A61M2230/04A61M1/3656A61M1/3655A61M1/3658A61M1/3659A61M1/3661
Inventor 布·奥尔德克里斯蒂安·索勒姆
Owner GAMBRO LUNDIA AB