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Method and device for determining the transmembrane pressure in an extracorporeal blood treatment

A transmembrane pressure and blood technology, which is applied in blood circulation treatment, blood filtration, drug devices, etc., to achieve the effect of high-precision calculation

Active Publication Date: 2010-12-01
FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors have found that in some processing environments constraints must be set for the determination of transmembrane pressure with high precision

Method used

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  • Method and device for determining the transmembrane pressure in an extracorporeal blood treatment
  • Method and device for determining the transmembrane pressure in an extracorporeal blood treatment
  • Method and device for determining the transmembrane pressure in an extracorporeal blood treatment

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Embodiment Construction

[0032] The device for measuring transmembrane pressure according to the invention may be part of a conventional blood treatment device or a separate device unit cooperating with a blood treatment device.

[0033]The present blood treatment apparatus is a hemodiafiltration apparatus comprising a dialyzer 1 divided by a semipermeable membrane 2 into a first chamber 3 through which blood flows and which will be referred to hereinafter as the blood chamber, and the dialysis fluid A second chamber 4 flows through it and will be referred to hereinafter as the dialysis fluid chamber. The first chamber 3 is integrated into the extracorporeal blood circuit 5A, while the second chamber 4 is integrated into the dialysis fluid system 5B of the hemodiafiltration device.

[0034] The extracorporeal blood circuit 5A comprises an arterial blood supply line 6 connected to the inlet 3 a of the chamber 3 and a venous blood return line 7 leaving the outlet 3 b of the blood chamber 3 of the dialyz...

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Abstract

The invention relates to a method for determining the transmembrane pressure during an extracorporeal blood treatment in which blood flows at a defined blood flow rate through an arterial blood conduit 6 of an extracorporeal blood circuit 5A into the inlet of a first chamber 3 of a dialyzer 1, which is divided by a semipermeable membrane 2 into the first chamber and a second chamber 4, and flows through a venous blood conduit 7 from the outlet of the first chamber 3 of the dialyzer 1, while dialysis liquid flows through a dialysis liquid supply conduit 10 into the inlet of the second chamber of the dialyzer and flows through a dialaysis liquid discharge conduit 11 from the outlet of the second chamber of the dialyzer. The method according to the invention and the device according to the invention for determining the transmembrane pressure are such that the pressure on the blood side and on the dialysis liquid side of the dialyzer is measured with relatively little technical outlay, specifically with fewer than four pressure sensors 20, 21, 22, and a preliminary uncorrected value is calculated for the transmembrane pressure and is thereafter corrected by a correction variable that is dependent on a variable correlating with the viscosity of the blood.

Description

technical field [0001] The invention relates to a method for determining the transmembrane pressure during extracorporeal blood treatment, wherein blood flows at a specific blood flow rate through an arterial blood supply line of an extracorporeal blood circuit into a compartment divided into a first chamber and a second chamber by a semipermeable membrane The inlet of the first chamber of the dialyzer and flows out of the first chamber outlet of the dialyzer through the venous blood return line, while the dialysis fluid flows through the dialysis fluid supply line into the inlet of the second chamber of the dialyzer and exits the dialysed fluid discharge line The flow exits the outlet of the second chamber of the dialyzer and separates the fluid from the blood through the diaphragm of the dialyzer at a specific flow rate. Furthermore, the invention relates to an extracorporeal blood treatment in which the transmembrane pressure is determined. Furthermore, the invention relat...

Claims

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Application Information

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IPC IPC(8): A61M1/16A61M1/34
CPCA61M1/34A61M2205/3331A61M1/16A61M1/3413A61M1/36A61M2205/3334A61M2205/50A61M1/1601A61M1/3403A61M1/341G16Z99/00
Inventor K·巴尔沙特A·加格尔M·库尔兹R·斯皮克曼
Owner FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH
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