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Method and device for determining the recirculation in a fistula or the cardiopulmonary recirculation, and a blood treatment device comprising a device for determining the fistula recirculation or the cardiopulmonary recirculation part

A technology for extracorporeal blood treatment and recirculation, which is used in blood circulation treatment, drug devices, other medical devices, etc.

Active Publication Date: 2010-12-15
FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The downside is that this known method requires reversal of blood flow

Method used

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  • Method and device for determining the recirculation in a fistula or the cardiopulmonary recirculation, and a blood treatment device comprising a device for determining the fistula recirculation or the cardiopulmonary recirculation part
  • Method and device for determining the recirculation in a fistula or the cardiopulmonary recirculation, and a blood treatment device comprising a device for determining the fistula recirculation or the cardiopulmonary recirculation part
  • Method and device for determining the recirculation in a fistula or the cardiopulmonary recirculation, and a blood treatment device comprising a device for determining the fistula recirculation or the cardiopulmonary recirculation part

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Embodiment Construction

[0033] In this embodiment, the arrangement for determining the fistula recirculation and / or cardiopulmonary recirculation ratio is part of the extracorporeal blood treatment apparatus, said arrangement for determining the recirculation ratio utilizes some components of the dialysis apparatus.

[0034] The internal circuit includes the right ventricle 1 of the heart, the lungs 2, the left ventricle 3 and all the capillary system 4 of the internal organs, muscle tissue and skin etc. An arteriovenous fistula 5 is made for access to the blood vessel.

[0035] The dialysis device has a dialyzer 6 which is divided by a semipermeable membrane 7 into a blood chamber 8 and a dialysate chamber 9 . An arterial blood line 10 extends from the arterial portion of the fistula 5 through an arterial connection (not shown) to the inlet of the blood chamber 8, and a venous blood line 11 extends from the outlet of the blood chamber 8 of the dialyzer 6 through a venous patient connection (not show...

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Abstract

The invention relates to a method for determining the recirculation in a fistula and / or the cardiopulmonary recirculation part during an extracorporeal blood treatment, according to which the blood to be treated flows in an extracorporeal blood circuit (I) through a blood chamber (8) of a dialyser (6) split by a semi-permeable membrane (7) into the blood chamber and a dialysis liquid chamber (9), and dialysis liquid flows in a dialysis liquid path (II) through the dialysis liquid chamber of the dialyser. The invention also relates to a device for determining the recirculation in a fistula and / or the cardiopulmonary recirculation part, and to a blood treatment device comprising a device for determining the fistula recirculation and / or the cardiopulmonary recirculation part. The method and device according to the invention are based on the fact that the sum of the fistula recirculation (RA) and the cardiopulmonary recirculation part (RCP), i.e. the total recirculation (R), is determined for two blood flow rates which differ from each other. The fistula recirculation and / or the cardiopulmonary recirculation part are then determined from the recirculation for the two blood flow rates. The first recirculation measurement is carried out for a high blood flow (QBH) for which a fistula recirculation can occur, while the second measurement is carried out for a low blood flow (QBL) for which a fistula recirculation does not occur. These two measuring values form the basis of the determination of the fistula recirculation and / or the cardiopulmonary recirculation part.

Description

technical field [0001] The invention relates to a method for determining the recirculation and / or cardiopulmonary recirculation ratio in a fistula during extracorporeal blood treatment, wherein a dialyzer is divided by a semipermeable membrane into a blood chamber and a dialysate chamber through which the blood to be treated passes The blood chamber of the dialyzer flows in the extracorporeal blood circuit, and the dialysate flows through the dialysate chamber of the dialyzer on the dialysate path. The invention also relates to an arrangement for determining the recirculation and / or cardiopulmonary recirculation ratio in a fistula, and a blood treatment device with an arrangement for determining said fistula recirculation and / or cardiopulmonary recirculation ratio. Background technique [0002] During procedures used in chronic blood purification treatments such as hemodialysis, hemofiltration and hemodiafiltration, blood is conveyed through an extracorporeal blood circuit. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M1/16A61M1/36
CPCA61M1/3658A61M2001/1617A61M2001/3658A61M1/1617A61M2205/13A61M1/16A61M1/3623
Inventor W·张E·许尔特C·巴尔多兹
Owner FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH
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