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Lucile Mercadal, Aziz Hamani, Bernard Béné, Thierry Petitclerc 

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Presentation on theme: "Lucile Mercadal, Aziz Hamani, Bernard Béné, Thierry Petitclerc "— Presentation transcript:

1 Determination of access blood flow from ionic dialysance: Theory and validation 
Lucile Mercadal, Aziz Hamani, Bernard Béné, Thierry Petitclerc  Kidney International  Volume 56, Issue 4, Pages (October 1999) DOI: /j x Copyright © 1999 International Society of Nephrology Terms and Conditions

2 Figure 1 Blood flows without access recirculation. Vascular access blood flow (QA) is usually higher than blood flow at the dialyzer inlet (QB). In these conditions, no recirculation occurs. Kidney International  , DOI: ( /j x) Copyright © 1999 International Society of Nephrology Terms and Conditions

3 Figure 2 Blood flows with access recirculation. If QA < QB, recirculation occurs with: QR = QB – QA. The rate of solute delivered to the dialyzer can be expressed as follows:(Eq. 1) Kidney International  , DOI: ( /j x) Copyright © 1999 International Society of Nephrology Terms and Conditions

4 Figure 2 Blood flows with access recirculation. If QA < QB, recirculation occurs with: QR = QB – QA. The rate of solute delivered to the dialyzer can be expressed as follows:(Eq. 1) Kidney International  , DOI: ( /j x) Copyright © 1999 International Society of Nephrology Terms and Conditions

5 Figure 3 Recirculation with blood lines in reversed position. The recirculation ratio is a function of QA. The solute conservation at point M can be expressed as follows:(Eq. 3) Kidney International  , DOI: ( /j x) Copyright © 1999 International Society of Nephrology Terms and Conditions

6 Figure 3 Recirculation with blood lines in reversed position. The recirculation ratio is a function of QA. The solute conservation at point M can be expressed as follows:(Eq. 3) Kidney International  , DOI: ( /j x) Copyright © 1999 International Society of Nephrology Terms and Conditions

7 Figure 4 Comparison of access flow rate values measured using the Diascan® (QA-ID) and the HD01® monitor (QA-US). Kidney International  , DOI: ( /j x) Copyright © 1999 International Society of Nephrology Terms and Conditions

8 Figure 5 Bland-Altman plot between access flow rate values measured by the Diascan® (QA-ID) and by HD01® monitor (QA-US). Kidney International  , DOI: ( /j x) Copyright © 1999 International Society of Nephrology Terms and Conditions

9 Figure 6 A device for reversing the blood lines. When crossed lines are clamped (as in the photograph), blood lines are in a normal position. When external lines are clamped, the blood lines are reversed. Kidney International  , DOI: ( /j x) Copyright © 1999 International Society of Nephrology Terms and Conditions


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