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Recirculation during veno-venous extra-corporeal membrane oxygenation: a simulation study
KTH, School of Technology and Health (STH), Medical Engineering, Medical Imaging.ORCID iD: 0000-0002-8987-9909
(ECMO Department, Karolinska University Hospital, Stockholm)
(ECMO Department, Karolinska University Hospital, Stockholm)
KTH, School of Technology and Health (STH), Medical Engineering, Medical Imaging.
2015 (English)In: International Journal of Artificial Organs, ISSN 0391-3988, E-ISSN 1724-6040, Vol. 38, no 1, 23-30 p.Article in journal (Refereed) Published
Abstract [en]

PURPOSE:

Veno-venous ECMO is indicated in reversible life-threatening respiratory failure without life-threatening circulatory failure. Recirculation of oxygenated blood in the ECMO circuit decreases efficiency of patient oxygen delivery but is difficult to measure. We seek to identify and quantify some of the factors responsible for recirculation in a simulation model and compare with clinical data.

METHODS:

A closed-loop real-time simulation model of the cardiovascular system has been developed. ECMO is simulated with a fixed flow pump 0 to 5 l/min with various cannulation sites - 1) right atrium to inferior vena cava, 2) inferior vena cava to right atrium, and 3) superior+inferior vena cava to right atrium. Simulations are compared to data from a retrospective cohort of 11 consecutive adult veno-venous ECMO patients in our department.

RESULTS:

Recirculation increases with increasing ECMO-flow, decreases with increasing cardiac output, and is highly dependent on choice of cannulation sites. A more peripheral drainage site decreases recirculation substantially.

CONCLUSIONS:

Simulations suggest that recirculation is a significant clinical problem in veno-venous ECMO in agreement with clinical data. Due to the difficulties in measuring recirculation and interpretation of the venous oxygen saturation in the ECMO drainage blood, flow settings and cannula positioning should rather be optimized with help of arterial oxygenation parameters. Simulation may be useful in quantification and understanding of recirculation in VV-ECMO.

Place, publisher, year, edition, pages
2015. Vol. 38, no 1, 23-30 p.
National Category
Medical Image Processing Other Medical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-159647DOI: 10.5301/ijao.5000373ISI: 000351285800005PubMedID: 25588762Scopus ID: 2-s2.0-84928177837OAI: oai:DiVA.org:kth-159647DiVA: diva2:786628
Funder
Swedish Research Council, 2012-2800
Note

QC 20150213

Available from: 2015-02-06 Created: 2015-02-06 Last updated: 2017-12-05Bibliographically approved

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Broomé, Michael

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