Dynamic oxygenator blood volume during prolonged extracorporeal life support

Rik H J Hendrix*, Eva R Kurniawati, Sanne F C Schins, Jos G Maessen, Patrick W Weerwind

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Current methods for identification of oxygenator clotting during prolonged extracorporeal life support include visual inspection, evaluation of oxygenator resistance and oxygen exchange performance, and assessment of clotting-related laboratory parameters. However, these observations do not provide a quantitative assessment of oxygenator clot formation. By measuring changes in the dynamic oxygenator blood volume this study aimed to evaluate the relation to oxygenator resistance and oxygen transfer performance. Sixty-seven oxygenators were studied during adult extracorporeal life support. Oxygenator blood volume, oxygenator resistance, and oxygen transfer efficiency were monitored. Oxygenator blood volume decreased with increasing runtime (r = -0.462; p <0.001). There was a statistically significant, fair negative correlation between oxygenator blood volume and oxygenator resistance (r = -0.476; p<0.001) in all oxygenators, which became stronger analyzing only exchanged oxygenators (r = -0.680; p<0.001) and oxygenators with an oxygenator blood volume <187 mL (r = 0.831; p<0.001). No relevant correlation between oxygenator blood volume and O2 transfer was found. Oxygenator blood volume declined over time and was clearly associated with an increasing oxygenator resistance during prolonged extracorporeal life support, though O2 transfer was less affected.

Original languageEnglish
Article numbere0263360
Number of pages9
JournalPLOS ONE
Volume17
Issue number2
DOIs
Publication statusPublished - 2 Feb 2022

Keywords

  • Adult
  • Blood Volume
  • Carbon Dioxide/blood
  • Extracorporeal Membrane Oxygenation/methods
  • Female
  • Humans
  • Male
  • Middle Aged
  • Monitoring, Physiologic/methods
  • Oxygen/blood
  • Oxygenators/statistics & numerical data
  • Regional Blood Flow
  • HEMOLYSIS
  • INSENSIBLE WATER-LOSS
  • DEPOSITS

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