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Effect of Heparinized Flush Concentration on Safety and Efficacy During Endovascular Thrombectomy for Acute Ischemic Stroke: Results from the MR CLEAN Registry

CardioVascular and Interventional Radiology volume 44, pages 750–755 (2021)Cite this article

Abstract

Background

Currently, there are no recommendations regarding the use of heparinized flush during endovascular thrombectomy (EVT) for acute ischemic stroke. Periprocedural heparin could, however, affect functional outcome and symptomatic intracranial hemorrhage (sICH). We surveyed protocols on heparin flush concentrations in Dutch EVT centers and assessed its effect on safety and efficacy outcomes.

Methods

Patients registered in the MR CLEAN Registry, from 2014 up to 2017 were included. We collected data on center protocols regarding heparin flush concentrations (IU/L) and grouped patients by their per protocol administered heparin flush concentration. We used a random effects model with random intercepts by EVT center and analyzed endpoints using regression models. Endpoints were sICH, mRS at 90 days, mortality and reperfusion rates.

Results

A total of 3157 patients were included of which 45% (6 centers) received no heparin in the flush fluids, 1.8% (1 center) received flush fluids containing 2000 IU/L heparin, 26% (4 centers) received 5000 IU/L, 22% (4 centers) received 10.000 IU/L and 5.6% (1 center) received 25.000 IU/L. Higher heparin concentration was associated with increased sICH (aOR 1.15; 95% CI 1.02–1.29), but not with functional outcome, mortality or reperfusion rates.

Conclusion

Effect of heparin in flush fluids should not be ignored by clinicians or researchers as higher concentrations may be associated with higher rates of ICH. The observed variation in protocols regarding heparin concentrations between EVT centers should encourage further studies, ideally in a controlled way, resulting in recommendations on heparin use in flush fluids in future guidelines.

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Funding

This study was not supported by any funding.

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Authors and Affiliations

  1. Department of Radiology, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX, Maastricht, The Netherlands

    Faysal Benali, Christiaan van der Leij & Wim H. van Zwam

  2. Department of Neurology, Maastricht University Medical Center and Cardiovascular Research Institute, Maastricht, The Netherlands

    Wouter H. Hinsenveld & Julie Staals

  3. Department of Neurology, Erasmus MC University Medical Center, Rotterdam, The Netherlands

    Bob Roozenbeek & Rob A. van de Graaf

  4. Department of Public Health, Erasmus MC University Medical Center, Rotterdam, The Netherlands

    Hester F. Lingsma

  5. Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, The Netherlands

    Bob Roozenbeek & Aad van der Lugt

  6. Department of Radiology and Nuclear Medicine, Amsterdam University Medical Centers, Location AMC, Amsterdam, The Netherlands

    Charles B. M. Majoie

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  1. Faysal Benali
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  2. Wouter H. Hinsenveld
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  3. Christiaan van der Leij
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  5. Rob A. van de Graaf
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  6. Julie Staals
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  9. Charles B. M. Majoie
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  10. Wim H. van Zwam
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MR CLEAN REGISTRY investigators

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Correspondence to Faysal Benali.

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Faysal Benali and Wouter H. Hinsenveld: shared first author.

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Benali, F., Hinsenveld, W.H., van der Leij, C. et al. Effect of Heparinized Flush Concentration on Safety and Efficacy During Endovascular Thrombectomy for Acute Ischemic Stroke: Results from the MR CLEAN Registry. Cardiovasc Intervent Radiol 44, 750–755 (2021). https://doi.org/10.1007/s00270-020-02726-9

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  • DOI: https://doi.org/10.1007/s00270-020-02726-9

Keywords

  • Ischemic stroke
  • Endovascular thrombectomy
  • Heparin
  • Heparin flush
  • Flush fluids
  • Functional outcome