Retraction of: Scientific Reports https://doi.org/10.1038/s41598-021-94450-8, published online 29 July 2021
The Editors have retracted this Article.
Following publication, concerns were raised about the rationale for the approach presented, the assumptions and approximations used and the validity of its application to cardiology. A post-publication review of the Authors' mathematical arguments revealed a lack of clarity in the terms presented and inferences that are not adequately justified. The main concerns are that the model is based on circular reasoning which makes it non-predictive, that it assumes that blood behaves as an ideal gas, and hypothesizes that quasi-sonic flow velocities exist in the cardiovascular system while all experimental evidence shows that cardiovascular flow velocities are orders of magnitude lower than the speed of sound and do not involve any compressibility effects. The Editors therefore no longer have confidence in the conclusions presented.
None of the Authors has responded to correspondence from the Editors about this retraction.
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Sanal Kumar, V.R., Sankar, V., Chandrasekaran, N. et al. Retraction Note: Discovery of nanoscale sanal flow choking in cardiovascular system: exact prediction of the 3D boundary-layer-blockage factor in nanotubes. Sci Rep 13, 9176 (2023). https://doi.org/10.1038/s41598-023-36260-8
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DOI: https://doi.org/10.1038/s41598-023-36260-8
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Sanal flow choking in cardiovascular systems: A scientific fallacy
Indian Journal of Thoracic and Cardiovascular Surgery (2024)
Ganesh Natarajan
This retraction reaffirms that the fundamental basis of Sanal flow choking, and in particular its application in the biological realm, are completely flawed. The works based on this concept and specifically its application in cardiovascular systems should be seen with great caution . The review article by the same research group in Physics of Fluids, https://doi.org/10.1063/5.0..., which cites this retracted Sci. Rep. article suffers from the very same flaws that has led to this retraction. Unfortunately, the salient conclusions in the Phys. Fluids review work are also speculative and misleading, and are consequently bereft of any scientific value.