The figure shows a box plot of the relationship between total blood volume and whether or not the person has COVID-19. There is a greater range of values at which the total blood volume could land in those with COVID-19. These values exceed those without COVID-19.

Michigan State University

- Opacities are found on the CT scans of COVID-19 patients; these opacities could be mixed with the appearance of blood, thus increasing the volume of pulmonary blood.
- The slight difference between the two groups in the figure could also indicate blood being redistributed by from small to large vessels
- In arterial pressure in the lungs could be due to tissue damage or blockage caused by microthrombi
- Hypoxia is observed in those with COVID-19, which is associated with vasoconstriction
- Figure below: pulmonary blood vessels' cross-sectional area in those with and without COVID-19 (according to the key, there is very little red in the lungs of COVID-19 patients)

Blood Vessels and COVID-19

Lins, M., Vandevenne, J., Thillai, M., Lavon, B. R., Lanclus, M., Bonte, S., ... & De Backer, W. (2020). Assessment of small pulmonary blood vessels in COVID-19 patients using HRCT. Academic Radiology.

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