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Could Blood Thickness Be a New Vital Sign? — A gloved hand holding a tube of blood

Could Blood Thickness Be a New Vital Sign?CEFR B1

25 Nov 2025

Adapted from Eric Stann-Missouri, Futurity CC BY 4.0

Photo by Malcolm Choong 鍾声耀, Unsplash

AI-assisted adaptation of the original article, simplified for language learners.

Researchers at the University of Missouri have developed a groundbreaking device to measure blood viscosity, or blood thickness, which they believe may serve as a vital sign. Traditional vital signs include heart rate and blood pressure, but they argue that viscosity plays a crucial role in health, especially linked with major health issues like heart disease and stroke.

The new device utilizes ultrasound waves to monitor blood viscosity without the need for blood samples. This is significant, as conventional methods can alter blood properties. The system works by sending sound waves through the blood and measuring its response, enabling real-time monitoring.

Doctors believe that continuous monitoring of blood viscosity could revolutionize treatments, particularly for conditions like sickle cell anemia, where blood viscosity affects health. The goal is to incorporate this technology into standard medical practices, providing deeper insights into blood flow and disease progression.

This innovative device could also lead to affordable, portable health technologies using simple, inexpensive components.

Difficult words

  • viscosityA measure of how thick a liquid is.
    blood viscosity
  • monitorTo check or observe something regularly.
    monitoring
  • technologyThe use of scientific knowledge for practical purposes.
    technologies
  • revolutionizeTo change something very significantly.
  • propertiesCharacteristics or qualities of something.
  • componentA part of a larger system.
    components
  • significantImportant or meaningful in some way.

Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.

Discussion questions

  • How could this technology change medical practices?
  • What are other applications for measuring blood viscosity?
  • Why might doctors want to monitor blood viscosity continuously?

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