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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 A2

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.

Scientists at the University of Missouri are studying blood viscosity, which is how thick or sticky blood is. They believe this could be an important new vital sign for health.

Thick blood can make the heart work harder and cause clots. The new device uses sound waves to measure blood viscosity without taking samples. This method is important because regular tests can change how blood behaves.

If successful, this technology could help manage diseases like sickle cell anemia better and provide real-time health information.

Difficult words

  • viscosityA measure of how thick a liquid is.
  • importantHaving great value or significance.
  • deviceA tool or machine made for a specific purpose.
  • measureTo find the size or amount of something.
  • diseaseAn illness affecting the body.
    diseases
  • manageTo control or handle something.
  • informationFacts or details about something.

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

Discussion questions

  • How do you think thick blood affects a person's health?
  • What are other important vital signs you know?
  • Why is technology important in health care?

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