UW attempts to normalize blood clotting, collect data, and profit
The Power to Detect Blood Clot Risk, Right on Your Phone
New blood monitoring app developed by University of Washington researchers might save future patients time and money. Why is this app needed? Whether trying to prevent blood clots (which lead to heart attacks) or extended bleeding after an injury, people who live with certain conditions or take certain blood thinning medications need to monitor their blood closely.
In order to know that it is in the “healthy” range, individuals taking warfarin, a blood thinner, test their blood for two numbers — prothrombin time (PT) and international normalized ratio (INR). Currently, that testing occurs in a clinic laboratory or by using an expensive at-home testing system.
“Most people are only in what we call the ‘desirable range’ of PT/INR levels about 64% of the time,” says Dr. Kelly Michaelsen, assistant professor of anesthesiology and pain medicine in the UW School of Medicine. “How can we make this better?”
Michaelsen and researchers at the UW Paul G. Allen School of Computer Science & Engineering and UW School of Medicine are trying to create an inexpensive way for patients to check these levels at home.
How the app works
The blood-clotting test they developed uses a drop of blood, a smartphone vibration motor, a camera and an attachment holding a tiny cup. After the patient adds a drop of blood to the cup (which contains a chemical that starts the blood-clotting process), the phone’s vibration motor shakes it while the camera monitors the movement of the particle, collecting time stamps to calculate PT and INR.
“Almost every smartphone from the past decade has a vibration motor and a camera. This means that almost everyone who has a phone can use this,” says Shyam Gollakota, senior author and UW professor in the Allen School.
The bottom line
Though the app is still in a proof-of-concept stage, it could be a game changer for patients needing to easily (and inexpensively) monitor their blood.
https://www.washington.edu/news/2022/02/11/smartphone-app-vibrate-single-drop-of-blood-determine-how-well-clots/