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Capillary Refill Time Study for Raynaud’s Syndrome Patients

Capillary Refill Time Study for Raynaud’s Syndrome Patients

We are a research team in the Allen School of Computer Science & Engineering at the University of Washington. We are conducting a user study on collecting capillary refill time using a smartphone app for participants with Raynaud’s syndrome.

Capillary refill time is widely used to test abnormal health conditions such as dehydration and shock. In this study, we are interested in investigating the relationship between prolonged capillary refill time and early signs of Raynaud’s symptom.

We will measure the capillary refill time at normal room temperature and moderately cool temperature by putting the hand in cold water for a short duration. We are taking all the required measures to comply with the University of Washington’s COVID-19 infection and risk control measure.

The study will take around 30 minutes at the Paul G. Allen School of Computer Science and Engineering at the University of Washington. As a token of appreciation, participants who complete the study will be given a $20 Amazon gift card.

Please fill out this form to participate in the study. (https://forms.gle/1sWBauhNKx8NHEiA7)

If you have any questions, please reach out to Chunjong Park (cjparkuw@cs.washington.edu).

Participant Eligibility

In order to participate, we ask that you meet the following criteria:
– 18 years or older
– Currently has Raynaud’s syndrome


Chunjong Park
(206) 637-7632

Additional Study Details

Full Study Title
Capillary Refill Time and Raynaud’s Syndrome

Study ID: STUDY00012941
Start Date: 03/22/2022
End Date: 04/30/2022

Shwetak Patel

Accepts Healthy Volunteers?

Study Site(s)

University of Washington

185 E Stevens Way NE CSE 615
Seattle, Washington 98195


Use the link below to send a message to the study coordinator, or call the number above to speak directly with a study representative.

I am interested in this research study.