Fingerprick test for blood thinners put to the test
NCT ID NCT04074980
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tested whether a fingerstick blood test (LumiraDx INR test) gives accurate results for people taking the blood thinner phenprocoumon. Researchers compared fingerstick results to standard lab tests in 102 adults. The goal is to see if this quick test can reliably monitor blood thinning levels.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If successful, this could provide a reliable, quick fingerstick test for monitoring blood thinner levels at home or in clinics.
- What could go wrong
- This is a small, completed accuracy study, not a treatment trial. The test may still have errors compared to lab methods, and results may not apply to other blood thinners.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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102 people
The number who actually took part.
- Started
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May 2019
- Finished
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Sep 2019
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
102 subjects (24 female and 78 male) taking Phenprocoumon. Ages ranged from 36 - 88 years.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Persons \>18 years of age * Willing and able to provide written informed consent and comply with study procedures * Currently prescribed Phenprocoumon VKA Therapy * Deemed medically appropriate for study participation by the Investigator Exclusion Criteria: * Subject has previously participated in this part of the study * Subject is within 4 weeks of first prescription of Phenprocoumon * Subject is taking a DOAC, or non-Phenprocoumon VKA therapy * Confirmed or suspected pregnancy * Vulnerable populations deemed inappropriate for study by the Investigator * Deemed medically inappropriate for study by the Investigator (i.e. patients with a known inherited \[e.g. haemophilia or von Willebrand's disease\] or acquired \[e.g. liver cirrhosis\] condition likely to be associated with a coagulopathy; or patients receiving non-VKA anticoagulant medications)
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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CLINICAL SITE Klinik am See, Rehabilitation Clinic for Cardiovascular Diseases, Ruedersdorf/Berlin.
Rüdersdorf, Germany
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