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Testing a smartphone fingertip video method to screen for high blood pressure

Compares smartphone fingertip video readings with a standard cuff in adults for blood pressure.

Key facts

Who runs it
Centre Hospitalier Universitaire Vaudois
Where
Lausanne, SwitzerlandSee the 2 sites
Trial code
Registry title
Smartphone Blood Pressure Measurement to Screen for Hypertension
Status
Recruiting
People taking part
100 people, planned
Started
1 Sept 2024
Expected to end
30 Dec 2026
Type of study
Observational, 2 groups
Treatments tested
  • Blood pressure measurement
Record updated
27 March 2026

Who can take part

AI summary

From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.

The trial is looking for adults who measure their blood pressure with a smartphone at the fingertip and with a standard cuff. One group is presumed healthy volunteers. The other is people suspected of having high blood pressure.

Age
Older than 18 years, and not older than 80 years.
Sex
Men and women can join.
Disease stage
Presumed healthy volunteers, or people with suspected high blood pressure sent for home blood pressure monitoring.

Main reasons for not taking part

  • Unstable heart condition, such as a heart attack in the last week
  • End-stage kidney disease or dialysis
  • Diabetes mellitus
  • Heart rhythm problem (arrhythmia)
  • Known pregnancy

The registry criteria, word for word

Show all 17 criteriaShow less

Who can take part

  • Informed consent as documented by signature
  • Men or women older than 18 years old
  • Good understanding of written and oral speaking used at the center where the study will be carried out

Who cannot take part

  • Known or suspected non-compliance (e.g. drug or alcohol abuse, language problems, psychological disorders, dementia)
  • Known unstable cardiac condition (myocardial infarction < 1 week, decompensated heart failure, pulmonary embolism)
  • Diabetes mellitus [15] [8]
  • Known (or assessed by recording heart rate and using pulse palpation, as recommended in ESC/ESH guidelines [1]) cardiac arrhythmia (atrial fibrillation, numerous extrasystoles and important bradycardia/bradyarrhythmia, bigeminy, trigeminy, isolated VPB) [4] [1] [7] [15] [17]
  • End-stage renal disease (GFR < 15/min/1.73m2 and/or dialysis) [4] [14] [15] [16]
  • Patients older than 80 years old [4] [13]
  • Patients that cannot sign informed consent
  • Patients in emergency situation, are not legally competent, cannot understand the situation or are vulnerable
  • Unable to participate due to pain or stress [12]
  • Known pregnancy
  • SBP or DBP difference between two arms >10 mmHg [8] [18]
  • Patient with finger lesions that would alter the correct capture of signals by the mobile phone
  • Known mobile phone contact dermatitis (caused by metal allergens, notably nickel and chromium
  • Incapacity of properly using the smartphone (i.e. incapacity of obtaining a recording with sufficient signal quality after the dedicated training)

Check if you might fit

Answer for yourself. This is not a decision: only the study team can say whether you can take part.

  • Are you between 18 and 80 years old?

Where in Switzerland

  • University Hospital LausanneLausanne, SwitzerlandContact: PATRICK SCHOETTKER, ProfTaking people
  • University Hospital Lausanne, CHUVLausanne, SwitzerlandContact: Patrick Schoettker, PhDTaking people

About the trial

What the trial wants to find out

The goal of this observational study is to assess the feasibility of classifying people whose blood pressures are within hypertensive range using a machine-learning approach based on features derived from smartphone video data recorded at the patient's fingertips. The main question[s] it aims to answer are:

Read full original descriptionShow less

Is a smartphone a reliable device for high blood pressure screening ? Is a smartphone a reliable device for blood pressure monitoring ? Participants will record their blood pressure with a smartphone at their fingertips and with an approved cuff device, 3 times in the morning and 3 times in the evening for 7 days. There will be two groups, a volunteer presumed healthy, and a volunteer addressed for a Home Blood pressure monitoring with the diagnosis of hypertension suspected.

Researchers will compare the two groups to see if the smartphone can be reliable in terms of diagnosis and monitoring of the blood pressure comparing to a standard cuff device.

The 2 groups in the trial

  • Volunteer presumed healthy

    People presumed healthy undergoing blood pressure measurement with a standard cuff device and with a Smartphone

    Treatment: Blood pressure measurement

  • Volunteer suspected of arterial hypertension

    People addressed for a suspected diagnosis of arterial hypertension undergoing a home blood pressure monitoring and measurements with a smartphone

    Treatment: Blood pressure measurement

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

Print a page for my doctor

Data and sources

Registry record
Listed on ClinicalTrials.gov.
Official title
Assessing the Feasibility of Classifying People Using a Machine-learning Approached Based on Features Derived From Smartphone Video Data Recorded at the Person's Fingertip
Plain-language title
Testing a smartphone fingertip video method to screen for high blood pressureGenerated from the registry record. The registry title is the official one.
AI summary
From the trial's eligibility criteria. Read by machine on 12 November 2026.
Fit questions
Built from NCT06577688, who can take part
Record updated
27 March 2026