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Blood PressureNCT04027777

Aktiia OPBM Single-center Prospective Observational Study Against Double Auscultation

A study testing Aktiia.product-P0 in people with Blood Pressure, run by Aktiia SA at 1 site in Switzerland.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

Single-centre prospective observational study to validate the performance of the Aktiia SA optical blood pressure monitoring (OBPM) device at the wrist against blood pressure measurements obtained by double auscultation at the upper arm during four weeks Read more about this study

Who is it for?
Ages 21 to 85 yearsHealthy volunteers can take part
Conditions the study is for
Blood Pressure
What is being tested?
Aktiia.product-P0
Type of treatment
Medical device
Could I receive a placebo?
No, everyone receives an active treatment
How many people
355 participants
Where
1 siteSwitzerland
Study dates
6 Aug 2019to 31 Dec 2027
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 21 to 85 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Adult subjects (aged between 21 and 65 years old)
  • Subjects fluent in written and spoken French
  • Subjects agreeing to attend the totality of 4 visits
  • Subjects that have signed the informed consent form
  • Adult subjects (aged between 21 and 65 years old)
  • Subjects fluent in written and spoken French
Show all 12Show fewer
  • Subjects agreeing to attend the totality of 4 visits
  • Subjects that have signed the informed consent form
  • Adult subjects (aged between 65 and 85 years old)
  • Subjects fluent in written and spoken French
  • Subjects agreeing to attend the totality of 4 visits
  • Subjects that have signed the informed consent form

Who cannot join

  • Subjects with tachycardia (heart rate at rest > 120bpm)
  • Subjects with atrial fibrillation
  • Subjects with diabetes
  • Subjects with renal dysfunctions (eGFR < 60mL/min/1.73 m2)
  • Subjects with hyper-/hypothyroidism
  • Subjects with pheochromocytoma
Show all 170Show fewer
  • Subjects with Raynaud's disease
  • Subjects with trembling and shivering
  • Subjects with interarm systolic difference > 15 mmHg
  • Subjects with interarm diastolic difference > 10 mmHg
  • Subjects with arm paralysis
  • Women in known pregnancy
  • Subjects with an arteriovenous fistula
  • Subjects with arm amputations
  • Subjects with the upper arm circumference > 64 cm
  • Subjects with the wrist circumference > 22 cm (limitation due Aktiia.bracelet-P0 size)
  • Subjects with the central phalanx of the middle finger circumference > 71 mm or < 43 mm
  • Subjects with the exfoliative skin diseases (limitation due to participant discomfort)
  • Subjects with lymphoedema (limitation due to participant discomfort)
  • ARM2
  • Subjects with tachycardia (heart rate at rest > 120bpm)
  • Subjects with atrial fibrillation
  • Subjects with hyper-/hypothyroidism
  • Subjects with pheochromocytoma
  • Subjects with Raynaud's disease
  • Subjects with trembling and shivering
  • Subjects with interarm systolic difference > 15 mmHg
  • Subjects with interarm diastolic difference > 10 mmHg
  • Subjects with arm paralysis
  • Women in known pregnancy
  • Subjects with an arteriovenous fistula
  • Subjects with arm amputations
  • Subjects with the upper arm circumference > 64 cm
  • Subjects with the wrist circumference > 22 cm (limitation due Aktiia.bracelet-P0 size)
  • Subjects with the central phalanx of the middle finger circumference > 71 mm or < 43 mm
  • Subjects with the exfoliative skin diseases (limitation due to participant discomfort)
  • Subjects with lymphoedema (limitation due to participant discomfort)
  • ARM3
  • Subjects with tachycardia (heart rate at rest > 120bpm)
  • Subjects with atrial fibrillation
  • Subjects with diabetes
  • Subjects with renal dysfunctions (eGFR < 60mL/min/1.73 m2)
  • Subjects with hyper-/hypothyroidism
  • Subjects with pheochromocytoma
  • Subjects with Raynaud's disease
  • Subjects with trembling and shivering
  • Subjects with interarm systolic difference > 15 mmHg
  • Subjects with interarm diastolic difference > 10 mmHg
  • Subjects with arm paralysis
  • Women in known pregnancy
  • Subjects with an arteriovenous fistula
  • Subjects with arm amputations
  • Subjects with the upper arm circumference > 64 cm
  • Subjects with the wrist circumference > 22 cm (limitation due Aktiia.bracelet-P0 size)
  • Subjects with the central phalanx of the middle finger circumference > 71 mm or < 43 mm
  • Subjects with the exfoliative skin diseases (limitation due to participant discomfort)
  • Subjects with lymphoedema (limitation due to participant discomfort)
  • ARM 4
  • The study arm will include:
  • Adult subjects aged between 21 and 85 years old
  • Subjects with renal dysfunctions (eGFR < 60mL/min/1.73 m2)
  • Subjects fluent in written and spoken French
  • Subjects agreeing to attend the totality of 4 visits
  • Subjects residing within 100 km of the CHUV site
  • Subjects able to pedal with an ergocycle
  • Subjects that have signed the informed consent form
  • The study will exclude:
  • Subjects undergoing dialysis treatment
  • Subjects with tachycardia (heart rate at rest > 120bpm)
  • Subjects with atrial fibrillation
  • Subjects with diabetes
  • Subjects with untreated hyper-/hypothyroidism
  • Subjects with pheochromocytoma
  • Subjects with Raynaud's disease
  • Subjects with trembling and shivering
  • Subjects with interarm systolic difference > 15 mmHg
  • Subjects with interarm diastolic difference > 10 mmHg
  • Subjects with arm paralysis
  • Women in known pregnancy
  • Subjects with an arteriovenous fistula
  • Subjects with arm amputations
  • Subjects with the upper arm circumference > 64 cm
  • Subjects with the wrist circumference > 23 cm
  • Subjects with the central phalanx of the middle finger circumference > 71 mm or < 43 mm
  • Subjects with the exfoliative skin diseases
  • Subjects with lymphoedema
  • ARM 5
  • The study arm will include:
  • Adult subjects aged between 21 and 85 years old
  • Subjects with chronic systolic heart failure (Heart Failure with reduce Ejection Fraction), defined by a left ventricular ejection fraction (LVEF) of less than or equal to 40%, confirmed by Echocardiography or MRI
  • Subjects fluent in written and spoken French
  • Subjects agreeing to attend the totality of 4 visits
  • Subjects residing within 100 km of the CHUV site
  • Subjects able to pedal with an ergocycle
  • Subjects that have signed the informed consent form
  • The study will exclude:
  • Subjects with tachycardia (heart rate at rest > 120bpm)
  • Subjects with atrial fibrillation
  • Subjects with diabetes
  • Subjects with renal dysfunctions (eGFR < 60mL/min/1.73 m2)
  • Subjects with untreated hyper-/hypothyroidism
  • Subjects with pheochromocytoma
  • Subjects with Raynaud's disease
  • Subjects with trembling and shivering
  • Subjects with interarm systolic difference > 15 mmHg
  • Subjects with interarm diastolic difference > 10 mmHg
  • Subjects with arm paralysis
  • Women in known pregnancy
  • Subjects with an arteriovenous fistula
  • Subjects with arm amputations
  • Subjects with the upper arm circumference > 64 cm
  • Subjects with the wrist circumference > 23 cm
  • Subjects with the central phalanx of the middle finger circumference > 71 mm or < 43 mm
  • Subjects with the exfoliative skin diseases
  • Subjects with lymphoedema
  • ARM 6
  • The study arm will include:
  • Subjects who are adult females aged 21 years or older
  • Subjects who are pregnant beyond the first trimester, with a gestational age of more than 12 weeks, confirmed by documentation from a gynecologist
  • Subjects not requiring hospitalization
  • Subjects fluent in written and spoken French
  • Subjects agreeing to attend the totality of 4 visits
  • Subjects residing within 100 km of the CHUV site.
  • Subjects that have signed the informed consent form
  • The study will exclude:
  • Subjects with tachycardia (heart rate at rest > 120bpm
  • Subjects with atrial fibrillation
  • Subjects with diabetes
  • Subjects with renal dysfunctions (eGFR < 60mL/min/1.73 m2)
  • Subjects with untreated hyper/hypotyroidism not related to pregnancy changes
  • Subjects with pheochromocytoma
  • Subjects with Raynaud's disease
  • Subjects with trembling and shivering
  • Subjects with interarm systolic difference > 15 mmHg
  • Subjects with interarm diastolic difference > 10 mmHg
  • Subjects with arm paralysis
  • Subjects with an arteriovenous fistula
  • Subjects with arm amputations
  • Subjects with the upper arm circumference > 64 cm
  • Subjects with the wrist circumference > 23 cm
  • Subjects with the central phalanx of the middle finger circumference > 71 mm or < 43 mm
  • Subjects with the exfoliative skin diseases
  • Subjects with lymphoedema
  • ARM 7
  • The study arm will include:
  • Subjects who are adult females aged 21 years or older
  • Subjects who are postpartum, defined as having given birth within the last 6 weeks and not currently pregnant
  • Subjects fluent in written and spoken French
  • Subjects agreeing to attend the totality of 4 visits
  • Subjects residing within 100 km of the CHUV site.
  • Subjects that have signed the informed consent form
  • The study will exclude:
  • Subjects with tachycardia (heart rate at rest > 120bpm)
  • Subjects with atrial fibrillation
  • Subjects with diabetes
  • Subjects with renal dysfunctions (eGFR < 60mL/min/1.73 m2)
  • Subjects with untreated hyper-/hypothyroidism
  • Subjects with pheochromocytoma
  • Subjects with Raynaud's disease
  • Subjects with trembling and shivering
  • Subjects with interarm systolic difference > 15 mmHg
  • Subjects with interarm diastolic difference > 10 mmHg
  • Subjects with arm paralysis
  • Women in known pregnancy
  • Subjects with an arteriovenous fistula
  • Subjects with arm amputations Subjects with the upper arm circumference > 64 cm
  • Subjects with the wrist circumference > 23 cm
  • Subjects with the central phalanx of the middle finger circumference > 71 mm or < 43 mm
  • Subjects with the exfoliative skin diseases
  • Subjects with lymphoedema.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Josep Sola, PhD contact

+41797689800

josep@aktiia.com

Switzerland1 site, 1 recruiting
  • University of Lausanne Hospitals

    Lausanne, 1011

    Grégoire Wuerzner, MD, +41213141131, gregoire.wuerzner@chuv.ch

    Recruiting

Other trials in Switzerland

About this study

Official title: Single-center Prospective Observational Study to Validate the Performance of the Aktiia Optical Blood Pressure Monitoring (OBPM) Device at the Wrist Against Double Auscultation

Single-centre prospective observational study to validate the performance of the Aktiia SA optical blood pressure monitoring (OBPM) device at the wrist against blood pressure measurements obtained by double auscultation at the upper arm during four weeks

Read the detailed description

According to the World Health Organization, by 2025 hypertension will affect 1.5 billion adults worldwide. Half of the adult population is not diagnosed, and half of the treated population is not at the defined target of BP. Widespread use of out of office BP measurement is one of the proposed strategies to fight against hypertension worldwide.

The current Ambulatory Blood Pressure Monitoring or Home Blood Pressure Monitoring are performed with a cuff placed around the arm. This 110-year-old technology is not only uncomfortable for the patient but can also result in a number of overestimated readings due to the stress induced while inflating the cuff.

Aktiia S.A. has developed an intermittent automated non-invasive cuffless blood pressure monitor determining over a series of cardiac cycles the values of the systolic blood pressure, the diastolic blood pressure and the heart rate. This miniature device is comfortably positioned with a bracelet on a user's wrist. The optical sensors integrated within the device exploit the principle of reflection photoplethysmography (PPG) to capture the user's skin pulsatility (change of arterial diameter occurring at each heartbeat). Aktiia OBPM algorithms are further applied to the recorded PPG signal to determine user's blood pressure and heart rate.

Because the measurement relies on optical sensors, and not on pneumatic cuffs, Aktiia OBPM device provides an increased overall comfort to the patient throughout the monitoring, does not induce sleep arousal during the night measurements and decreases the false positive readings induced by the stress associated with the cuff inflation. Aktiia OBPM device is intended to be used in the long term, as compared to one-day or one-week use of Ambulatory Blood Pressure Monitors.

This study over several visits has been designed to assess both the accuracy and the stability of the Aktiia OBPM. The automaticity of the measurement when performed in different body positions and upon aerobic exercise was also evaluated.

By demonstrating both the accuracy and the stability of the measurements that can be performed in different body positions with a comfortable and miniature Aktiia OBPM device, Aktiia SA aims to make one step further in facilitating blood pressure measurement and monitoring in the out-of-clinic scenarios and integrating blood pressure monitoring into user's daily life. The diagnosis and treatment of hypertension in ambulatory settings is expected to largely benefit from these advancements

Conditions
Blood Pressure
Being tested
Aktiia.product-P0

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Aktiia.product-P0Device

    The optical signals at the wrist are recorded non-invasively by means of the Aktiia.product-P0 investigational device. The BP measurements are further determined from these optical signals and are compared to the reference double auscultation BP readings. A reference-control volume clamp BP reading is recorded simultaneously.

Study groups in NCT04027777
Study groupRoleWhat they receive
Aktiia.product-P0ExperimentalMain study arm including 105 subjects
Receives: Device: Aktiia.product-P0
Aktiia.product-P0 DiabeticsExperimentalSecond study arm including 40 diabetic patients
Receives: Device: Aktiia.product-P0
Aktiia.product-P0 AgedExperimentalThirs study arm including 40 patients aged 65+
Receives: Device: Aktiia.product-P0
Aktiia.product-P0 and subjects with Chronic Kidney diseaseExperimentalAdditional study arm including 40 subjects with chronic kidney disease (ARM 4)
Receives: Device: Aktiia.product-P0
Aktiia.product-P0 and subjects with Heart FailureExperimentalAdditional study arm including 40 subjects with Heart Failure (ARM 5)
Receives: Device: Aktiia.product-P0
Aktiia.product-P0 and Pregnant subjectsExperimentalAdditional study arm including 50 pregnant subjects (ARM 6)
Receives: Device: Aktiia.product-P0
Aktiia.product-P0 and subjects in Post partumExperimentalAdditional study arm including 40 subjects in post partum (ARM 7)
Receives: Device: Aktiia.product-P0

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Blood Pressure absolute Mean Error

    The absolute value of the mean of the differences between Reference and Aktiia.product-P0 blood pressure determinations

    Measured: Up to four weeks

  2. Blood Pressure standard Deviation of the Error

    The standard deviation of the differences between Reference and Aktiia.product-P0 determinations

    Measured: Up to four weeks

Secondary outcomes (1)
  1. Heart Rate root-mean-square error

    The root-mean-square difference between the Aktiia.product-P0 heart rate determinations and the Reference method

    Measured: Up to four weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted22 Jul 2019
  2. Study start6 Aug 2019
  3. Primary completion31 Dec 2027 (estimated)
  4. Study completion31 Dec 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Screening
Allocation
Non-randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
355 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04027777
Sponsor's protocol ID
OBPM_Ambulatory2019
Status last verified
Mar 2026
First submitted
17 Jul 2019
Last updated
6 Apr 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Theiler K, Sola J, Damianaki A, Pfister A, Almeida TP, Alexandre J, Vermare P, Wuerzner G. Performance of the Aktiia optical blood pressure measurement device in the elderly: a comparison with double blinded auscultation in different body positions. Blood Press. 2023 Dec;32(1):2281320. doi: 10.1080/08037051.2023.2281320. Epub 2023 Nov 16.

    PubMed 37971487

Questions about this trial

What is this clinical trial studying?

A study testing Aktiia.product-P0 in people with Blood Pressure, run by Aktiia SA at 1 site in Switzerland.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 12 inclusion and 170 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 6 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Switzerland. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Josep Sola, PhD (+41797689800, josep@aktiia.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Blood Pressure absolute Mean Error (time frame: Up to four weeks). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04027777, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Apr 2026.

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