Recording of Physiological Data Via an Optical Sensor At the Fingertip Alongside with Double Auscultatory and Pulse Oximetry to Evaluate the Effectiveness of an Optical Blood Pressure Monitoring (OBPM)

• Investigational device Aktiia G2C (Device): Study subjects are asked to stay seated and relaxed while successive measurements are taken with Aktiia G2C.
• Marketed device used as reference for blood pressure monitoring: double auscultation cuff (Device): Study subjects are asked to stay seated and relaxed while successive measurements are taken with cuff for double auscultation.
• Marketed device used as comparative device for blood pressure and pulse rate monitoring: Aktiia Bracelet G2 (Device): Study subjects are asked to stay seated and relaxed while successive measurements are taken with Aktiia Bracelet G2.
• Marketed device used as comparative device for blood pressure and pulse rate monitoring: oscillometric upper-arm cuff (Device): Study subjects are asked to stay seated and relaxed while taking successive measurements with an oscillometric upper-arm cuff.
• Marketed device used as comparative device for blood pressure and pulse rate monitoring: oscillometric wrist cuff (Device): Study subjects are asked to stay seated and relaxed while taking successive measurements with an oscillometric wrist cuff.
• Marketed device used as reference for pulse rate monitoring: pulse finger oximeter (Device): Study subjects are asked to stay seated and relaxed while successive measurements are taken with pulse finger oximeter.

Primary outcomes

• Number of study subjects that contribute with analyzable raw data collected [1 hour]: Min 85 study subjects contribute with analyzable raw data collected

Secondary outcomes

• Blood pressure mean value of differences [1 hour]: The mean value of the differences between Aktiia G2C and double auscultation blood pressure measurements.
• Blood pressure standard deviation of differences [1 hour]: The mean value of the differences between Aktiia G2C and double auscultation blood pressure measurements.
• Pulse rate root-mean-square error [1 hour]: The root-mean-square difference between the Aktiia G2C pulse rate determinations and the reference method.

Sex: All, ages: 21 Years to 85 Years, accepts healthy volunteers

Inclusion Criteria:

* Subjects aged 21 to 85yo
* Subjects fluent in written and spoken French
* Subjects agreeing to attend the study visit and follow study procedures
* Subjects that have signed the informed consent form.

Exclusion Criteria:

* Amputated index fingers
* Damaged/injured skin at index fingers
* Damaged/injured skin at wrists
* Subjects suffering from sustained cardiac arrhythmias that can lead to weak or unstable pressure pulses including tachycardia (heart rate at rest > 120bpm) and atrial fibrillation
* Subjects suffering from pathologies that systematically reduce peripheral perfusion including Raynaud's disease, diabetes, renal dysfunctions (eGFR < 30mL/min/1.73 m2), hyper-/hypothyroidism, pheochromocytoma or arteriovenous fistula
* Pregnant women
* Polyneuropathy

• Results publication: Zahnd J, Thompson B, Rigon PA, Taffe P, Wuerzner G. Comparison of two validated oscillometric devices in a home-like setup reveals pronounced blood pressure differences and reduced precision. Hypertens Res. 2026 Mar;49(3):969-973. doi: 10.1038/s41440-025-02514-3. Epub 2026 Jan 9. PMID 41514019