Postmarket Clinical Follow-up Study to Confirm the Performance of the Wearable Pulse-Oximeter BrOxy M (SOMBRERO)

Inclusion Criteria: 1. Healthy subjects of both sexes with an age ≥ 18 and ≤ 50. 2. American Society of Anesthesiology (ASA) classification 1 3. Positive Allen's test 4. Intact and healthy skin on the selected wrist 5. Wrist circumference diameter between 150 mm e 200 mm. 6. Normal electrocardiogram (ECG) obtained at screening or within 2 months prior to screening 7. Ability to understand and execute the required study procedures and provide an informed consent to the study Exclusion Criteria: 1. Presence of at least one of the following altered hemoglobin parameters at screening: 1. Alpha-hemoglobin (αHb) ≤ 10 gr/dl 2. Carboxy-hemoglobin (COHb) ≥ 3% 3. Methaemoglobin (MetHb) ≥ 2% 2. For pre-menopausal female subjects only: positive pregnancy test performed at screening on urines or capillary blood 3. Presence of any cardiovascular pathology in medical history. 4. Any episodes of respiratory infection during the 30 days prior to screening 5. Any prior experience of Dyspnea 6. Hospitalization during the 2 months prior to screening, for any reason. 7. Chronic drug intake known to interfere with gaseous exchanges or induce changes in cardiac frequency 8. Presence of any medical condition not allowing the subject to perform the required test 9. Known allergy to adhesive tapes 10. Participation in an interventional study with a medicinal product or a medical device in the 30 days prior to screening.