Comparing Accuracy Between Cuffless Wrist Worn and Cuffed Ambulatory BP Monitoring Devices

Inclusion criteria

• Participant is aged ≥21 years and <85 years at the time of screening visit.
• Able to speak and understand English.
• Able and willing to give informed consent.
• Independent and mobile.
• Willing and able to wear devices/no upper limb restrictions.

Exclusion criteria

• Individuals who are or have been involved in interventional research within a period of 3 months.
• Vulnerable individuals including those with mental ill-health or who are care dependant.
• Individuals with serious comorbidities or end organ damage (e.g., previously diagnosed heart failure with New York Heart Association class III/IV, verbal or documented evidence of renal failure or history of dialysis, stroke or myocardial infarction within the last 1-year, previous stroke with residual deficit); and doctor diagnosed hyperthyroidism.
• Individuals with arterio-venous fistula; or reduced peripheral perfusion identified by a history of Raynaud's syndrome or a pulse pressure of <30mmHg or a capillary refill time of >3s in the dominant arm.
• Individuals with heart rhythm disorders e.g., persistent Atrial Fibrillation and those who have tachycardia > 120 after 5 minutes of rest.
• Individuals with skin irritation injury or damage.
• Self-reported pregnancy. Participation will be withdrawn in the event of pregnancy following enrolment.
• Life threatening or terminal illness with limited lifespan of <12months.
• Obesity (Body Mass Index 35kg/m2 or higher) or arm/wrist circumferences outside the range highlighted in each device's specification.
• Those with very high office BP (greater than Stage 3 hypertension).
• Interarm difference >15mmHg in Systolic BP and >10mmHg in Diastolic BP.
• Where the PI thinks that it would be technically difficult to obtain or interpret blood pressures measurements.