The goal of this study is to learn how accurate smartwatches are at measuring oxygen levels in patients with a condition called pulmonary hypertension. The main questions it aims to answer are:
* How accurate the smartwatches are at measuring oxygen levels when the patient is sitting at rest * How accurate are smartwatches at measuring oxygen levels after exercise * How accurate are smartwatches at measuring oxygen levels after breathing a lower level of oxygen through a mask.
Researchers will compare oxygen levels measured through a smartwatch with those checked through a finger probe oxygen monitor and also from a blood sample checked from the artery in the wrist to see if smartwatch oxygen measurements are similar.
Participants will:
-Attend the hospital once, just for a few hours to collect all the required data.
Aged 18-years old and above.
Diagnosed with pulmonary hypertension by right heart catheterisation showing a baseline mean pulmonary artery pressure > 20mmHg, PVR >2 Woods Units.
Able to perform a six-minute walk test (6MWT)
Able to give written informed consent.
Peripheral arterial disease
Tattoos or skin markings which cover the dorsal wrist.
Resting SpO2 <88%
Severe concurrent medical condition that would prevent participation in study procedures or with life expectancy <3 months
Patients attending outpatient clinic at the Golden Jubilee National Hospital under the care of the Scottish Pulmonary Vascular Unit.
Other
Cross-sectional
Not listed
Agreement of oxygen saturations (SpO2) measured by the wrist-worn pulse oximeter when compared with arterial blood gas oxygen saturations (SaO2) at rest
SpO2 (measured by the wrist-worn pulse oximeter (smartwatch) and standard fingerprobe pulse oximeter) and SaO2 (measured by the arterial blood gas analysis) measured as a percentage.
1. Agreement of oxygen saturations (SpO2) measured by the wrist-worn pulse oximeter when compared with arterial blood gas oxygen saturations (SaO2) after exercise
SpO2 (measured by the wrist-worn pulse oximeter (smartwatch) and standard fingerprobe pulse oximeter) and SaO2 (measured by arterial blood gas analysis) measured as a percentage after exercise
1. Agreement of oxygen saturations (SpO2) measured by the wrist-worn pulse oximeter when compared with arterial blood gas oxygen saturations (SaO2) after a hypoxic challenge
SpO2 (measured by the wrist-worn pulse oximeter (smartwatch) and standard fingerprobe pulse oximeter) and SaO2 (measured by arterial blood gas analysis) measured as a percentage, after a hypoxic challenge test.
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