The aim of the study is to experimentally compare measured perfusion index values between smartwatch and a medical grade pulse oximeter in healthy subjects at rest and with and without motion artifacts and during exercise.
Healthy Adult Volunteer
Post-traumatic upper limb conditions affecting finger or arm perfusion
Injuries or diseases of the skin of the fingers and arm
Any acute phase of any disease
Single group
Resting conditions
Other interventionThe volunteers hand is at rest and Perfusion index readings are taken for six minutes from pulse oximeter and smartwatch
Movement artifacts
Other interventionThe volunteer periodically spreads his/her fingers and clenches them into a fist, and Perfusion index readings are taken for six minutes from pulse oximeter and smartwatch.
Circulation constriction
Other interventionThe volunteers arm is constricted using a cuff to measure non-invasive blood pressure. The perfusion index value is monitored during the time of cuff pressure and cuff release. The measurement is followed by a 4-minute pause to allow the vascular supply to stabilize. The measurement is repeated three times.
Physical exercise
Other interventionThe volunteer is seated on the exercise bike, rests his forearms on the handlebars and is instructed not to move his arms. The volunteer\'s heart rate is controlled to increase to 120 beats per minute. For five minutes, the perfusion index is recorded from a pulse oximeter and smartwatch.
Comparison of measured perfusion index values between pulse oximeter and smartwatch during different interventions.
The comparison of measured perfusion index values between pulse oximeter and smartwatch during different interventions (Resting conditions, Movement artifacts, Circulation costriction and Physical exercise) will be analyzed.
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