Estimation of Average and Beat-to-beat Heart Rate With a Novel Wrist-worn PPG Device in Surgery Patients

Study Overview
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Brief Summary
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The aim of the study is to the reliability and feasibility of a novel optical heart rate monitor in hospital patients. Especially patients with atrial fibrillation are included. Patients will be monitored for two hours during routine post-operative care. The data from study device will be compared to routine monitoring. The design of the study is a Pilot feasibility study.

Detailed Description
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The primary use of photoplethysmography (PPG) measurement in clinical settings is usually the determination of the blood oxygen saturation level of the patient. The same device often reports also an average pulse rate of the subject. If the subject has low blood perfusion in the hands or suffers from acute atrial fibrillation, the determination of the pulse rate is challenging and therefore the readings provided by current technology are unreliable. Optical heart rate monitors (OHR) have recently become popular in sports and wellness applications and their performance in healthy subjects having normal blood perfusion in the extremities is well studied and documented and good accuracy has been shown healthy subjects. The performance of wrist-worn OHR monitors in hospital patients, however, has not been extensively studied. The aim of the study is to test novel wrist-worn photoplethysmographic (PPG) device in surgery patients and study its feasibility in detecting heart rate and beat to beat heart rate of patients having normal sinus rhythm or arrhythmia, such as atrial fibrillation (AF).

Official Title
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Estimation of Average and Beat-to-beat Heart Rate With a Novel Wrist-worn PPG Device in Surgery Patients

Conditions
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Atrial Fibrillation

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age: > 18 years Subjected to surgery at Tampere University Hospital Spontaneously ventilating Volunteering for the study Able to give a written informed consent Exclusion Criteria: Having a cardiac pacemaker Surgical operation performed in wrist area or any other reason that prevents placing the wrist-worn device in correct location Neurological disease (e.g. Parkinson's) possibly causing notable amount of shivering Non-Caucasian skin colour Inability to give an informed consent Denial of participation

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Patients with sinus Rhythm<br>Patients with sinus rhythm at the beginning of monitoring | |
| Atrial fibrillation<br>Patients with atrial fibrillation at the beginning of monitoring | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Recognition of the rhythm | To verify that average heart rate (HR) and beat-to-beat heart rate estimation is reliable also with hospital patients having either normal sinus rhythm, atrial fibrillation, or other arrhythmia | 2 hours | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| quantification of estimation errors | To quantify the estimation errors of aforementioned parameters by comparing them to reference values obtained from the ECG | 2 hours | 
| identification of PPG morphology | To quantify difference in morphological and other features calculated from the PPG signals collected from sinus-rhythm and AF patients | 2 hours | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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postoperative monitoring, plethysmography, monitoring