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| Name | Class |
|---|---|
| Carebook Technologies Inc. | UNKNOWN |
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Contactless and widely available health monitoring technologies are of growing interest in the context of the worldwide COVID-19 pandemic. Remote photoplethysmography (rPPG) is a well-studied technology that interprets variations in skin colour related to blood flow which, when analysed with complex mathematical algorithm, generates vital sign readings. This technology has been refined and embedded in a smartphone app designed to acquire heart rate, respiratory rate and oxygen saturation using a front-facing smartphone camera.
Preliminary data comparing the accuracy of smartphone rPPG readings with conventional vital sign monitor readings are promising; however, less than 5% of the population studied in the app development phase had oxygen saturation levels below 95% making it impossible to ensure reliability in these populations.
The goal of this study is to compare readings acquired using this rPPG app with the readings from hospital grade, Health Canada approved vital signs monitors used in healthcare settings with a focus on subject with low oxygen saturations. We will also study other sociodemographic and clinical features that may influence the accuracy of the readings. This will be achieved by recruiting consenting adults presenting to care in acute care settings and a designated COVID outpatient clinic. Vital signs will be acquired using the rPPG app and conventional hospital vital sign monitors simultaneously. Readings will be repeated within 2-5 minutes when time permits. Statistical analysis will be performed to analyze the findings and determine the accuracy and precision of the rPPG app readings.
It is expected that the vital sign readings acquired with the rPPG app will be almost identical to those acquired using hospital-grade monitors for all subjects regardless of age, gender, skin colour, COVID status and relevant comorbidities.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| rPPG Vital Sign Monitor Readings | Experimental | Oxygen saturation, heart rate and respiratory rate obtained with the rPPG app. |
|
| Conventional Vital Sign Monitor Readings | Other | Oxygen saturation, heart rate and respiratory rate obtained with conventional vital sign monitors and manual respiratory rate counts. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Remote Photoplethysmography (rPPG) vital sign acquisition | Device | Subject vital signs will be acquired using the rPPG app simultaneously with the conventional vital sign monitors and manual respiratory rate calculation. |
| Measure | Description | Time Frame |
|---|---|---|
| Accuracy of rPPG heart rate | Accuracy of rPPG heart rate compared to conventional vital sign monitor heart rate readings. Comparison of each paired reading. | immediate; paired reading |
| Accuracy of rPPG oxygen saturation | Accuracy of rPPG oxygen saturation compared to conventional vital sign monitor oxygen saturation readings. Comparison of discrepancy within each paired reading set. | immediate; paired reading |
| Accuracy of rPPG respiratory rate | Accuracy of rPPG respiratory rate compared to manual counting of respiratory rate over 60 seconds. Comparison of discrepancy within each paired reading set. | immediate; paired reading |
| Measure | Description | Time Frame |
|---|---|---|
| Reproducibility of rPPG heart rate readings | Comparison of rPPG heart rate results obtained on a given patient on serial readings within 2 minutes of each other. | 2-5 minutes |
| Reproducibility of rPPG oxygen saturation readings |
| Measure | Description | Time Frame |
|---|---|---|
| Accuracy of rPPG readings by oxygen saturation level | Analysis of accuracy of rPPG vital sign readings when stratified by oxygen saturation per conventional monitors stratified as follows: 95-100%; 90-94%; 85-89%; Less than 85% | immediate; stratified analysis |
| Accuracy of rPPG readings by skin colour |
Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Noura Hassan, MD, MPH | Contact | 514-340-8222 | 29743 | noura.hassan@mcgill.ca |
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Subjects enrolled in the study will be undergoing vital sign monitoring with the rPPG vital sign monitoring app and the conventional vital sign monitor. Readings with each vital sign monitoring technology will be taken simultaneously on all enrolled subjects.
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|
Comparison of rPPG oxygen saturation results obtained on a given patient on serial readings within 2 minutes of each other.
| 2-5 minutes |
| Reproducibility of rPPG respiratory rate readings | Comparison of rPPG respiratory rate results obtained on a given patient on serial readings within 2 minutes of each other. | 2-5 minutes |
Analysis of accuracy of rPPG vital sign readings when stratified by skin colour per the Fitzpatrick scale |
| immediate; stratified analysis |
| Accuracy of rPPG readings by gender | Analysis of accuracy of rPPG vital sign readings when stratified for gender | immediate; stratified analysis |
| Accuracy of rPPG readings by age | Analysis of accuracy of rPPG vital sign readings when stratified by age group | immediate; stratified analysis |
| Accuracy of rPPG readings by comorbidity | Analysis of accuracy of rPPG vital sign readings when stratified for COVID, respiratory conditions, cardiac conditions and vascular conditions. | immediate; stratified analysis |
| ID | Term |
|---|---|
| D018352 | Coronavirus Infections |
| D006331 | Heart Diseases |
| D012120 | Respiration Disorders |
| D014652 | Vascular Diseases |
| ID | Term |
|---|---|
| D003333 | Coronaviridae Infections |
| D030341 | Nidovirales Infections |
| D012327 | RNA Virus Infections |
| D014777 | Virus Diseases |
| D007239 | Infections |
| D002318 | Cardiovascular Diseases |
| D012140 | Respiratory Tract Diseases |
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