A Chest Patch for Continuous Vital Sign Monitoring : Clinical Validation Study During Movement and Controlled Hypoxia

©Carlos Morgado Areia, Mauro Santos, Sarah Vollam, Marco Pimentel, Louise Young, Cristian Roman, Jody Ede, Philippa Piper, Elizabeth King, Owen Gustafson, Mirae Harford, Akshay Shah, Lionel Tarassenko, Peter Watkinson. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 15.09.2021..

BACKGROUND: The standard of care in general wards includes periodic manual measurements, with the data entered into track-and-trigger charts, either on paper or electronically. Wearable devices may support health care staff, improve patient safety, and promote early deterioration detection in the interval between periodic measurements. However, regulatory standards for ambulatory cardiac monitors estimating heart rate (HR) and respiratory rate (RR) do not specify performance criteria during patient movement or clinical conditions in which the patient's oxygen saturation varies. Therefore, further validation is required before clinical implementation and deployment of any wearable system that provides continuous vital sign measurements.

OBJECTIVE: The objective of this study is to determine the agreement between a chest-worn patch (VitalPatch) and a gold standard reference device for HR and RR measurements during movement and gradual desaturation (modeling a hypoxic episode) in a controlled environment.

METHODS: After the VitalPatch and gold standard devices (Philips MX450) were applied, participants performed different movements in seven consecutive stages: at rest, sit-to-stand, tapping, rubbing, drinking, turning pages, and using a tablet. Hypoxia was then induced, and the participants' oxygen saturation gradually reduced to 80% in a controlled environment. The primary outcome measure was accuracy, defined as the mean absolute error (MAE) of the VitalPatch estimates when compared with HR and RR gold standards (3-lead electrocardiography and capnography, respectively). We defined these as clinically acceptable if the rates were within 5 beats per minute for HR and 3 respirations per minute (rpm) for RR.

RESULTS: Complete data sets were acquired for 29 participants. In the movement phase, the HR estimates were within prespecified limits for all movements. For RR, estimates were also within the acceptable range, with the exception of the sit-to-stand and turning page movements, showing an MAE of 3.05 (95% CI 2.48-3.58) rpm and 3.45 (95% CI 2.71-4.11) rpm, respectively. For the hypoxia phase, both HR and RR estimates were within limits, with an overall MAE of 0.72 (95% CI 0.66-0.78) beats per minute and 1.89 (95% CI 1.75-2.03) rpm, respectively. There were no significant differences in the accuracy of HR and RR estimations between normoxia (≥90%), mild (89.9%-85%), and severe hypoxia (<85%).

CONCLUSIONS: The VitalPatch was highly accurate throughout both the movement and hypoxia phases of the study, except for RR estimation during the two types of movements. This study demonstrated that VitalPatch can be safely tested in clinical environments to support earlier detection of cardiorespiratory deterioration.

TRIAL REGISTRATION: ISRCTN Registry ISRCTN61535692; https://www.isrctn.com/ISRCTN61535692.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:23

Enthalten in:

Journal of medical Internet research - 23(2021), 9 vom: 15. Sept., Seite e27547

Sprache:

Englisch

Beteiligte Personen:

Morgado Areia, Carlos [VerfasserIn]
Santos, Mauro [VerfasserIn]
Vollam, Sarah [VerfasserIn]
Pimentel, Marco [VerfasserIn]
Young, Louise [VerfasserIn]
Roman, Cristian [VerfasserIn]
Ede, Jody [VerfasserIn]
Piper, Philippa [VerfasserIn]
King, Elizabeth [VerfasserIn]
Gustafson, Owen [VerfasserIn]
Harford, Mirae [VerfasserIn]
Shah, Akshay [VerfasserIn]
Tarassenko, Lionel [VerfasserIn]
Watkinson, Peter [VerfasserIn]

Links:

Volltext

Themen:

Chest patch
Clinical validation
Heart rate
Journal Article
Remote monitoring
Research Support, Non-U.S. Gov't
Respiratory rate
Vital signs
Wearable

Anmerkungen:

Date Completed 28.10.2021

Date Revised 07.11.2023

published: Electronic

Citation Status MEDLINE

doi:

10.2196/27547

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM330661566