RT Journal Article
SR Electronic
T1 Contactless monitoring of respiratory rate (RR) and heart rate (HR) in non-acuity settings: a clinical validity study
JF BMJ Open
JO BMJ Open
FD British Medical Journal Publishing Group
SP e065790
DO 10.1136/bmjopen-2022-065790
VO 12
IS 12
A1 Muralidhar Varma
A1 Trevor Sequeira
A1 Navaneetha Krishnan S Naidu
A1 Yogish Mallya
A1 Amarendranath Sunkara
A1 Praveen Patil
A1 Nagaraj Poojary
A1 Manikanda Krishnan Vaidyanathan
A1 Benoît Balmaekers
A1 Joseph Thomas
A1 Shankar Prasad N
A1 Sulochana Badagabettu
YR 2022
UL http://bmjopen.bmj.com/content/12/12/e065790.abstract
AB Objective Patient monitoring in general wards primarily involves intermittent observation of temperature, heart rate (HR), respiratory rate (RR) and blood pressure performed by the nursing staff. Several hours can lapse between such measurements, and the patient may go unobserved. Despite the growing widespread use of sensors to monitor vital signs and physical activities of healthy individuals, most acutely ill hospitalised patients remain unmonitored, leaving them at an increased risk. We investigated whether a contactless monitoring system could measure vital parameters, such as HR and RR, in a real-world hospital setting.Design A cross-sectional prospective study.Setting and participants We examined the suitability of employing a non-contact monitoring system in a low-acuity setup at a tertiary care hospital in India. Measurements were performed on 158 subjects, with data acquired through contactless monitoring from the general ward and dialysis unit.Outcome measures Vital parameters (RR and HR) were measured using a video camera in a non-acuity setting.Results Three distinct combinations of contactless monitoring afforded excellent accuracy. Contactless RR monitoring was linearly correlated with Alice NightOne and manual counts, presenting coefficients of determination of 0.88 and 0.90, respectively. Contactless HR monitoring presented a coefficient of determination of 0.91. The mean absolute errors were 0.84 and 2.15 beats per minute for RR and HR, respectively.Conclusions Compared with existing Food and Drug Administration-approved monitors, the findings of the present study revealed that contactless monitoring of RR and HR accurately represented study populations in non-acuity settings. Contactless video monitoring is an unobtrusive and dependable method for monitoring and recording RR and HR. Further research is needed to validate its dependability and utility in other settings, including acute care.Trial registration number CTRI/2018/11/016246.Data are available on resonable request. Data supporting the findings of this study are available upon request from the corresponding author.