The wearable radio-frequency sensor demonstrated high correlation with reference devices for measuring heart rate (r = 0.95), respiratory rate (r = 0.93), and respiratory volume (r = 0.84).
Observational (n=20)
No
Does an over-clothing wearable radio-frequency sensor accurately measure heart rate, respiratory rate, and respiratory volume compared to reference devices in healthy participants?
A novel over-clothing wearable radio-frequency sensor can accurately measure heart rate, respiratory rate, and respiratory volume in healthy individuals, offering a potential non-invasive monitoring solution.
Effect estimate: r = 0.95 (HR), r = 0.93 (RR), r = 0.84 (RV)
Abstract Many health diagnostic systems demand noninvasive sensing of respiratory rate, respiratory volume, and heart rate with high user comfort. Previous methods often require multiple sensors, including skin-touch electrodes, tension belts, or nearby off-the-body readers, and hence are uncomfortable or inconvenient. This paper presents an over-clothing wearable radio-frequency sensor study, conducted on 20 healthy participants (14 females) performing voluntary breathing exercises in various postures. Two prototype sensors were placed on the participants, one close to the heart and the other below the xiphoid process to couple to the motion from heart, lungs and diaphragm, by the near-field coherent sensing principle. We can achieve a satisfactory correlation of our sensor with the reference devices for the three vital signs: heart rate ( r = 0.95), respiratory rate ( r = 0.93) and respiratory volume ( r = 0.84). We also detected voluntary breath-hold periods with an accuracy of 96%. Further, the participants performed a breathing exercise by contracting abdomen inwards while holding breath, leading to paradoxical outward thorax motion under the isovolumetric condition, which was detected with an accuracy of 83%.
Sharma et al. (Tue,) conducted a observational in Healthy (n=20). Wearable radio-frequency (RF) near-field coherent sensing (NCS) sensor vs. Reference devices (BIOPAC ECG, chest belts, pneumotachometer) was evaluated on Correlation of NCS sensor with reference devices for heart rate, respiratory rate, and respiratory volume (r = 0.95 (HR), r = 0.93 (RR), r = 0.84 (RV)). The wearable radio-frequency sensor demonstrated high correlation with reference devices for measuring heart rate (r = 0.95), respiratory rate (r = 0.93), and respiratory volume (r = 0.84).