An Ear-Worn Vital Signs Monitor.
case_series · Level IV
Where this comes from
- Record sourced from PubMed, PMID 26208264.
- Also identified by DOI 10.1109/TBME.2015.2459061 and PMC identifier 5462526.
- No licence information is recorded for this record.
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Abstract
This paper presents a wearable vital signs monitor at the ear. The monitor measures the electrocardiogram (ECG), ballistocardiogram (BCG), and photoplethysmogram (PPG) to obtain pre-ejection period (PEP), stroke volume (SV), cardiac output (CO), and pulse transit time (PTT). The ear is demonstrated as a natural anchoring point for the integrated sensing of physiological signals. All three signals measured can be used to obtain heart rate (HR). Combining the ECG and BCG allows for the estimation of the PEP, while combining the BCG and PPG allows for the measurement of PTT. Additionally, the J-wave amplitude of the BCG is correlated with the SV and, when combined with HR, yields CO. Results from a clinical human study on 13 subjects demonstrate this proof-of-concept device.
Medical subject headings
- Heart Function Tests
- Photoplethysmography