TY - GEN
T1 - Preliminary investigation of pupil size variability
T2 - 2006 3rd IEEE-EMBS International Summer School and Symposium on Medical Devices and Biosensors, ISSS-MDBS 2006
AU - Hung, K
AU - Zhang, YT
PY - 2006
Y1 - 2006
N2 - World's aging population and prevalence of chronic diseases have led to growing interest in the development of home-based wearable biomedical sensors for patient-monitoring. Monitoring of the pupil's properties is a feasible alternative application, as it has the advantages of non-invasive and non-contact measurement, as well as feasible implementation using wearable image sensors. Recent researches have discovered the presence of heart rate variability (HRV) and blood pressure variability (BPV) frequency components in pupil size variability (PSV). Aims of this study are to investigate effect of physical exercise on PSV spectrum, and to address the feasibility of PSV monitoring. Electrocardiogram, respiration effort, finger arterial pressure, and pupil images were recorded from ten subjects before and after exercise. Normalized high frequency (0.15 - 0.5Hz) power of PSV in seven subjects and total (0.04 - 0.5Hz) power of PSV in nine subjects decreased after exercise, followed by an increase during recovery. The patterns of changes are generally paralleled by corresponding indexes from spectra of HRV and BPV. Preliminary results suggest that PSV has the potential to be a novel physiological indicator used in patient-monitoring.
AB - World's aging population and prevalence of chronic diseases have led to growing interest in the development of home-based wearable biomedical sensors for patient-monitoring. Monitoring of the pupil's properties is a feasible alternative application, as it has the advantages of non-invasive and non-contact measurement, as well as feasible implementation using wearable image sensors. Recent researches have discovered the presence of heart rate variability (HRV) and blood pressure variability (BPV) frequency components in pupil size variability (PSV). Aims of this study are to investigate effect of physical exercise on PSV spectrum, and to address the feasibility of PSV monitoring. Electrocardiogram, respiration effort, finger arterial pressure, and pupil images were recorded from ten subjects before and after exercise. Normalized high frequency (0.15 - 0.5Hz) power of PSV in seven subjects and total (0.04 - 0.5Hz) power of PSV in nine subjects decreased after exercise, followed by an increase during recovery. The patterns of changes are generally paralleled by corresponding indexes from spectra of HRV and BPV. Preliminary results suggest that PSV has the potential to be a novel physiological indicator used in patient-monitoring.
KW - Blood pressure variability
KW - Heart rate variability
KW - Pupil size variability
KW - Pupillary model
UR - http://www.scopus.com/inward/record.url?scp=34547302363&partnerID=8YFLogxK
U2 - 10.1109/ISSMDBS.2006.360118
DO - 10.1109/ISSMDBS.2006.360118
M3 - Conference contribution
AN - SCOPUS:34547302363
SN - 0780397878
SN - 9780780397873
T3 - Proceedings of the 3rd IEEE-EMBS International Summer School and Symposium on Medical Devices and Biosensors, ISSS-MDBS 2006
SP - 137
EP - 140
BT - Proceedings of the 3rd IEEE-EMBS International Summer School and Symposium on Medical Devices and Biosensors, ISSS-MDBS 2006
Y2 - 4 September 2006 through 6 September 2006
ER -