Title :
Optical assessment of apparent phase velocity: carotid-temporal photoplethysmograph flow waves in response to apnea
Author_Institution :
Biomed. Eng., Rutgers Univ., Piscataway, NJ, USA
Abstract :
Optic sensors of blood flow can provide noninvasive assessment of elastic properties of extracranial vessels. Photoplethysmographic data can be used to assess pulse velocities as blood is transmitted from the carotid to the temporal artery. Apparent phase velocities give much information regarding the transmission of pulse waves by examining frequency characteristics of flow. The apparent phase velocities through this vascular segment increases in periods of apnea, especially in the higher frequency components, indicating response of increased vascular stiffness of the extracranial arteries.
Keywords :
biomechanics; blood flow measurement; blood vessels; cardiovascular system; optical sensors; plethysmography; pneumodynamics; apnea; apparent phase velocity; blood flow frequency characteristics; blood flow optic sensors; carotid; carotid-temporal photoplethysmograph flow waves; extracranial arteries; extracranial vessel elastic properties; optical assessment; pulse velocity; pulse wave transmission; temporal artery; vascular segment; vascular stiffness; Arteries; Biomedical engineering; Biomedical measurements; Biomedical optical imaging; Blood flow; Cardiology; Equations; Frequency; Image motion analysis; Optical sensors;
Conference_Titel :
Bioengineering Conference, 2005. Proceedings of the IEEE 31st Annual Northeast
Print_ISBN :
0-7803-9105-5
Electronic_ISBN :
0-7803-9106-3
DOI :
10.1109/NEBC.2005.1431969
