期刊
JOURNAL OF HEALTHCARE ENGINEERING
卷 5, 期 4, 页码 429-438出版社
HINDAWI LTD
DOI: 10.1260/2040-2295.5.4.429
关键词
Photoplethysmography; local cooling and heating; skin surface temperature; cardiovascular status; vasoconstriction; vasodilation
资金
- Bio-Meditech Regional Innovation Center at Eulji University, under the Regional Innovation Center Program of the Ministry Of Trade, Industry and Energy, R. O. Korea [2013-02-01]
Photoplethysmograph (PPG) has been widely used to investigate various cardiovascular conditions. Previous studies demonstrated effects of temperature of the measurement environment; however, an integrated evaluation has not been established in environments with gradual air temperature variation. The purpose of this study is to investigate variations and relationships of blood pressure (BP), PPG and cardiovascular parameters such as heart rate (HR), stroke volume (SV), cardiac output (CO) and total peripheral resistance (TPR), by changing skin surface temperature (SST). Local mild cooling and heating was conducted on 16 healthy subjects. The results showed that local SST changes affected Finometer blood pressures (Finger BP), PPG components and TPR, but not the oscillometric blood pressure (Central BP), HR, SV and CO, and indicated that temperature must be maintained and monitored to reliably evaluate cardiovascular conditions in temperature-varying environments.
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