Key result
Local skin surface temperature changes alter BP, PPG, and TPR without affecting HR, SV, or CO.
Why the study?
Does changing skin surface temperature affect PPG, blood pressure, and cardiovascular parameters in healthy subjects?
Does changing skin surface temperature affect PPG, blood pressure, and cardiovascular parameters in healthy subjects?
Skin surface temperature significantly affects peripheral cardiovascular measurements like finger BP and PPG components, indicating temperature must be controlled for reliable evaluations.
Answers are grounded in this paper and cite their sources.
May necessitate temperature standardization in Finometer/PPG assessments; leaves open effects in patients or with other devices.
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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Jeong et al. (2014) studied this question. Local skin surface temperature changes significantly affected Finometer blood pressure, PPG components, and total peripheral resistance, but did not influence HR, SV, or CO.
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