Goswami Dharitri, Chaudhuri Koel, Mukherjee Jayanta
School of Medical Science and Technology, Indian Institute of Technology, Kharagpur 721302, India.
Cardiovasc Eng. 2010 Sep;10(3):109-17. doi: 10.1007/s10558-010-9098-8.
Analysis of digital volume pulse (DVP) signal measured by photoplethysmograph (PPG) technique is a low cost non-invasive method of obtaining vital information related to arterial conditions. In this paper, we present a new two-pulse synthesis (TPS) model for deriving arterial parameters, useful for noninvasive assessment of human vascular health. The model is based on the use of Rayleigh function. Relevance of the proposed model is established by applying it on a sample set of 113 PPG signals, obtained form healthy and treated hypertensive subjects. The TPS model compares well with the conventional methods in determining parameters such as pulse transit time or foot-to-foot delay (D), reflection index (RI), stiffness index (SI) and pulse wave velocity (PWV). A new parameter, viz. differential pulse spread (DPS) has also been introduced for DVP signals using the model. The differential pulse spread provides a new dimension to estimate the process of arterial degeneration.
通过光电容积脉搏波描记法（PPG）技术测量数字容积脉搏波（DVP）信号进行分析，是一种获取与动脉状况相关生命信息的低成本非侵入性方法。在本文中，我们提出了一种用于推导动脉参数的新双脉冲合成（TPS）模型，该模型有助于对人体血管健康进行非侵入性评估。该模型基于瑞利函数的应用。通过将其应用于从健康和经治疗的高血压受试者获得的113个PPG信号样本集，确立了所提出模型的相关性。在确定诸如脉搏传播时间或峰峰延迟（D）、反射指数（RI）、硬度指数（SI）和脉搏波速度（PWV）等参数方面，TPS模型与传统方法相比具有优势。还使用该模型为DVP信号引入了一个新参数，即差分脉冲展宽（DPS）。差分脉冲展宽为估计动脉退变过程提供了一个新维度。
