目的:目的是比较散斑体积描记术(SPG)和光电体积描记术(PPG)与非侵入性手指动脉压(fiAP)在脉搏波形态(PWM)和脉搏到达时间(PAT)方面的差异。
方法:健康志愿者(n=8)连接到非侵入性血压(NIBP)监测器,该监测器通过临床传输模式SpO2指夹提供fiAP脉搏波和PPG。Biopac记录3导联心电图。放置在25cm距离处的相机记录了由639nm的激光二极管照射的手指的视频流(100fps)。胸带(Polar)监测呼吸。在自发呼吸和节奏呼吸期间同时记录所有信号。
方法:在Matlab中进行后处理以获得SPG并分析SPG,PPG和fiAP意味着PWM上的绝对偏差(MAD),加上PAT调制。
结果:在2599次节拍中,PPG的平均fiAPMAD为0.17(0-1),SPG为0.09(0-1)。来自ECG-fiAP的PAT相关如下:对于ECG-SPG为0.65,对于ECG-PPG为0.67。
结论:与临床NIBP监测fiAP参考相比,来自实验相机衍生的非接触式反射模式SPG设置的PWM与同时记录的临床传输模式手指夹的FiAP相比明显更好。对于PAT值,与ECG-fiAP相比,ECG-SPG和ECG-PPG之间没有显着差异。
OBJECTIVE: The goal was to compare Speckle plethysmography (SPG) and Photoplethysmography (PPG) with non-invasive finger Arterial Pressure (fiAP) regarding Pulse Wave Morphology (PWM) and Pulse Arrival Time (PAT).
METHODS: Healthy volunteers (n = 8) were connected to a Non-Invasive Blood Pressure (NIBP) monitor providing fiAP pulse wave and PPG from a clinical transmission-mode SpO2 finger clip. Biopac recorded 3-lead ECG. A camera placed at a 25 cm distance recorded a video stream (100 fps) of a finger illuminated by a laser diode at 639 nm. A chest belt (Polar) monitored respiration. All signals were recorded simultaneously during episodes of spontaneous breathing and paced breathing.
METHODS: Post-processing was performed in Matlab to obtain SPG and analyze the SPG, PPG and fiAP mean absolute deviations (MADs) on PWM, plus PAT modulation.
RESULTS: Across 2599 beats, the average fiAP MAD with PPG was 0.17 (0-1) and with SPG 0.09 (0-1). PAT derived from ECG-fiAP correlated as follows: 0.65 for ECG-SPG and 0.67 for ECG-PPG.
CONCLUSIONS: Compared to the clinical NIBP monitor fiAP reference, PWM from an experimental camera-derived non-contact reflective-mode SPG setup resembled fiAP significantly better than PPG from a simultaneously recorded clinical transmission-mode finger clip. For PAT values, no significant difference was found between ECG-SPG and ECG-PPG compared to ECG-fiAP.