Results from two independent clinical validation studies for measuring hemodynamics at the patient's bedside using a compact finger probe are reported. Technology comprises a barometric pressure sensor, and in one implementation, additionally, an optical sensor for photoplethysmography (PPG) is developed, which can be used to measure blood pressure and analyze rhythm, including the continuous detection of atrial fibrillation. The capabilities of the technology are shown in several form factors, including a miniaturized version resembling a common pulse oximeter to which the technology could be integrated in. Several main results are presented: i) the miniature finger probe meets the accuracy requirements of non‐invasive blood pressure instrument validation standard, ii) atrial fibrillation can be detected during the blood pressure measurement and in a continuous recording, iii) a unique comparison between optical and pressure sensing mechanisms is provided, which shows that the origin of both modalities can be explained using a pressure‐volume model and that recordings are close to identical between the sensors. The benefits and limitations of both modalities in hemodynamic monitoring are further discussed.

中文翻译：

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带压力和光学传感器的血流动力学床边监测仪器：验证和模式比较

报告了两项使用紧凑型手指探针在患者床边测量血流动力学的独立临床验证研究的结果。技术包括气压传感器，并且在一种实现中，此外还开发了一种用于光电体积描记法（PPG）的光学传感器，可用于测量血压和分析节律，包括连续检测心房颤动。该技术的功能以多种外形尺寸展示，包括类似于普通脉搏血氧计的小型化版本，该技术可以集成到其中。提出了几个主要结果：i）微型手指探头满足非侵入性的精度要求血压仪器验证标准，ii) 在血压测量和连续记录过程中可以检测到心房颤动，iii) 提供了光学和压力传感机制之间的独特比较，这表明两种模式的起源可以用以下方式解释：压力-体积模型，并且传感器之间的记录几乎相同。进一步讨论了两种血流动力学监测方式的优点和局限性。