Moharram Mohammed A, Wilson Luke C, Williams Michael Ja, Coffey Sean
Department of Medicine - HeartOtago, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand.
Int J Cardiol Hypertens. 2020 Apr 14;5:100030. doi: 10.1016/j.ijchy.2020.100030. eCollection 2020 Jun.
The availability of an accurate continuous cuffless blood pressure (BP) monitor would provide an alternative to both invasive continuous BP and 24-h intermittent cuff-based BP monitors. We investigated the accuracy of a cuffless beat to beat (BtB) device compared to both invasive BP (iBP) and brachial cuff BP (cBP) measurements.
Patients undergoing clinically indicated coronary angiography (CA) and/or percutaneous coronary intervention (PCI) were recruited. After calibration to an initial cBP reading, BP was measured simultaneously using a BtB device (SOMNOtouch NIBP), brachial artery iBP, and cBP at two time points.
The study was terminated early due to a significant bias. Recordings from 14 participants (11 males, mean age 68.4 years) were analysed. Readings from BtB BP were higher than iBP. The bias between BtB BP and iBP was 34.3 mmHg (95%CI: 27.0, 41.5) and 23.6 mmHg (95%CI: 16.8, 30.4) for SBP and DBP respectively. A similar bias was seen between BtB BP and cBP, but cBP and iBP were largely in agreement.
In patients undergoing CA/PCI, significant differences were detected between BtB BP and both invasively measured and cuff BP. The non-invasive BtB BP measurement device tested is not suitable for clinical or research use.
准确的连续无袖带血压监测仪的出现，将为有创连续血压监测和24小时间歇性袖带式血压监测仪提供一种替代方案。我们研究了一种无袖带逐搏（BtB）设备与有创血压（iBP）和肱动脉袖带血压（cBP）测量相比的准确性。
招募接受临床指征冠状动脉造影（CA）和/或经皮冠状动脉介入治疗（PCI）的患者。在根据初始cBP读数进行校准后，在两个时间点同时使用BtB设备（SOMNOtouch NIBP）、肱动脉iBP和cBP测量血压。
由于存在显著偏差，该研究提前终止。分析了14名参与者（11名男性，平均年龄68.4岁）的记录。BtB血压读数高于iBP。收缩压和舒张压在BtB血压与iBP之间的偏差分别为34.3 mmHg（95%CI：27.0，41.5）和23.6 mmHg（95%CI：16.8，30.4）。BtB血压与cBP之间也观察到类似偏差，但cBP和iBP基本一致。
在接受CA/PCI的患者中，BtB血压与有创测量血压和袖带血压之间均检测到显著差异。所测试的无创BtB血压测量设备不适合临床或研究使用。
