Department of Renal Medicine and Clinic of Hypertension, Aarhus University Hospital, Aarhus, Denmark.
Department of Cardiology and Clinic of Hypertension, Aarhus University Hospital, Aarhus, Denmark.
J Clin Hypertens (Greenwich). 2021 Jan;23(1):61-70. doi: 10.1111/jch.14135. Epub 2020 Dec 17.
Repeated cuff-based blood pressure (BP) measurements may cause discomfort resulting in stress and erroneous recording values. SOMNOtouch NIBP is an alternative cuff-less BP measurement device that calculates changes in BP based on changes in pulse transit time (PTT) and a software algorithm. The device is calibrated with a single upper arm cuff-based BP measurement. We tested the device against a validated 24-h ambulatory BP monitoring (ABPM) device using both the previous (SomBP1) and the current software algorithm (SomBP2). In this study, 51 patients (mean age ± SD 61.5 ± 13.0 years) with essential hypertension underwent simultaneous 24-h ABPM with the SOMNOtouch NIBP on the left arm and a standard cuff-based oscillometric device on the right arm (OscBP). We found that mean daytime systolic BP (SBP) with OscBP was 140.8 ± 19.7 compared to 148.0 ± 25.2 (P = .008) and 146.9 ± 26.0 mmHg (P = .034) for SomBP1 and SomBP2, respectively. Nighttime SBP with OscBP was 129.5 ± 21.1 compared with 146.1 ± 25.8 (P < .0001) and 141.1 ± 27.4 mmHg (P = .001) for SomBP1 and SomBP2, respectively. Ninety-five% limits of agreement between OscBP and SomBP1 were ± 36.6 mmHg for daytime and ± 42.6 mmHg for nighttime SBP, respectively. Agreements were not improved with SomBP2. For SBP, a nocturnal dipping pattern was found in 33% of the study patients when measured with OscBP but only in 2% and 20% with SomBP1 and -2, respectively. This study demonstrates that BP values obtained with the cuff-less PTT-based SOMNOtouch device should be interpreted with caution as these may differ substantially from what would be obtained from a validated cuff-based BP device.
基于袖带的血压（BP）重复测量可能会引起不适，导致压力和错误的记录值。SOMNOtouch NIBP 是一种替代无袖带的 BP 测量设备，它根据脉搏传导时间（PTT）的变化和软件算法来计算 BP 的变化。该设备通过单个上臂基于袖带的 BP 测量进行校准。我们使用经过验证的 24 小时动态血压监测（ABPM）设备，分别使用以前的（SomBP1）和当前的软件算法（SomBP2）对该设备进行了测试。在这项研究中，51 名原发性高血压患者（平均年龄±标准差 61.5±13.0 岁）在左侧手臂上同时进行 24 小时 SOMNOtouch NIBP 与右侧手臂上的标准基于袖带的振荡测量设备（OscBP）的 24 小时 ABPM。我们发现，OscBP 测量的白天收缩压（SBP）平均值为 140.8±19.7mmHg，而 SomBP1 和 SomBP2 分别为 148.0±25.2（P=0.008）和 146.9±26.0mmHg。OscBP 测量的夜间 SBP 平均值为 129.5±21.1mmHg，而 SomBP1 和 SomBP2 分别为 146.1±25.8（P<0.0001）和 141.1±27.4mmHg。OscBP 和 SomBP1 之间 95%的一致性界限分别为白天的±36.6mmHg 和夜间的±42.6mmHg。SomBP2 并不能提高一致性。对于 SBP，当使用 OscBP 测量时，研究中的 33%的患者出现夜间血压下降模式，但仅在 2%和 20%的患者中使用 SomBP1 和 -2 测量时出现夜间血压下降模式。本研究表明，基于无袖带 PTT 的 SOMNOtouch 设备获得的 BP 值应谨慎解释，因为这些值可能与从经过验证的基于袖带的 BP 设备获得的值有很大差异。
