Medical Outpatient Department and Hypertension Clinic, ESH Hypertension Centre of Excellence.
Faculty of Medicine, University Basel, Basel, Switzerland.
J Hypertens. 2024 Apr 1;42(4):662-671. doi: 10.1097/HJH.0000000000003667. Epub 2024 Jan 23.
There is an increasing number of cuffless blood pressure (BP) measurement (BPM) devices. Despite promising results when comparing single measurements, the ability of these devices to track changes in BP levels over 24 h related to an initial calibration BP (CalibBP) is unknown. Our aim was to analyse this ability in a cuffless device using pulse transit time.
We prospectively enrolled 166 participants for simultaneously performed cuffless (Somnotouch-NIBP) and cuff-based (Spacelabs 90217A/IEM Mobil-O-graph) 24 h BPM. As CalibBP for the cuffless device, first cuff-based BP was used. As surrogate for changes in BP levels after the CalibBP, we used the difference between the CalibBP and mean 24 h, awake and asleep BP measured by the two devices. In addition, we analysed the relationship between the difference of the CalibBP and the cuff-based BPM versus the difference between the cuff-based and the cuffless BPM devices.
Mean(SD) difference between the CalibBP and mean 24hBP by the cuff-based or cuffless BP device were 7.4 (13.2) versus 1.8 (8.3) mmHg for systolic ( P < 0.0001) and 6.6 (6.8) versus 1.6 (5.8) mmHg for diastolic ( P < 0.0001). A near linear relationship was seen among the difference between the CalibBP and the cuff-based BPM values and the difference between the cuff-based and cuffless BPM device.
Our data indicate a lower ability of the cuffless BPM device to track changes of BP levels after CalibBP. In addition, cuffless device accuracy was associated with the changes in BP levels after the initial CalibBP - the larger the BP level change, the larger the difference between the devices.
https://www.clinicaltrials.gov ; Unique identifier: NCT03054688; NCT03975582.
无袖带血压（BP）测量（BPM）设备的数量正在增加。尽管在比较单次测量时结果很有前景，但这些设备在初始校准 BP（CalibBP）相关的 24 小时内跟踪 BP 水平变化的能力尚不清楚。我们的目的是使用脉搏传导时间分析无袖带设备的这种能力。
我们前瞻性地招募了 166 名参与者，同时进行无袖带（Somnotouch-NIBP）和基于袖带的（Spacelabs 90217A/IEM Mobil-O-graph）24 小时 BPM。作为无袖带设备的 CalibBP，我们首先使用基于袖带的 BP。作为 CalibBP 后 BP 水平变化的替代指标，我们使用 CalibBP 与两种设备测量的 24 小时、清醒和睡眠时平均 BP 之间的差值。此外，我们还分析了 CalibBP 与基于袖带 BPM 的差值与基于袖带和无袖带 BPM 设备的差值之间的关系。
基于袖带或无袖带 BP 设备的 CalibBP 与 24 小时平均 BP 的平均差值（SD）分别为收缩压 7.4（13.2）mmHg 与 1.8（8.3）mmHg（ P ＜0.0001）和舒张压 6.6（6.8）mmHg 与 1.6（5.8）mmHg（ P ＜0.0001）。CalibBP 与基于袖带 BPM 值之间的差值与基于袖带和无袖带 BPM 设备之间的差值之间存在近似线性关系。
我们的数据表明，无袖带 BPM 设备在 CalibBP 后跟踪 BP 水平变化的能力较低。此外，无袖带设备的准确性与初始 CalibBP 后的 BP 水平变化相关- BP 水平变化越大，设备之间的差异越大。
https://www.clinicaltrials.gov；唯一标识符：NCT03054688；NCT03975582。
