Ultra-low-cost mechanical smartphone attachment for no-calibration blood pressure measurement.
Ultra-low-cost mechanical smartphone attachment for no-calibration blood pressure measurement.
复制标题
DOI：
10.1038/s41598-023-34431-1
复制
发表时间：
2023-05-29
影响因子：
4.6
通讯作者：
中科院分区：
文献类型：
--
作者：
我们提出了一种超低成本的家用血压监测仪，它利用带有弹簧加载机制的塑料夹，使带有闪光灯LED和摄像头的智能手机能够测量血压。我们的系统，叫做BPClip，是基于测量指尖振荡测量血压的科学前提。为了让智能手机测量施加在数字动脉上的压力，当用户加大力度按下夹子时，一个可移动的针孔投影会向摄像头靠近。当用户以更大的力按压设备时，弹簧加载的机构就会压缩。针孔的大小因此编码了施加在手指上的压力。同时，针孔投影的亮度波动与动脉脉冲振幅相关。通过内置摄像头捕捉针孔投影的大小和亮度，智能手机只需一个低成本的塑料夹和一个应用程序就可以测量用户的血压。与之前的方法不同，与基于脉搏传递时间和脉搏波分析的血压监测解决方案相比，该系统不需要测量血压袖带来进行用户特定的校准。我们的解决方案也不需要专门的智能手机型号和定制传感器。我们的早期可行性发现表明，在一项有N = 29名参与者，收缩压范围为88 - 157 mmHg的验证研究中，BPClip系统的收缩压和舒张压的平均绝对误差分别为8.72和5.49。在估计成本预测研究中，我们证明了在1000个单位的小批量生产中，材料成本估计为0.80美元，这表明在全面生产中，我们提出的BPClip概念可以以非常低的成本生产，与现有的基于袖带的家庭血压管理监测仪相比。
We propose an ultra-low-cost at-home blood pressure monitor that leverages a plastic clip with a spring-loaded mechanism to enable a smartphone with a flash LED and camera to measure blood pressure. Our system, called BPClip, is based on the scientific premise of measuring oscillometry at the fingertip to measure blood pressure. To enable a smartphone to measure the pressure applied to the digital artery, a moveable pinhole projection moves closer to the camera as the user presses down on the clip with increased force. As a user presses on the device with increased force, the spring-loaded mechanism compresses. The size of the pinhole thus encodes the pressure applied to the finger. In conjunction, the brightness fluctuation of the pinhole projection correlates to the arterial pulse amplitude. By capturing the size and brightness of the pinhole projection with the built-in camera, the smartphone can measure a user’s blood pressure with only a low-cost, plastic clip and an app. Unlike prior approaches, this system does not require a blood pressure cuff measurement for a user-specific calibration compared to pulse transit time and pulse wave analysis based blood pressure monitoring solutions. Our solution also does not require specialized smartphone models with custom sensors. Our early feasibility finding demonstrates that in a validation study with N = 29 participants with systolic blood pressures ranging from 88 to 157 mmHg, the BPClip system can achieve a mean absolute error of 8.72 and 5.49 for systolic and diastolic blood pressure, respectively. In an estimated cost projection study, we demonstrate that in small-batch manufacturing of 1000 units, the material cost is an estimated $0.80, suggesting that at full-scale production, our proposed BPClip concept can be produced at very low cost compared to existing cuff-based monitors for at-home blood pressure management.
登录
查看更多内容
影响因子：
37.8
作者：
Muntner P;Carey RM;Gidding S;Jones DW;Taler SJ;Wright JT Jr;Whelton PK
通讯作者：
Whelton PK
用于估计脉搏传播时间的智能手机应用程序
DOI：
10.3390/s151027303
发表时间：
2015-10-27
期刊：
Sensors (Basel, Switzerland)
影响因子：
--
作者：
Liu H;Ivanov K;Wang Y;Wang L
通讯作者：
Wang L
DOI：
10.1111/j.1524-6175.2006.05112.x
发表时间：
2006-05-01
期刊：
Journal of clinical hypertension (Greenwich, Conn.)
影响因子：
--
作者：
Ferdinand, Keith C
通讯作者：
Ferdinand, Keith C
影响因子：
2.2
作者：
Joosten, Alexandre;Jacobs, Alexandra;Saugel, Bernd
通讯作者：
Saugel, Bernd
DOI：
10.1111/j.1467-9868.2011.00771.x
发表时间：
2011-01-01
影响因子：
5.8
作者：
Tibshirani, Robert
通讯作者：
Tibshirani, Robert