Smartphone-Based Blood Pressure Measurement Using Transdermal Optical Imaging Technology
Smartphone-Based Blood Pressure Measurement Using Transdermal Optical Imaging Technology
复制标题
使用透皮光学成像技术进行基于智能手机的血压测量
DOI：
10.1161/circimaging.119.008857
复制
发表时间：
2019-08-01
影响因子：
7.5
通讯作者：
Feng, Zhong-Ping
中科院分区：
文献类型：
--
作者：
Luo, Hong;Yang, Deye;Feng, Zhong-Ping
背景：袖带血压测量缺乏舒适性和便利性。在这里，我们研究了是否可以使用一种称为透皮光学成像的新型智能手机技术以非接触方式确定血压。该技术处理智能手机摄像头捕获的视频中无法察觉的面部血流变化，并使用先进的机器学习来确定捕获信号中的血压。方法：我们纳入了1328名血压正常的成年人。我们使用了一种先进的机器学习算法来创建计算模型，这些模型可以从面部血流数据中预测参考收缩压、舒张压和脉压。我们使用70%的数据集来训练这些模型，使用15%的数据集来测试它们。剩余15%的样本用于验证模型性能。结果如下：我们发现，我们的模型预测血压的测量偏差+/- SD分别为收缩压0.39 +/- 7.30 mm Hg，舒张压-0.20 +/- 6.00 mm Hg，脉压0.52 +/- 6.42 mm Hg。结论：我们的结果在正常血压的成人下降5 +/- 8毫米汞柱的参考测量。未来的工作将确定这些模型是否符合临床接受的准确度阈值5 +/- 8毫米汞柱时，根据国际准确度标准进行测试的全范围的血压。
Background: Cuff-based blood pressure measurement lacks comfort and convenience. Here, we examined whether blood pressure can be determined in a contactless manner using a novel smartphone-based technology called transdermal optical imaging. This technology processes imperceptible facial blood flow changes from videos captured with a smartphone camera and uses advanced machine learning to determine blood pressure from the captured signal. Methods: We enrolled 1328 normotensive adults in our study. We used an advanced machine learning algorithm to create computational models that predict reference systolic, diastolic, and pulse pressure from facial blood flow data. We used 70% of our data set to train these models and 15% of our data set to test them. The remaining 15% of the sample was used to validate model performance. Results: We found that our models predicted blood pressure with a measurement bias +/- SD of 0.39 +/- 7.30 mm Hg for systolic pressure, -0.20 +/- 6.00 mm Hg for diastolic pressure, and 0.52 +/- 6.42 mm Hg for pulse pressure, respectively. Conclusions: Our results in normotensive adults fall within 5 +/- 8 mm Hg of reference measurements. Future work will determine whether these models meet the clinically accepted accuracy threshold of 5 +/- 8 mm Hg when tested on a full range of blood pressures according to international accuracy standards.