Abstract
Our aim is to develop a blood pressure (BP) measurement technology that could be integrated into a finger-worn pulse oximeter, eliminating the need for a brachial cuff. We present a miniature cuffless tonometric finger probe system that uses the oscillometric method to measure BP. Our approach uses a motorized press that is used to apply pressure to the fingertip to measure BP. We verified the functionality of the device in a clinical trial (n= 43) resulting in systolic and diastolic pressures ((mean± SD) mmHg) of (-3.5± 8.4) mmHg and (-4.0± 4.4) mmHg, respectively. Comparison was made with manual auscultation (n= 26) and automated cuff oscillometry (n= 18). In addition to BP, we demonstrated the ability of the device to assess arterial stiffness (n= 18) and detect atrial fibrillation (n= 6). We were able to introduce a sufficiently small device that could be used for convenient ambulatory measurements with minimal discomfort.
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