Cuffless Blood Pressure Measurement via Pulse Transit Time Analysis and Arduino

Overview

This project addresses the accessibility gap in hypertension monitoring by developing a low-cost, cuffless blood pressure device. With 48.1% of U.S. adults affected by high blood pressure, many cannot afford standard monitors ($50-$100) or find traditional cuff-based systems uncomfortable. We designed and attempted to build an Arduino-based alternative utilizing Pulse Transit Time (PTT) methodology at a $25-$35 price point. Our prototype integrates an Arduino Uno R3 microcontroller with pulse sensors in a 3D-printed housing, eliminating the need for uncomfortable cuff inflation while maintaining clinical accuracy. Testing against commercial monitors demonstrated relatively accurate measurement precision with an average systolic blood pressure (SBP) %-error on calibrated subjects of 7.44% and average diastolic blood pressure (DBP) %-error on calibrated subjects of 8.03%. for SBP and 8.88% error for DBP. Additionally, on non-calibrated subjects, we achieved an SBP average %-error of 8.09% and a DBP %-error of 9.75%. The total cost of our device came down to $34.34. Overall, this innovation demonstrates how engineering solutions can address healthcare accessibility challenges while potentially improving hypertension management for underserved populations.

Competition history

• AJAS 2026 Category not listed

Related projects

Closest projects by meaning, across every fair and year in the corpus.

Browse more like this

• All Biomedical Engineering projects
• AJAS Biomedical Engineering projects
• Every AJAS 2026 project