AN ULTRASOUND BASED BIOMEDICAL SYSTEM FOR CARDIO PULMONARY MONITORING A SINGLE SENSOR FOR MULTIPLE INFORMATION

Abstract

Cardio-pulmonary monitoring is essential for early detection and management of critical health conditions. Conventional systems typically require multiple sensors to separately measure heart rate, respiratory rate, and related physiological parameters, increasing system complexity, cost, and patient discomfort. This paper presents an ultrasound-based biomedical system designed to extract multiple cardio-pulmonary parameters using a single non-invasive sensor. The proposed system utilizes a low-power ultrasonic transducer placed on the thoracic region to capture chest wall micro-movements associated with cardiac activity and respiration. Advanced signal processing techniques, including adaptive filtering, demodulation, and time–frequency analysis, are implemented to separate and quantify heart rate, respiratory rate, and breathing patterns from the composite signal.

The system architecture integrates a compact analog front-end, microcontroller-based data acquisition, and real-time processing algorithms to ensure accurate and continuous monitoring. Experimental validation conducted on healthy subjects demonstrates high correlation with standard reference devices such as ECG and respiratory belts. The proposed solution offers advantages in portability, cost-effectiveness, reduced sensor
count, and improved patient comfort. This single-sensor ultrasound approach provides a promising platform for wearable, home-based, and critical care cardio-pulmonary monitoring

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