(G-244) Noninvasive Blood Pressure Measurements using a Korotkoff Threshold Detection Algorithm in Both Inflationary and Deflationary Phases

Introduction:: Accurate blood pressure (BP) measurements are crucial in preventing and treating many cardiovascular diseases. Noninvasive BP measurement methods are preferred, as they are less invasive and less risky than invasive methods. The auscultatory method is one of the most commonly used noninvasive techniques and involves using a sphygmomanometer and a stethoscope to detect Korotkoff sounds while inflating and deflating an arm cuff. However, the auscultatory method has limitations, including the need for highly trained technicians and uncertainty in its BP predictions.


Materials and Methods:: In this study, we investigated the use of a software algorithm to obtain Korotkoff sounds during noninvasive BP measurements. The algorithm uses a contact microphone and an arm cuff to detect Korotkoff sounds in both the inflationary and deflationary phases. The study involved a group of 20 individuals with diverse health conditions, and the results were analyzed.


Results, Conclusions, and Discussions:: Our research revealed the successful detection of Korotkoff sounds in both the inflationary and deflationary phases through the use of a contact microphone and an easily accessible arm cuff. The software algorithm employed multiple filtering methods to reduce the impact of inflationary noise. The study also presented the systolic and diastolic values of 20 participants with varying health conditions. Overall, the findings demonstrate the effectiveness of the software algorithm in accurately detecting Korotkoff sounds, which can aid in the assessment of blood pressure. The use of a contact microphone and readily available arm cuff make this technology accessible and cost-effective.


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