Best Buy has been granted a patent for a monitoring apparatus designed to measure pulse transit time and estimate blood pressure parameters. The device features an upper arm unit with motion sensors and a photoplethysmograph, enabling it to process signals related to cardiac activity and blood volume. GlobalData’s report on Best Buy gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Best Buy, was a key innovation area identified from patents. Best Buy's grant share as of July 2024 was 59%. Grant share is based on the ratio of number of grants to total number of patents.
Monitoring pulse transit time and blood pressure parameters
The granted patent US12036007B2 describes a monitoring apparatus designed to assess pulse transit time (PTT) parameters in subjects, utilizing an upper arm unit that can be worn comfortably. This unit is equipped with at least one motion sensor, such as a gyroscope or accelerometer, which detects motion associated with cardiac activity, and a photoplethysmograph (PPG) that measures blood volume changes in the upper arm. The apparatus processes signals from both the motion sensor and the PPG to estimate the PTT parameter by cross-calculating these signals. This involves time-shifting the PPG signal and calculating the integral of the product of the motion signal and the time-shifted PPG signal over various time shifts.
Additionally, the patent outlines methods for monitoring PTT and related blood pressure parameters. The processing of the motion and PPG signals can yield estimates of the rate of change of the PTT and blood pressure parameters. The methods include comparing waveforms derived from both signals, using the PPG as a baseline for analysis, and extracting cardiac cycle waveforms from the motion signal. The apparatus may also feature a wireless transmitter for data transmission to other devices, enhancing its utility in health monitoring applications. Overall, the patent presents a comprehensive approach to non-invasively monitor cardiovascular parameters through advanced signal processing techniques.
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