Non-invasive method and system for estimating blood pressure from photoplethysmogram using statistical post-processing

US11298084B2 · kind B2 · utility

Assignee

• Tata Consultancy Services Limited · IN

Inventors

• Shreyasi Datta · Sherghati, IN
• Anirban Dutta Choudhury · Sherghati, IN
• Arijit Chowdhury · Sherghati, IN
• Rohan Banerjee · Sherghati, IN
• Tanushree Banerjee · Sherghati, IN
• Arpan Pal · Sherghati, IN
• Kayapanda Mandana · Sherghati, IN

Key dates

• Filing date: Feb 20, 2018
• Grant date: Apr 12, 2022
• Expiry date: Jan 19, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G16H50/70
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A system and method for estimating blood pressure (BP) using photoplethysmogram (PPG) has been explained. The PPG is captured from a PPG sensor (102). For preparing training model, a pulse oximeter is used for capturing PPG. For testing, a smartphone camera is used for capturing the PPG signal. A plurality of features are extracted from the preprocessed PPG signal. A BP distribution is then generated using the plurality of features and the training model. The BP distribution is part of a set of BP distributions generated from different subjects. Finally, a post-processing methodology have been used to reject inconsistent data out of the set of BP distributions and BP value is estimated only for the remaining BP distributions and a statistical average is provided as the blood pressure estimate.