Invention Grant
- Patent Title: Non-invasive method and system for estimating blood pressure from photoplethysmogram using statistical post-processing
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Application No.: US15900774Application Date: 2018-02-20
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Publication No.: US11298084B2Publication Date: 2022-04-12
- Inventor: Shreyasi Datta , Anirban Dutta Choudhury , Arijit Chowdhury , Rohan Banerjee , Tanushree Banerjee , Arpan Pal , Kayapanda Mandana
- Applicant: Tata Consultancy Services Limited
- Applicant Address: IN Mumbai
- Assignee: Tata Consultancy Services Limited
- Current Assignee: Tata Consultancy Services Limited
- Current Assignee Address: IN Mumbai
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner LLP
- Priority: IN201721031600 20170906
- Main IPC: A61B5/00
- IPC: A61B5/00 ; A61B5/021 ; A61B5/024 ; A61B5/1455 ; G16H50/20 ; G16H50/70 ; G06K9/00 ; G16H50/30

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.
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