Method and apparatus for the non-invasive measurement of pulse transit times (PTT)

US9999357B2 · kind B2 · utility

Assignee

• CSEM CENTRE SUISSE D'ELECTRONIQUE ET DE MICROTECHNIQUE SA—RECHERCHE ET DÉVELOPPEMENT · CH

Inventors

• Josep Sola i Caros · Corcelles-Cormondrèche, CH
• Josef X. Brunner · Chur, CH
• Damien Farrario · Vevey, CH
• Andrew Adler · Calabasas, US

Key dates

• Filing date: Jan 11, 2013
• Grant date: Jun 19, 2018
• Expiry date: Aug 11, 2034

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B5/029
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method and apparatus for measuring a pulse transit time (PTT) value of a subject, comprise measuring a first arterial pressure pulse arrival time (PAT) and measuring a second PAT value; calculating a PTT value from the difference between the first PAT value and the second PAT value; processing a sequence of electrical impedance tomography (EIT) images to identify at least one region of interest (ROI); and estimating at least one of the first and second PAT value from the variation of impedance value determined from the at least one ROI. The method allows for the non-invasive and continuous measurement of the PTT value and arterial blood pressures.