The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 2025
Filed:
Aug. 07, 2020
Apple Inc., Cupertino, CA (US);
Erno H. Klaassen, Cupertino, CA (US);
Wren Nancy Dougherty, San Francisco, CA (US);
Richard C. Kimoto, Cupertino, CA (US);
Ravi K. Narasimhan, Sunnyvale, CA (US);
Thomas J. Sullivan, Cupertino, CA (US);
Stephen J. Waydo, Cupertino, CA (US);
Todd K. Whitehurst, Cupertino, CA (US);
Santiago Quijano, Cupertino, CA (US);
Derek Park-Shing Young, Cupertino, CA (US);
Zijing Zeng, Cupertino, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Methods and devices for obtaining a blood pressure measurement of a subject measure a transit time of a blood pulse of the subject. A method includes sensing, with a pulse ejection sensor of a wrist-worn device, ejection of blood from the left ventricle. Arrival of a resulting blood pressure pulse at the wrist is sensed via a pulse arrival sensor of the wrist-worn device. A transit time of the blood pressure pulse from the left ventricle to the wrist is determined. A relative blood pressure value of the subject is determined based on the transit time. A reference absolute blood pressure value associated with the relative blood pressure value is received. An absolute blood pressure value for the relative blood pressure value is determined based on the reference absolute blood pressure value and the relative blood pressure value.