US 12,350,021 B2
Non-barometric determination of hemodynamic effects of cardiac arrhythmias using signals sensed by an implantable device
Jie Cheng, Houston, TX (US); and Dhanunjaya Lakkireddy, Houston, TX (US)
Assigned to Chelak Medical Solutions Inc, Houston, TX (US)
Filed by Chelak Medical Solutions Inc, Houston, TX (US)
Filed on Jan. 11, 2024, as Appl. No. 18/410,888.
Application 18/410,888 is a continuation of application No. 16/532,112, filed on Aug. 5, 2019, granted, now 11,903,683.
Claims priority of provisional application 62/714,217, filed on Aug. 3, 2018.
Prior Publication US 2024/0260842 A1, Aug. 8, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/00 (2006.01); A61B 5/02 (2006.01); A61B 5/0205 (2006.01); A61B 5/287 (2021.01); A61B 5/349 (2021.01); A61B 8/08 (2006.01); A61B 8/12 (2006.01); A61N 1/39 (2006.01); A61B 5/0215 (2006.01)
CPC A61B 5/02055 (2013.01) [A61B 5/0084 (2013.01); A61B 5/02028 (2013.01); A61B 5/287 (2021.01); A61B 5/349 (2021.01); A61B 5/686 (2013.01); A61B 5/6869 (2013.01); A61B 8/0883 (2013.01); A61B 8/12 (2013.01); A61N 1/3956 (2013.01); A61B 5/02154 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An implantable system for implanting in a subject for determining hemodynamic stability of the subject, comprising:
at least one optical fiber configured for placement in at least one of a heart of the subject or adjacent to a ventricle of the heart, wherein the at least one optical fiber comprises at least one fiber Bragg grating (FBG) and is configured to bend with contraction and relaxation of the heart;
at least one optical source configured to introduce an optical signal into the at least one optical fiber;
at least one receiver configured to receive a reflected portion of the optical signal via the at least one FBG of the at least one optical fiber; and
at least one processor configured to:
analyze a change in at least one parameter of the received reflected portion of the optical signal, wherein the change in the at least one parameter includes a Bragg wavelength shift, and wherein the Bragg wavelength shift is indicative of an amount of bending of the at least one optical fiber due to contraction and relaxation of the heart; and
determine the hemodynamic stability of the subject based on the Bragg wavelength shift.