IP Library › Granted Patent US 12,241,800
Granted Patent B2
US 12,241,800 · App. 18/516,813 · Granted Mar 4, 2025

Miniaturization of fiber Bragg grating interrogation for integration into implantable devices

Inventors: Jie Cheng (Bellaire, TX); Siu Chun M. Ho (Pearland, TX); Dhanunjaya R. Lakkireddy (Leawood, KS); Chen Chen (New Haven, CT)
Assignee: Chelak Medical Solutions Inc.
G01L1/246G01D5/268
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Quick Facts
Patent No.
US 12,241,800
App. No.
18/516,813
Granted
Mar 4, 2025
Kind
B2
Abstract

A miniaturized fiber Bragg grating (FBG) interrogation system may comprise a light source, a FBG sensor, and a photodetector. The FBG sensor may be configured to receive an optical signal from the light source, interact with a transmitted spectrum of the light source over a discriminating spectral domain, and generate a reflected optical signal representative of a change in a physical signal sensed by the FBG sensor. Additionally, the system may include a power management unit configured to reduce power consumption in order to prolong the lifespan of the system.

Claims (30)

1. A power management unit for an implantable medical device comprising an optical sensor system that is configured to measure one or more physical signals, the power management unit comprising:

at least one of a switch or a power regulation circuit to:

transition the optical sensor system from an operational state to a dormant state, or

transition the optical sensor system from the dormant state to the operational state; and

a processor coupled to the at least one of the switch or the power regulation circuit, the processor configured to operate the optical sensor system in at least one of:

a continuous mode,

an event-triggered mode,

an event-gated mode,

a pulse width modulation mode, or

an adaptive power mode.

2. The power management unit of claim 1 , wherein in the event-triggered mode, the processor is configured to automatically transition the optical sensor system from the dormant state to the operational state in response to a triggering physical event.

3. The power management unit of claim 2 , wherein the triggering physical event comprises one or more of arrhythmia, heart failure, or ischemia.

4. The power management unit of claim 1 , wherein in the event-triggered mode, the processor is configured to automatically transition the optical sensor system from the dormant state to the operational state at predetermined time intervals.

5. The power management unit of claim 1 , wherein in the event-triggered mode, the processor is configured to automatically transition the optical sensor system from the dormant state to the operational state in response to a request from a user.

6. The power management unit of claim 1 , wherein in the event-gated mode, the processor is configured to automatically transition the optical sensor system from the dormant state to the operational state and from the operational state to the dormant state based on a recurring physical event.

7. The power management unit of claim 6 , wherein the recurring physical event is a respiratory cycle or a cardiac cycle.

8. The power management unit of claim 7 , wherein the processor is configured to transition the optical sensor system from the dormant state to the operational state at one or more of:

an end-systole of a cardiac cycle,

an end-diastole of a cardiac cycle,

an end-inspiration of a respiratory cycle, or

an end-expiration of a respiratory cycle.

9. The power management unit of claim 8 , wherein after transitioning the optical sensor system to the operational state, the processor is configured to maintain the optical sensor system in the operational state for a preset amount of time.

10. The power management unit of claim 8 , wherein after transitioning the optical sensor system to the operational state, the processor is configured to maintain the optical sensor system in the operational state for a dynamically determined amount of time.

11. The power management unit of claim 1 , wherein in the pulse width modulation mode, the processor is configured to automatically transition the optical sensor system from the dormant state to the operational state and from the operational state to the dormant state based on a duty cycle of the power delivered to the optical sensor system.

12. The power management unit of claim 1 , wherein in the adaptive power mode, the processor is configured to adaptively increase or decrease a power transmitted to the optical sensor system based on an amplitude of the one or more physical signals measured by the optical sensor system.

13. The power management unit of claim 1 , wherein the processor is configured to operate the optical sensor system in at least two of the continuous mode, the event-triggered mode, the event-gated mode, the pulse width modulation mode, or the adaptive power mode simultaneously.

14. The power management unit of claim 1 , wherein the processor is configured to operate the optical sensor system in the continuous mode and the event-triggered mode sequentially.

15. The power management unit of claim 1 , wherein the optical sensor system includes a Fiber Bragg Gratings sensor.

16. The power management unit of claim 1 , wherein the optical sensor system includes a Fiber Bragg Gratings interrogation system.

17. The implantable medical device comprising the power management unit as recited in claim 1 .

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 22, 2026
From: CHELAK MEDICAL SOLUTIONS INC.
To: CARDIOPTIX, INC.
Reel/Frame 074441/0190 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 14, 2025
From: CHENG, JIE; HO, SIU CHUN M.; LAKKIREDDY, DHANUNJAYA R.; CHEN, CHEN
To: CHELAK MEDICAL SOLUTIONS INC.
Reel/Frame 069851/0910 →
Continuity (3)
Continuation 18141957 · May 1, 2023
Provisional Application 63336909 · Apr 29, 2022
Related Publication 20240272023A1 · Aug 15, 2024
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