Pacesetter, Inc.

Xi Lin Chen

Shiloh Sison

Xiyao Xin

Xiaoyi Min

Shi Feng

Xin Huang

Yash Vardhan Tiwari

An implantable medical device (IMD) is provided and includes sensing circuitry coupled to electrodes. The sensing circuitry is configured to sense electrical biological signals indicative of a non-physiologic condition of interest experienced by a patient during a magnetic resonance imaging (MRI) procedure, and in the presence of an MRI scanning sequence, the MRI scanning sequence includes at least one of radio frequency (RF) or gradient fields that are in an active state for active field intervals. The device includes memory to store the biological signals and to store program instructions and includes a processor that, when executing the program instructions, is configured to: determine start times for the active field intervals when the at least one of RF or gradient fields switch to the active state and manage generation of MRI-induced-noise corrected (MRI-INC) biological signals, based on the start times for the active field intervals, by at least one of: 1) applying a blanking interval to the sensing circuitry to blank a sensing operation during at least portions of the active field interval or 2) modifying segments of the biological signal sensed during at least the portions of the active field interval, and 3) comparing biologic signal sensed during at least the portions of the active field interval to a template. The device analyzes the biological signals for an indication that the patient is experiencing the non-physiologic condition.

Methods and devices related to operation of an implantable medical device during magnetic resonance imaging

Certain embodiments described herein related to methods, devices, and systems that provide improved communications between first and second IMDs remotely located relative to one another and capable of communicating using both conductive communication and RF communication. Such a method can include the first IMD using conductive communication to transmit message(s) intended for the second IMD, without using RF communication, during a first period of time that a first trigger event is not detected. The method can also include the first IMD detecting the first trigger event, and in response thereto, the first IMD using RF communication to transmit message(s) intended for the second IMD during a second period of time. Thereafter, in response to first IMD detecting a second trigger event, the first IMD uses conductive communication to transmit one or more messages intended for the second IMD, without using RF communication, during a third period of time.

Implant to implant communication for use with implantable medical devices

A system for validating safety of a medical device in a presence of a magnetic resonance imaging (MRI) field is provided. The system includes a first electric field generating device configured to form first electric field and configured to receive a medical device at least partially within the first electric field, and a second electric field generating device configured to form a second electric field in proximity to the first electric field and configured to receive the medical device at least partially within the second electric field. One or more processors are configured to execute program instructions to calculate predicted parameter values of the medical device based on a transfer function, the transfer function defined to predict a safety characteristic of the medical device when in the presence of an MRI field, obtain measured parameter values from the medical device, the measured parameter values indicative of the safety characteristic of the medical device when exposed to the first and second electric fields, and compare the measured parameter values to the predicted parameter values in connection with validating the transfer function.

Method and system for validating safety of a medical device when exposed to magnetic resonance imaging fields

The present disclosure provides systems and methods for reducing RF heating in implantable leads. An implantable lead includes a first electrode, and a coupling component spaced from the first electrode, wherein the first electrode and the coupling component form a capacitor, wherein the first electrode and the coupling component are electrically isolated from one another at therapy frequencies, and wherein the first electrode and the coupling component are electrically coupled to one another at magnetic resonance imaging (MRI) frequencies.

Systems and methods for reducing RF heating in implantable leads

In accordance with one embodiment, a blood glucose sensing device is provided that comprises a house having of an exterior surface and that defines an interior space. The housing is configured to be located within a cardiovascular pathway of a patient. An inductor-capacitor (LC) circuit is located within the interior space defined by the housing. The inductor-capacitor circuit comprises an inductive circuit and a capacitive circuit electronically coupled to one another. The inductive and capacitive circuit has inductance and capacitance values that define a blood glucose sensitive resonant frequency such that a resonant frequency of the LC resonant circuit varies in response to changes in blood glucose levels within the blood in the cardiovascular pathway surrounding the housing.

Device and method for sensing blood glucose

A blood glucose sensing device is provided that comprises a house having an exterior surface and that defines an interior space. The housing is configures to be located within a cardiovascular pathway of a patient. A resonant antenna is located within the interior space defined by the housing. The resonant antenna comprises an inductive reactance and a capacitive reactance. The inductive and capacitive reactance have values that define a blood glucose sensitive resonant frequency such that a resonant frequency of the resonant antenna varies in response to changes in blood glucose levels within the blood in the cardiovascular pathway surrounding the housing.

Growing community of inventors

Valencia, CA, United States of America

Xi Lin Chen