公开(公告)号：US20230233131A1

公开(公告)日：2023-07-27

申请号：US18193457

申请日：2023-03-30

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang ,  Saul E. Greenhut ,  Yuanzhen Liu

IPC: A61B5/363 ,  A61B5/00 ,  A61B5/29

CPC classification number: A61B5/363 ,  A61B5/7264 ,  A61B5/686 ,  A61B5/4836 ,  A61B5/29 ,  A61B5/7203 ,  A61B5/7225

Abstract: A medical device is configured to sense an electrical signal and determine that signal to noise criteria are met based on electrical signal segments stored in response to sensed electrophysiological events. The medical device is configured to determine an increased gain signal segment from one of the stored electrical signal segments in response to determining that the signal to noise criteria are met. The medical device determines a noise metric from the increased gain signal segment. The stored electrical signal segment associated with the increased gain signal segment may be classified as a noise segment in response to the noise metric meeting noise detection criteria.

公开(公告)号：US11617534B2

公开(公告)日：2023-04-04

申请号：US17172770

申请日：2021-02-10

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang ,  Saul E. Greenhut ,  Yuanzhen Liu

IPC: A61B5/00 ,  A61B5/363 ,  A61B5/29

Abstract: A medical device is configured to sense an electrical signal and determine that signal to noise criteria are met based on electrical signal segments stored in response to sensed electrophysiological events. The medical device is configured to determine an increased gain signal segment from one of the stored electrical signal segments in response to determining that the signal to noise criteria are met. The medical device determines a noise metric from the increased gain signal segment. The stored electrical signal segment associated with the increased gain signal segment may be classified as a noise segment in response to the noise metric meeting noise detection criteria.

公开(公告)号：US11413469B2

公开(公告)日：2022-08-16

申请号：US16696129

申请日：2019-11-26

Applicant: Medtronic, Inc.

Inventor： Jian Cao ,  Timothy A. Ebeling ,  Saul E. Greenhut ,  Michael W. Heinks ,  Irving J. Sanchez ,  Paul R. Solheim ,  Xusheng Zhang ,  Gerald P. Arne

IPC: A61N1/39 ,  A61B5/00 ,  A61B5/287 ,  A61B5/352 ,  A61N1/05 ,  A61N1/362 ,  A61N1/365 ,  A61B5/361

Abstract: An implantable medical device system capable of sensing cardiac electrical signals includes a sensing circuit, a therapy delivery circuit and a control circuit. The sensing circuit is configured to receive a cardiac electrical signal and sense a cardiac event in response to the signal crossing a cardiac event sensing threshold. The therapy delivery circuit is configured to deliver an electrical stimulation therapy to a patient's heart via the electrodes coupled to the implantable medical device. The control circuit is configured to control the sensing circuit to set a starting value of the cardiac event sensing threshold and hold the starting value constant for a sense delay interval. The control circuit is further configured to detect an arrhythmia based on cardiac events sensed by the sensing circuit and control the therapy delivery circuit to deliver the electrical stimulation therapy in response to detecting the arrhythmia.

公开(公告)号：US11337636B2

公开(公告)日：2022-05-24

申请号：US16792466

申请日：2020-02-17

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang ,  Jian Cao ,  Saul E. Greenhut

IPC: A61B5/363 ,  A61N1/365 ,  A61N1/362 ,  A61N1/37 ,  A61B5/316 ,  A61B5/341 ,  A61B5/349 ,  A61B5/352 ,  A61B5/021 ,  A61B5/00 ,  A61N1/39 ,  A61B5/0245 ,  H03H21/00

Abstract: A medical device system, such as an extra-cardiovascular implantable cardioverter defibrillator ICD, senses R-waves from a first cardiac electrical signal by a first sensing channel and stores a time segment of a second cardiac electrical signal in response to each sensed R-wave. The medical device system determines a morphology parameter correlated to signal noise from time segments of the second cardiac electrical signal, detects a noisy signal segment based on the signal morphology parameter; and withholds detection of a tachyarrhythmia episode in response to detecting a threshold number of noisy signal segments.

公开(公告)号：US11197630B2

公开(公告)日：2021-12-14

申请号：US16377977

申请日：2019-04-08

Applicant: Medtronic, Inc.

Inventor： Saul E. Greenhut ,  Robert W. Stadler ,  Xusheng Zhang

IPC: A61N1/37 ,  A61B5/352 ,  A61B5/00 ,  A61B5/363 ,  A61N1/39

Abstract: A method and medical device for adjusting a blanking period that includes sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a plurality of sensing vectors, determining whether to adjust a blanking period during a first operating state, advancing from the first operating state to a second operating state in response to the sensed cardiac signals, determining, while in the second operating state, whether the blanking period was adjusted while in the first operating state, and adjusting the blanking period while in the second operating state in response to the blanking period being adjusted while in the first operating state.

公开(公告)号：US11033743B2

公开(公告)日：2021-06-15

申请号：US16390838

申请日：2019-04-22

Applicant: Medtronic, Inc.

Inventor： Saul E. Greenhut ,  Robert J. Nehls ,  Walter H. Olson ,  Xusheng Zhang ,  Wade M. Demmer ,  Troy E. Jackson ,  James D. Reinke

IPC: A61N1/372 ,  A61N1/362 ,  A61N1/375 ,  A61N1/39 ,  A61N1/05 ,  A61N1/365

Abstract: Techniques and systems for monitoring cardiac arrhythmias and delivering electrical stimulation therapy using a subcutaneous implantable cardioverter defibrillator (SICD) and a leadless pacing device (LPD) are described. For example, the SICD may detect a tachyarrhythmia within a first electrical signal from a heart and determine, based on the tachyarrhythmia, to deliver anti-tachyarrhythmia shock therapy to the patient to treat the detected arrhythmia. The LPD may receive communication from the SICD requesting the LPD deliver anti-tachycardia pacing to the heart and determine, based on a second electrical signal from the heart sensed by the LPD, whether to deliver anti-tachycardia pacing (ATP) to the heart. In this manner, the SICD and LPD may communicate to coordinate ATP and/or cardioversion/defibrillation therapy. In another example, the LPD may be configured to deliver post-shock pacing after detecting delivery of anti-tachyarrhythmia shock therapy.

公开(公告)号：US11020038B2

公开(公告)日：2021-06-01

申请号：US16278960

申请日：2019-02-19

Applicant: Medtronic, Inc.

Inventor： James D. Reinke ,  Xusheng Zhang ,  Vinod Sharma ,  Vladimir P. Nikolski ,  Michael B. Terry ,  Scott A. Hareland ,  Daniel L. Hansen ,  Donna M. Salmi

IPC: A61B5/04 ,  A61B5/363 ,  A61B5/316 ,  A61B5/00 ,  A61N1/37

Abstract: In situations in which an implantable medical device (e.g., a subcutaneous ICD) is co-implanted with a leadless pacing device (LPD), it may be important that the subcutaneous ICD knows when the LPD is delivering pacing, such as anti-tachycardia pacing (ATP). Techniques are described herein for detecting, with the ICD and based on the sensed electrical signal, pacing pulses and adjusting operation to account for the detected pulses, e.g., blanking the sensed electrical signal or modifying a tachyarrhythmia detection algorithm. In one example, the ICD includes a first pace pulse detector configured to obtain a sensed electrical signal and analyze the sensed electrical signal to detect a first type of pulses having a first set of characteristics and a second pace pulse detector configured to obtain the sensed electrical signal and analyze the sensed electrical signal to detect a second type of pulses having a second set of characteristics.

公开(公告)号：US20210038905A1

公开(公告)日：2021-02-11

申请号：US17068011

申请日：2020-10-12

Applicant: Medtronic, Inc.

Inventor： Jian Cao ,  Gerald P. Arne ,  Timothy A. Ebeling ,  Yanina Grinberg ,  Michael W. Heinks ,  Paul R. Solheim ,  Xusheng Zhang

IPC: A61N1/39 ,  A61N1/362 ,  A61N1/365 ,  A61N1/372

Abstract: An implantable medical device system is configured to sense cardiac events in response to a cardiac electrical signal crossing a cardiac event sensing threshold. A control circuit is configured to determine a drop time interval based on a heart rate and control a sensing circuit to hold the cardiac event sensing threshold at a threshold value during the drop time interval.

公开(公告)号：US10750970B2

公开(公告)日：2020-08-25

申请号：US16221921

申请日：2018-12-17

Applicant: Medtronic, Inc.

Inventor： Robert W. Stadler ,  Xusheng Zhang ,  Vinod Sharma ,  James D. Reinke ,  Barbara J. Schmid

IPC: A61N1/362 ,  A61B5/0464 ,  A61N1/372 ,  A61N1/375 ,  A61N1/39 ,  A61B5/04 ,  A61B5/00

Abstract: An implantable medical device comprises a sensing module configured to obtain electrical signals from one or more electrodes and a control module configured to process the electrical signals from the sensing module in accordance with a tachyarrhythmia detection algorithm to monitor for a tachyarrhythmia. The control module detects initiation of a pacing train delivered by a second implantable medical device, determines a type of the detected pacing train, and modifies the tachyarrhythmia detection algorithm based on the type of the detected pacing train.

公开(公告)号：US10561332B2

公开(公告)日：2020-02-18

申请号：US15653969

申请日：2017-07-19

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang ,  Jian Cao ,  Saul E. Greenhut

IPC: A61B5/0464 ,  A61B5/021 ,  A61B5/04 ,  A61B5/00 ,  A61N1/39 ,  A61B5/0452 ,  A61B5/0245 ,  A61N1/37 ,  H03H21/00

Abstract: A medical device system, such as an extra-cardiovascular implantable cardioverter defibrillator ICD, senses R-waves from a first cardiac electrical signal by a first sensing channel and stores a time segment of a second cardiac electrical signal in response to each sensed R-wave. The medical device system determines a morphology parameter correlated to signal noise from time segments of the second cardiac electrical signal, detects a noisy signal segment based on the signal morphology parameter; and withholds detection of a tachyarrhythmia episode in response to detecting a threshold number of noisy signal segments.