Medtronic, Inc.

Boston Scientific Scimed, Inc.

Eric A Schilling

Bo Zhang

Karen J Kleckner

David Jerome Peichel

John W Komp

Gary P Kivi

Matthew R Yoder

Nicholas C Wine

Brian D Kuhnley

Joel B Artmann

Christopher T House

Jason C Lee

Stephen M Nelson

Manfred Justen

Jonathan P Roberts

Erin N Reisfeld

Ryan P Lahm

Brian W Schousek

David Siegfried

Subham Ghosh

Ronald A Drake

Lester O Stener

Mark W Shepler

Nathanael O Mason

David I Siegfried

Jeffrey M Gillberg

Robert A Betzold

John Rudser

Nathan A Grenz

Greggory R Herr

Nancy M Germanson

Jacob A Roe

Daniel S Flo

Michael A Reinert

Thomas W Radtke

Mauro Biffi

Geert G Morren

An example system includes memory configured to store a plurality of lead impedances (LeadZs) and processing circuitry communicatively coupled to the memory. The processing circuitry is configured to determine a first sensed LeadZ, and determine a second sensed LeadZ. The processing circuitry is configured to determine a first difference between the first sensed LeadZ and the second sensed LeadZ, and determine a parameter based at least in part on the first difference. The first sensed LeadZ and the second sensed LeadZ are sensed during a same first cardiac cycle or adjacent cardiac cycles of a heart that is receiving pacing.

Lead impedance measurement for physiological and device management

A method of controlling operation of an implantable blood pump includes attempting to restart a stopped implantable blood pump for a predetermined number of attempts with either power from an internal battery of a controller in communication with the implantable blood pump or transcutaneous energy transfer system (TETS) power in communication with the internal battery and the implantable blood pump. Following the predetermined number of attempts, the method includes pausing attempting to restart the implantable blood pump and begin attempting to recharge the internal battery with TETS power.

Method for pump start in a fully implanted LVAD system when multiple power sources may be present

In an implanted medical device system, an internal controller, external power transmitter and methods for performing battery conditioning are disclosed. According to one aspect, an internal controller includes processing circuitry configured to cause conditioning of an internal battery of the internal controller responsive to a direction from an external power transmitter in radio communication with the internal controller.

Automated and semi-automated designs for battery conditioning in a fully implanted LVAD

A method of managing a speed of implantable blood pump. The implantable blood pump is in communication with an internal battery and a transcutaneous energy transfer system (TETS). The method includes starting the pump at a programmed set speed. The speed of the pump is decreased from the programmed set speed to a minimum set speed if either a capacity of the internal battery is less than a predetermined reserve level and TETS power is unavailable, or there is insufficient TETS power to maintain the programmed set speed. The speed of the pump is progressively decreased from the programmed set speed if there is insufficient power to maintain the programmed set speed.

Managing pump speed when power constrained in a fully implanted LVAD system

A TETS having an external controller having a power source, a transmission coil in communication with the external controller, a receiving coil configured for transcutaneous inductive communication with the transmission coil, and an implantable controller in communication with the receiving coil and an implantable blood pump. The implantable controller has a battery configured to receive power from the receiving coil and the external controller is configured to categorize power transfer states based on predetermined thresholds of efficiency and power demand, and user display states (associated with optional configurable notifications) based on the power transfer states and predetermined temperature thresholds of the transmission coil.

TETS coil alignment conditions algorithm

A system for minimizing misalignment notifications for a TETS having an implantable blood pump, an external controller having a power source and a processing circuitry, a transmission coil in communication with the external controller, a receiving coil configured for transcutaneous inductive communication with the transmission coil, and an implantable controller in communication with the receiving coil and the implantable blood pump. The implantable controller having a power source configured to receive power from the receiving coil. The processing circuitry may be configured to: operate in a first mode where an alert is generated when a power efficiency transfer between the transmission coil and the receiving coil is below a first predetermined threshold; and operate in a second mode where the alert is only generated when the power remaining in the power source for the implantable controller is below a first predetermined power source threshold.

Method for minimizing misalignment notifications for a transcutaneous energy transfer system

According to one or more embodiments, a system is provided. The system includes a power device implantable within a patient for powering an implantable medical device. The power device includes a first coil configured to receive wireless power signals for powering the implantable medical device and processing circuitry configured to determine at least one measurable electrical characteristic in a plurality of electrical pathways in the power device including an electrical pathway to the first coil, and detect reduced performance in receiving wireless power signals based at least in part on the determined at least one measurable electrical characteristic.

Integrity monitoring for a transcutaneous energy system

In an implanted medical device system, an external power transmitter and methods for adjusting a rate of search pulse transmission by an external power transmitter of an implanted medical device system are disclosed. According to one aspect, a method includes detecting a condition of the external power transmitter, and selecting among rates of transmission of search pulses based on the detected condition.

Method for adjusting the rate of 'searching pulses' in a TETS system

Systems, apparatus, methods and non-transitory computer readable media facilitating telemetry data communication security between an implantable device and an external clinician device are provided. An implantable device can include a security component configured to generate security information based on reception of a clinician telemetry session request from the clinician device via a first telemetry communication protocol. The security information can include a session identifier and a first session key, and the clinician telemetry session request can include a clinician device identifier associated with the clinician device. The implantable device can further include a communication component configured to establish a clinician telemetry session with the clinician device using a second telemetry communication protocol based on determining that a connection request, received via the second telemetry communication protocol, was transmitted by the clinician device based on inclusion of the clinician device in the connection request.

Facilitating telemetry data communication security between an implantable device and an external device

An external power transmitter of an implanted medical device system such as a left ventricular assist device (LVAD) system and a method therefore are provided. According to one aspect, a method includes transitioning from applying a first external coil current limit to applying a second external coil current limit to limit current of an external coil coupled to the external power transmitter, the transitioning being based on at least one of an intent to enter a free mode of operation of the implanted medical device system, an existence of an alarm condition, and an existence of transcutaneous energy transfer system (TETS) power transfer.

Managing the electric field exposure in a fully implanted LVAD system

A transcutaneous energy transfer system (TETS) that includes external and internal coils that have permeable cores is provided. According to one aspect, the TETS includes an external coil having disposed in proximity thereto, a first set of at least one permeable core that is wound by windings of the external coil. The TETS also includes an internal coil having disposed in proximity thereto, for each permeable core disposed in proximity to the external coil, a corresponding permeable core that is wound by windings of the internal coil.

Magnetic alignment of transcutaneous energy transfer coils

A high contrast instrument, such as a radiopaque portion, can be captured and/or viewed in an image that is acquired with an imaging system, such as with a fluoroscopic imaging system. A statistical model can be used to assist in identifying a possible or probable location of a target. A user may move the instrument coil to the statistically probable location of the target to, for example, perform a procedure or carry out a task.

Guidance system for localization and cannulation of the coronary sinus

A method, implantable medical system and an external system for communicating an alert signal via a transcutaneous energy transfer system (TETS), with or without the presence of transmission of the alert signal by an alternative wireless communication system, are disclosed. According to one aspect, a method in an implanted medical system includes obtaining the alert signal based on an occurrence of an event, and transmitting the alert signal from the implanted medical device to the external system via a TETS used to transfer power requests to the external system.

Method for including redundancy in communicating an alert condition from an implanted system to an external system

A controller implantable within the body of a patient as part of a left ventricular assist device (LVAD) system and a method therefore are provided. According to one aspect, the controller includes processing circuitry configured to receive inputs from at least one of: at least one internal component of the LVAD system, at least one external component of the LVAD system, and at least one clinician's device, and determine a charging rate for charging a battery of the LVAD system internal to the patient based on at least one of the received inputs.

Growing community of inventors

Ham Lake, MN, United States of America

Eric A Schilling