Medtronic, Inc.

Boston Scientific Scimed, Inc.

Michael Kemmerer

Todd Jon Sheldon

Wade M Demmer

Jian L Cao

Ronald A Drake

David Jerome Peichel

Jonathan P Roberts

Robert Michael Ecker

Kathryn Hilpisch

Michael W Heinks

Yanina Grinberg

Vincent P Ganion

Michael L Hudziak

Joel B Artmann

Jacob A Roe

James J St Martin

Alexander R Mattson

Anthony W Schrock

Jean E Hudson

Maureen E Lybarger

Scott G Sorenson

Pamela K Omdahl

Kristina Yates

An internal coil interface implantable within the body of a patient and configured to modulate a load on an internal coil, and a method therefore are provided. According to one aspect, processing circuitry of the internal coil interface is configured to predict a time of a first voltage level crossing by a voltage at a terminal of the internal coil for each of a plurality of successive windows each time the capacitance is switched into the modulated load circuit or each time the capacitance is switched out of the modulated load circuit. The process is also configured to adjust the predictions based on whether a previous prediction of a time of a first voltage level crossing for a window was later or earlier than a time at which the first voltage level crossing actually occurred.

Rectifier and the timing of switching of capacitors

A medical system is configured to deliver an implantable medical device to a targeted implant site. The system may include a processor configured to receive a cardiac electrical signal and determine a feature of the cardiac electrical signal. The processor may be configured to determine a position of the delivery tool based on at least one feature of the cardiac electrical signal. The processor may detect a deployment position of the delivery tool in response to the cardiac electrical signal feature meeting criteria for detecting the deployment position.

System and method for detecting medical device delivery tool position

A lead impedance stimulation architecture and a dual current source and sink methodology to output a biphasic current pulse and measure a resulting induced voltage across the stimulation electrodes to determine lead impedance. A common mode capacitance on the electrode interface may have little impact on the stimulation architecture of this disclosure allowing for fast voltage rise time and consistent and accurate impedance measurement. In addition, the dual source and sink includes a monitor circuit on each of the source and the sink circuitry. In the event of an open circuit indicating a lead breakage, loose connection, lead migration, insulation leak, and so on, the monitor circuit may provide an output to indicate specifically which electrode is unable to reach the correct current stimulation amplitude. In this manner the techniques of this disclosure, may also detect a lead break in a single lead impedance measurement.

Impedance measurement circuit architecture

A medical device is configured to set a post-atrial time interval in response to an atrial event and generate an event time signal in response to a ventricular electrical signal crossing an R-wave sensing threshold during the post-atrial time interval. The device accumulates oversensing evidence in response to the event time signal and adjusts a ventricular sensing control parameter based on the accumulated oversensing evidence in some examples.

Ventricular sensing control in a cardiac pacing system

A controller for an implantable blood pump including processing circuitry configured to operate the implantable blood pump and a piezoelectric element in communication with the implantable blood pump.

Detecting pump suction, pump thrombus, and other adverse VAD motor events

Growing community of inventors

Victoria, MN, United States of America

Michael Kemmerer