Computing Energy Required Or Contact Impedance Patents (Class 607/8)
  • Patent number: 10278765
    Abstract: A system and method of controlling the application of energy to tissue using measurements of impedance are described. The impedance, correlated to the temperature, may be set at a desired level, such as a percentage of initial impedance. The set impedance may be a function of the initial impedance, the size and spacing of the electrodes, the size of a targeted passageway, and so on. The set impedance may then be entered into a PID algorithm or other control loop algorithm in order to extract a power to be applied to a treatment device.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: May 7, 2019
    Assignee: Boston Scientific Scimed, Inc.
    Inventor: Jerry Jarrard
  • Patent number: 10064566
    Abstract: Systems and methods for electrocardiography monitoring use multiple capacitive sensors in order to determine reliable measurements of electrophysiological information of a patient. Relative coupling strength and/or reliability is used to select dynamically which sensors to use in order to determine, in particular, an electrocardiogram of the patient.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: September 4, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Louis Nicolas Atallah, Mohammed Meftah, Martijn Schellekens, Aline Anne Marie Serteyn, Rik Vullings, Jan Bergmans
  • Patent number: 9981140
    Abstract: An external defibrillator can have a synchronous shock operating mode and an asynchronous shock operating mode and include a controller to set the defibrillator in the synchronous shock operating mode or the asynchronous shock operating mode. The defibrillator can also include a shock module to cause the defibrillator to deliver shock therapy to the patient according to the operating mode of the defibrillator, and a prompt module to transmit a prompt, after delivery of the shock therapy, that includes the operating mode of the defibrillator.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: May 29, 2018
    Assignee: Physio-Control, Inc.
    Inventors: Robert G. Walker, Fred W. Chapman, Isabelle Banville
  • Patent number: 9981141
    Abstract: The defibrillator may include a heart rhythm detector to detect the heart rhythm of a patient, a manual mode controller structured to set the defibrillator in a synchronous shock operating mode or an asynchronous shock operating mode depending on an input from a human operator, a shock module to cause the defibrillator to deliver a shock to the patient according to the operating mode, and an automatic mode controller structured to, after the shock module has delivered the shock to the patient, set the external defibrillator to the synchronous shock operating mode or the asynchronous shock operating mode depending on the detected heart rhythm of the patient and without input from the human operator.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 29, 2018
    Assignee: Physio-Control, Inc.
    Inventors: Robert G. Walker, Fred W. Chapman, Isabelle Banville, James W. Taylor
  • Patent number: 9956417
    Abstract: A technique for identifying lead-related conditions, such as insulation breaches and/or externalization of lead conductors, includes analyzing characteristics of electrical signals generated on one or more electrode sensing vectors of the lead by a test signal to determine whether a lead-related condition exists. The characteristics of the electrical signals induced on the lead by the test signal may be significantly different on a lead having an insulation breach or externalized conductor than on a lead not having such lead-related conditions. As such, the implantable medical device may be subject to a known test signal and analyze the signals on the lead to detect lead-related conditions.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 1, 2018
    Assignee: Medtronic, Inc.
    Inventors: ShaileshKumar V. Musley, Bruce D. Gunderson, Walter H. Olson, Jennifer P. Miller
  • Patent number: 9839781
    Abstract: A system to measure intracardiac impedance includes implantable electrodes and a medical device. The electrodes sense electrical signals of a heart of a subject. The medical device includes a cardiac signal sensing circuit coupled to the implantable electrodes, an impedance measurement circuit coupled to the same or different implantable electrodes, and a controller circuit coupled to the cardiac signal sensing circuit and the impedance measurement circuit. The cardiac signal sensing circuit provides a sensed cardiac signal. The impedance measurement circuit senses intracardiac impedance between the electrodes to obtain an intracardiac impedance signal. The controller circuit determines cardiac cycles of the subject using the sensed cardiac signal, and detects tachyarrhythmia using cardiac-cycle to cardiac-cycle changes in a plurality of intracardiac impedance parameters obtained from the intracardiac impedance signal.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: December 12, 2017
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Yunlong Zhang, James O. Gilkerson, Yongxing Zhang, Loell Boyce Moon
  • Patent number: 9827435
    Abstract: An external defibrillator, such as a wearable defibrillator can have a heart rhythm detector to detect the heart rhythm of a patient. The defibrillator can also have a synchronous shock operating mode and an asynchronous shock operating mode. A controller can set the defibrillator in the synchronous shock operating mode or the asynchronous shock operating mode. The defibrillator can also include a shock module to cause the defibrillator to deliver shock therapy to the patient according to the operating mode of the defibrillator and a sync module configured to identify a first portion of the heart rhythm detected from a first ECG lead with which to time the delivery of the shock therapy to the patient when the operating mode of the defibrillator is in synchronous shock operating mode. A comparator module can compare timing of a QRS complex detected from the first ECG lead with the timing of the QRS complex detected by the second EGG lead.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: November 28, 2017
    Inventors: Robert G. Walker, Fred W. Chapman, Isabelle Banville
  • Patent number: 9776012
    Abstract: When a defibrillator selects a dosage of energy or current to be delivered to a patient, the defibrillator selects an excitation current frequency and applies the excitation current at the selected frequency to the patient. The frequency of the excitation current is selected as a function of the dosage to be delivered. The patient's response to the excitation current at the selected frequency will accurately reflect the impedance that the defibrillator will “see” when delivering the selected dosage of energy or current.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: October 3, 2017
    Assignee: Physio-Control, Inc.
    Inventors: Fred Chapman, Joseph Sullivan, Scott Schweizer
  • Patent number: 9750938
    Abstract: An implantable medical device (IMD) system communicates to a user information regarding the surrounding biological environment and the influence of that surrounding biological environment on IMD functionality. This influence can be static or dynamic. Providing information on the biological environment can assist the user in determining therapy parameters for an individual patient with an IMD.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: September 5, 2017
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David J. Ternes, Brian D. Soltis, LeAnne M. Eberle
  • Patent number: 9289590
    Abstract: A peelable lid system includes a peelable lid, a seal configured to seal the peelable lid to a container, a handle coupled to the peelable lid, and a lifting mechanism coupled to handle. The lifting mechanism can be coupled to the peelable lid at a plurality of attachment points, including at least one attachment point coupled to the peelable lid away from the handle. The lifting mechanism can be configured to lift at least one portion of the peelable lid near each of the plurality of attachment points.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: March 22, 2016
    Assignee: PHYSIO-CONTROL, INC.
    Inventors: Ethan Albright, Ramesh Ammanath, Peter Wesley Bristol
  • Patent number: 9272142
    Abstract: The present application discloses systems and methods for displaying and operating a user interface having one or more channel group controllers corresponding to one or more groups of hearing prosthesis channels. The hearing prosthesis may be configured to generate a plurality of signals via a plurality of channels based on a channel profile. The channel profile may define at least one intensity level for each channel. In operation, the user interface may be configured to instruct the hearing prosthesis to change the channel profile of the plurality of channels in response to receiving an input via one of the channel group controllers. The user interface may be used to fit a hearing prosthesis to a recipient. In one embodiment, an initial channel profile may be automatically determined, and the prosthesis channel profile may be adjusted by changing a representative intensity level corresponding to the channel profile.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: March 1, 2016
    Assignee: Cochlear Limited
    Inventors: Andrew Botros, Bastiaan Van Dijk, Rami Banna
  • Patent number: 9044610
    Abstract: Techniques are provided for controlling and delivering spinal cord stimulation (SCS) or other forms of neurostimulation. In one example, neurostimulation pulses are generated wherein successive pulses alternate in polarity so that a pair of electrodes alternate as cathodes. Each pulse has a cathodic amplitude sufficient to achieve cathodic capture of tissues adjacent the particular electrode used as the cathode for the pulse. The neurostimulation pulses are delivered to patient tissues using the electrodes to alternatingly capture tissues adjacent opposing electrodes via cathodic capture to achieve a distributed virtual stimulation cathode. Various pulse energy savings techniques are also set forth that exploit the distributed virtual stimulation cathode.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: June 2, 2015
    Assignee: PACESETTER, INC.
    Inventors: Stuart Rosenberg, Martin Cholette, Xiaoyi Min
  • Patent number: 9008773
    Abstract: An implantable medical device capable of sensing cardiac signals and delivering cardiac electrical stimulation therapies is enabled to detect a short circuit condition. In one embodiment, a cardiac signal is sensed by a sensing module coupled to electrodes. A controller identifies signal events in response to the cardiac signal and detects a short circuit condition in response to at least one of the signal events having an amplitude crossing a short circuit detection threshold and a maximum of two signal events crossing the short circuit detection threshold occurring between two adjacent events having amplitudes not crossing the short circuit detection threshold. In one embodiment, the signal events are identified from a differential signal determined from the sensed cardiac signal.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: April 14, 2015
    Assignee: Medtronic, Inc.
    Inventor: Bruce D. Gunderson
  • Publication number: 20150094783
    Abstract: A system and method for long-term monitoring of cardiac conditions such as arrhythmias is disclosed. The invention includes a pulse generator including means for sensing an arrhythmia. The pulse generator is coupled to at least one subcutaneous electrode or electrode array for providing electrical stimulation such as cardioversion/defibrillation shocks and/or pacing pulses. The electrical stimulation may be provided between multiple subcutaneous electrodes, or between one or more such electrodes and the housing of the pulse generator. In one embodiment, the pulse generator includes one or more electrodes that are isolated from the can. These electrodes may be used to sense cardiac signals.
    Type: Application
    Filed: September 18, 2014
    Publication date: April 2, 2015
    Inventors: Ward M. Brown, Stephen D. Heinrich
  • Publication number: 20150088215
    Abstract: An external defibrillator includes patient electrodes (20) for obtaining the patient's electrocardiogram (ECG) and for applying a shock to the patient. A microprocessor (24) analyses the patient's ECU using a diagnostic algorithm to detect if the patient's heart is in a shockable rhythm, and shock delivery circuitry (10) is enabled when a shockable rhythm is detected by the diagnostic algorithm. The patient electrodes also allow obtaining a signal (Z) which is a measure of the patient's transthoracic impedance and the microprocessor is responsive to Z to detect conditions likely to cause the diagnostic algorithm to generate a false detection of a shockable rhythm. If such detection is made, the microprocessor prevents detection of a shockable rhythm by the diagnostic algorithm, at least for a period of time.
    Type: Application
    Filed: December 5, 2014
    Publication date: March 26, 2015
    Inventors: Cesar Oswaldo Navarro-Paredes, John McCune, Janice Anderson
  • Patent number: 8958875
    Abstract: Implantable medical devices switch from a constant current mode of operation to a constant voltage mode of operation. The switching may be based on the device determining that tissue impedance stability has occurred. The determination may be a measurement of output voltage stability of the constant current source or based on other factors such as an amount of time that has elapsed. The switching may be as the result of an externally generated request such as by a clinician via an external device. The implantable medical device may begin constant voltage mode by utilizing stimulation parameters based on those initially programmed for constant current mode and based upon a measurement of voltage amplitude being output by the constant current source prior to the switch.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: February 17, 2015
    Assignee: Medtronic, Inc.
    Inventors: Kevin J. Kelly, Matthew J. Michaels, Gregory F. Molnar, Jonathan C. Werder
  • Patent number: 8942798
    Abstract: A method, apparatus, and system for determining an adverse operational condition associated with a lead assembly in an implantable medical device used for providing a therapeutic electrical signal to a cranial nerve. A first impedance associated with the lead assembly configured to provide the therapeutic electrical signal to a cranial nerve is detected. A determination is made as to whether the first impedance is outside a first predetermined range. A second impedance is detected. The detection of the second impedance is performed within a predetermined period of time from the time of the detection of the first impedance. A determination is made as to whether the second impedance is outside a second predetermined range. If the first impedance is outside the first range and the second impedance is outside the second range, the implantable medical device is prevented from providing the therapeutic electrical signal.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: January 27, 2015
    Assignee: Cyberonics, Inc.
    Inventors: Randolph K. Armstrong, Albert A. Rodriguez, Steven E. Maschino
  • Publication number: 20140364918
    Abstract: A method of treating a patient for ventricular tachycardia using a wearable defibrillator includes monitoring the patient for a predetermined condition via one or more electrodes on the defibrillator, sending a message to the patient in response to the predetermined condition, activating the defibrillator so that the defibrillator delivers defibrillation energy to the patient, and storing at least one of the results of the monitoring, sending and activating steps in a memory on the defibrillator. The method also includes downloading information stored in the memory of the defibrillator to a base station having an external interface, and transmitting the information downloaded from the memory of the base station to an external location via the external interface of the base station.
    Type: Application
    Filed: June 18, 2014
    Publication date: December 11, 2014
    Inventors: James M. Owen, Randall W. Fincke, James P. O'Leary, Mark H. Totman
  • Patent number: 8897885
    Abstract: A method and associated stimulation device for ensuring firing of an action potential in an intended physiological target activated by a stimulus pulse generated by an electrode of a non-invasive surface based stimulation device irrespective of skin-to-electrode impedance by: (i) increasing internal impedance of the stimulation device so as to widen a Chronaxie time period thereby ensuring firing of the action potential of the intended physiological target irrespective of the skin-to-electrode impedance; and/or (ii) generating a stimulation waveform that optimizes a non-zero average current (e.g., non-zero slope of the envelope of the stimulation waveform) during preferably substantially the entire current decay of the stimulus pulse.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: November 25, 2014
    Assignee: Ethicon, Inc.
    Inventors: Anthony DiUbaldi, Stephen Wahlgren
  • Patent number: 8880168
    Abstract: A modular external defibrillator system in embodiments of the teachings may include one or more of the following features: a base containing a defibrillator to deliver a defibrillation shock to a patient, (b) one or more pods each connectable to a patient via patient lead cables to collect at least one patient vital sign, the pods operable at a distance from the base, (c) a wireless communications link between the base and a selected one of the two or more pods to carry the at least one vital sign from the selected pod to the base, the selection being based on which pod is associated with the base.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: November 4, 2014
    Assignee: Physio-Control, Inc.
    Inventors: Christopher Pearce, Thomas J. McGrath, Randy L. Merry, John C. Daynes, Kenneth J. Peterson, Peter Wung, Michael D. McMahon, D. Craig Edwards, Eric T. Holerman, Rockland W. Nordness, James S. Neumiller
  • Publication number: 20140324113
    Abstract: A device and method for reducing patient transthoracic impedance for the purpose of delivering a therapeutic current are provided. In one embodiment, the device for reducing patient transthoracic impedance for the purpose of delivering a therapeutic current may be used in a defibrillator. The device for reducing patient transthoracic impedance for the purpose of delivering a therapeutic current may be a microneedle array that may have a number of different configurations and may be made with different materials.
    Type: Application
    Filed: July 14, 2014
    Publication date: October 30, 2014
    Inventors: Walter T. Savage, Shelley J. Savage, Walter N. Maclay, Douglas C. Morrison, Thomas K. Geraty, Mark D. Brinkerhoff, Ronald S. Boeder, Tony M. Ton, Jeffrey S. Greger, Peter Gray
  • Patent number: 8862227
    Abstract: Embodiments of the present concept are directed to external defibrillators that include an electrode connection port having multiple connection options, and include a detection device to determine an electrode connection configuration so as to provide an appropriate electrical shock to a patient. The detection device detects the electrode connection configuration of a plug connector for connected electrodes to determine if the plug connector is in an adult orientation or a pediatric orientation. The external defibrillator is configured to a deliver an electrical shock with less energy when the pediatric orientation is detected rather than the adult orientation.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: October 14, 2014
    Assignee: Physio-Control, Inc.
    Inventors: Ryan William Apperson, John Carlton Daynes, Kelly Schneiderman
  • Patent number: 8855760
    Abstract: Techniques are provided for use with an implantable medical device for detecting breaches in lead insulation or other lead failures. In one example, bipolar impedance is measured along single-lead vectors (i.e. intra-lead vectors) of a right atrial (RA) lead and a right ventricular (RV) leads. Impedance is also measured along various cross-lead vectors (i.e. inter-lead vectors) between electrodes of the two leads. A derived impedance value is then determined from a combination of the measured impedance values, wherein the derived impedance is sensitive to a shunt impedance arising from a breach within the RV lead. A lead breach is then detected relatively early based on the derived impedance by detecting a significant deviation in derived impedance over time. Unipolar impedance measurements are used to confirm the breach.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: October 7, 2014
    Assignee: Pacesetter, Inc.
    Inventor: Xing Pei
  • Publication number: 20140277229
    Abstract: An implantable medical device capable of sensing cardiac signals and delivering cardiac electrical stimulation therapies is enabled to detect a short circuit condition. In one embodiment, a cardiac signal is sensed by a sensing module coupled to electrodes. A controller identifies signal events in response to the cardiac signal and detects a short circuit condition in response to at least one of the signal events having an amplitude crossing a short circuit detection threshold and a maximum of two signal events crossing the short circuit detection threshold occurring between two adjacent events having amplitudes not crossing the short circuit detection threshold. In one embodiment, the signal events are identified from a differential signal determined from the sensed cardiac signal.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: MEDTRONIC, INC.
    Inventor: Bruce D. Gunderson
  • Publication number: 20140277230
    Abstract: Electrical energy delivery tissue site validation systems and methods can determine an indication of a tissue type at a tissue site. This information can be used to enable or inhibit electrical energy delivery to the tissue site. The tissue type at the tissue site can be determined such as by delivering a test electrical energy and sensing a responsive electrical energy. An electrical connectivity to the tissue site can also be determined, such as by using a sensed intrinsic electrical signal at the tissue site. Tissue type information may be communicated externally, such as to allow user confirmation or override of the determined indication of tissue type at the tissue site, such as by a physician, user, or other operator.
    Type: Application
    Filed: March 11, 2014
    Publication date: September 18, 2014
    Applicant: Cardiac Pacemakers, Inc.
    Inventor: David J. Ternes
  • Publication number: 20140257422
    Abstract: A system and method of detecting a loss of electrical contact between a pair of electrodes that are electrically coupled to skin of a subject. The method includes monitoring parameters of a transthoracic impedance between the pair of electrodes in at least one of a low frequency regime and a high frequency regime, detecting an occurrence of chest compressions based on a signal indicative of chest compressions, establishing baseline levels of the parameters in at least one of the low and high frequency regimes, detecting whether changes in at least one parameter exceeds the baseline level by a threshold, determining that at least one electrode of the pair of electrodes is losing electrical contact with the skin responsive to the at least one parameter exceeding the baseline level by the threshold, and issuing an alert in response to a determination that the at least one electrode is losing electrical contact.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 11, 2014
    Applicant: ZOLL MEDICAL CORPORATION
    Inventor: Ulrich Herken
  • Patent number: 8808342
    Abstract: Nano-constructs comprising nanoshells and methods of using the nano-constructs for treating or ameliorating a vascular condition are provided.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: August 19, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventor: Florian Niklas Ludwig
  • Publication number: 20140214107
    Abstract: One aspect of this disclosure relates to a system for dynamic battery management in implantable medical devices. An embodiment of the system includes two or more devices for measuring battery capacity for an implantable medical device battery. The embodiment also includes a controller connected to the measuring devices. The controller is adapted to combine the measurements from the measuring devices using a weighted average to determine battery capacity consumed. According to various embodiments, at least one of the measuring devices includes a coulometer. At least one of the measuring devices includes a capacity-by-voltage device, according to an embodiment. The system further includes a display in communication with the controller in various embodiments. The display is adapted to provide a depiction of battery longevity in units of time remaining in the life of the implantable medical device battery, according to various embodiments. Other aspects and embodiments are provided herein.
    Type: Application
    Filed: April 2, 2014
    Publication date: July 31, 2014
    Applicant: Cardiac Pacemakers, Inc.
    Inventors: Rajesh K. Gandhi, William J. Linder, Michael J. Lyden, Nicholas J. Stessman, Jonathan H. Kelly, James Kalgren
  • Patent number: 8792992
    Abstract: An apparatus comprises an electrostimulation energy storage capacitor, a circuit path communicatively coupled to the electrostimulation energy storage capacitor and configured to provide quasi-constant current neural stimulation through a load from the electrostimulation energy storage capacitor, a current measuring circuit communicatively coupled to the circuit path and configured to obtain a measure of quasi-constant current delivered to the load, and a control circuit communicatively coupled to the current measuring circuit, wherein the control circuit is configured to initiate adjustment of the voltage level of the storage capacitor for a subsequent delivery of quasi-constant current according to a comparison of the measured load current to a specified load current value.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: July 29, 2014
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: William J. Linder, Keith R. Maile, Ramprasad Vijayagopal, Ron A. Balczewski
  • Publication number: 20140207201
    Abstract: In embodiments, a wearable cardiac defibrillator system includes an energy storage module configured to store a charge. Two electrodes can be configured to be applied to respective locations of a patient. One or more reservoirs can store one or more conductive fluids. Respective fluid deploying mechanisms can be configured to cause the fluids to be released from one or more of the reservoirs, which decreases the impedance at the patient location, and decreases discomfort for the patient. In some embodiments an impedance is sensed between the two electrodes, and the stored charge is delivered when the sensed impedance meets a discharge condition. In some embodiments, different fluids are released for different patient treatments. In some embodiments, fluid release is controlled to be in at least two doses, with an intervening pause.
    Type: Application
    Filed: January 22, 2014
    Publication date: July 24, 2014
    Applicant: Physio-Control, Inc.
    Inventors: Daniel Ralph Piha, Joseph Leo Sullivan, Phillip Dewey Foshee, JR., Daniel Peter Finch, Isabelle Banville, Laura Marie Gustavson, Kenneth Frederick Cowan, Richard C. Nova, Robert Reuben Buchanan, Krystyna Szul, Gregory T. Kavounas
  • Patent number: 8788056
    Abstract: A neural stimulation system automatically corrects or adjusts the stimulus magnitude (stimulation energy) in order to maintain a comfortable and effective stimulation therapy. Because the changes in impedance associated with the electrode-tissue interface can indicate obstruction of current flow and positional lead displacement, lead impedance can indicate the quantity of electrical stimulation energy that should be delivered to the target neural tissue to provide corrective adjustment. Hence, a change in impedance or morphology of an impedance curve may be used in a feedback loop to indicate that the stimulation energy needs to be adjusted and the system can effectively auto correct the magnitude of stimulation energy to maintain a desired therapeutic effect.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: July 22, 2014
    Assignee: Boston Scientific Neuromodulation Corporation
    Inventors: John D. H. King, James R. Thacker
  • Patent number: 8771165
    Abstract: Provided is a ventricular assist device cannula, and more particularly, a ventricular assist device cannula with electrodes. An exemplary embodiment of the present invention provides a ventricular assist device cannula with electrodes, including: a connecting tube connecting an incision of a body tissue and a ventricular assist device so that blood can flow; and electrodes connected with the connecting tube and contacting the incision of the body tissue to transfer an electric signal to the body tissue. The ventricular assist device cannula with electrodes according to the exemplary embodiment of the present invention has effects as follows. First, a bio-signal of a patient wearing the ventricular assist device through the electrode attached to the conduit can be easily measured without a separate electrode implant and an electric stimulus can also be measured.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: July 8, 2014
    Assignee: Libraheart, Inc.V
    Inventors: Sung Wook Choi, Byoung Goo Min
  • Patent number: 8768460
    Abstract: A system and method for painlessly calculating an estimated defibrillation threshold, such as by using an implantable medical device and a controller. The estimated defibrillation threshold can be calculated using a delivered first energy to a first thoracic location, an electric field detected at a second thoracic location, and an electric field detected between a third thoracic location and a fourth thoracic location. The estimated defibrillation threshold represents an energy that, when delivered at the first thoracic location, can create an electric field strength in a target region of the heart that meets or exceeds a target electric field strength.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: July 1, 2014
    Assignee: Cardiac Pacemakers, Inc.
    Inventor: Xuan Wei
  • Patent number: 8761875
    Abstract: One embodiment of the present subject matter includes a method for pulse generation in an implantable device, comprising measuring an impedance between a first electrode and a second electrode and delivering a pulse based on a pulse energy level and a pulse duration limit, comprising generating a pulse duration as a function of the pulse energy level and the impedance and selecting a capacitance value from a plurality of capacitances in a partitioned capacitor bank to deliver a pulse at the pulse energy level and wherein the pulse duration is less than the pulse duration limit.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: June 24, 2014
    Assignee: Cardiac Pacemakers, Inc.
    Inventor: Gregory J. Sherwood
  • Patent number: 8755873
    Abstract: An instrument that utilizes body contact electrodes evaluates the quality of the connections made between the electrodes and the body. An electrode contact quality evaluation circuit performs the quality evaluation, such as by determining contact impedances for the electrodes. The corresponding contact quality of each electrode is conveyed to the user.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: June 17, 2014
    Assignee: Welch Allyn, Inc.
    Inventor: Richard A. Sunderland
  • Patent number: 8738130
    Abstract: A device for assisting a rescuer in delivering therapy to an adult or pediatric patient, the device including a user interface comprising a display and/or audio speakers, the user interface being configured to deliver prompts to a rescuer to assist the rescuer in delivering therapy to a patient; a processor configured to provide prompts to the user interface and to perform an ECG analysis algorithm on ECG information detected from the patient; at least one detection element configured to determine without rescuer input via the user interface that a pediatric patient is being treated; wherein, if a pediatric patient is detected, the processor modifies the ECG analysis algorithm or the prompts provided to the user interface to use an ECG analysis algorithm or prompts adapted for a pediatric patient rather than for an adult patient.
    Type: Grant
    Filed: April 12, 2005
    Date of Patent: May 27, 2014
    Assignee: ZOLL Medical Corporation
    Inventors: Gary A. Freeman, Ziad F. Elghazzawi, Frederick J. Geheb, Michael Parascandola
  • Patent number: 8738128
    Abstract: A modular external defibrillator system in embodiments of the teachings may include one or more of the following features: a base containing a defibrillator to deliver a defibrillation shock to a patient, (b) one or more pods each connectable to a patient via patient lead cables to collect at least one patient vital sign, the pods operable at a distance from the base, (c) a wireless communications link between the base and a selected one of the two or more pods to carry the at least one vital sign from the selected pod to the base, the selection being based on which pod is associated with the base.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: May 27, 2014
    Assignee: Physio-Control, Inc.
    Inventors: Christopher Pearce, Thomas J. McGrath, Randy L. Merry, John C. Daynes, Kenneth J. Peterson, Peter Wung, Michael D. McMahon, D. Craig Edwards, Eric T. Hoierman, Rockland W. Nordness, James S. Neumiller
  • Patent number: 8700156
    Abstract: Methods and apparatus for accurately and painlessly measuring the impedance between defibrillation electrodes implanted in a patient utilize a high current test pulse delivered with a sufficiently high current to produce an accurate measurement of the defibrillation electrode impedance while limiting the duration of the test pulse such that the pain sensing cells in the patient do not perceive the test pulse. In one embodiment, the test pulse is generated from the high voltage transformer without storing energy in the high voltage capacitors and is delivered to the defibrillation electrodes in the patient utilizing the high voltage switching circuitry.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: April 15, 2014
    Assignee: Lamda Nu, LLC
    Inventor: Mark W. Kroll
  • Publication number: 20140094869
    Abstract: An external defibrillator may have a controller to set the defibrillator in a synchronous shock operating mode or an asynchronous shock operating mode, a shock module to cause the defibrillator to deliver shock therapy to a patient according to the present operating mode of the defibrillator, and a heart rhythm detector to detect a heart rhythm of the patient. The defibrillator may also have a mode assessment module to determine whether the present operating mode or selected defibrillation energy of the defibrillator is appropriate based on the detected heart rhythm of the patient.
    Type: Application
    Filed: September 30, 2013
    Publication date: April 3, 2014
    Applicant: Physio-Control, Inc.
    Inventors: Robert G. Walker, Fred W. Chapman, Isabelle Banville
  • Publication number: 20140052206
    Abstract: Systems and methods are provided for graphically configuring leads for a medical device. According to one aspect, the system generally comprises a medical device and a processing device, such as a programmer or computer, adapted to be in communication with the medical device. The medical device has at least one lead with at least one electrode in a configuration that can be changed using the processing device. The processing device provides a graphical display of the configuration, including a representative image of a proposed electrical signal to be applied by the medical device between the at least one electrode of the medical device and at least one other electrode before the medical device applies the electrical signal between the at least one electrode and the at least one other electrode. In one embodiment, the graphical display graphically represents the lead(s), the electrode(s), a pulse polarity, and a vector.
    Type: Application
    Filed: October 27, 2013
    Publication date: February 20, 2014
    Applicant: Cardiac Pacemakers, Inc.
    Inventors: Par Lindh, James R. Kalgren, Rene H. Wentkowski, John Lockhart
  • Patent number: 8644925
    Abstract: A wearable therapeutic device to facilitate care of a subject is provided. The wearable therapeutic device can include a garment having a sensing electrode. The garment includes at least one of an inductive element and a capacitive element, and a controller identifies an inductance of the inductive element or a capacitance of the capacitive element, and determines a confidence level of information received from the sensing electrode based on the inductance or the capacitance. The wearable therapeutic device also includes an alarm module coupled with the controller and configured to provide a notification to a subject based on the confidence level.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: February 4, 2014
    Assignee: Zoll Medical Corporation
    Inventors: Shane S. Volpe, Thomas E. Kaib
  • Patent number: 8620424
    Abstract: An implantable medical device and associated method control the delivery of extra systolic stimulation by determining a coupling interval, setting an extra systolic interval in response to the coupling interval; and delivering a supraventricular stimulation pulse upon expiration of the extra systolic interval. The supraventricular stimulation pulse evokes a depolarization that is conducted to the ventricles occurring at a ventricular coupling interval relative to a ventricular event.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: December 31, 2013
    Assignee: Medtronic, Inc.
    Inventors: Richard P. M. Houben, Berthold Stegemann, Richard Cornelussen
  • Patent number: 8608636
    Abstract: Provided is a ventricular assist device cannula, and more particularly, a ventricular assist device cannula with electrodes. An exemplary embodiment of the present invention provides a ventricular assist device cannula with electrodes, including: a connecting tube connecting an incision of a body tissue and a ventricular assist device so that blood can flow; and electrodes connected with the connecting tube and contacting the incision of the body tissue to transfer an electric signal to the body tissue.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: December 17, 2013
    Assignee: Libraheart, Inc.V
    Inventors: Sung Wook Choi, Byoung Goo Min
  • Patent number: 8600497
    Abstract: An implantable device monitors and treats heart failure, pulmonary edema, and hemodynamic conditions and in some cases applies therapy. In one implementation, the implantable device applies a high-frequency multi-phasic pulse waveform over multiple-vectors through tissue. The waveform has a duration less than the charging time constant of electrode-electrolyte interfaces in vivo to reduce intrusiveness while increasing sensitivity and specificity for trending parameters. The waveform can be multiplexed over multiple vectors and the results cross-correlated or subjected to probabilistic analysis or thresholding schemata to stage heart failure or pulmonary edema. In one implementation, a fractionation morphology of a sensed impedance waveform is used to trend intracardiac pressure to stage heart failure and to regulate cardiac resynchronization therapy. The waveform also provides unintrusive electrode integrity checks and 3-D impedancegrams.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: December 3, 2013
    Assignee: Pacesetter, Inc.
    Inventors: Weiqun Yang, Malin Ohlander, Louis Wong, Nils Holmstrom, Cem Shaquer, Euljoon Park, Dorin Panescu, Shahrooz Shahparnia, Andre Walker, Ajit Pillai, Mihir Naware
  • Patent number: 8594785
    Abstract: Electrical energy is conveyed via an implanted tissue stimulation system into tissue of the patient over a period of time. Electrical parameter data (e.g., impedance data and/or field potential data) is measured based on the electrical energy conveyed into the tissue of the patient, whereby the electrical parameter data is modulated in response to the physical activity of the patient to generate a time-varying signal (e.g., an oscillating signal). The time-varying signal is analyzed, and the physical activity of the patient (e.g., the physical activity level of the patient or the physical events performed by the patient) is tracking during the time period based on the analyzed time-varying signal.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: November 26, 2013
    Assignee: Boston Scientific Neuromodulation Corporation
    Inventor: Kerry A. Bradley
  • Patent number: 8560076
    Abstract: Systems and methods provide baroreflex activation to treat or reduce pain and/or to cause or enhance sedation or sleep. Methods involve activating the baroreflex system to provide pain reduction, sedation, improved sleep or some combination thereof. Systems include at least one baroreflex activation device, at least one sensor for sensing physiological activity of the patient, and a processor coupled with the baroreflex activation device(s) and the sensor(s) for processing sensed data received from the sensor and for activating the baroreflex activation device. In some embodiments, the system is fully implantable within a patient, such as in an intravascular, extravascular or intramural location.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: October 15, 2013
    Assignee: CVRx, Inc.
    Inventors: Robert S. Kieval, Martin Rossing
  • Publication number: 20130261686
    Abstract: A method for accurately determining timing points for T-wave shocks is particularly useful in a system for determining a cardiac shock strength in an implantable cardioverter defibrillator (ICD. The method involves acquiring at least one first signal, acquiring at least a second signal, comparing the signals, and selecting a timing point with the T-wave of the signal. The first and second signals may be two different aspects of a single electrogram, first and second electrograms, or a combination thereof. Comparison preferably involves signal alignment and qualitative analysis.
    Type: Application
    Filed: April 3, 2012
    Publication date: October 3, 2013
    Inventor: Charles Swerdlow
  • Patent number: 8478414
    Abstract: Systems and methods provide baroreflex activation to treat or reduce pain and/or to cause or enhance sedation or sleep. Methods involve activating the baroreflex system to provide pain reduction, sedation, improved sleep or some combination thereof. Systems include at least one baroreflex activation device, at least one sensor for sensing physiological activity of the patient, and a processor coupled with the baroreflex activation device(s) and the sensor(s) for processing sensed data received from the sensor and for activating the baroreflex activation device. In some embodiments, the system is fully implantable within a patient, such as in an intravascular, extravascular or intramural location.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: July 2, 2013
    Assignee: CVRx, Inc.
    Inventors: Robert S. Kieval, Martin Rossing
  • Patent number: 8478402
    Abstract: A system and method for determining complex intercardiac impedance to detect various cardiac functions are disclosed involving a signal generator means for providing an adjustable direct current signal, a modulator for modulating the adjustable direct current signal to produce a modulated signal, at least one electrode for propagating the modulated signal across a myocardium, at least one sensor for detecting an outputted modulated signal from the myocardium, and at least one circuit to reduce the influence of process noise (aggressors) in the outputted modulated signal. The at least one circuit comprises an amplifier, a demodulator, and an integrator. The amplitude and phase of the final outputted modulated signal indicate the complex impedance of the myocardium. Changes in the complex impedance patterns of the myocardium provide indication of reduced oxygen and blood flow to the myocardium.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: July 2, 2013
    Assignee: Medtronic, Inc.
    Inventors: John D. Wahlstrand, Timothy J. Denison, Wesley A. Santa
  • Publication number: 20130158614
    Abstract: Devices, systems and methods relating to defibrillation and, more specifically, pulse parameters and electrode configurations for reducing patient discomfort are disclosed. Embodiments provide for an implantable defibrillator having an electrode lead system, at least one sensor for sensing a heart condition and emitting a condition signal, a controller in communication with the at least one sensor and configured to determine from the condition signal whether the heart is fibrillating and emitting a command signal if fibrillation is detected and a voltage generator communicating with the controller and the electrode system to communicate at least one defibrillation pulse to the electrode system, wherein the at least one defibrillation pulse includes at least one pulse having a voltage greater than 80 volts and a time duration up to 1000 microseconds.
    Type: Application
    Filed: June 22, 2011
    Publication date: June 20, 2013
    Applicant: SMARTWAVE MEDICAL LTD
    Inventors: Lazaro Salomon Azar, Avi Allon Livnat