ST JUDE MEDICAL AB Patent applications |
Patent application number | Title | Published |
20140257423 | METHOD AND SYSTEM FOR STIMULATING A HEART - The present invention relates generally to implantable medical devices and more particularly to systems and methods for stimulating a heart of a patient. A first ventricle is activated by delivering stimulation to at least one stimulation site, a point of time for arrival at the AV node for at least one depolarization wave resulting from the stimulation in the first ventricle is estimated and a first activation time interval substantially corresponding to the time interval required for at least one depolarization wave to travel from the stimulation site in the first ventricle to the AV node using the estimated point of time for arrival of the depolarization wave and a point of time for delivery of stimulation is computed. Thereafter, the other ventricle is stimulated by delivering stimulation to at least one stimulation site. A point of time for arrival at the AV node for at least one depolarization wave resulting from the stimulation in the other ventricle is then estimated and a second activation time interval substantially corresponding to the time required for at least one depolarization wave to travel from the stimulation site in the other ventricle to the AV node using the estimated arrival of the depolarization wave and the point of time for delivery of stimulation is computed. Based on these activation time intervals and a difference between the intervals, a pacing therapy can be determined, wherein the first ventricle is paced prior to activation of the other ventricle if the activation time difference indicates that the first activation time interval is longer than the second activation time interval and the other ventricle is paced prior to activation of the first ventricle if the activation time difference indicates that the second activation time interval is longer than the first activation time interval. | 09-11-2014 |
20140257070 | PROCESSING OF LAP SIGNALS - Cardiac valve events are monitored by recording a left atrial pressure (LAP) representing signal using an implantable pressure sensor ( | 09-11-2014 |
20140180366 | POWER SAVING COMMUNICATION METHOD FOR AN IMPLANTABLE MEDICAL DEVICE - A non-implantable communication unit conducts wireless communication with an implantable medical device (IMD). The communication unit comprises a request processor for generating power down requests destined to the IMD and triggering temporary power down of the IMD radio equipment. When the communication unit receives a data packet from the IMD or a connected programmer it determines the size of the data packet. A timer processor sets a timer to a value defined based on the determined size. A processor controller selectively controls the operation of request processor to generate or stop generating the power down requests based on a current value of the timer. Power down of the IMD radio equipment is thereby prevented if it is likely that the IMD comprises data to transmit to the communication unit as predicted based on data packet sizes. | 06-26-2014 |
20140180352 | CARDIAC STIMULATING DEVICE - An implantable medical device, IMD, comprises atrial and ventricular sensing units for sensing atrial or ventricular electric events. The IMD also comprises atrial and ventricular pulse generators for generating atrial or ventricular pacing pulses. A controller controls the operation of the IMD ( | 06-26-2014 |
20140170254 | ELASTOMERIC TUBE AND METHOD OF MAKING SAME - In an elastomeric tube and a method for making such a tube, two medical-grade silicone rubber compositions are coaxially coextruded to form a tube. The compositions respectively differ in at least one physical property and respectively have similar curing conditions. The two compositions are blended at an interface formed between the two compositions during the coextruding, so that between 1-99% of the tube forms a blended gradient. The coextruded tube is then cured. | 06-19-2014 |
20140169162 | METHOD AND SYSTEM TO MANAGE REAL-TIME AND NON-REAL-TIME DATA TRANSMISSION OVER A SHARED LINK WITH AN IMD - A medical telemetry system and method are provided for communication between an implantable medical device (IMD) and an external device (ExD). The method and system collects real-time (RT) data and non-real-time (NRT) data. The method and system segment the RT data into RT packets and the NRT data into NRT packets and load the RT and NRT packets into a shared transmit buffer in the IMD in accordance with RT and NRT bandwidth allocations and/or packet size. The method and system transmit the RT and NRT packets from the IMD to the ExD in an order loaded in the transmit buffer and adjust at least one of the RT and NRT bandwidth allocations and/or packet size based on a quality of service (QoS) characteristic. | 06-19-2014 |
20140094706 | MEDICAL DEVICE FOR POSITIONING OF A LEAD - The present invention relates generally to medical devices for electrode positioning during implantation procedures. A cardiac signal measuring device measures cardiac signals sensitive to inherent differences between cardiac tissue and blood using at least one electrode of a medical lead arranged at a distal tip of the medical lead and at least a second electrode arranged at a distance from the distal electrode and being connectable to the measuring unit. An analyzing module acquires cardiac signals measured during predetermined measurement sessions. The analyzing module determines at least one cardiac signal value based on the cardiac signals for each measurement session and analyzes changes of the cardiac signal values between different measurement sessions to determine a position of the electrode relative a tissue border. A maximum of the change of the cardiac signal values between two successive measurement sessions indicates that the electrode has reached the tissue border. | 04-03-2014 |
20140041220 | MEDICAL IMPLANTABLE LEAD AND METHOD FOR MANUFACTURING OF SUCH A LEAD - A medical implantable lead has a header in a distal end, a fixation arrangement and an electrode arranged in the header. The lead also has a connector in a proximal end that includes a connector pin and is adapted to be connected to a monitoring and/or controlling device, and an inner coil, which extends inside an outer casing of the lead and is adapted to transmit electrical signals between the monitoring and/or controlling device and the electrode. The inner coil is attached to the connector pin. The inner coil extends through a bore inside the connector pin and is attached to the connector pin in its proximal end. A method for manufacturing such a lead is also provided. | 02-13-2014 |
20140018893 | IMPLANTABLE DEVICE WITH IMPROVED SURFACE CHARACTERISTICS - An implantable device ( | 01-16-2014 |
20140018892 | IMPLANTABLE MEDICAL LEAD - An implantable medical lead comprises an outer lead package with an outer insulating tubing and a lead header having a window in its lateral surface. An inner lead package is at least partly arranged in lumens of the outer insulating tubing and the lead header and comprises a helical fixation element connected to a connector pin by an inner conductor coil, and a ring electrode connected to a connector ring by an outer conductor coil. An inner insulating tubing is coaxially arranged between the inner and outer conductor coils. The inner lead package is rotatable relative to the outer lead package and the ring electrode is configured to be at least partly exposed through the window. | 01-16-2014 |
20140012359 | MEDICAL IMPLANTABLE LEAD - The invention relates to a medical implantable lead for monitoring and/or controlling an organ inside a human or animal body. The lead comprises a first electrode ( | 01-09-2014 |
20130345582 | IMPLANTABLE HEART MONITORING DEVICE AND METHOD - In an implantable heart monitoring device and method, particularly for monitoring diastolic dysfunction, a control circuit (a) detects the heart rate, (b) derives information correlated to the stroke volume of the heart at the detected heart rate, and (c) stores the detected heart rate and the derived information correlated to the stroke volume in a memory. The control circuit automatically implements (a), (b) and (c) at a number of different occasions for a number of different, naturally varying heart rates, so that the memory contains information indicating the stroke volume as a function of the heart rate. | 12-26-2013 |
20130339677 | MULTIPLY-AND-ACCUMULATE OPERATION IN AN IMPLANTABLE MICROCONTROLLER - The invention provides microprocessor extensions for cooperating with a sequential arithmetic-logic unit (ALU) to execute a multiply-and-accumulate operation (MAc). The ALU performs a continuous sequence of accumulation instructions synchronously with a clock signal (CLK1). Buffers (BUF1, BUF2) store input data which are fed to a combinatorial multiplier (MULT) by first buses (L | 12-19-2013 |
20130325359 | HEMODYNAMIC STATUS ASSESSMENT - A patient-specific hemodyanmic status model is determined from impedance data collected during periods of normal and abnormal hemodynamic status by deriving parameter values of a set of multiple impedance-derivable parameters from impedance signals collected during periods of normal hemodynamic status and in connection with periods of abnormal hemodynamic status. The parameter values are employed to estimate coefficients of a linear parametric status model. These coefficients can then be used together with parameter values determined from impedance signals determined during status assessment periods in order to determine a current hemdoynamic status of the patient. | 12-05-2013 |
20130289641 | METHOD AND SYSTEM FOR OPTIMIZING CARDIAC PACING SETTINGS - The present invention relates generally to methods and systems for optimizing stimulation of a heart of a patient. Hemodynamical index signals reflecting a mechanical functioning of a heart of a patient are recorded at different hemodynamical states. Corresponding hemodynamical reference signals at corresponding hemodynamical states are recorded. At least one hemodynamical index parameter is extracted from the recorded hemodynamical index signals. The at least one hemodynamical index parameter is a measure of the mechanical functioning of the heart and a hemodynamical index model is created, wherein the hemodynamical index model is based on the at least one hemodynamical index parameter and a comparison between output results from the hemodynamical index model and corresponding hemodynamical reference signals. From this hemodynamical index model, a hemodynamical index can be derived, which then can be used in determining patient customized cardiac pacing settings of the cardiac stimulator. | 10-31-2013 |
20130245732 | LEAD HEADER AND MANUFACTURE THEREOF - A lead header for an implantable medical lead is in the form of a metal sheet bent to form a metal tube having a lumen. The metal sheet has a protruding portion that extends radially inwardly into the lumen. The protruding portion may be lip arranged in connection with one of the longitudinal sides of the metal sheet that is bent to protrude radially inwardly into the lumen, or it may be a dent formed in the metal sheet. In either case, the protruding portion is configured to transform a rotation of a helical fixation element of the medial lead that is at least partly present in the lumen into a longitudinal movement of the helical fixation element relative to the lead header. | 09-19-2013 |
20130245621 | ABLATION STENT AND METHOD OF USING AN ABLATION STENT - Hypertension is treated in a patient by implanting an ablation stent in a renal artery of the patient. Energy is transmitted to the ablation stent to induce heating of the ablation stent, which causes ablation of a renal sympathetic nerve present on the outside of the portion of the renal artery comprising the ablation stent. A preferred ablation stent is in the form of an N-turn coil of an electrically conductive wire forming a meander structure. The respective ends of the wire are electrically connected to each other. | 09-19-2013 |
20130238045 | METHODS AND SYSTEMS FOR STIMULATING A HEART - The present invention relates generally to methods for implantable medical devices and more particularly to methods for optimizing stimulation of a heart of a patient. The method comprises: determining recommended pacing settings including recommended AV delays and/or recommended W delays based on IEGM data. Further, at least one hemodynamical parameter is determined based on measured at least one hemodynamical signal. Reference pacing settings are determined including reference AV delays and/or reference W delays based on said hemodynamical parameters. An AV delay correction value and a W delay correction value are calculated as a difference between recommended AV and/or VV delays and reference AV and/or W delays, respectively. The correction values are used for updating recommended AV and/or VV delays, respectively. | 09-12-2013 |
20130225947 | IMPLANTABLE MEDICAL DEVICE - An implantable medical device comprising a coronary perfusion measurement unit is adapted to measure and determine parameters related to coronary perfusion of heart tissue. The parameters include time periods and perfusion magnitudes. The coronary perfusion measurement unit is configured to determine a time period T related to a perfusion event of a coronary vessel and including includes a reperfusion time period, where a perfusion event is defined as a decrease of coronary perfusion followed by reperfusion, and to generate a time period signal in dependence thereto. The implantable medical device further comprises a coronary flow calculation unit that is adapted to receive the time period signal and that is adapted to process the time period and to generate an ischemia risk indicating index I in dependence of the time period. | 08-29-2013 |
20130211472 | CARDIAC RESYNCHRONIZATION THERAPY OPTIMIZATION - An implantable medical device, IMD, ( | 08-15-2013 |
20130184550 | MRI-COMPATIBLE IMPLANTABLE MEDICAL LEAD - An implantable medical lead ( | 07-18-2013 |
20130158620 | METHOD AND SYSTEM FOR STIMULATING A HEART OF A PATIENT - In an implantable medical device and a method for stimulating a heart of a patient, at least one left atrial pressure (LAP) signal over a cardiac cycle is obtained. The A-wave is identified using the LAP signal and a maximum positive rate of change of the A-wave of the LAP signal is determined. The maximum positive rate of change of the A-wave corresponds to the rate which the pressure in the atrium raises as the atria contraction forces more blood into the ventricle during the very last stage of diastole. Further, AV and/or VV delay is adjusted in response to the maximum positive rate of change of the A-wave, wherein a reduction of the maximum positive rate of change of the A-wave indicates an AV and/or VV delay providing an enhanced hemodynamic performance. | 06-20-2013 |
20130156933 | METHOD FOR MANUFACTURING AN ACTIVE FIXATION ELECTRODE - The present invention relates to methods for manufacturing active fixation helices for the stimulation and/or sensing of organs. A first embodiment of a method in accordance with the present invention for making a helix comprises a first step of producing an elongated helix precursor body comprising one or more electrical conductors surrounded by an insulating material. This helix precursor body is then shaped into a helix, material removed in predetermined places in order to expose the areas of the conductors which will be used as electrodes in the final product. The body is coated with an electrically conducting biocompatible coating which is subsequently partly removed in continuous loops from around the electrodes in order to electrically insulate them from each other and to ensure that the electrically active areas of the electrodes are of the correct dimensions. | 06-20-2013 |
20130138171 | ACTIVITY-RESPONSIVE PACING - An implantable medical device is connectable to or comprises an activity sensor and determines a current activity level of a subject based on a sensor signal from the activity sensor. A time period during which the current activity level of the subject has exceeded a threshold level is also determined. A pulse generator controller controls a pulse generator to generate pacing pulses to be applied to the subject's heart at a pacing rate that is determined based on the current activity level and the length of the time period of activity at a level exceeding the threshold level. | 05-30-2013 |
20130110187 | ISCHEMIA DETECTION | 05-02-2013 |
20130102858 | IMPLANTABLE SENSOR DEVICE AND SYSTEM - The implantable medical device for measuring pressure is disclosed. The implantable medical device is connectable to a medical lead and comprises an outer sheath and a helically shaped needle arranged at the outer sheath. A pressure sensing body having a distal part is movably arranged in the outer sheath. The pressure sensing body is arranged such that the distal part is located within the outer sheath in an initial state of the pressure sensing body, wherein the pressure sensing body is arranged to be advanced from the initial state to protrude from the outer sheath and such that it is at least partially surrounded by the helically shaped needle; and a pressure sensor arranged at or adjacent to the distal part of the pressure sensing body for sensing pressure. | 04-25-2013 |
20130060118 | IMPLANTABLE MEDICAL DEVICE AND METHOD COMPRISING MEANS FOR DETECTING AND CLASSIFYING AN ARRHYTHMIA - An implantable medical device ( | 03-07-2013 |
20130053917 | PHYSIOLOGICALLY ADAPTED CARDIAC RESYNCHRONIZATION THERAPY - An implantable medical device is connectable to an epicardial left ventricular lead having at least one epicardial electrode and a myocardium penetrating catheter with at least one endocardial electrode and present in a lumen of the lead. The device comprises a pulse generator controller that controls a ventricular pulse generator to generate pulses to be applied to the epicardial and endocardial electrodes. The controller uses an endocardial-to-epicardial time interval or epicardial-to-endocardial time interval to coordinate endocardial and epicardial activation of the left ventricle to thereby achieve cardiac pacing that closely mimics the natural electrical activation pattern of a healthy heart. | 02-28-2013 |
20130053915 | METHOD AND SYSTEM FOR DETERMINING PACING SETTINGS - Systems and methods for optimizing the stimulation of a heart of a patient are disclosed herein. The method comprises delivering pacing therapy to the patient according to a pacing therapy setting schedule, using specific pacing intervals via specific electrode configurations. Further, sinus rate values are recorded over at least one cardiac cycle at each pacing therapy setting and it is determined whether a sinus rate value satisfies predetermined measurement conditions, wherein sinus rate values are used for trending the sinus rate over time if the measurement conditions are satisfied. The accepted sinus rate values, i.e. values that satisfy the measurement conditions, are trended over time, wherein each trended sinus rate value is created based on recordings from at least one cardiac cycle. A preferred pacing therapy setting is determined to be the pacing therapy setting that provides a lowest sinus rate. | 02-28-2013 |
20130046194 | Arrhythmia Classification - An implantable medical device ( | 02-21-2013 |
20130023947 | Implantable Heart Stimulator - Implantable heart stimulator comprising a control unit including a memory, a sensing unit, a pulse stimulation unit adapted to generate stimulation pulses separated by a variable predetermined pacing interval (PI), and also a method in a heart stimulator. The heart stimulator is adapted to be connected to one or many heart electrode leads provided with stimulating and sensing electrodes in order to stimulate heart tissue by said stimulation pulses and sense electrical heart events. The heart stimulator comprises a control parameter measurement unit adapted to derive a control parameter value indicative of end-diastolic pressure (EDP). At specified intervals, the control unit is adapted to vary the predetermined pacing interval (PI) according to a predetermined pacing interval (PI) search session scheme, and that control parameter values are determined, by said control parameter measurement unit at the different pacing intervals tested during said PI search session, and in that determined control parameter values and corresponding pacing intervals are stored in said memory. The maximum control parameter value obtained during one PI search session is determined and the corresponding pacing interval, denoted PI | 01-24-2013 |
20130023779 | Method and System for Ischemia Detection - Disclosed herein are systems and methods for automatically determining ST windows for ischemia detection. In one example, an R-wave is identified in a signal derived from an IEGM and the derivative signal data following the identified R-wave is analyzed so as to find portions of the derivative signal comprising samples having lower values than a predetermined threshold. Further, a portion of the derivative signal including samples having lower values than the threshold is determined to correspond to a ST window for that cardiac cycle if that portion fulfills predetermined requirements. A reference ST window based on a number of determined ST windows is determined. Using the reference ST window, ischemia can be detected by comparing IEGM data in the reference ST window with current IEGM data from a segment of the IEGM signal corresponding to the reference ST window. | 01-24-2013 |
20130013011 | IMPLANTABLE MEDICAL DEVICE FOR PULSE GENERATION AND WITH MEANS FOR COLLECTING AND STORING ENERGY DURING A RECHARGE PHASE - A pulse generating implantable medical device comprises a power source , a control unit, a plurality of switching units, a timing unit, a pulse generating unit adapted to generate one or more stimulation pulses to be applied to human or animal tissue via one or more stimulation electrodes, and a coupling capacitor in series with each stimulation electrode. A stimulation pulse is adapted to be applied during a stimulation pulse timing cycle that includes a stimulation phase and a recharge phase, and that the timing of a stimulation pulse timing cycle is controlled by the control unit via the timing unit and the switching units. The implantable medical device further comprises an energy storage unit and that, during the recharge phase, one or more of the switching units is adapted to establish electrical connection between the one or many stimulation electrodes and the energy storage unit in order to collect and store energy from applied stimulation pulses. | 01-10-2013 |
20120324728 | METHOD OF PRODUCING A PROXIMAL CONNECTOR END OF AN IMPLANTABLE LEAD - A connector for an implantable medical lead that is electrically and mechanically connectable to an implantable medical device, has a connector pin made of a first conducting material. A tubular insulator made of an insulating material concentrically surrounds at least a portion of the pin. A connector ring made of a second conducting material is concentrically positioned around at least a portion of the insulator. The insulator is connected to the connector ring by spark plasma sintering in the case of an active fixation lead, and is connected to the ring and the pin by spark plasma sintering in the case of a passive fixation lead. | 12-27-2012 |
20120310296 | DETERMINATION OF CARDIAC RESYNCHRONIZATION THERAPY SETTINGS - CRT settings for an implantable medical device are determined by applying pacing pulses to heart chambers of a scheme of different combinations of interchamber delays. A respective width parameter value representing an R or P wave width is determined for each such delay combination based on an ECG representing signal and the width parameter values are employed to estimate a parametric model defining the width parameter as a function of interchamber delays. Candidate interchamber delays that minimize the width parameter are determined from the parametric model and employed to determine optimal CRT settings. The technique provides an efficient way of finding optimal CRT settings when multiple pacing sites are available in a heart chamber. | 12-06-2012 |
20120290060 | METHOD OF PRODUCING A PROXIMAL CONNECTOR END OF AN IMPLANTABLE LEAD - A connector for an implantable medical lead that is electrically and mechanically connectable to an implantable medical device, has a connector pin made of a first conducting material. A tubular insulator made of an insulating material concentrically surrounds at least a portion of the pin. A connector ring made of a second conducting material is concentrically positioned around at least a portion of the insulator. The insulator is connected to the connector ring by spark plasma sintering in the case of an active fixation lead, and is connected to the ring and the pin by spark plasma sintering in the case of a passive fixation lead. | 11-15-2012 |
20120290031 | MEDICAL IMPLANTABLE LEAD - The invention relates to a medical implantable lead for monitoring and/or controlling an organ inside a human or animal body. The lead comprises a conducting arrangement having a first conducting coil of at least one electrically conducting wire for connecting a first electrode electrically to a connector to receive and/or transmit electric signals from and to the tissue, respectively. The lead is tapered in a distal portion and has a smaller cross sectional dimension at the distal portion than at the rest of the lead. The first conducting coil is terminated at a termination point on a distance from the distal end. The conducting arrangement has a first end conductor in the form of a non-coiled electric conductor or an eccentrically positioned small diameter coil which connects the first electrode electrically with the coil. | 11-15-2012 |
20120289807 | PIEZOELECTRIC FILM - A method for producing a biocompatible material of the formula Na | 11-15-2012 |
20120282451 | PIEZOELECTRIC FILM - A method for producing a biocompatible material of the formula Na | 11-08-2012 |
20120276279 | PIEZOELECTRIC FILM - A method for producing a biocompatible material of the formula Na | 11-01-2012 |
20120271373 | METHOD AND DEVICE FOR DETECTING NOISE - The present invention generally relates to implantable medical devices, such as pacemakers, and, in particular, to a method and an implantable medical device capable of detecting the presence of noise caused by external noise sources. Voltages and/or impedances are measured over one or several electrode configurations. Based on the measured voltages and/or impedances, noise parameters are calculated, which are compared with reference values to detect the presence of noise. In another aspect of the invention, at least two different electrode configurations with different noise pick-up areas are used in the measurement. Relations between the noise parameters of the at least two vectors are calculated and compared with reference relations to detect the presence of noise. | 10-25-2012 |
20120259234 | METHOD AND DEVICE FOR DETECTING INCIPIENT A-V NODE MALFUNCTION - The present invention generally relates to implantable stimulation devices, such as pacemakers, defibrillators, and cardioverters, and, in particular, to implantable medical devices using atrial based pacing such as an AAI pacing mode and methods for such implantable medical devices for detecting early stages of incipient A-V node malfunction as well as presence of A-V node malfunction. An AV conduction capacity is detected, wherein a sensed ventricular event following an intrinsic or paced atrial event during a predetermined period of time indicates good AV conduction capacity and wherein absence of a ventricular event within the predetermined period of time indicates poor AV conduction capacity. At least one A-V node function parameter indicating a function of the A-V node is determined, wherein the A-V node function parameter includes whether a status of the AV conduction capacity is good or poor. Incipient A-V node malfunction is detected where poor AV conduction capacity indicates incipient A-V node malfunction. | 10-11-2012 |
20120245650 | CARDIAC STIMULATING DEVICE - An implantable medical device, IMD, comprises atrial and ventricular sensing units for sensing atrial or ventricular electric events. The IMD also comprises atrial and ventricular pulse generators for generating atrial or ventricular pacing pulses. The ventricular sensing unit is connectable to a multi-electrode lead to individually sense electric events in a ventricle using multiple electrode pairs implanted at different ventricular sites. A controller blanks the ventricular sensing unit during a blanking period following delivery of an atrial stimulating pulse by the atrial pulse generator and activates the ventricular sensing unit at the expiry of the blanking period. Due to the lower propagation speed of PVC depolarization waves and the multi-site sensing, a PVC depolarization wave initiated at a ventricular site during the blanking period can be detected by the IMD. | 09-27-2012 |
20120239102 | IMPLANTABLE MEDICAL DEVICE FOR CARDIAC THERAPY - An implantable medical device, IMD, ( | 09-20-2012 |
20120232632 | MEDICAL IMPLANTABLE LEAD - The present invention relates to a medical implantable lead having a coaxial structure, where an insulating tube arranged between an inner coil and an outer coil is provided with a periodically alternating capacitance along the length thereof in order to reduce lead tip heating during MRI scanning. | 09-13-2012 |
20120232608 | CARDIAC STIMULATING DEVICE - An implantable medical device, IMD, comprises atrial and ventricular sensing units for sensing atrial or ventricular electric events. The IMD also comprises atrial and ventricular pulse generators for generating atrial or ventricular pacing pulses. A controller controls the operation of the IMD ( | 09-13-2012 |
20120232373 | MEDICAL IMPLANATBLE LEAD WITH FIXATION DETECTION - The invention relates to a medical implantable lead of the kind being adapted to be implanted into a human or animal body for monitoring and/or controlling of an organ inside the body. The lead comprises in a distal end a tubular header ( | 09-13-2012 |
20120229299 | METHODS FOR LOW POWER COMMUNICATION IN AN IMPLANTABLE MEDICAL DEVICE - The present invention is directed to an implantable medical device and a method for power management for power efficient use of RF telemetry during, for example, conditions where long periods of continuous monitoring of the device and the patient is desired such as during MRI procedures. A protocol module adapted to, at receipt of a low power protocol indication, activate and use a low power protocol for communication between the device and external units. The protocol module is capable of switching between different communication protocols including a low power communication protocol and a default RF communication protocol depending on, for example, whether continuous long-term monitoring of the patient is performed. During the low power communication protocol, the protocol module is adapted to select parts of stored electrophysical and/or hemodynamical signal waveforms for telemetric transmission and to create communication packages having a predetermined length using the selected parts of the electrophysiological and/or hemodynamical signal waveform. Further, a transmitter is instructed to transmit the communication packages at predetermined transmission intervals and the telemetry module is instructed to power down the transmitter or set the transmitter in a lowest possible activation state during intermediate periods between the transmission intervals. | 09-13-2012 |
20120221086 | MRI-COMPATIBLE IMPLANTABLE MEDICAL LEAD - An MRI-compatible implantable medical lead includes two electrodes coupled to a distal end of the lead, two matching electrode terminals coupled to a proximal end and a lead body in the form of an outer insulating tubing running from the distal end to the proximal end. A coaxial conductor assembly is arranged in a bore of the outer insulating tubing and comprises an inner conductor, an outer conductor and an inner insulating tubing arranged between the inner and outer conductors. A capacitor is arranged between the inner conductor and the outer conductor at a distance from the distal end defined based on the magnetic field strength of the MRI system with which the lead is compatible. | 08-30-2012 |
20120221085 | ACTIVE FIXATION IMPLANTABLE MEDICAL LEAD - An implantable medical lead has a distal lead portion with a tubular header and a fixation helix provided in a lumen of the tubular header. The fixation helix is connected to a shaft attached to a conductor coil. A tubular coupling is connected to the tubular header and is coaxially arranged relative the shaft, with the shaft in its lumen. Rotation of the conductor coil causes rotation of the shaft and the fixation helix and longitudinal movement of the fixation helix out of the implantable medical lead by a rotation-to-translation transforming element. A friction device is arranged between the shaft and the tubular coupling or between the tubular header to oppose rotation of the shaft relative the tubular header and the tubular coupling. | 08-30-2012 |
20120221067 | IMPLANTABLE MEDICAL DEVICE POWER SAVING COMMUNICATION - A non-implantable communication unit ( | 08-30-2012 |
20120185013 | Heart Stimulating Device with Selecting Optimal Electrode Configuration - Heart stimulating device comprising a stimulation pulse generator arranged in a stimulator housing, where the heart stimulating device is coupled to a plurality of stimulation and sensing electrodes arranged at one or many leads, the electrodes being adapted to be arranged in connection with the heart to stimulate the heart. The device further comprises a sensing unit adapted to sense electrical heart tissue responses to applied electrical stimulation pulses via said electrodes. The pulse generator is adapted to generate stimulation pulses to be applied to the heart tissue by different electrodes, and for each of the applied pulses resulting in a depolarization wave in the heart tissue a depolarization wave velocity parameter of the wave is determined by the sensing unit and stored in a memory unit. The stored wave velocity parameters, related to different stimulating electrodes, are compared to each other in a comparison unit and the comparison is used to adapt a stimulation mode when stimulating the heart to optimize the hemodynamic performance of the heart. | 07-19-2012 |
20120184866 | IMPLANTABLE MEDICAL DEVICE AND METHOD FOR MULTISITE MEASUREMENT OF INTRACARDIAC IMPEDANCE - The present invention generally relates to an implantable medical device and method for detecting and monitoring cardiac status of a patient using simultaneous multisite measurements of the intracardiac impedance and in particular to ischemia detection using the simultaneous multisite measurements. The device comprises an impedance measuring unit being connectable to a plurality of electrode configurations including a current generating device adapted to generate a current and apply the current between two electrodes of a current injecting electrode configuration of the electrode configurations and a voltage sensing device including a plurality of voltage sensing circuits arranged in parallel. Each voltage sensing circuit being connectable to a specific voltage sensing electrode configuration of the electrode configurations and being arranged to sense a voltage over the voltage sensing electrode configuration resulting from the applied current, wherein the voltage sensing circuits are capable of sensing the resulting voltages simultaneously. The device further comprises an impedance calculating module adapted to calculate a plurality of impedance values, each impedance value being based on the applied current and a resulting voltage. | 07-19-2012 |
20120182917 | IMPLANTABLE MEDICAL DEVICE COMMUNICATION - An implantable medical device, IMD, tags data packets transmitted to a non-implantable communication unit with notifications indicating whether the IMD has additional data that needs to be transmitted to the communication unit. The notifications are used by the communication unit to achieve a conditional generation and transmission of power down requests that urges the IMD to power down its radio equipment. The total length of the communication session can thereby be reduced as power down requests are not transmitted when the IMD has additional data to transmit. | 07-19-2012 |
20120157861 | DEVICES AND METHOD FOR DETERMINING AND MONITORING A CARDIAC STATUS OF A PATIENT BY USING PLVDT OR PLVST PARAMETERS - The present invention relates to an improved medical device and method for accurately and reliably determining a cardiac status of a patient. An implantable medical device, IMD, comprises a sensor arrangement adapted to sense signals related to mechanical activity of the heart and an activity level sensor arrangement adapted to sense an activity level of the patient. Further, the IMD calculates a percentage of left ventricular diastolic time (PLVDT) for a cardiac cycle corresponding to a relation between a diastolic time interval and a cardiac cycle time interval using the determined systolic and diastolic time intervals or a percentage of left ventricular systolic time (PLVST) for a cardiac cycle corresponding to a relation between a systolic interval time interval and a cardiac cycle time interval. A cardiac status is determined based on the calculated PLVDT (or PLVST) and on an activity level of the patient. | 06-21-2012 |
20110264179 | MEDICAL IMPLANTABLE LEAD AND A METHOD FOR ENSURING PROPER AND SAFE ATTACHMENT OF SUCH A LEAD TO AN ORGAN - A medical implantable lead of the kind being adapted to be implanted into a human or animal body for monitoring and/or controlling of an organ inside the body has a penetrating fixation element in a distal end, which is adapted to penetrate into the tissue of the organ to fixate the lead such that a distal end of the lead will be in contact with the organ. The lead also has an electrode member to receive and/or transmit electrical signals from and/or to the organ. The lead has in a distal portion a movable member, which is displaceable in an axial direction of the lead and is actuated by a resilient member to be, in an initial state, maximally protruded in a distal direction in relation to the lead and which comprises a radiopaque material for forming of a first indication marker. The lead also has a second indication marker of a radiopaque material in relation to which the movable member is displaceable, and the first and the second indication markers are arranged such that, when observing the lead in an implanted state by means of fluoroscopy, it will be recognizable from the relative positions of the first and second indication markers, whether the distal end of the lead is in close contact with the surface of the tissue or not. A comparable method ensures proper and safe attachment of a medical implantable lead to an organ. | 10-27-2011 |
20110112419 | IMPLANTABLE MEDICAL DEVICE AND METHOD FOR CLASSIFYING ARRHYTHMIA EVENTS - In an implantable medical device such as an implantable cardiac defibrillator, and a method for classifying arrhythmia events, IEGM signals are analyzed to detect an arrhythmia event and a respiratory pattern of the patient is sensed. At least one respiratory parameter reflecting characteristics of the respiratory pattern of the patient is determined based on the sensed respiratory pattern and a respiratory measure corresponding to a change of a rate of change of the at least one respiratory parameter is calculated. The detected arrhythmia event is classified based on the respiratory measure and the IEGM signals, wherein arrhythmia events that satisfy at least a first criterion is classified as an arrhythmia event requiring therapy. | 05-12-2011 |
20110009938 | IMPLANTABLE MEDICAL LEAD AND METHOD FOR MANUFACTURE THEREOF - An implantable medical lead for implantation in a patient which has at least one electrical conductor connected to at least one electrode and/or sensor of said lead. The at least one conductor is arranged within a continuous sheet of a polymer material. A distal portion of the lead is adapted to be located in or at a heart of said patient and a proximal portion of said lead is connectable to an implantable medical device and arranged such that, when connected to the device, at least a part of the proximal portion of the sheet is placed in close proximity to said medical device. At least the proximal portion of the polymer sheet material is processed in at least a first heat process stage such that an inherent resistance to wear of the polymer sheet material is substantially maintained, and the distal portion of said polymer sheet material is processed in at least a second heat process stage in which a polymer morphology of said polymer material is altered such that an inherent flexibility of the polymer sheet material is substantially increased. | 01-13-2011 |
20100286535 | MEDICAL DEVICE FOR DETECTING PULMONARY ARTERY PRESSURE - In a medical device and method to monitor pulmonary artery pressure of a patient, a first parameter related to the right ventricular straight volume of the patient's is detected, and a second parameter related to the right ventricular ejection rate of the patient's heart, or related to the workload of the patient's heart, is also determined. A pulmonary pressure index is determined by combining the first and second parameters, with variations of the pulmonary pressure index indicating variations in the pulmonary artery pressure. Pulmonary artery hypertension can be monitored with such a device and method. | 11-11-2010 |
20100114274 | SURFACE MODIFICATION OF IMPLANTABLE ARTICLE - An implantable elastomeric article having modified surface characteristics on at least one surface obtained by application of an acid on said at least one surface and after a predetermined treatment time removing the acid by rinsing. The treatment gives the surface an increased roughness that decreases the friction against another object. A method of modifying surface characteristics of at least one surface on an implantable elastomeric article, comprising application of an acid, followed by rinsing. A method of assembly of an implantable electrode lead made of silicone tubing and a spiral conductor, comprising treating the tubing with an acid before inserting the conductor into the tubing. | 05-06-2010 |
20100113961 | MEDICAL DEVICE FOR DETERMINING THE POSTURE OF PATIENT - The present invention relates to a method for determining the posture of a patient. The method comprises the steps of: initiating ( | 05-06-2010 |
20100013668 | METHOD IN A MEDICAL TELEMETRY SYSTEM AND MEDICAL TELEMETRY SYSTEM - In a method and a medical telemetry system for communication between an external monitoring device and an implantable medical device of the medical telemetry system at a transmitting end, an implantable medical device frame layer packet is segmented into one or more data blocks of a radio packet. The data blocks are transmitted in the communication between the external monitoring device and the implantable medical device. A start of the implantable medical device is indicated in the frame layer packet by including in a first data block of the radio packet a segmentation and reassembly indicator having a first value. At the transmitting end, the data blocks are transmitted over a short-range medical radio link. At the receiving end, the data blocks are reassembled into the originally transmitted implantable medical device frame layer packet. | 01-21-2010 |
20100010558 | IMPLANTABLE MEDICAL DEVICE WITH LEAD FAILURE DETECTION - An implantable heart stimulating device has an ECG sensing unit to receive heart potential signals from sensing electrodes at an electrode lead arranged in connection with a patient's heart. The ECG sensing unit is provided with a programmable make-break threshold. The device further has a timer adapted to generate a make-break detection period, and a counter. The counter is adapted to count the number of times that the amplitude of the heart potential signal exceeds the programmable make-break threshold during the make-break detection period. When the number of times is higher than a predetermined value, the ECG obtained during the make-break detection period is stored in an ECG storage unit. | 01-14-2010 |
20090292346 | Porous Niobium Oxide as Electrode Material and Manufacturing Process - An implantable medical electrode has an electrically conductive core covered by a stable biocompatible oxide layer. The core contains niobium and the oxide contains a porous niobium oxide. In a process for producing such an implantable electrode, a core of metal or metal alloy containing niobium is connected as an anode in an electrolyte and is subjected to high potential anodic pulses. | 11-26-2009 |
20090254139 | IMPLANTABLE MEDICAL DEVICE WITH OPTIMIZATION PROCEDURE - In an implantable medical device and a method for the operation thereof, acoustic energy is sensed in a subject in whom the device is implanted, and signals indicative of heart sounds of the heart of the patient are produced over predetermined periods of a cardiac cycle, during successive cardiac cycles. A signal corresponding to the second heart sound (S | 10-08-2009 |
20090132282 | MEDICAL DATA MANAGEMENT - For exchanging medical data in a healthcare system having multiple patient domains, with at least one of these domains being isolated from the other domains by virtue of a patient identifier for the other domains not having access to patient identifiers used by the isolated domain, patient-related data for a given patient are provided and are sent to this manager. The manager compares the data with stored data to identify an identifier of the given patient utilized by one of the other domains. This identifier is returned to the isolated domain, wherein it is employed for enabling an association of locally or externally generated medical data of the patient with an externally or locally utilized identifier of the patient with an externally or locally utilized identifier of the patient. The isolated domain may utilize model and serial numbers of implantable medical devices as the patient identifiers. | 05-21-2009 |
20090132007 | Voltage Protection Circuits For Implantable Medical Devices - An implantable medical device has an electronic circuit and a telemetry circuit both connected to a common ground, and at least one RF telemetry antenna that is formed by a number of parts of the implantable device that are capable of functioning as an antenna. When implanted, these parts are in contact with tissue. For voltage protection, the RF antenna circuit is connected to the parts of the RF telemetry antenna via at least one capacitor. The capacitor is dimensioned to withstand a voltage amplitude of a pulse that would be capable of modifying the state of, or destroying, any component in the RF telemetry circuit or the electronic circuit. | 05-21-2009 |
20090099614 | Method and Implantable Medical Device for Classifying Sensor Signals - In a method and an apparatus for creating hemodynamic sensor signal templates using an implantable medical device connectable to a patient heart activity of the patient is sensed in order to identify a paste or sensed sequence of events of a heart cycle. Hemodynamic sensor signals for consecutive heart cycles are sensed and the sensed hemodynamic sensor signals for consecutive heart cycles are stored. The sensed sensor signals are classified dependent on at least one predetermined heart event sequence condition. A template may be created using the classified sensor signals. | 04-16-2009 |
20080234694 | Tool and a Method for Attaching a Cardiac Stimulator Lead at a Desired Position Inside a Heart - For attaching a cardiac stimulator lead at a desired position inside a heart, the stimulator lead having a flexible tube from which a helix is extendible at a distal end thereof by a screw rotating motion and having a proximal end interconnected with an operating member, a tool has a flexible portion wire with an engagement formation at a distal end thereof that mates with a complimentary engagement formation at a proximal end of the operating member. The tool has a handle containing an internal cavity, with a proximal portion of the torsion wire being rotationally rotated by the handle in the internal cavity, and a resilient yoke is formed in the internal cavity, with at least a part of the yoke engaging grooves and ridges in a circumferential boundary surface of the internal cavity. | 09-25-2008 |