News Column

Patent Issued for Implant System Including Guiding Accessory and Methods of Use

July 7, 2014

By a News Reporter-Staff News Editor at Cardiovascular Week -- A patent by the inventors Bonner, Matthew D. (Plymouth, MN); Nikolski, Vladimir P. (Blaine, MN), filed on August 3, 2011, was published online on June 24, 2014, according to news reporting originating from Alexandria, Virginia, by NewsRx correspondents (see also Medtronic, Inc.).

Patent number 8758365 is assigned to Medtronic, Inc. (Minneapolis, MN).

The following quote was obtained by the news editors from the background information supplied by the inventors: "The traditional implantable cardiac pacemaker includes a pulse generator device to which one or more flexible elongate lead wires are coupled. The device is typically implanted in a subcutaneous pocket, remote from the heart, and each of the one or more lead wires extends therefrom to a corresponding electrode, coupled thereto and positioned at a pacing site, either endocardial or epicardial. Mechanical complications and/or MRI compatibility issues, which are sometimes associated with elongate lead wires and well known to those skilled in the art, have motivated the development of cardiac pacing devices that are wholly contained within a relatively compact package for implant in close proximity to the pacing site, for example, within the right ventricle (RV) of the heart. With reference to FIG. 1, such a device 100 is illustrated, wherein pace/sense electrodes 111, 112 are formed on an exterior surface of a shell 101 that hermetically contains a pulse generator including pulse generator electronics and a power source. Shell 101 is preferably formed from a biocompatible and biostable metal such as titanium overlaid with an insulative layer, for example, medical grade polyurethane or silicone, except where electrode 112 is formed as an exposed portion of capsule 101. A hermetic feedthrough assembly (not shown), such as any known to those skilled in the art, couples electrode 111 to the pulse generator contained within shell 101.

"FIG. 1 further illustrates a fixation member 115 mounted to an end of shell 101, in proximity to electrode 111, in order to fix, or secure electrode 111 against the endocardial surface in the apex of the RV. However, in some patients, pacing stimulation may be more effective if delivered to a right atrial site or a left ventricular site. Thus, alternative forms of relatively compact pacing devices have been developed for these alternate implant sites and there is a need for corresponding implant systems and methods."

In addition to the background information obtained for this patent, NewsRx journalists also obtained the inventors' summary information for this patent: "Embodiments and methods of the present invention facilitate the implant of a type of relatively compact therapy delivery device which includes an elongate and flexible isolated conductor extending from a therapy generator of the device. Methods employ a guiding accessory in conjunction with a catheter and guidewire to facilitate passage of the conductor to an implant site, for example, into the cardiac venous system via an ostium of the coronary sinus, when the therapy generator of the device is held within a distal portion of the catheter. The guiding accessory includes a helically extending wall that forms a lumen within which the conductor of the device can extend, when the generator is held within the distal portion of the generator. The catheter includes a lumen, preferably extending alongside the distal portion, for guidewire passage; and the lumen of the guiding accessory also allows passage of the guidewire, alongside the conductor of the device, so that the catheter and guiding accessory, along with the device, may be advanced along the guidewire to an implant site. After advancing the catheter, guiding accessory and device to the implant site, the helically extending wall of the guiding accessory is removed from around the conductor of the device, preferably, by pulling proximally on a tension line, which is attached to a proximal end of the helically extending wall, to draw the wall toward the distal portion of the catheter, thereby unwinding the wall from around the conductor."

URL and more information on this patent, see: Bonner, Matthew D.; Nikolski, Vladimir P.. Implant System Including Guiding Accessory and Methods of Use. U.S. Patent Number 8758365, filed August 3, 2011, and published online on June 24, 2014. Patent URL:

Keywords for this news article include: Therapy, Cardiology, Medtronic Inc..

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Source: Cardiovascular Week

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