 Capacitor with thermosealed polymeric case for implantable medical device |
| The disclosed embodiment overcomes the limitations of the prior art by providing an electrolytic ... |
|
| Apparatus for removing an insulating layer from a portion of a conductor |
| Oour invention relates to an apparatus and technique for stripping an insulating coating from a ... |
|
| Capacitor structures |
| Integrated circuitry capacitors and methods of forming the same are described. In accordance with ... |
|
| High-energy capacitors for implantable defibrillators |
| To address these and other needs, the present inventors devised a new foil structure which combines ... |
|
| System and method for detection of pacing pulses within ECG signals |
| It is a primary object of the present invention to provide a system and method for detecting pacing ... |
|
| Method for interconnecting anodes and cathodes in a flat capacitor |
| The following detailed description, which references and incorporates the figures, describes and ... |
|
|
Extractable implantable medical lead
| Details |
Inventors: Marshall, Mark T.;
Assignee: Medtronic, Inc. (Minneapolis, MN)
Primary Examiner: Jastrzab; Jeffrey R.
Assistant Examiner: Evanisko; George R.
Attorney, Agent or Firm: Duthler; Reed A., Patton; Harold R.
A medical electrical lead with a tip-ring assembly optimized to resist damage during extraction. The lead includes an elongated plastic tube and at least two elongated conductors mounted in the plastic tube. A tip-ring assembly is mounted to the distal end of the tube, the tip-ring assembly including a ring electrode coupled to one of the conductors, a tip electrode located distal to the ring electrode and coupled to another of the conductors and two molded plastic components separately fabricated of a plastic harder than the plastic tube, adhered to one another and together defining a circumferential groove in which the ring electrode is located and mechanically coupled to the tip electrode. The tip electrode may be provided with a proximally extending electrode shank covered by a tine sleeve which is fabricated of a plastic softer than the molded plastic components and is adhered to more distally located molded plastic component. The more distally located molded plastic component preferably overlaps the electrode shank to provide a stronger structure. |
|
DETAILED DESCRIPTION The lead disclosed in the present application is particularly designed to reduce problems associated with extraction after implant.
In order to accomplish this goal, the lead is provided with three structural features, each directed particularly to providing a lead which is easier to extract and less likely to be damaged during the extraction process.
The first feature of the lead is an improved tip-ring assembly, extending from the tip or distal electrode and including the associated ring electrode located proximal thereto.
In particular, the tip-ring assembly is adapted for use in conjunction with electrodes employing passive fixation mechanisms such as tines, in which the tip electrode is fixedly mounted with respect to the lead body, rather than advanceable from the lead body as in the context of a screw-in lead.
In order to enhance the durability of the lead during the extraction, the tip-ring assembly is fabricated of three molded plastic components, two of which are fabricated of a relatively rigid plastic, harder than that typically employed in the segment between the tip and ring electrode in bipolar leads employing passive fixation mechanisms.
The plastic components are configured to provide a mechanical interlock between the tip electrode and the ring electrode when assembled, and are additionally bonded to plastic insulative tubes or coatings covering coiled and/or cabled conductors extending to the tip-ring assembly area.
In particular, the tip-ring assembly includes a tine sleeve having a central lumen into which a proximal extending shank portion of the tip electrode is inserted, a tip-ring spacer component, adapted to be glued to the proximal end of the tine sleeve and a ring-coil spacer component, adapted to be glued to the tip-ring spacer component, and around which a ring electrode may be located.
The ring-coil and tip-ring spacer components together define a circumferential groove dimensioned to receive and retain the ring electrode.
The distal end of the tip-ring spacer is configured to overlap the proximal end of the electrode shank located within the tine sheath, so that an generally rigid assembly is provided extending from the distal or tip electrode through and including the ring electrode of the lead
|
| Related patents |
|
|
Method of making a multi-electrode double layer capacitor having single electrolyte seal and aluminum-impregnated carbon cloth electrodes
OF THE INVENTION The following description of the presently contemplated best mode of practicing the invention is not to be taken in a limiting sense, but is made ...
|
|
|
Endocardial defibrillation lead with looped cable conductor
In accordance with the present invention, there is provided an implantable endocardial defibrillation lead having a looped cable conductor for conducting at least high ...
|
|
|
Method for sealing an ultracapacitor, and related articles
In response to the needs discussed above, the present inventors have discovered an improved process for sealing at least one ultracapacitor which includes a multi-layer ...
|
|
|
Lithium secondary battery
The present invention has been made in view of the above-described problems to be solved, and an object of the present invention is therefore to provide a lithium ...
|
|
|
Implantable medical device having flat electrolytic capacitor with liquid electrolyte fill tube
The present invention has certain objects. That is, the present invention provides solutions to many problems existing in the prior art respecting flat electrolytic ...
|
|
|
Method of making an hermetically sealed implantable medical device having a vacuum-treated liquid electrolyte-filled flat electrolytic capacitor
The present invention has certain objects. That is, the present invention provides solutions to many problems existing in the prior art respecting flat electrolytic ...
|
|
|
Welding power supply for pulsed spray welding
These and other limitations in the prior art have been overcome by the present invention which, according to one embodiment, is an arc welding machine for providing a ...
|
|
|
Battery pack
It is an object of the present invention to provide a battery pack comprising a container which is reduced in wall thickness while ensuring a required strength thereof. I...
|
|
|
Extractable implantable medical lead
The lead disclosed in the present application is particularly designed to reduce problems associated with extraction after implant. In order to accomplish this goal, the ...
|
|
|
Electrode material for electrochemical capacitor, electrochemical capacitor comprising the same, and method for the production of the same
One object of the present invention is to provide a novel electrode material to be used to produce electrodes of electrochemical capacitors, which can provide capacitors ...
|
|
|
Metal Working 
