Source: http://www.google.com/patents/US5476496?dq=645576
Timestamp: 2013-12-19 07:37:49
Document Index: 52576899

Matched Legal Cases: ['art. 2', 'art 2', 'art 2', 'art 2', 'art 2', 'art 2']

Patent US5476496 - Implantable medical electrode system having an indifferent electrode formed ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAn implantable electrode system includes a connector for connecting a proximal end of the electrode to an implantable medical apparatus, such as for stimulating living tissue, and a distal end at which a tip electrode is located. The proximal end and the distal end are connected by a conductor which...http://www.google.com/patents/US5476496?utm_source=gb-gplus-sharePatent US5476496 - Implantable medical electrode system having an indifferent electrode formed as a part of the electrode insulator sleeveAdvanced Patent SearchPublication numberUS5476496 APublication typeGrantApplication numberUS 08/241,397Publication dateDec 19, 1995Filing dateMay 11, 1994Priority dateJun 1, 1993Fee statusLapsedPublication number08241397, 241397, US 5476496 A, US 5476496A, US-A-5476496, US5476496 A, US5476496AInventorsJakub Hirschberg, Hans StrandbergOriginal AssigneePacesetter AbExport CitationBiBTeX, EndNote, RefManPatent Citations (9), Referenced by (32), Classifications (4), Legal Events (8) External Links: USPTO, USPTO Assignment, EspacenetImplantable medical electrode system having an indifferent electrode formed as a part of the electrode insulator sleeveUS 5476496 AAbstract An implantable electrode system includes a connector for connecting a proximal end of the electrode to an implantable medical apparatus, such as for stimulating living tissue, and a distal end at which a tip electrode is located. The proximal end and the distal end are connected by a conductor which electrically connects the medical apparatus to the electrode tip, and which is surrounded by a flexible insulating sleeve. In order to provide an indifferent electrode having a large surface area relative to the size of the tip electrode, the insulating sleeve is provided with a section formed by an electrically conductive, flexible material, which serves as the indifferent electrode. The flexibility of the electrode system is retained, while providing an indifferent electrode of optional size.
We claim as our invention: 1. An implantable electrode system comprising:an electrode lead having a proximal end adapted for connection to a medical apparatus for stimulating living tissue and a distal end adapted for introduction into a heart to be located adjacent living endocardiac tissue to be stimulated; said electrode lead having a flexible, insulating sleeve having a constant outer diameter between said proximal and distal ends, a first conductor extending through said sleeve between said proximal end and said distal end and being connectable at said proximal end to said medical apparatus, a tip electrode electrically connected to said first conductor and located at said distal end, and a second conductor, electrically insulated from said first conductor, contained in said insulating sleeve; and said insulating sleeve having a section made electrically conductive and forming an indifferent electrode, electrically connected to said second conductor, exposed at an exterior of said insulating sleeve, said section forming said indifferent electrode being substantially as flexible as a remainder of said insulating sleeve beyond said section and not enlarging said outer diameter, and said indifferent electrode having a length along said insulating sleeve so that a first portion of said indifferent electrode is disposed outside of said heart and a second portion of said indifferent electrode is disposed inside of said heart when said distal end is located adjacent said tissue to be stimulated in said heart. 2. An electrode system as claimed in claim 1 wherein said indifferent electrode comprises a conductive coating extending along a defined exterior section of said insulating sleeve, and wherein said second conductor and said conductive coating are electrically connected by a separate conductor extending through said insulating sleeve between said conductive coating and said second conductor.
SUMMARY OF THE INVENTION It is an object of the present invention to provide an implantable electrode system which includes an indifferent electrode, which is easy to manufacture and to implant, and which minimizes the risk of damage to the vascular system after implantation.
DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic illustration showing an electrode system constructed in accordance with the principles of the present invention connecting a pacemaker and a heart.
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a pacemaker 1 connected to a heart 2 via an electrode system 3. The electrode system 3 is connected to the pacemaker 1 at a proximal end 4, the electrode system 3 containing a first conductor 5 and a second conductor 6 which are connected to electronics (not shown) in the pacemaker 1. The electrode system 3 is further connected to the heart 2 at a distal end 7. A tip electrode 8, which is connected to the first conductor 5 and is in contact with heart tissue, is disposed at the distal end 7. The electrode system 3 also has an indifferent electrode 9, which is insulated from the tip electrode 8, and which is designated in FIG. 1 by the darkened section of the electrode system 3. The indifferent electrode 9 is connected to the second conductor 6. The pacemaker 1, via the first conductor 5 and the second conductor 6, emits and receives electrical signals to and from the heart 2. When electrical signals are sensed in the heart 2, the tip electrode 8 detects the signals, and the indifferent electrode 9 remains passive, so that the signals which are obtained are easily interpreted by circuitry in the pacemaker 1. In principle, the indifferent electrode 9 may extend along any desired length of the electrode system 3. It is important, however, that at least a part of the indifferent electrode 9 be located outside of the heart 2, so as to prevent cardiac signals from being detected by the indifferent electrode 9, since this would interfere with interpretation of the sensed signals.
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Gore & Associates, Inc.Implantable leadUS8380326 *Aug 11, 2003Feb 19, 2013Second Sight Medical Products, Inc.Insulated implantable electrical circuitUS8483842Apr 25, 2007Jul 9, 2013Medtronic, Inc.Lead or lead extension having a conductive body and conductive body contactUS8521286May 3, 2011Aug 27, 2013Medtronic, Inc.Lead-carried proximal electrode for quadripolar transthoracic impedance monitoringDE102007037989A1 *Aug 10, 2007Feb 19, 2009Martin-Luther-Universit�t Halle-WittenbergPercutaneous transluminal coronary angioplasty-guiding catheter for transcoronary myocardial stimulation during coronary intervention, has electrode integrated into catheter through coil or through vaporization of conductorEP1354610A1 *Apr 15, 2003Oct 22, 2003BIOTRONIK Mess- und Therapieger�te GmbH &amp; Co Ingenieurb�ro BerlinElectrode lead made of an intrinsically conductive polymerWO2000050120A1 *Feb 1, 2000Aug 31, 2000Magnusson GunnarImplantable tissue stimulating deviceWO2002083236A2 *Feb 11, 2002Oct 24, 2002Medtronic IncControl of externally induced current in an implantable pulse generator* Cited by examinerClassifications U.S. Classification607/122International ClassificationA61N1/05Cooperative ClassificationA61N1/056European ClassificationA61N1/05NLegal EventsDateCodeEventDescriptionFeb 5, 2008FPExpired due to failure to pay maintenance feeEffective date: 20071219Dec 19, 2007LAPSLapse for failure to pay maintenance feesJun 27, 2007REMIMaintenance fee reminder mailedJul 9, 2003REMIMaintenance fee reminder mailedJun 17, 2003FPAYFee paymentYear of fee payment: 8May 21, 1999FPAYFee paymentYear of fee payment: 4Jan 9, 1995ASAssignmentOwner name: PACESETTER AB, SWEDENFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AB, SIEMENS-ELEMA;REEL/FRAME:007297/0115Effective date: 19940924May 11, 1994ASAssignmentOwner name: SIEMENS ELEMA AB, SWEDENFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:STRANDBERG, HANS;HIRSCHBERG, JAKUB;REEL/FRAME:007001/0575Effective date: 19940505RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google