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Publication numberUS3719190 A
Publication typeGrant
Publication dateMar 6, 1973
Filing dateMar 9, 1971
Priority dateMar 9, 1971
Publication numberUS 3719190 A, US 3719190A, US-A-3719190, US3719190 A, US3719190A
InventorsAvery R
Original AssigneeAvery Lab Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Heart stimulation electrode with a conical positioning parachute
US 3719190 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

March 6, 1973 R. E. AVERY 3,719,190

HEART STIMULATION ELECTRODE WITH A CONICAL POSITIONING PARACHUTE Filed March 9, 1971 INVEN'TOR.

ROGER E. AVERY BY ,mm/ M/{g ATTORNEY United States Patent 3,719,190 HEART STIMULATION ELECTRODE WITH A CONICAL POSITIONING PARACHUTE Roger E. Avery, Melville, N.Y., assignor to Avery Laboratories, Inc., Farmingdale, N.Y. Filed Mar. 9, 1971, Ser. No. 122,457 Int. Cl. A61m J/04 U.S. Cl. 128-418 5 Claims ABSTRACT OF THE DISCLOSURE This invention relates to electrodes and in particular to electrodes suited for insertion through a peripheral vein to make electrical contact with the heart for purposes of electrical stimulation from an external source of electrical energy.

BACKGROUND OF THE INVENTION Patients sulfering from an acute heart attack often require the application of electrical stimulus in order to keep the heart operating during a recuperation period. In order to apply the stimulus it is necessary to connect electrodes to the heart with electrical conductors leading from the electrodes to a source of electrical energy. Frequently patients require the use of a defibrillator under conditions where a delay of a few moments in applying the electrodes may spell the difference between life and death. Under such conditions, the electrodes of this invention may be inserted through any of the peripheral veins in the legs, arm, neck and can be inserted through a needle or through a cutdown in the skin. Prior art electrodes were manually pushed up into the vein and followed by means of a fiuoroscope. When the physician observed the electrode tips reaching the ventricle chamber of the heart, he either wedged the electrode into the base of the right ventricle called the apex, or he let it flow into the outflow tract. When it reached the desired point, he taped the other end of the electrode onto the patients arm. In about ten days an electrode inserted in this manner becomes entrapped in growing tissue. In many instances, it is desirable to remove the electrode before it becomes ingrown.

The present invention provides a flexible electrode assembly which may be inserted into the vein and which carries a parachute which draws the electrode directly into the heart cavities as it is swept along by the flow of blood. The parachute is made of a flexible material and is so constructed that a light pull Will invert the parachute to permit it to be withdrawn with the electrode through the veins without damage to the tissues.

According, it is an object of this invention to provide an electrode assembly that can be drawn into the heart cavity by force of the blood stream.

A particular object of this invention is to provide an improved heart electrode assembly.

Another object is to provide a heart electrode assembly which may be readily withdrawn.

Still another object of this invention is to provide a heart electrode having a parachute for drawing the electrode through a vein.

These and other features, objects and advantages of the invention will, in part, be pointed out with particuice larity and will, in part, become obvious from the followmg more detailed description of the invention, taken in conjunction with the accompanying drawing, which forms an. integral part thereof.

In the drawings:

In the various figures of the drawing like reference characters designate like parts.

FIG. 1 is a front elevational view of an electrode;

FIG. 2 is a side elevational view taken along line 2-2 of FIG. 1; and

FIG. 3 is a side elevational view showing the electrode assembly with the parachute in an inverted position.

Referring now to FIGS. 1 and 2, where there is shown an electrode contact member generally formed of physiologically inert metal, such as platinum and which constitutes a cap member 11 secured to a flexible wire lead made of fine filaments of, say, stainless steel, or platinum wire. The electrode leads are connected to a conventional signal source such as a Pacemaker. The lead 12 is covered by an insulating material such as Teflon 14. The area 15 between the electrode portion 11 and the protective shield 14 is a bare metal cable coated with a silicone rubber primer. Suitable primers are commercially available from suppliers of silicone rubber materials. A silicone rubber parachute member 16 bridges the gap and includes a sleeve portion 17 which is sealed to the cable by the rubber primer. The parachute is frictionally secured by shrink fitting it to electrode cap member 11 and cable portion 15. A sleeve member 19 shrink fits and frictionally engages sleeve member 14. It will be appreciated that, in addition to the adhesive bond, the parachute is mechanically interlocked between electrode and sheath 14.

The physician, in order to insert the electrode into the heart, can slip this very fine assembly whose typical maximum dimension is only about 2.7 mm. into any convenient vein and then depend on the flow of liquid engaging the conical parachute 20 to float the fine assembly directly into the main vein and across to the right ventricle and then into the pulmonary outflow tract in contact with the inner wall of the heart. By making the parachute assembly of a soft resilient material and of invertible construction, the electrode can be readily withdrawn by applying a moderate pull in which case the conical portion 20 inverts to the position 20', as shown in FIG. 3, presenting a tapered face in the direction of withdrawal when the electrode assembly is withdrawn. Since the material is soft the cone is actually crimped down to a small bundle which easily passes through the conventional cannula of but 1.5 mm. ID. The chuite material should be physiologically inert and sterilizable. Silicone rubber is well suited for this purpose and is currently the preferred material.

There has been disclosed heretofore the best embodiment of the invention presently contemplated. However, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit of the invention.

What I claim as new and desire to secure by Letters Patent is:

1. An electrode assembly comprising:

(a) a flexible electrical conductor;

(b) an electrically conductive electrode member fixed to one end of said conductor in electrical and mechanical connection; and

(c) a hollow cone member carried by said conductor proximate said electrode with the apex of the cone directed to the tip of the electrode.

2. The electrode assembly of claim 1 wherein said hollow cone member is formed of an elastomeric material.

3. The assembly of claim 2 wherein said elastomeric References Cited material is silicone rubber.

4. The electrode assembly of claim 1 wherein said UNITED STATES PATENTS hollow cone member is flexible at least proximate the apex 724,913 4/ 1903 Montgomery 128 245 of the cone whereby upon the application of a force in 5 2, 60,175 11 1953 Thrasher et 1 v 7, ;404 the direction from apex to base of said cone, said cone 3,437,091 4/1969 je h l i 1; 1, 112s-404 member is inverted. 3,563,245 2/1971 McLean et al 128-419 P 5. The electrode assembly of claim 1 including an ins-ulator covering the said conductor to a point proximate said electrode and said cone member having a tubular 10 portion extending from the apex of said cone constricted about a portion of said electrode and a portion of said 128 419 D 419 P conductor.

WILLIAM E. KAMM, Primary Examiner

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3902501 *Jun 21, 1973Sep 2, 1975Medtronic IncEndocardial electrode
US3976082 *Feb 24, 1975Aug 24, 1976German SchmittIntracardial stimulation electrode
US4301815 *Jan 23, 1980Nov 24, 1981Telectronics Pty. LimitedTrailing tine electrode lead
US4409994 *Jun 2, 1981Oct 18, 1983Telectronics Pty., Ltd.Lap joint molding member for a pacemaker electrode lead
US4510939 *Dec 22, 1982Apr 16, 1985Biosonics, Inc.Means for transferring electrical energy to and from living tissue
US4519404 *Sep 28, 1983May 28, 1985Fleischhacker John JEndocardial electrode lead with conical fixation mechanism
US4564023 *Mar 28, 1983Jan 14, 1986Cordis CorporationRetention skirt for pacing electrode assembly
US4582069 *Mar 19, 1985Apr 15, 1986Mcarthur William AFixation means for an endocardial electrode
US4637388 *Oct 15, 1984Jan 20, 1987Portex, Inc.Tracheal tube obturator with reversible tip
US4657020 *Jul 10, 1985Apr 14, 1987Jayco PharmaceuticalsMethod of using a foreign object protector hood
US4669488 *Oct 7, 1985Jun 2, 1987Cordis CorporationRetention skirt for pacing electrode assembly
US4858623 *Jul 13, 1987Aug 22, 1989Intermedics, Inc.Active fixation mechanism for lead assembly of an implantable cardiac stimulator
US4913147 *Sep 23, 1987Apr 3, 1990Siemens AktiengesellschaftHeart pacemaker system with shape-memory metal components
US4972833 *Jan 22, 1987Nov 27, 1990Westmed Pty. Ltd.Epicardiac pacing lead
US4991578 *Apr 4, 1989Feb 12, 1991Siemens-Pacesetter, Inc.Method and system for implanting self-anchoring epicardial defibrillation electrodes
US5738220 *Sep 30, 1996Apr 14, 1998Pacesetter, Inc.Distal tip protector cap
US7425202 *Mar 5, 2004Sep 16, 2008Percutaneous Systems, Inc.Non-seeding biopsy device and method
US20050197595 *Mar 5, 2004Sep 8, 2005Percutaneous Systems, Inc.Non-seeding biopsy device and method
DE2506694A1 *Feb 18, 1975Sep 11, 1975Medtronic IncImplantable elektrodenanordnung
DE3048805A1 *Dec 23, 1980Sep 17, 1981Medtronic IncImplantierbare leitung
EP0126892A1 *Mar 27, 1984Dec 5, 1984Cordis CorporationRetention skirt for pacing electrode assembly
WO1984002459A1 *Dec 22, 1983Jul 5, 1984Biosonics IncMeans for transferring electrical energy to and from living tissue
Classifications
U.S. Classification607/122
International ClassificationA61N1/05
Cooperative ClassificationA61N1/056
European ClassificationA61N1/05N