DE1813232A1 - Electrical conductor for electrosystolic stimulators - Google Patents

Description

Pranzosian priority before, i 15..Oeze \\ ihpr. 1957 French from the _T patent application '^^ IMSS ^ 53 ^ _{(His): jim} j

The invention relates to an electrical conductor for stimulators located in the body. _1 _{; j} \,;, ·> ιγ. \

The conductors of the electrosystolic stimulators must guarantee about 30,000 ^ Wo ^J WPzzfiTen "per *" January ^ '. The ⁵ 'experience of VJiederbelebungsdienste has shown that in the usual "models

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Regardless of the selected *% £ & ^ _Λ $ η $ its type of use the metallic conductor core in about 40 # of the cases - possibly between de- ^ r, 4r ^ ifce ^ _u u ^ ätud ^^ rifpiinif; ö, e, no. i ^; lc! nat jiWii / teieSitvT SAbei ^ "the usually füifte ^^ 'fee'it'e ^^ r ^ öiiiö ^ te ι fet all - platinum has a high price.

The invention has for its object to provide a head of to create the type mentioned at the beginning, avoiding the disadvantages mentioned above, which is particularly flexible and elastic, mechanically resistant and completely insulated, with no creep under pressure, i.e. no deformation

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ac ^ niin ',. conductor- _r v, or _r , 31.IeXa. solved by the fact that, according to the conductor, the invention is formed by a core of braided carbon fibers, which is covered with an insulating sheath.

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Moderate conductor is ₃ that the soul with an elastomer

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electrode in the organ to be treated serves ₃ and at the other end _r e ^ towk mejfoEä ^^ . ^ _1. ■ & * -

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The conductor according to the invention therefore has no essential metallic Ue He. His leading 'Clement consists of I ¹ OIiIe. j.:.v· leads \ 1ε Iapulse of the electrosystolic stimulators to the

) he erf inulin jsgemäße conductor has the advantage of a ₃ He oaß ulriesanie Lufesti'jung in an entirely of -lem. Operation dependent L3. «Each of Jnüelektrocien both the ripicar.Iiu: n for the ublicl'e stimulation as.?. Uc !; on the endocardium of the right i: erslca: -i'ier for the inner heart stimulation ;; enable

It is known (French patent specification 1 1500 kol) to use protiies made of carbon materials in the human body, in particular made of columns or graphite, preferably large units of carbon or fibers. The neutrality of the co] ile ^ e ^ e over or ^ aniscl ^ en tissues is in fact perfect. In many cases, the conductor according to the invention also has the advantage that it is completely inactive with respect to organic tissues.

Due to its good electrical conductivity, carbon is or Graphite can also be used as an electrical conductor.

For the production of the conductor according to the invention, cords are used which, for example, start from a fabric formed by regenerated cellulose from cotton, mercerized cotton, viscose or polynose fibers, as described in French patent 1,493,636. The cords obtained by carbonization and / or graphitization under known conditions are made of conductive elementary carbon fibers5 with a diameter between two and five microns. The cords, once braided, are on the order of 2 ₃ 15 mm in diameter, but can be thinner. The following table shows the characteristics

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such, for example selected cord with a diameter of 2 45 mm indicated:

Weight per meter 1 _} 5 g

Tensile strength 3 to 5 kg (or 35 to

Electrical resistance 90 Ohm / m ⁵ ° ¹ ^

The carbon mesh is formed by pressing on a metal core and is then covered by continuous wetting, pressing5 drawing of a high purity medical elastomer ₃ chosen in this way _; that the conductor obtained has approximately the same tensile strength and the same modulus of elasticity in its entire Hasse. The conductor obtained in this way has the following characteristics:

Length ... 50 to 150 cm

Diameter, .. 2 to k mm \

Critical elongation 100?

Tensile strength 5 to 8 kg

Creep 0

The electrical resistance of the conductors is variable. depending on their length and their fiber compression.

The elastomer cover is not only on the outer surface of the ladder but also on its inner surface, if it is a ladder with a central cavity.

The following embodiments of the conductor according to the invention can be formed; .

a) Conductors ₃ which are intended for permanent use in the human body, in the form of epicardial or endocavitary probes. In this case you have a full soul

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obtained by introducing the elastomer. This Elastomer can be mixed with a substance, such as barium sulphate, which enables the radioactive plague.

b) Conductors that are intended for temporary use in your human body. They are hollow and in this case allow a sensor to sag or to remove the Blood pressure and, in the case of an endocavitary probe, continuous perfusion.

c) Temporary catheters that provide endocavitary stimulation, allow pressure decrease and blood transfer with one ;; sufficiently small diameter., uri using intravenous trocarts appropriate caliber to be introduced. These catheters are white a central cavity.

Due to the extreme flexibility of the conductor, its epicardial or endocarclic implantation can be carried out using a contact electrode formed by the carbon fiber itself is formed. which under the conditions; that the for the Cardiac stimulation required density of electrical current is maintained, appropriately by their elastomeric coating; is exempt. The experience; has shown that both on the üpicardium for classic stimulation as well as on the Endocardium of the right ventricle for internal stimulation the proliferation of cells penetrate the carbon pathway and help hold the electrode in place.

lan can be at the end of the carbon fiber end electrode opposite. 3, provide a small platinum ring that a cardiological measurement; enables. This ring can also serve as a guide stop when inserting the conductor.

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A particular advantage of erfinriun-js ^ ^ s eruL .Leiters ordered that he dry to 22O ⁰ C or damp J-hite be sterilized. ·

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Claims (1)

Iyi electrical conductor far in "örper located Otinula ^^ ly ^ .. ^ Ui LPLL ^a .PP ^ j-Slll} y .. ΐ ^{£, -?. Ei>} '-ui ¹ C ¹ a"> 2ele from - _; eflochtenen ^ ohlefr.sern. which is covered with an insulating. 6. Deceraber 19 GZ • T.ho. '. Lson -iedieal-Tclco, Paria Vj . Boulevard Pasteur 33 (]? Rankreic and
Le Carbone Lorraire, Paris VJ. iiuo de Acacir.s H5 (France) ._ · · conductor according to - claim 1, characterized _s that the core is hollow. " 3. Head according to claim 2, characterized in ^. that the soul is covered with an elastomer. Ladder after opening ~> . thereby. ^ ükennseicJ.nat ._, because .. " ± u -las Llaütomer a far" .lönt ^ en radiate detectable substance. vrie ein-jt-Mischt is. A ladder according to any one of the preceding claims; characterized in that "he ^ at eine.a, hands only liohlefasern exhibiting stripped part as Implaritationselektroue in your tax treated Orjan _s is used and at the other: a 0nde r-ietalliscJjen .leJoriirj has. υ. Ladder according to claim 5 ₃ characterized ^; that the. ·, is made of platinum. / 90982 6/1027 IBTJTJJ 7. Procedure for the production of ues conductor according to one of the claims 1 to 6 characterized., O.ai-, made of carbon fibers with a diameter of some jiileron a braid with a Diameter is formed by eniren '.lillinetern'., Passing through Compression formed on a metallic soul and with a medically inactive compared to organic vines Elastomer through repeated wetting, pressing and under heat ensuing bestnubun ^ covered v / earth. IAD ORIQINAL, 909826/1027