WO1992011061A1 - Transdermal electrode for electrotherapy - Google Patents

Transdermal electrode for electrotherapy Download PDF

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Publication number
WO1992011061A1
WO1992011061A1 PCT/FR1991/001005 FR9101005W WO9211061A1 WO 1992011061 A1 WO1992011061 A1 WO 1992011061A1 FR 9101005 W FR9101005 W FR 9101005W WO 9211061 A1 WO9211061 A1 WO 9211061A1
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WO
WIPO (PCT)
Prior art keywords
needle
coating
electrode according
skin
electrotherapy
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Application number
PCT/FR1991/001005
Other languages
French (fr)
Inventor
Jean-Pierre Thiebaud
Original Assignee
Etablissements Thiebaud Freres S.A.
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Publication date
Application filed by Etablissements Thiebaud Freres S.A. filed Critical Etablissements Thiebaud Freres S.A.
Publication of WO1992011061A1 publication Critical patent/WO1992011061A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/02—Details
    • A61N1/04—Electrodes
    • A61N1/05—Electrodes for implantation or insertion into the body, e.g. heart electrode
    • A61N1/0502—Skin piercing electrodes

Definitions

  • the present invention relates to a transcutaneous electrode for electrotherapy which can be used mainly, but not exclusively, in the medical and paramedical fields, in particular in aesthetics for the treatment of cellulite and wrinkles.
  • electrodes made up of flexible needles are implanted three times. about quarter of their length under the skin, parallel to its surface, so that they are at the same level as the fat cells.
  • the needles usually made of stainless steel, gold or other precious metals, usually have a length of between 2 and 25 cm, a diameter of 0.10 to 1 mm and are always placed in pairs. Depending on the extent of cellulite, we place a minimum of 2 to 16 or more. All these needles are connected to a specific electrotherapy device diffusing a continuous or impulse galvanic current, or a low frequency current. The treatment acts on several levels:
  • the fibers of the dermis contract and the tissues are toned, made more elastic, with degradation of the "orange peel", - finally, the implantation of the needles and the electric current stimulate the blood circulation always disturbed within cellulite tissue.
  • needles In the treatment of wrinkles, much shorter needles are used, typically 8 to 16 mm in length, which are implanted more or less horizontally or perpendicular to the skin, according to a multi- or monopuncture technique. These needles are usually thinner than the needles used to treat cellulite.
  • the invention eliminates this serious drawback and proposes a transcutaneous electrode for electrotherapy, which does not induce the appearance of spots at the point where the needle leaves the skin. It relates to an electrode consisting of a flexible needle implantable under the skin, at least part of which is surrounded by an insulating coating against oxidation, so that the isolated part is placed after implantation on both sides. another from where the needle crosses the skin.
  • the electrode is preferably of substantially cylindrical geometry and the insulating coating against oxidation can be placed on a restricted part of the needle, that is to say over a short but sufficient length, preferably representing between 5 and 20% of the total length of the needle.
  • the insulating coating can be placed normally behind the needle, beyond three-quarters of the total length of the needle. An insulation length of 2 to 3 cm is generally sufficient.
  • the insulating coating is placed at the rear over a width of 2 to 3 cm, while leaving more space behind the needle of the order of 0.5 to 3 cm, making it easier to handle the needle and / or to connect it to the electrotherapy device.
  • the needle comprises at the rear an attached metal sleeve or in one piece, which can also allow connection to the electrotherapy device.
  • the needle comprises a plastic base and the electrical connection is made at a free conductive space provided between the base and the part surrounded by the insulation.
  • the length of the insulation can be reduced in proportion to the length of the needle.
  • An insulation width of 0.3 to 0.8 cm is sufficient in most cases.
  • the coating advantageously consists of a good insulator, both electrical and thermal, for example polytetrafluoroethylene or a copolymer of polytetrafluoroethylene and polyamide-imide.
  • the insulating coating is a paint loaded with polytetrafluoroethylene.
  • the coating can also be made of a material having dielectric properties, for example a chlorinated paraxylene pol.
  • the polymers serving as coating are crystalline polymers.
  • the thickness of the insulating coating is, for the type of materials mentioned above, advantageously between 1 and 20 micrometers.
  • these products will advantageously be monolayers and, if possible, colored, thus making it easier to identify the position of the insulator with respect to the needle and the skin.
  • the needle will, before laying the insulating coating, be satin-finished by a projection of micro-abrasives on the part to be isolated, thus allowing this partly to be visible.
  • the coated needles of the insulator are hollow and can be used when injecting a treating liquid, e.g. Thio ucase against cellulite, for the treatment of f electrotherapy.
  • a treating liquid e.g. Thio ucase against cellulite
  • a typical production consists of apply, for example with a spray gun, a dispersion of the insulating product to a bare needle suitably protected by covers or masks. The insulation is deposited on the unprotected parts, and the needle is subjected, after removal of the covers or masks, to a fixing heat treatment.
  • the insulating material against oxidation is not an electrical insulator, but on the contrary an electrical conductor, for example gold or another metal of the same type.
  • the flexible needle is advantageously coated over its entirety and the gold layer preferably has a thickness of between 0.1 and 0.5 micrometers.
  • the gold coated needle may be hollow for the injection of a treating liquid.
  • the needles are preferably sterile, single use (stainless steel needles). They will be conditioned for example in peelable packaging.
  • the material constituting the needle is not in contact with the skin. It is in fact mainly electrolytic oxidation phenomena appearing on the needle which cause the coloring in freckles where the needle has crossed the skin, coloration which takes a long time to subside or which, in some subjects, does not subside any more.
  • electrotherapy for cellulite treatment is carried out under the following conditions: device: sold by Utrilog, Marseille impulse galvanic current of voltage equal to 12 volts and of equal intensity ranging from 0 to 200 micro-amps; or low frequency current from 5 to 50 Hertz.
  • the needles are taken from a sterile packaging in boxes of 70 peelable sachets of 8 needles each with individual polyethylene protective tube. They have been sterilized with ethylene oxide and are coated, 1 cm from the rear, with an insulating layer of length equal to 2 cm in food-grade polytetrafluoroethylene, inert, biocompatible and non-stick, monolayer, with a thickness of 10 micrometers.
  • This polytetrafluoroethylene is sold by Appli France under the reference M20 and has gray pigmentation.
  • Example 1 The treatment of Example 1 is repeated with 12 cm stainless steel needles coated with a chlorinated paraxylene of the Parylene brand, reference C, also sold by the company Appli France.
  • Electrotherapy treatment is carried out as described in Example 1, but using stainless steel needles coated with a thin layer of gold of 0.2 micrometers over their entire length.
  • gold provides better conductivity and facilitates the passage of electrical energy.

Abstract

A transdermal electrode for electrotherapy consisting of a flexible needle for implantation under the skin. The electrode is at least partially protected by an oxidation-proof coating so that the protected portion of the needle is located on either side of the spot where the needle passes through the skin after implantation.

Description

ELECTRODE TRANSCUTANEE POUR ELECTROTHERAPIE TRANSCUTANEOUS ELECTRODE FOR ELECTROTHERAPY
La présente invention se rapporte à une électrode transcutanée pour électrothérapie utilisable principalement, mais non exclusivement, dans les domaines médicaux et para-médicaux, notamment en esthétique pour le traitement de la cellulite et des rides.The present invention relates to a transcutaneous electrode for electrotherapy which can be used mainly, but not exclusively, in the medical and paramedical fields, in particular in aesthetics for the treatment of cellulite and wrinkles.
Dans le traitement médical de la cellulite, des électrodes constituées d'aiguilles souples (dans la suite de l'exposé, le terme "électrode" ou "aiguille" seront utilisés indiffére ment l'un pour l'autre) sont implantées aux trois-quarts environ de leur longueur sous la peau, parallèlement à sa surface, de façon à ce qu'elles se trouvent au même niveau que les cellules graisseuses.In the medical treatment of cellulite, electrodes made up of flexible needles (in the rest of the presentation, the term "electrode" or "needle" will be used interchangeably) are implanted three times. about quarter of their length under the skin, parallel to its surface, so that they are at the same level as the fat cells.
Les aiguilles, généralement en acier inoxydable, en or ou autres métaux précieux, ont habituellement une longueur comprise entre 2 et 25 cm, un diamètre de 0,10 à 1 mm et sont toujours placées par paires. Selon l'étendue de la cellulite, on en place un minimum de 2 à 16 ou plus encore. Toutes ces aiguilles sont reliées à un appareil d'électrothérapie spécifique diffusant un courant galvanique continu ou impulsionnel, ou un courant basse fréquence. Le traitement agit sur plusieurs plans :The needles, usually made of stainless steel, gold or other precious metals, usually have a length of between 2 and 25 cm, a diameter of 0.10 to 1 mm and are always placed in pairs. Depending on the extent of cellulite, we place a minimum of 2 to 16 or more. All these needles are connected to a specific electrotherapy device diffusing a continuous or impulse galvanic current, or a low frequency current. The treatment acts on several levels:
- tout d'abord, il s'établit entre chaque paire d'aiguilles un champ électrique qui va modifier la perméabilité de la membrane des cellules graisseuses, celles-ci se vidant littéralement de leur graisse qui est ensuite dégradée,- first of all, an electrical field is established between each pair of needles which will modify the permeability of the membrane of the fatty cells, the latter literally emptying of their fat which is then degraded,
- cette dégradation est encore amplifiée par l'augmentation de la chaleur locale liée au passage du courant électrique, - de plus, une hydrolyse se produit, qui élimine l'eau du tissu cellulitique,- this degradation is further amplified by the increase in local heat linked to the passage of electric current, - in addition, hydrolysis occurs, which removes water from the cellulite tissue,
- les fibres du derme se contractent et les tissus sont tonifiés, rendus plus élastiques, avec dégradation de la "peau d'orange", - enfin, l'implantation des aiguilles et le courant électrique stimulent la circulation sanguine toujours perturbée au sein d'un tissu cellulitique.- the fibers of the dermis contract and the tissues are toned, made more elastic, with degradation of the "orange peel", - finally, the implantation of the needles and the electric current stimulate the blood circulation always disturbed within cellulite tissue.
Dans le traitement des rides, on utilise des aiguilles beaucoup plus courtes, typiquement de 8 à 16 mm de longueur, qui sont implantées plus ou moins horizontalement ou perpendiculairement à la peau, selon une technique de multi- ou monopuncture. Ces aiguilles sont habituellement plus fines que les aiguilles destinées au traitement de la cellulite.In the treatment of wrinkles, much shorter needles are used, typically 8 to 16 mm in length, which are implanted more or less horizontally or perpendicular to the skin, according to a multi- or monopuncture technique. These needles are usually thinner than the needles used to treat cellulite.
Or, on a constaté à de fréquentes occasions qu'une pigmentation rouge-marron, du type "taches de rousseur" apparaissait à l'endroit où l'aiguille traverse la peau, pigmentation due, semble t-il, au phénomène d'électrolyse et peut-être aussi à l'élévation de la température de l'aiguille selon l'intensité du courant utilisé. Ce problème de taches ou brûlures est d'ailleurs bien connu et évoqué, dans un contexte et avec des solutions différentes, dans les exposés FR 2 589 739 et FR 2 439 025. r However, it has been observed on frequent occasions that a red-brown pigmentation, of the type "spots of redness "appeared at the place where the needle crosses the skin, pigmentation due, it seems, to the phenomenon of electrolysis and perhaps also to the rise in the temperature of the needle according to the intensity of the current This problem of stains or burns is moreover well known and evoked, in a context and with different solutions, in the presentations FR 2 589 739 and FR 2 439 025. r
On comprendra aisément que, ce traitement s'adressant principalement aux femmes pour améliorer leur esthétique, les inconvénients précités sont rédhibitoires.It will be readily understood that, this treatment being intended mainly for women to improve their aesthetics, the aforementioned drawbacks are unacceptable.
L'invention élimine ce grave inconvénient et propose une électrode transcutanée pour électrothérapie, n'induisant pas l'apparition de taches à l'endroit où l'aiguille sort de la peau. Elle a trait à une électrode constituée d'une aiguille souple implantable sous la peau, dont une partie au moins est entourée d'un revêtement isolant contre l'oxydation, de telle sorte que la partie isolée se place après implantation de part et d'autre de l'endroit où l'aiguille traverse la peau.The invention eliminates this serious drawback and proposes a transcutaneous electrode for electrotherapy, which does not induce the appearance of spots at the point where the needle leaves the skin. It relates to an electrode consisting of a flexible needle implantable under the skin, at least part of which is surrounded by an insulating coating against oxidation, so that the isolated part is placed after implantation on both sides. another from where the needle crosses the skin.
De fait, on a constaté qu'ainsi aucune pigmentation n'apparaissait au point où l'aiguille sort de la peau, même pour des courants galvaniques conséquents et des durées d'implantation importantes. Par l'utilisation du mot "entouré", on a entendu signifier que le revêtement est continu sur tout le pourtour de l'électrode, sans interruption aucune.In fact, it has been found that in this way no pigmentation appears at the point where the needle emerges from the skin, even for substantial galvanic currents and long implantation times. By the use of the word "surrounded", it has been understood to mean that the coating is continuous around the entire periphery of the electrode, without any interruption.
L'électrode est de préférence de géométrie sensiblement cylindrique et le revêtement isolant contre l'oxydation peut être disposé sur une partie restreinte de l'aiguille, c'est-à-dire sur une longueur courte mais suffisante, représentant de préférence entre 5 et 20 % de la longueur totale de l'aiguille.The electrode is preferably of substantially cylindrical geometry and the insulating coating against oxidation can be placed on a restricted part of the needle, that is to say over a short but sufficient length, preferably representing between 5 and 20% of the total length of the needle.
Dans le cas des aiguilles de traitement de la cellulite, le revêtement isolant peut être placé normalement à l'arrière de l'aiguille, au delà des trois quarts de la longueur totale de l'aiguille. Une longueur d'isolant de 2 à 3 cm est généralement suffisante.In the case of cellulite treatment needles, the insulating coating can be placed normally behind the needle, beyond three-quarters of the total length of the needle. An insulation length of 2 to 3 cm is generally sufficient.
Par exemple, pour une aiguille d'une longueur de 12,5 cm et d'un diamètre de 0,30 ou 0,60 mm, le revêtement isolant est placé à l'arrière sur une largeur de 2 à 3 cm, tout en ménageant plus à l'arrière de l'aiguille un espace libre de l'ordre de 0,5 à 3 cm, permettant de manipuler plus aisément l'aiguille et/ou de connecter celle-ci à l'appareil d'électrothérapie.For example, for a needle with a length of 12.5 cm and a diameter of 0.30 or 0.60 mm, the insulating coating is placed at the rear over a width of 2 to 3 cm, while leaving more space behind the needle of the order of 0.5 to 3 cm, making it easier to handle the needle and / or to connect it to the electrotherapy device.
En variante, l'aiguille comprend à l'arrière un manchon métallique rapporté ou d'un seul tenant, qui peut permettre lui-aussi la connexion à l'appareil d'électrothérapie. En autre variante, l'aiguille comprend une embase plastique et la connexion électrique est réalisée au niveau d'un espace conducteur libre ménagé entre l'embase et la partie entourée de l'isolant.Alternatively, the needle comprises at the rear an attached metal sleeve or in one piece, which can also allow connection to the electrotherapy device. In another variant, the needle comprises a plastic base and the electrical connection is made at a free conductive space provided between the base and the part surrounded by the insulation.
Pour les aiguilles de traitement des rides, la longueur de l'isolant peut être réduite en proportion de la longueur de l'aiguille. Une largeur d'isolant de 0,3 à 0,8 cm suffit dans la majorité des cas.For wrinkle treatment needles, the length of the insulation can be reduced in proportion to the length of the needle. An insulation width of 0.3 to 0.8 cm is sufficient in most cases.
Les conditions énoncées ci-dessus sont celles où le revêtement est avantageusement constitué d'un bon isolant, à la fois électrique et thermique, par exemple du polytétrafluoroéthylène ou un copolymère de polytétrafluoroéthylène et de polyamide-imide.The conditions set out above are those where the coating advantageously consists of a good insulator, both electrical and thermal, for example polytetrafluoroethylene or a copolymer of polytetrafluoroethylene and polyamide-imide.
En variante, le revêtement isolant est une peinture chargée en polytétrafluoroéthylène.Alternatively, the insulating coating is a paint loaded with polytetrafluoroethylene.
Le revêtement peut être également constitué d'une matière ayant des propriétés diélectriques, par exemple un pol paraxylène chloré.The coating can also be made of a material having dielectric properties, for example a chlorinated paraxylene pol.
De préférence, les polymères servant de revêtement sont des polymères cristallins.Preferably, the polymers serving as coating are crystalline polymers.
L'épaisseur du revêtement isolant est, pour le type de matériaux cités ci-dessus, avantageusement compris entre 1 et 20 micromètres.The thickness of the insulating coating is, for the type of materials mentioned above, advantageously between 1 and 20 micrometers.
Les divers produits de revêtement cités ci- dessus présentent des avantages majeurs, dans la mesure où ils se caractérisent par des bonnes qualités d'anti¬ adhérence, qui permet une pénétration de l'aiguille sans à-coups, donc sans douleur pour le patient.The various coating products mentioned above have major advantages, to the extent where they are characterized by good qualities of anti¬ adhesion, which allows penetration of the needle smoothly, therefore without pain for the patient.
Ces produits seront de qualité médicale, mieux encore biocompatibles, ce qui est toujours un atout même si leur contact avec la peau est par nature d'une durée limitée.These products will be of medical quality, better still biocompatible, which is always an asset even if their contact with the skin is by nature of a limited duration.
Pour rendre la tâche du praticien plus aisée, ces produits seront avantageusement monocouches et, si possible, colorés, facilitant ainsi le repérage de la position de l'isolant- par rapport à l'aiguille et à la peau.To make the practitioner's task easier, these products will advantageously be monolayers and, if possible, colored, thus making it easier to identify the position of the insulator with respect to the needle and the skin.
Pour des produits de revêtement où la coloration est difficile, voire impossible, tels que les polyparaxylènes chlorés, l'aiguille sera, avant pose du revêtement isolant, satinée par une projection de micro¬ abrasifs sur la partie devant être isolée, permettant ainsi à cette par *tie d'être visible.For coating products where coloring is difficult, if not impossible, such as chlorinated polyparaxylenes, the needle will, before laying the insulating coating, be satin-finished by a projection of micro-abrasives on the part to be isolated, thus allowing this partly to be visible.
Selon une autre forme d'exécution, les aiguilles revêtues de l'isolant sont creuses et peuvent servir alors à injecter un liquide traitant, par exemple de la Thio ucase contre la cellulite, pendant le traitement dfélectrothérapie.According to another embodiment, the coated needles of the insulator are hollow and can be used when injecting a treating liquid, e.g. Thio ucase against cellulite, for the treatment of f electrotherapy.
La fabrication des aiguilles ne pose pas de problème particulier. Une fabrication typique consiste à appliquer, par exemple au pistolet, une dispersion du produit isolant sur une aiguille nue convenablement protégée par des caches ou des masques. L'isolant se dépose sur les parties non protégées, et on fait subir à l'aiguille, après retrait des caches ou masques, un traitement thermique fixateur.The manufacture of needles does not pose any particular problem. A typical production consists of apply, for example with a spray gun, a dispersion of the insulating product to a bare needle suitably protected by covers or masks. The insulation is deposited on the unprotected parts, and the needle is subjected, after removal of the covers or masks, to a fixing heat treatment.
Dans un autre mode de réalisation, le matériau isolant contre l'oxydation n'est pas un isolant électrique, mais au contraire un conducteur électrique, par exemple de l'or ou un autre métal du même type. Dans ce cas, l'aiguille souple est revêtue avantageusement sur sa totalité et la couche d'or a de préférence une épaisseur comprise entre 0,1 et 0,5 micromètres.In another embodiment, the insulating material against oxidation is not an electrical insulator, but on the contrary an electrical conductor, for example gold or another metal of the same type. In this case, the flexible needle is advantageously coated over its entirety and the gold layer preferably has a thickness of between 0.1 and 0.5 micrometers.
Là aussi, l'aiguille revêtue d'or peut être creuse pour l'injection d'un liquide traitant.Again, the gold coated needle may be hollow for the injection of a treating liquid.
Les aiguilles seront de préférence stériles, à usage unique (aiguilles en acier inoxydable). Elles seront conditionnées par exemple sous emballage pelable.The needles are preferably sterile, single use (stainless steel needles). They will be conditioned for example in peelable packaging.
Quel que soit le matériau de revêtement, il importe que le matériau constituant l'aiguille ne soit pas en contact avec la peau. Ce sont en effet surtout des phénomènes d'oxydation électrolytique apparaissant sur l'aiguille qui entraînent la coloration en taches de rousseur là où l'aiguille a traversé la peau, coloration qui met très longtemps à se résorber ou qui, chez certains sujets, ne se résorbe plus du tout.Whatever the coating material, it is important that the material constituting the needle is not in contact with the skin. It is in fact mainly electrolytic oxidation phenomena appearing on the needle which cause the coloring in freckles where the needle has crossed the skin, coloration which takes a long time to subside or which, in some subjects, does not subside any more.
L'invention sera mieux comprise en référence aux exemples qui suivent, donnés à titre purement illustratif et non limitatif.The invention will be better understood with reference to the examples which follow, given purely by way of illustration and without limitation.
EXEMPLE 1EXAMPLE 1
A l'aide d'aiguilles d'un diamètre de 0,60 mm d'une longueur de 12,5 cm, en acier inoxydable, on réalise une électrothérapie de traitement de cellulite dans les conditions suivantes : appareil : vendu par Utrilog, Marseille courant galvanique impulsionnel de tension égale à 12 volts et d'intensité égale allant de 0 à 200 micro-ampères ; ou courant basse fréquence de 5 à 50 Hertz.Using needles with a diameter of 0.60 mm and a length of 12.5 cm, made of stainless steel, electrotherapy for cellulite treatment is carried out under the following conditions: device: sold by Utrilog, Marseille impulse galvanic current of voltage equal to 12 volts and of equal intensity ranging from 0 to 200 micro-amps; or low frequency current from 5 to 50 Hertz.
Les aiguilles sont prélevées d'un conditionnement stérile en boîtes de 70 sachets pelables de 8 aiguilles chacun avec tube protecteur individuel en polyéthylène. Elles ont été stérilisées à l'oxyde d'éthylène et sont revêtues, à 1 cm de la partie arrière, d'une couche isolante de longueur égale à 2 cm en polytétrafluoroéthylène de qualité alimentaire, inerte, biocompatible et anti-adhérent, monocouche, d'une épaisseur de 10 micromètres. Ce polytétrafluoroéthylène est vendu par Appli France sous la référence M20 et présente une pigmentation grise.The needles are taken from a sterile packaging in boxes of 70 peelable sachets of 8 needles each with individual polyethylene protective tube. They have been sterilized with ethylene oxide and are coated, 1 cm from the rear, with an insulating layer of length equal to 2 cm in food-grade polytetrafluoroethylene, inert, biocompatible and non-stick, monolayer, with a thickness of 10 micrometers. This polytetrafluoroethylene is sold by Appli France under the reference M20 and has gray pigmentation.
A l'issue du traitement d'électrothérapie, pendant lequel les électrodes aiguilles sont implantées à raison de 4 paires de 2, on ne constate aucune tache ni pigmentation à l'endroit où les 8 aiguilles ont traversé la peau.At the end of the electrotherapy treatment, during which the needle electrodes are implanted at the rate of 4 pairs of 2, there is no stain or pigmentation where the 8 needles crossed the skin.
EXEMPLE 2EXAMPLE 2
On répète le traitement de l'exemple 1 avec des aiguilles de 12 cm en acier inoxydable revêtues d'un paraxylène chloré de marque Parylène, référence C, vendues également par la société Appli France.The treatment of Example 1 is repeated with 12 cm stainless steel needles coated with a chlorinated paraxylene of the Parylene brand, reference C, also sold by the company Appli France.
Là aussi, à l'issue du traitement d'électrothérapie, on ne constate aucune apparition de pigmentation à l'endroit où les aiguilles ont traversé la peau.There too, at the end of the electrotherapy treatment, there is no appearance of pigmentation at the point where the needles crossed the skin.
EXEMPLE 3EXAMPLE 3
On procède à un traitement d'électrothérapie comme décrit à l'exemple 1, mais en utilisant des aiguilles d'acier inoxydable revêtues d'une mince couche d'or de 0,2 micromètres sur toute leur longueur. On note incidemment que l'or assure une meilleure conductivitë et facilite le passage de l'énergie électrique.Electrotherapy treatment is carried out as described in Example 1, but using stainless steel needles coated with a thin layer of gold of 0.2 micrometers over their entire length. Incidentally, it is noted that gold provides better conductivity and facilitates the passage of electrical energy.
On note surtout l'absence d'apparition de toute tache de rousseur ou "tatouage" là où les aiguilles ont traversé la peau. We especially note the absence of appearance of any freckle or "tattoo" where the needles crossed the skin.

Claims

REVENDICATIONS
1. Electrode transcutanée pour électrothérapie, constituée d'une aiguille souple implantable sous la peau, caractérisée en ce qu'elle est entourée sur une partie au moins d'un revêtement isolant contre l'oxydation, de telle sorte que la partie isolée se place après implantation de part et d'autre de l'endroit où l'aiguille traverse la peau.1. Transcutaneous electrode for electrotherapy, consisting of a flexible needle implantable under the skin, characterized in that it is surrounded on at least part of an insulating coating against oxidation, so that the isolated part is placed after implantation on either side of the place where the needle crosses the skin.
2. Electrode selon la revendication 1, caractérisée en ce que le revêtement est constitué d'une matière à la fois isolant électrique et thermique.2. Electrode according to claim 1, characterized in that the coating consists of a material which is both electrically and thermally insulating.
3. Electrode selon la revendication 1, caractérisée en ce que le revêtement est constitué d'une matière ayant des propriétés diélectriques.3. Electrode according to claim 1, characterized in that the coating consists of a material having dielectric properties.
4. Electrode selon la revendication 2, caractérisée en ce que le revêtement est en polytétrafluoroéthylène.4. Electrode according to claim 2, characterized in that the coating is made of polytetrafluoroethylene.
5. Electrode selon la revendication 2, caractérisée en ce que le revêtement est en copolymère de polytétrafluoroéthylène et de polyamide-i ide.5. An electrode according to claim 2, characterized in that the coating is made of a copolymer of polytetrafluoroethylene and of polyamide-i ide.
6. Electrode selon la revendication 3, caractérisée en ce que le revêtement est fait d'un polyparaxylène chloré. 6. An electrode according to claim 3, characterized in that the coating is made of a chlorinated polyparaxylene.
7. Electrode selon la revendication 2, caractérisée en ce que le polymère est un polymère cristallin.7. An electrode according to claim 2, characterized in that the polymer is a crystalline polymer.
8. Electrode selon la revendication 2, caractérisée en ce que le revêtement isolant a une épaisseur comprise entre 1 et 20 micromètres.8. An electrode according to claim 2, characterized in that the insulating coating has a thickness between 1 and 20 micrometers.
9. Electrode selon la revendication 2, caractérisée en ce que le revêtement isolant s'étend sur une longueur de 5 à 20 % de la longueur totale de l'aiguille.9. An electrode according to claim 2, characterized in that the insulating coating extends over a length of 5 to 20% of the total length of the needle.
10. Electrode selon la revendication 1, caractérisée en ce que le revêtement est constitué d'une matière conductrice électrique et qu'il est réalisé sur toute la longueur de l'aiguille.10. Electrode according to claim 1, characterized in that the coating consists of an electrically conductive material and that it is produced over the entire length of the needle.
11. Electrode selon la revendication 10, caractérisée en ce que le revêtement est de l'or. 11. An electrode according to claim 10, characterized in that the coating is gold.
PCT/FR1991/001005 1990-12-21 1991-12-13 Transdermal electrode for electrotherapy WO1992011061A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR90/16398 1990-12-21
FR9016398A FR2670677B1 (en) 1990-12-21 1990-12-21 TRANSCUTANEOUS ELECTRODE FOR ELECTROTHERAPY.

Publications (1)

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WO1992011061A1 true WO1992011061A1 (en) 1992-07-09

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PCT/FR1991/001005 WO1992011061A1 (en) 1990-12-21 1991-12-13 Transdermal electrode for electrotherapy

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EP (1) EP0563218A1 (en)
FR (1) FR2670677B1 (en)
WO (1) WO1992011061A1 (en)

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WO1994007565A1 (en) * 1992-10-02 1994-04-14 W.L. Gore & Associates, Inc. An implantable lead
GB2374819A (en) * 2001-04-27 2002-10-30 Sterilox Tech Int Ltd PTFE oxidation resistant coating for medical or surgical instruments

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Publication number Priority date Publication date Assignee Title
US20030216800A1 (en) * 2002-04-11 2003-11-20 Medtronic, Inc. Implantable medical device conductor insulation and process for forming
US7783365B2 (en) 2002-04-11 2010-08-24 Medtronic, Inc. Implantable medical device conductor insulation and process for forming
US8103358B2 (en) 2003-04-04 2012-01-24 Medtronic, Inc. Mapping guidelet

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US4805625A (en) * 1987-07-08 1989-02-21 Ad-Tech Medical Instrument Corporation Sphenoidal electrode and insertion method

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FR2600531A1 (en) * 1986-06-27 1987-12-31 Odam Apparatus for treating pathological states by stimulating acupuncture points
US4805625A (en) * 1987-07-08 1989-02-21 Ad-Tech Medical Instrument Corporation Sphenoidal electrode and insertion method

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994007565A1 (en) * 1992-10-02 1994-04-14 W.L. Gore & Associates, Inc. An implantable lead
US5466252A (en) * 1992-10-02 1995-11-14 W. L. Gore & Associates, Inc. Implantable lead
GB2374819A (en) * 2001-04-27 2002-10-30 Sterilox Tech Int Ltd PTFE oxidation resistant coating for medical or surgical instruments
US6752757B2 (en) 2001-04-27 2004-06-22 Sterilox Technologies International Limited Oxidation-resistant coatings
GB2374819B (en) * 2001-04-27 2004-12-01 Sterilox Tech Int Ltd Oxidation-resistant coatings

Also Published As

Publication number Publication date
FR2670677B1 (en) 1995-05-24
FR2670677A1 (en) 1992-06-26
EP0563218A1 (en) 1993-10-06

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