DE1440559B2 - TREATMENT ELECTRODE TO BE CONNECTED TO A HIGH FREQUENCY GENERATOR - Google Patents

Description

3 4

Electrode and the object can be specified in such a way that at very short object distances there is

that in the entire usual work area, the fact that the object to be treated is too large,

radiated power remains essentially constant. harmful high frequency dose is administered when

In FIG. 1 is a longitudinal section and in which the high-frequency generated by the high-frequency generator

F i g. 2 in a plan view of the open end of the electrical frequency power remains constant. To this

To avoid a treatment electrode according to the invention, the electrode according to FIG. 1 and 2

for example shown. designed in such a way that their base point resistance increases quickly.

The outer conductor of the electrode consists of an ohmic value and the radiated high sheet metal cylinder 1, one end of which is open. The frequency output drops accordingly if the inner conductor of the electrode consists of two sheet metal io _.,. ,. , _x,,, ...;. ,. ,, _n . , strips 16, 17, which run parallel to the face and the object distance drops _{below the value y.} The ones from the

with the inner or outer conductor of a concentric cylinder protruding by a certain amount

λ "" ui οι · ♦ ι u λ -je- ^ i tr sheet metal strips 18, 19 and the strip attached to them

Connection line 3 are connected. A -r -long Ver _c "·," * ,, _, "··, · ι T ₇ , j _o j ·> m ι * j

^& 4 ° fen 21,22 have the consequence that the electrode

thickung3a of the inner conductor of the power line forms 15 is very heavily capacitively loaded when the object is the transformation element for the adaptation of the electrical,. J ₁₁ . , A. _iT ^ "" ,. ■ * .., trode to the wave resistance of the power line. ^{distance klemer than} ΊΓ ^{lst The} base point resistance The capacitive connection between the inner then quickly takes on high resistance values, and the conductor and the outer conductor of the electrode is through so that the sheet metal strips 18,19 removed from the high frequency generator are created, which are parallel to the 20 High frequency power drop sharply. The sheet-metal strips 18, 19 and not only protrude into the cylinder, but also 21, 22 can be achieved through the cylinder jacket surface 1 of the outer conductor, which are suitably dimensioned so that they protrude from the cylinder to the front. In the case of a high-frequency power recorded by an object with a weider-like electrode, the lowering of the object distance from the distance only changes insignificantly if the distance between the object is 25 _x , A, .. ^ ₁₁ * ^. 1 - _Li j * u · t. action properties of the electrode to about T ^{was initially constant from bIeibt and only at very}

a value of A is changed. The high-frequency small object distance drops.

8 ^{& H} The electrode opening is expediently with a generator then works practically on a constant insulating, low-loss plastic cover 20 consumer resistance and gives off the same high-frequency power with each object 30 closed (indicated by dash-dotted lines in FIG. 1), distance. This is done in order to prevent the object to be treated from coming into contact with the result otherwise only by means of special regulating the inner parts of the electrode. Such a plastic cover can at the same time serve as a high-frequency power taken up by the object to be treated, but only serve as a support surface for the patient. In the case of depending on the object distance, that is, it takes 35 electrode according to FIG. 1, the cover 20 is so steadily closed when the treatment object approaches the electrode that it makes the space inaccessible, and it decreases when it moves away from the waste that can be transferred into the object. Energy begins.

1 sheet of drawings

Claims (3)

1 2 form, the hollow body is provided with an opening, in the plane of which at least approximately the inner conductor is laid. Such an electrode is particularly suitable for using electromagnetic waves 1. Connect to a high frequency generator 5 frequencies above 300 MHz and stand out ßende treatment electrode for the production of everything in that its construction principle allows high-frequency field for heating through the spatial dimensions of the electrode in ge-substances, Especially of biological tissues, given frequency of the exciting current in wide in which, starting from a per se known limit, to be chosen arbitrarily, so that the designer electrically conductive structure that consists of a 10 in a simple manner a high frequency generator Planar inductance representing hollow body different treatment cases optimally appropriate (Outer conductor) and one inside the hollow body electrodes can be assigned. per arranged component (inner conductor) consists, with such an electrode is the operational Ends in cooperation with the moderate foot point resistance, which is a determining factor adjacent parts or inner approaches of the 15 for the high-cave body emitted by the high-frequency generator the resonant circuit capacity of the pot frequency energy, not constant, but amount and form a circle, the hollow body with an opening phase of this complex resistance change accidentally is, in the plane of which is at least approximately significant with the distance from the object to be treated the inner conductor is laid, according to patent 1,054,194, from the electrode. But that means that the characterized in that radiofrequency energy delivered to the 20 from the electrode Ends of the inner conductor (16, 17) arranged, which changes greatly with the object distance. Outer conductor plate capacitor-like opposite- To remedy this disadvantage, will be discussed in further Sheet metal strips (18, 19) over the edges formation of the invention such a Dimensjonierung the opening in the outer conductor for treatment of the electrode aimed to make its operational project by a certain amount towards the object. 25 Base point resistance when the distance of the 2. Treatment electrode according to claim 1, since the object remains practically constant. The right one characterized in that the electrode is matched to the metal strip on the high-frequency generator (18,19) runs parallel to the inner conductor (16,17) then in any case radiates independently of the object fender, additional plate-shaped metal parts (21, spaced the entire power off that of the high-22) are arranged. 3 ° frequency generator capable of delivering. The one from the object 3. The portion of that consumed by the electrode to be connected to a high-frequency generator Treatment electrode for generating a radiated high frequency power is then a function high-frequency field for warming up the object distance. Substances, especially those of biological tissues, when solving this problem, one must rely on the in which, based on a per se known 35 knowledge assumed that the magnetic field with electrically conductive structure resulting from an increasing approach of the object to be treated planar inductance representing hollow body to the electrode is changed in such a way that a connection (outer conductor) and one inside the hollow tuning of the pot circle opposite the generator body arranged component (inner conductor), frequency occurs. the ends of which in cooperation with the 40 This defect becomes in a treatment electrode neighboring parts or inner approaches of the type mentioned helped that Hollow body the resonant circuit capacity of the pot arranged at the ends of the inner conductor, the Form a circle, the hollow body provided with an opening facing the outer conductor like a plate capacitor is, in the plane of which at least approximately de sheet metal strips over the edges of the opening im / jf ' the inner conductor is laid, according to patent 1 054 194, 45 outer conductor towards the object to be treated by a ^ - * in particular according to claim 1 or 2, thereby projecting the correct amount. This also makes a characterized in that the opening of the pot increases the capacity to the object to be treated circle exposed inner parts of the electrode reached through, and there is a reaction on the an insulating cover (20), preferably made of an electric field, which protects against approaching the upper part of the body low-loss plastic, detuning from the treatment object to the electrode are separated. pensed so that the on the object to be treated off radiated power regardless of the distance between the electrode and the object in the usual ar- working range remains essentially constant. The We- 55 kung can be increased within the scope of the invention in that parallel to the sheet metal strips The main patent 1 054 194 relates to an additional plate-shaped handle extending to the inner conductor treatment electrode for generating a high-frequency metal part are arranged. Field for the heating of substances, in particular the invention according to the main patent can also those of biological tissues, which are thereby characterized, as is the case with the present additional invention is that starting from one per se are formed that the edge is formed by opening the pot electrically conductive structure, which consists of a circle exposed inner parts of the electrode by a a hollow body insulating cover which represents a flat inductance, preferably made of a verper (Outer conductor) and one in the interior of the low-hollow plastic, removed from the treatment room arranged component (inner conductor) consists, 65 are separated. This measure makes it possible to make its ends inaccessible in cooperation with those in which it is concerned adjacent parts or inner approaches of the hollow - the waste of the energy that can be transferred into the object body begins the resonant circuit capacity of the pot circle, so that the minimum distance between the