Other

Neue Magnetodyn Gmbh

Geot Gesellschaft Fur Elektro-osteo-therapie G.m.b.h.

Werner Kraus

Heribert Stephan

Stephanie Kraus

Hartwig Hocker

Doris Klee

Markus Wiegmann

Matthias Militz

Christian Kraus-Von Wesendonk

Stephanie Kraus-Geiges

Felix Liebrecht

Jorg Lahann

Christoph Rehberg

The invention relates to a hip joint prosthesis comprising a shaft-like section that can be inserted into a femur, and a proximally arranged end cap assembly which closes a hollow space of the hip joint prosthesis. According to the invention the end cap assembly carries a coil assembly that is connected to a first electrode with a first pole and to a second electrode with a second pole. The first and the second electrodes enclose surfaces of the hip joint prosthesis, and in a state in which the end cap assembly closes the hollow space of the hip joint prosthesis, the coil assembly is predominantly arranged in the hollow space.

Electric hip joint prosthesis

The invention relates to a device for polarizing at least two spatially separated, at least partially electrically conductive implants. The device includes a coil having a first pole and a second pole, a first contact device associated with the first pole for electrically contacting a first implant, and a second contact device associated with the second pole for electrically contacting a second implant. The coil may be arranged directly or indirectly on or in the first implant and carried by the first implant. The second contact device may include a flexible electrical line which allows the second implant to be contacted in a manner such that the coil may be arranged in a spatially separated manner from the second implant.

Polarization device and implantation device

An intramedullary nail system including an elongated nail member comprising a cavity and electrically conductive at least in part, a coil assembly, a first electrode connected to a first pole of the coil assembly and a second electrode connected to a second pole of the coil assembly. To improve such an intramedullary nail system the coil assembly is provided in an end cap assembly that is proximally releasably connected to the nail member and with at least one electrically conductive outer contact surface. At least one section of the electrically conductive outer contact surface forms the first electrode and at least one section of the nail member forms the second electrode.

Electrical intramedullary nail system

In a femoral head cap implant having a cup-shaped cap component and a pin fixed to its concave inner surface, a pick-up coil is arranged in the latter, each respective terminal of the same being connected to a tissue electrode. One tissue electrode comprises a cap component, the other an electrode provided insulated on the pin or on at least one part of the pin which is electrically insulated from the cap component. By inducing a low-frequency alternating current in the pick-up coil by means of an external coil, this low-frequency alternating current flows from the two tissue electrodes through the femoral head bone provided with the implant, thereby promoting the maintenance of its vitality.

Femoral head cap implant including a device for electrically stimulating tissue

The invention relates to an apparatus for stimulating a healing process comprising a coil arrangement which is coupled to a functional power generator in order to generate an electromagnetic field in an affected body region, a control unit for influencing a voltage curve generated by the functional power generator in accordance with signals transmitted to an input interface of the control unit, a sensor array for sensing a characteristic of the affected body region, transmission device which is coupled to the sensor array in order to transmit a signal characteristic of the detected characteristic of the affected body zone to the control unit.

Apparatus for stimulating a healing process

The invention relates to an implantable device to be fixed to a bone and comprising an electrically conductive base body provided with at least two through holes and at least one pair of shaft-shaped contact means, wherein each contact means passes through a through hole of the base body and penetrates a section of the bone in an implanted state, wherein the surface of each contact means comprises a first and a second electrically conductive surface section as well as an electrically insulating surface section separating the electrically conductive surface sections from each other, wherein the first electrically conductive surface section electrically contacts the base body while the second electrically conductive surface section is electrically insulated with respect to the base body, wherein each contact means contains a coil arrangement in its interior by means of which the electrically conductive surface sections of each contact means are electrically coupled, and wherein the coil arrangements of a pair are wound in opposite directions.

Implantable device, system for generating localised electromagnetic fields in the area of an implant and coil arrangement

Bone screw ( ) having a hollow, tubular shaft ( ) consisting of metal, such as titanium, the shaft having a head ( ) at one end and a self-tapping external thread ( ) at the other end. The head ( ) has a hexagonal recess ( ) for inserting a turning tool. An electrically insulated metallic end-piece ( ) which tapers in the direction of the end in the form of a cone or pointed arch, is inserted the other end of the shaft ( ). A receiving coil ( ) is located in the hollow shaft ( ), the terminals ( ) of the coil being electrically coupled to the shaft ( ) and to the end-piece ( ). The space between the end-piece ( ) and the end of the shaft ( ) as well as the interior of the shaft ( ) are filled with a biocompatible insulating compound ( ), such as an epoxy resin. A low-frequency electric voltage can be induced in the receiving coil by an external primary coil which is coupled to an oscillation generator. The electric voltage generates a growth-promoting current in the surrounding tissue, the shaft and the end-piece acting as tissue electrodes (stimulation method according to Kraus and Lechner).

Bone screw comprising a device for electrostimulation

The invention relates to polymer-coated stents, processes for their production and their use for restenosis prevention.

Polymer-coated stents, processes for producing the same and their use for restenosis prevention

Implantable device, such as a femoral head prosthesis, with a body (12) of biocompatible material shaped to suit its medical function, which forms an internal cavity (16) and has open apertures (18) that lead from the cavity (16) to the outside. The cavity (16) serves to receive spongiosa or other biological material into which the tissue that surrounds the implanted device is intended to grow through the apertures (18). The device is provided with at least two electrodes (30, 32), at least one of which is located in the cavity (16) spaced apart from the inside of the body (12) that forms the cavity (16). The electrodes are provided with an arrangement for supplying a low-frequency alternating voltage, so that by means of the supplied voltage a low-frequency electrical alternating field and a low-frequency alternating current, whereby the tissue growth is promoted, are created inside the cavity (16).

Implantable device having an internal electrode for stimulating growth

Applicator coil for an electromagnetic therapy apparatus, which has substantially the form of a zone of a sphere deformed into an oval and which is suited above all to rendering a low frequency magnetic alternating field operative on projecting parts of the human or animal body, such as the shoulder region or the face of the person.

Applicator coil for magnetic field therapy

An electromedical apparatus for generating low-frequency magnetic fields for magnetic field therapy or treatments by the Kraus & Lechner method includes an oscillator and amplifier (10, 12) for generating low-frequency electrical oscillations of adjustable frequency and amplitude, and at least one applicator coil (32) for generating a low-frequency magnetic field corresponding to the electrical oscillations. Switching on of the apparatus and initiation of a treatment cycle is by actuating a single key switch (56, 58). The apparatus is normally switched off after expiry of a treatment period by a time switching device (80) but it can also be switched off by a fault detection circuit (88) which automatically switches the apparatus off on occurrence of disturbances. With this step operating errors and damage to the apparatus by disturbances are avoided even when the apparatus is used by laymen at home without supervision.

Electromedical apparatus for generating low-frequency magnetic fields

An implantable device for the stimulation of bone growth, the device having an elongated pickup coil arrangement that is provided with connectors for tissue electrodes. An extended and strip-like tissue electrode extends from the pickup coil arrangement and the connectors have a hole for a bone screw and a sleeve-like extension adapted to accommodate a Kirschner wire electrode.

Implantable device for the stimulation of bone growth

To permit electric stimulation of tissue and specifically bone tissue to which an osteosynthesis plate or a bone nail has been attached, and provide electrical energy by induction from an external induction coil, a support body 22, 110, 222 is provided for attaching association with the osteosynthesis implantate; at least one induction coil 24, 118, 224 is embedded in, or secured to the body, electrodes 28, 36, 80, 118a, 228, 236 are connected to the windings of the coil, one of which is connectable with a conductive portion of the osteosynthesis implantate, the other electrode being exposed to bone tissue or soft tissue of the patient. When used in association with a hollow, slotted bone nail (FIGS. 1 to 6, 12 to 24), the implantate can be constructed as an elongated plastic rod which can be introduced into the bone nail, one electrode protruding therefrom and making contact with the bone nail, the rod being of plastic which can be cut to length to fit the length of the bone nail; when the implantate is a plate (FIGS. 9 to 11), the windings can be included in a strip arranged for slipping on and clamping around the edge of the plate, with projecting electrode connections.

Electrification attachment for an osteosynthesis implantate

To permit electric stimulation of tissue and specifically bone tissue to which an osteosynthesis plate or a bone nail has been attached, and provide electrical energy by induction from an external induction coil, a support body 22, 110, 222 is provided for attaching association with the osteosynthesis implantate; at least one induction coil 24, 118, 224 is embedded in, or secured to the body, electrodes 28, 36, 80, 118a, 228, 236 are connected to the windings of the coil, one of which is connectable with a conductive portion of the osteosynthesis implantate, the other electrode being exposed to bone tissue or soft tissue of the patient. When used in association with a hollow, slotted bone nail FIGS. 1 to 6, 12 to 24), the implantate can be constructed as an elongated plastic rod which can be introduced into the bone nail, one electrode protruding therefrom and making contact with the bone nail, the rod being of plastic which can be cut to length to fit the length of the bone nail; when the implantate is a plate (FIGS. 9 to 11 ), the windings can be included in a strip arranged for slipping on and clamping around the edge of the plate, with projecting electrode connections.

Electrification attachment for an osteo-synthesis implantate

A long-term endoprosthesis in which a relatively large part of the surface, which in the implanted condition makes contact with the bone of the wearer of the implant, is provided with electrodes. These electrodes are connected with a source of a low frequency electrical voltage and are so arranged that they alternate with relatively short spacings in the contact zone. The electrode spacing preferably decreases in size in accordance with the size of the mechanical area loading on the corresponding part of the contact area, that is to say, the greater the loading, the smaller the spacing.

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Munich, Germany

Werner Kraus