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Electrification attachment for an osteosynthesis implantate
| Details |
Inventors: Kraus, Werner;
Assignee:
Primary Examiner: Cohen; Lee S.
Assistant Examiner:
Attorney, Agent or Firm: Frishauf, Holtz, Goodman & Woodward
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. |
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DETAILED DESCRIPTION I claim: 1.
An attachment for converting an osteosynthesis plate (70) into an electrified osteosynthesis plate, in which the osteosynthesis plate is adapted for attachment to a bone of a patient by at least one metallic bone screw, said attachment (72) comprising at least one support body formed as an elongated, strip-like element of a dimension adapted to fit adjacent a surface of said plate; an induction pick-up coil (24, 24a, 24b) located in the body and having at least two terminals; a plurality of members (76, 78) supported by and protruding from the body forming projecting fingers adapted to grip around another surface of said plate to mechanically secure the body (74) to the plate (70); a connecting device (80) for electrical and mechanical connection to the bone screw, insulated with respect to the plate, formed on at least one of said fingers (78), said connecting device being electrically connected to at least one of said terminals, the bone screw serving as a tissue electrode for electrically connecting the one terminal to the tissue of the patient; and means for electrically connecting another of the at least two terminals to the tissue of the patient.
2.
Attachment according to claim 1, wherein the elongated body (74) is dimensioned to fit laterally along an edge of the osteosynthesis plate (70), the projecting fingers (76, 78) extending from said body (74) to fit around both flat sides of the plate (70); and some of said fingers (78) include a connecting device and an electrical connection to the coil (24; 24a; 24b) from the connecting device 80.
3.
Attachment according to claim 2, wherein two elongated elements (74a, 74b) are provided together forming said support body, one, each, adapted to fit against a lateral edge of said plate; and resilient connecting means (82) are provided for connecting said two elements together.
4.
Attachment according to claim 3 wherein the support body (74) comprises electrically insulating material.
5.
Attachment according to claim 2, wherein at least some of said fingers comprise resiliently elongatable elements (78')
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Heart Surgery 
