US4421115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrification attachment for an osteosynthesis implantate
Assignee: Individual
•
Filing: 1980-12-08
•
Granted: 1983-12-20
•
Expires: 2000-12-08
Abstract
Abstract 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.
Inventors
- 👤 Werner Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:00
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/40; A61B; A61B17/00; A61B17/56; A61B17/58; A61N1/18; A61N1/32; A61N1/36; A61N1/372; A61N1/378
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
193 words
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.
Claim 2
Dependent Claim
193 words
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.
Claim 3
Dependent Claim
68 words
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.
Claim 4
Dependent Claim
43 words
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.
Claim 5
Dependent Claim
14 words
Attachment according to claim 3 wherein the support body (74) comprises electrically insulating material.
Claim 6
Dependent Claim
17 words
Attachment according to claim 2, wherein at least some of said fingers comprise resiliently elongatable elements (78').
Claim 7
Dependent Claim
144 words
Attachment according to claim 2, wherein some of the protruding members forming the fingers are metallic and some have an insulating surface; the fingers are positioned at spaced locations along said body (74); and wherein the metallic fingers extend from said body at a position adapted to fit adjacent one surface of said plate; the insulated fingers extend from said body at a position adapted to fit over an opposite, parallel surface of said plate; and wherein the metal fingers and the insulating fingers are spaced from each other essentially by the thickness of the plate, and are in essential alignment with each other to provide for engaging contact by the metal fingers with one major surface of the plate and by the insulated fingers against the other major surface of the plate, said metal and insulated fingers cooperating to grip the plate therebetween.
Claim 8
Dependent Claim
14 words
Attachment according to claim 6 wherein the support body (74) comprises electrically insulating material.
Claim 9
Dependent Claim
14 words
Attachment according to claim 2 wherein the suppport body (74) comprises electrically insulating material.
Claim 10
Dependent Claim
53 words
Attachment according to claim 1, wherein the plate has a plurality of bone screw receiving openings; and some of said fingers (78) include a connecting device and an electrical connection to said coil (24; 24a; 24b) from the connecting device (80) for connection to a bone screw passing through said screw receiving openings.
Claim 11
Dependent Claim
14 words
Attachment according to claim 9 wherein the support body (74) comprises electrically insulating material.
Claim 12
Dependent Claim
94 words
Attachment according to claim 1, wherein at least some of the fingers (76) are electrically connected to the coil and have a conductive surface at the side facing said plate, and are adapted for surface engagement with said plate (70) and forming said means for electrically connecting another of the at least two terminals to the tissue of the patient; and said plate has a metallized surface in the region of surface engagement by said at least some fingers to permit establishment of electrical connection between said at least some fingers and said plate.
Claim 13
Dependent Claim
14 words
Attachment according to claim 11 wherein the support body (74) comprises electrically insulating material.
Claim 14
Dependent Claim
47 words
An attachment according to claim 1 wherein the means for electrically connecting said another of the at least two terminals comprises a metal protruding member (76) adapted to make electrical contact with an electrically conductive surface of said plate which thereby serves as a second tissue electrode.
Claim 15
Dependent Claim
53 words
An attachment according to claim 1 wherein the means for electrically connecting said another of the at least two terminals comprises a second connecting device for electrical and mechanical connection to a second bone screw insulated against the first mentioned bone screw, said second bone screw thereby serving as a second tissue electrode.
Claim 16
Dependent Claim
111 words
An attachment according to claim 1, in which there are at least three terminals on the induction pick-up coil, one of the terminals being connected to at least one of said protruding members (76), said at least one member being metallic and adapted to make electrical contact with an electrically conductive surface of said plate which thereby forms the means for electrically connecting another of the at least two terminals to the tissue of the patient, and serves as a tissue electrode; and wherein the remaining terminals are provided with respective connecting devices for electrical and mechanical connection to respective bone screws, insulated with respect to the plate and each other.
Claim 17
Dependent Claim
62 words
Attachment according to claim 1 wherein said body is formed in two parallel portions (74a, 74b), the protruding members on each body being directed generally towards the protruding members of the other body portion; and at least one resilient connecting member (82) mechanically connecting the parallel portions together, to permit mounting said parallel body portions on opposite edges of a rectangular plate.
Claim 18
Dependent Claim
14 words
Attachment according to claim 1 wherein the support body (74) comprises electrically insulating material.
Claim 19
Dependent Claim
38 words
Attachment according to claim 1 wherein the support body (74) comprises electrically conductive material and is electrically connected to said another of the at least two terminals to form an electrical connection to the tissue of the patient.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |