Electrification attachment for an osteosynthesis implantate

US4421115A · kind A · utility

Inventor

• Werner Kraus · Teublitz, DE

Key dates

• Filing date: Dec 8, 1980
• Grant date: Dec 20, 1983
• Expiry date: Dec 8, 2000

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/378
• WIPO field: Medical technology
• WIPO sector: Instruments

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.