| 摘要 |
The present invention describes an intramedullary nail for use in orthopedic surgery for the fixation of bone fractures and fusion sites. The nail employs one or more internal loaded springs, biocompatible elastic or rubber bands, or other mechanism that provides continuous dynamic compression across the healing site throughout the healing process. By altering the size, tension and/or number of the internal compression devices, the amount of compression may be customized on a case-by-case basis. Further, the slots within the nail for its attachment can be utilized to create a torsional force when desired. The nail can have a cross-sectional shape that prevents its rotation. A system and method of use is also described. |
| 主权项 |
1. An intramedullary nail for providing dynamic compression across a fusion or fracture site, comprising:
an elongated body having a proximal end, a distal end, and an inner channel; at least one distal aperture located proximate to said distal end of said body and which is capable of permitting a fastener to pass therethrough and be secured in a position transversing said nail, said at least one distal aperture comprises a first and a second distal aperture; at least one elongated aperture having interior sides located closer to said proximal end of said body than said distal aperture and which is capable of receiving a fastener that transverses said nail such that said nail may move relative to said fastener, said movement is restricted by said interior sides of said elongated aperture, said at least one elongated aperture comprises a first and a second elongated aperture; at least one compression member contained within said inner channel, said compression member having a first end and a second end, and at least one of said ends of said compression member is capable of engaging said fastener received in said elongated aperture, wherein said compression member may exert a force to move said nail relative to said fastener, while said movement is restricted by said interior sides of said elongated aperture, said at least one compression member comprises a first and a second compression member; said first end of said first compression member abuts said proximal end of said nail and said second end of said first compression member is capable of engaging a fastener received in said first elongated aperture; and, said first end of said second compression member is capable of engaging a fastener received in said second elongated aperture and said second end of said second compression member is capable of engaging a fastener received in said first distal aperture; whereby said intramedullary nail can provide compression to said fusion or fracture site when at least one fastener is received in said elongated aperture on one side of said fusion or fracture site and at least one fastener is received in said distal aperture on an opposing side of said fusion or fracture site; and, whereby both said first and second compression member exert a force to move said nail and thereby provide compression to a fusion or fracture site located between said first distal aperture and said second elongated aperture when said fasteners are received in said nail. |
