Locking cap for medical implants
First Claim
1. A locking cap for driving into a bone to lock an implanted medical device within a bone by engaging a proximal end of said device and fastening said cap to a bone, comprising:
- an elongate cylindrical member having helical outer threads about its cylindrical periphery, a driving end and a longitudinally opposed driven end, said outer threads having an outer thread pitch;
an elongate cylindrical socket for receiving said proximal end of said medical device, said socket being concentrically disposed within said cylindrical member driven end and said socket having an inner diameter which is sufficient to allow engagement of said proximal end of said medical device; and
driving means forming an integral part of and disposed at said cylindrical member driving end for driving said locking cap into said bone.
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0 Petitions
Accused Products
Abstract
A locking cap for anchoring an implanted medical device within a bone (such as an intramedullary fixation rod) has a cylindrical, helically threaded body, a socket concentrically disposed in one end, and an interface for cooperating with a driving tool, such as a wrench or screwdriver. Once a device such as an intramedullary fixation rod has been implanted within a bone, the locking cap is implanted by being threaded into the bone with a driving tool, its socket engaging the near end of the device. The socket of the locking cap can be smooth, or it can be threaded so as to thread onto the near end of the device as the cap is threaded into the bone. If threaded, the pitch of the cap'"'"'s outer threads can exceed the pitch of the inner threads so that the cap advances into the bone more quickly than it advances onto the end of the device. Alternatively, the inner thread pitch can exceed, or equal, the outer thread pitch so that the cap advances into the bone more slowly than, or at the same rate as, it advances onto the end of the device, respectively.
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Citations
44 Claims
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1. A locking cap for driving into a bone to lock an implanted medical device within a bone by engaging a proximal end of said device and fastening said cap to a bone, comprising:
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an elongate cylindrical member having helical outer threads about its cylindrical periphery, a driving end and a longitudinally opposed driven end, said outer threads having an outer thread pitch; an elongate cylindrical socket for receiving said proximal end of said medical device, said socket being concentrically disposed within said cylindrical member driven end and said socket having an inner diameter which is sufficient to allow engagement of said proximal end of said medical device; and driving means forming an integral part of and disposed at said cylindrical member driving end for driving said locking cap into said bone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An osteal implant for anchoring an implanted medical device within a bone by engaging a proximal end of said device and fastening said implant to a bone, comprising:
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an elongate cylindrical member having helical outer threads about its cylindrical periphery, a driving end and a driven end, said outer threads having an outer thread pitch; an elongate cylindrical threaded socket for receiving said proximal end of said medical device, said socket being concentrically disposed within said cylindrical member driven end and said socket having an inner diameter which is sufficient to allow engagement of said proximal end of said medical device, and wherein said cylindrical member outer thread pitch and said socket inner thread pitch are like-handed, and said cylindrical member outer thread pitch is greater than said socket inner thread pitch; and driving means disposed at said cylindrical member driving end for driving said implant into said bone. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. An osteal implant for anchoring an implanted medical device within a bone by engaging a proximal end of said device and fastening said implant to a bone, comprising:
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an elongate cylindrical member having helical outer threads about its. cylindrical periphery, a driving end and a longitudinally opposed driven end, said outer threads having an outer thread pitch; an elongate cylindrical threaded socket for receiving said proximal end of said medical device, said socket being concentrically disposed within said cylindrical member driven end and said socket having an inner diameter which is sufficient to allow engagement of said proximal end of said medical device; a hole disposed within said cylindrical member driving end and said hole connecting to said socket, whereby said hole provides access to said socket for a set screw to engage said proximal end of said medical device; and driving means forming an integral part of and disposed at said cylindrical member driving end for driving said implant into said bone. - View Dependent Claims (40, 41, 42, 43, 44)
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Specification