Patent US2129662A successfully refreshed from Google Patents.
Patent US4873572A successfully refreshed from Google Patents.
Patent US3709218A successfully refreshed from Google Patents.
US3709218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination intramedullary fixation and external bone compression apparatus
Assignee: Individual
•
Filing: 1970-04-24
•
Granted: 1973-01-09
•
Expires: 1990-04-24
Abstract
Abstract A combination intramedullary fixation and external bone compression apparatus for applying fixation and compression to a bone which has been fractured transversely to form two longitudinal fragments. Such fixation device includes an elongated intramedullary rod for extending substantially the full length of the intramedullary canal of the fractured bone. The intramedullary rod includes a plurality of longitudinally spaced through transverse screw-receiving slots. A compression device is provided which includes a plate for being disposed exteriorally of the bone and spanning the fracture. Such plate includes screwreceiving bores disposed on opposite sides of the fracture whereby an incision may be made in the injured limb adjacent the fracture and the rod inserted through such incision and into the intramedullary canal off one of the bone fragments. The rod may then be driven into the intramedullary canal to drive the leading end of the rod out of one end of the bone fragment sufficiently far to cause the trailing end of such rod to be totally received within such one fragment. Thereafter, the bone fragments may be set and the projecting end of the rod driven back into the intramedullary canal to drive the opposite end of the rod into the second bone fragment to thereby cause such rod to span the fracture and provide support against transverse shifting of the two bone fragments. Thereafter, the compression plate may be placed on the exterior of the bone spanning the fracture and the fracture put in compression. Holes may then be drilled in the bone wall on opposite sides of the fracture and in alignment with the screw-receiving bores in the compression plate and certain of the slots in the rod and screws inserted to maintain the fracture in compression.
Inventors
- 👤 W Halloran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:42
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/72
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
292 words
Combination intramedullary fixation and external bone compression apparatus for use with a bone that has been fractured medially into longitudinal fragments, said apparatus comprising: an elongated intramedullary rod of substantially regular longitudinal cross section for extension longitudinally through the intramedullary canal of said bone to span the fracture site and including a plurality of longitudinally spaced, through, transverse screw-receiving slots elongated in the longitudinal direction of said rod; a compression device including plate means for being disposed exteriorly of said bone in spanning relationship over said fracture, compression anchor means including pins adapted to be connected on their respective one ends with said plate means in longitudinal spaced apart relationship for being inserted slidingly through respective ones of said slots and being formed on their ends opposite said one ends with fastener means, said anchor means further including individual fasteners for fastening to said respective fastener means; said slots having a cross section in the longitudinal direction of said rod at least twice the corresponding cross section of said pins for accommodating longitudinal shifting of said pins with respect to said rod whereby after said rod is inserted in said intramedullary canal to span said fracture site to support the bone segments on opposite side of said site from shifting transversely with respect to one another, a hole may be drilled in said bone on one side of said fragment in alignment with one of said slots, one of said pins inserted therein, said bone segments drawn together to compress said fracture site, said one slot accommodating longitudinal shifting of said one pin and a second hole drilled in said bone on the opposite side of said site and the other of said pins inserted to hold said fracture in longitudinal compression.
Claim 2
Dependent Claim
292 words
Combination intramedullary fixation and external bone compression apparatus for use with a bone that has been fractured medially into longitudinal fragments, said apparatus comprising: an elongated intramedullary rod of substantially regular longitudinal cross section for extension longitudinally through the intramedullary canal of said bone to span the fracture site and including a plurality of longitudinally spaced, through, transverse screw-receiving slots elongated in the longitudinal direction of said rod; a compression device including plate means for being disposed exteriorly of said bone in spanning relationship over said fracture, compression anchor means including pins adapted to be connected on their respective one ends with said plate means in longitudinal spaced apart relationship for being inserted slidingly through respective ones of said slots and being formed on their ends opposite said one ends with fastener means, said anchor means further including individual fasteners for fastening to said respective fastener means; said slots having a cross section in the longitudinal direction of said rod at least twice the corresponding cross section of said pins for accommodating longitudinal shifting of said pins with respect to said rod whereby after said rod is inserted in said intramedullary canal to span said fracture site to support the bone segments on opposite side of said site from shifting transversely with respect to one another, a hole may be drilled in said bone on one side of said fragment in alignment with one of said slots, one of said pins inserted therein, said bone segments drawn together to compress said fracture site, said one slot accommodating longitudinal shifting of said one pin and a second hole drilled in said bone on the opposite side of said site and the other of said pins inserted to hold said fracture in longitudinal compression.
Claim 3
Dependent Claim
35 words
Combination intramedullary fixation and bone compression apparatus as set forth in claim 1 wherein: said intramedullary rod is at least 10 inches long to project a substantial distance through the medial portion of said bone.
Claim 4
Dependent Claim
32 words
Combination intramedullary fixation and bone compression apparatus as set forth in claim 1 wherein: said intramedullary rod is at least 15 inches long to extend substantially the full length of said bone.
Claim 5
Dependent Claim
42 words
Combination intramedullary fixation and bone compression apparatus as set forth in claim 1 wherein: said intramedullary rod is formed on its opposite extremities with self broaching grooves to thereby eliminate the necessity of reaming said intramedullary canal before said rod is inserted.
Claim 6
Dependent Claim
29 words
Combination intramedullary fixation and bone compression apparatus as set forth in claim 1 wherein: said slots occupy at least 50 percent of the medial portion of said intramedullary rod.
Claim 7
Dependent Claim
39 words
Combination intramedullary fixation and bone compression apparatus as set forth in claim 1 wherein: said intramedullary rod is circular in cross section to complimentally fit the cross section of said intramedullary canal and to resist bending in all planes.
Claim 8
Dependent Claim
56 words
Combination intramedullary fixation and bone compression apparatus as set forth in claim 1 wherein: said intramedullary rod is at least 15 inches long to project Throughout the medial portion of said intramedullary canal and to remain projecting from one end of said bone for convenient access after said fracture has healed without cutting through said bone.
Claim 9
Dependent Claim
84 words
Combination intramedullary fixation and bone compression apparatus as set forth in claim 1 wherein: said intramedullary rod is at least 10 inches long whereby said rod may be inserted through the incision at said fracture site and into the intramedullary canal of one of said bone fragments in a retrograde manner and drive, out said one extremity of said bone, said fracture set, the projecting end of said rod driven back into said intramedullary canal to drive said rod into the other bone fragment.
Claim 10
Dependent Claim
29 words
Combination intramedullary fixation and bone compression apparatus as set forth in claim 1 wherein: said intramedullary rod is substantially one half inch in cross section and 18 inches long.
Claim 11
Dependent Claim
36 words
Combination intramedullary fixation and bone compression apparatus as set forth in claim 1 wherein: said slots are at least four times as long in longitudinal cross section as the longitudinal transverse cross section of said pins.
Claim 12
Dependent Claim
143 words
Intramedullary fixation apparatus for applying intramedullary fixation to a fractured bone while retaining fractured bone segments against telescoping together at the fracture site, said apparatus comprising: an elongated intramedullary fixation rod for extension longitudinally through the intramedullary canal of said bone and having a sufficient transverse cross section to extend substantially across the cross section of said canal to engage the opposite sides thereof at the fracture site to span the fracture site, said rod being formed with a plurality of longitudinally spaced through screw-receiving slots; a hold-down plate for being disposed exteriorly of said bone at said fracture site; a pair of screws connectable with said hold-down plate and extendable through respective ones of said slots and through a fractured bone to cooperate with said hold-down plate and said bone to support said bone segments against telescoping together at said fracture site.
Claim 13
Dependent Claim
143 words
Intramedullary fixation apparatus for applying intramedullary fixation to a fractured bone while retaining fractured bone segments against telescoping together at the fracture site, said apparatus comprising: an elongated intramedullary fixation rod for extension longitudinally through the intramedullary canal of said bone and having a sufficient transverse cross section to extend substantially across the cross section of said canal to engage the opposite sides thereof at the fracture site to span the fracture site, said rod being formed with a plurality of longitudinally spaced through screw-receiving slots; a hold-down plate for being disposed exteriorly of said bone at said fracture site; a pair of screws connectable with said hold-down plate and extendable through respective ones of said slots and through a fractured bone to cooperate with said hold-down plate and said bone to support said bone segments against telescoping together at said fracture site.
Claim 14
Dependent Claim
32 words
Intramedullary fixation apparatus as set forth in claim 11 wherein: said intramedullary rod is at least three-eighths of an inch in diameter to substantially fill the medial portion of said intramedullary canal.
Claim 15
Dependent Claim
31 words
Intramedullary fixation apparatus as set forth in claim 11 wherein: said intramedullary rod is at least 15 inches in length to project substantially throughout the medial portion of said intramedullary canal.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |