US3244170A - Compression type bone splint - Google Patents

Compression type bone splint Download PDF

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US3244170A
US3244170A US23945662A US3244170A US 3244170 A US3244170 A US 3244170A US 23945662 A US23945662 A US 23945662A US 3244170 A US3244170 A US 3244170A
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bone
bar
splint
fracture
fastener elements
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Robert T Mcelvenny
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Robert T Mcelvenny
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8004Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for extending or compressing the bone or bones
    • A61B17/8019Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for extending or compressing the bone or bones where the means are a separate tool rather than being part of the plate
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72Intramedullary pins, nails or other devices
    • A61B17/7216Intramedullary pins, nails or other devices for bone lengthening or compression
    • A61B17/7225Intramedullary pins, nails or other devices for bone lengthening or compression for bone compression
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72Intramedullary pins, nails or other devices
    • A61B17/7291Intramedullary pins, nails or other devices for small bones, e.g. in the foot, ankle, hand or wrist

Description

April 5, 1966 R. T. MOELVENNY 3,244,170

COMPRESSION TYPE BONE SPLINT Filed Nov. 23, 1962 3 Sheets-Sheet 1 a 5 o Z4 a Zyl a IZ z3 0) 5g I l l ,/,H -UUWIIC il? llltul 3g April 5, 1966 R. 1'. MCELVENNY 3,244,170

COMPRESSION TYPE BONE SPLINT Filed Nov. 23, 1962 5 Sheets-Sheet 2 106 ya' E Q j 104 Z0 ty l 1 i l f4 www" fj April 5, 1966 v R. T. MCELVENNY 3,244,170

COMPRESSION TYPE BONE SPLINT Filed Nov. 23, 1962 3 Sheets-Sheet 3 1Z0 fio 116 llL/l 155 J5 lf3 ..145 J M J4@ J4@ .140

.150 14 55 133 JM @715 ,425 J4@ United States Patent O 3,244,170 CGMPRESSION TYPE BONE SPLINT Robert T. McElvcnny, 720 N. Michigan Ave., Chicago, nl. Filed Nov. 23, 1962, Ser. No. 239,456 12 Claims. (Cl. 12S-92) This invention relates generally to medical appliances and more particularly to splints for extramedullary fixation of fractured bones.

In the past, bone splints have been made in the form of a metal bar or plate adapted for direct attachment to a broken shaft bone bridging the fracture therein. However, these prior art bone splints have been ordinarily connected to the bone in only a loose fashion in order to allow the related muscles to pull the bone fragments together for knitting, the splint acting principally as a guide for insuring proper movement of the bone fragments. Because of this loose connection, occasion-s have arisen wherein the intended result has miscarried, even to the extent of the fracture not healing because of insufficient contact of the broken surfaces.

Therefore, an important object of the present invention is to provide a bone splint which is arranged to establish and preserve forcible engagement of the broken surfaces independently and irrespective of the contracting action of the related muscles.

A more general object of the invention is to provide a new and improved bone splint arrangement.

Another object of the invention is to provide a splint appliance that is arranged to promote and accelerate the healing of a fractured bone.

Still another object of the invention is to provide a bone splint that is arranged to preserve a selected degree of axial compression in the bone to which it is attached.

Yet another object of the invention is to provide a compression type bone splint arrangement which acts to resist torsional stresses applied to the bone.

A further object of the invention is to provide a bone splint arrangement which affords substantial freedom in the use of the body member that includes the fractured bone.

A yet further object of the invention is to provide a compact bone splint arrangement.

And a yet further object of the invention is to provide a new and improved method of positioning the fractured ends of a bone.

These and other objects and features of the invention will become more apparent from a consideration of the following disclosure.

A splint structure in accord with the invention includes a rigid bar adapted to be placed in contact with the sur- Aface of a bone, aligned parallel with the axis thereof and disposed overlapping a fracture therein, the splint structure further including means on the rigid bar defining transverse walls or edges and an open region longitudinally inwardly of each of such walls or edges, the open regions being adapted to pass fastener elements radially into the bone and the walls or edges being spaced apart for situation respectively on the opposite sides of a fracture in the bone whereby to provide abutments which cooperate with the fastener elements in preserving compressive forces drawn axially into the bone for` the purpose of causing intimate contact between the surfaces of the fracture in the bone.

In order that the principles of the invention may be readily understood, several embodiments thereof, but to which the application is not to be restricted, are shown in the accompanying drawings wherein:

FIG. 1 is a top plan view of a `splint bar constructed in accordance with the invention and shown in approximately actual size;

FIG. 2 is a top plan View showing the splint bar of FIG. 1 loosely attached to a fractured bone in preparation for drawing the bone fragments together;

FIG. 3 is a side elevational view in longitudinal crosssection of the arrangement of FIG. 1, a tensioning device being shown assembled in place;

FIG. 4 is a view similar to the showing of FIG. 3 but illustrating the bone fragments having been drawn into intimate contact by use of the tensioning device;

FIG. 5 is a top plan View showing the tensioning device rotated to the side into non-obstructing relationship with the splint bar whereby to facilitate iirm attachment of the splint bar to the fractured bone;

FIG. 6 is a side elevational view taken substantially along the line 6-6 of FIG. 5;

FIG. 7 is a view similar to the showing of FIG. 6 but illustrating nal positioning of the splint bar and removal of the tensioning device;

FIG. 8 is an end elevational View taken in central crosssection and illustrating rotation of the tensioning device from the position shown in FIG. 4 to that shown in FIG. 5;

FIG. 9 is an enlarged perspective view of a key member used in conjunction with the splint bar of FIG. 1 for use in resisting torsional stresses applied to the bone fragments positioned by means of the splint bar;

FIG. 10 is an enlarged View taken substantially along the line 10-10 of FIG. 7;

FIG. 11 is an enlarged perspective view of one of the shoes incorporated in the tensioning device of FIGS. 3-6 and 8;

FIG. 12 is a top plan view of a modified splint bar constructed in compliance with the invention;

FIG. 13 is a top plan View of a further modified embodiment of the invention;

FIGS. 14 and 15 are side elevational views of a modified bone splint arrangement, FIG. 14 showing attachment of a tensioning device and FIG. 15 showing assembling of a combined splint bar and key member to the broken bone the fragments of which have been drawn into intimate contact by means of the tensioning device;

FIG. 16 is a fragmentary, side elevational view of the arrangement of FIG. 15 taken in central cross-section and illustrating final attachment of the splint bar and key member and removal of the tensioning device; and

FIG. 17 is an enlarged perspective view of the splint bar and key member of FIGS. 14-16.

Referring now in detail to the drawings, specifically to FIG. l, a splint bar indicated generally by the numeral 20 is constructed in accord with the invention to include a shallow channel 22 opening longitudinally from the top surface thereof. Within the margins of the channel 22, the bar 20 is perforated with longitudinally extendi ing slots 24, 26 and 28, slot 26 being disposed centrally of the bar and intermediate the slots 24 and 28. In addition, the slots 24 and 2S dene distal walls 30 and proximal walls 32 at their respective opposite ends; and adjacent the far ends of the bar, open regions taking the form of circular apertures 34 and 36 are situated longitudinally outside or beyond the distal walls 3) of the slots 24 and 28. The edges of the apertures 34 and 36 dene transverse walls 38 a-t their longitudinally outermost portions for purposes which will be described more fully hereinafter.

In order that it may be rigid, the splint bar 20 is fabricated from a suitable metal or alloy. Certain stainless steels and certain magnesium alloys have proved useful in this regard. l

The splint bar 20 is intended to be connected to a fractured bone using fasteners which are fabricated from a similar metal; and turning to FIG. 2, a shaft bone 40 is seen divided into two fragments by a fracture 42. The fracture 42 defines irregular surfaces 44; and in order to position these surfaces in intimate contact for healing, the splint bar 20 is placed in contact with the surface of the bone 40, aligned parallel with the axis, thereof, and

isposed overlapping the fracture 42. The splint bar 20 is loosely connected to the bone iti by means of selftapping screws 46 which are directed radially into the bone 40 through the slots 24 and 2S respectively. The screws 46 are located medially of their respectively slots or toward the distal ends thereof in order to accommodate the movements of the bone fragments which are necessary to cause intimate contact between the surfaces 44 of the fracture. Furthermore, the screws 46 are not turned down tightly against the splint bar whereby to facilitate such movements.

With reference to FIG. 3, the self-tapping screws 46 are seen to include threaded and tapered shanlcs 48 and heads 50, the heads i) being diametrically slotted in the conventional manner as is shown in FIG. 2. The heads Si) define exposed enlarged portions which, being of greater transverse dimension than the respective slots 24 and 28, are capable of holding the splint bar loosely in place on the bone 40. Moreover, the exposed enlarged portions defined by the heads 50 are susceptible to use as mounting sites for a tensioning device 52.

The tensioning device 52 includes a lrail 54, a traveling carriage 56, a iixable carriage 58 and shoes 60. The carriages 56 and 58 are slotted to slide on the rail 54, and the rail is provided with a heel 62 at the end adjacent carriage 56. Furthermore, the carriage 56 is fashioned with a threaded bore 64 for receipt of the cooperatively threaded shank of a bolt 66, and the heel 62 is apertured to receive a bushing 63 in axial alignment with the bore 64, bushing 68 acting to journal the bolt 66 in the heel 62. Advantageously, a knurled knob 70 is coupled to the bolt 66 outside the heel 62 in order to facilitate manual turning of the bolt for aggressively and progressively altering the position of carriage 56 on the rail 54.

In order that the carriage 53 may be fixed in a selected position on the rail 54, the slot in the carriage is widened to accommodate a foot 72; and a Wingbolt 74 is passed through a threaded bore in the top of carriage 58, the lower end of the wingbolt engaging the foot 72 to urge the foot into frictional engagement with the rail 54 locking the carriage 58 in the elected position. If desired, a leaf spring 7S may be disposed between foot 72 and the end of Wingbolt '74.

The shoes 60 are pivotally connected to the carriages 56 and 58 at arm portions 76 by means of screws 78, the screws 78 passing freely through bores in the arm portions 76 threadedly to engage the shoes 60. The shoes 60 are particularly adapted to couple the tensioning device 52 to the self-tapping screws 46 at the heads 50 thereof; and turning to FIG. 1l, a shoe 60 is seen to comprise a body 80 having a flat surface S2 which is adapted slidably to engage the top surface of a splint bar 20. Side flanges 84 depend from the body 80 in laterally opposed relationship for receiving a splint bar therebetween as is shown in FIG. 8.

Returning to FIG. l1, a toe 86 having a hook 88 is seen to depend from the body Sil in alignment with the longitudinal axis thereof. The hook 88 is adapted to engage the shank of a screw 46 immediately beneath the head 50 thereof; and the body 80 is fashioned with a longitudinal notch 90 for use in observing the head of the screw during engagement and disengagement by the shoe 60. Advantageously, the body S0 also includes a groove 92 aligned with the notch 90 and extending to a position over the hook 88 so as to pass the head Btl of screw 46 readily into engagement with the toe 86 and the hook 88.

After the splint bar 20 has been loosely connected to the fractured bone 40 and after the tensioning device 52 has been coupled to the heads of the screws 46, the bolt 66 is turned by appropriately manipulating the knurled knob 70 so as to converge the carriages 56 and 58. Upon continuing this action, the surfaces 44 of the fracture are eventually drawn tightly together as is shown in FIG. 4; and when a desired degree of compression is developed at the intimately contacted surfaces of the fracture, the tensioning device 52 is rotated to one side from the position shown in solid outline in FIG. 8 to that shown in broken outline. During such rotation, the carriages 56 and 58 and the rail 54 pivot about the shoes 60 at the screws 78.

After the tensioning device 52 has been turned to one side as is shown in FIGS. 5 and 6, self-tapping screws 94 are passed through the circular apertures 34 and 36 in the splint bar and radially into the bone 40. The screws 94 are selected to take a sufficient length so that they may penetrate deeply into the bony cortex of the bone 40 for securely fastening the splint bar 2t) thereto. Moreover, the upper margins of the Shanks of screws 94 abut the transverse walls 358 defined by the circular apertures 34 and 36 thereby acting to preserve the compression drawn axially into the bone by the tensioning device S2. After the screws 94 have been turned down tightly into contact with the splint bar 20, the tensioning device is loosened and removed, specifically by backing off the carriage S6 through appropriate manipulation of bolt 66 and by slipping one or both of the hooks 88 from beneath the heads of the corresponding screws 46. It is realized that the screws 46 may be tightened or removed after screws 94 have been secured in place.

As will be recognized, the present invention is arranged to position the fractured ends of a bone with a selected degree of axial compression preserved at the contacting surfaces of the fracture. This compression has been found to promote and accelerate healing of the fractured bone. Moreover, the splint appliance is attached directly to the bone in such a manner as to avoid y reliance on the contracting action of related muscles and to establish and preserve forcible engagement of the broken surfaces. Thus, the splint appliance of the invention enables an injured individual to become perambulatory at a much earlier stage in his convalescence. Cases involving serious leg fractures have been walking in less than ve weeks instead of as many as eighteen weeks after injury when the splint appliance of the invention has been employed. In addition, the splint arrangement of the invention does not require any parts thereof to extend through the flesh of the patient during the healing period. Hence, it allows the patient a rather substantial freedom of use of the injured body member even While the patient is still conned in bed.

While the splint bar 20 is an extremely useful appliance in the form and mode of usage described hereinabove, it is also advantageous to incorporate means with the splint bar 20 for resisting torsional forces which may be applied to the fractured bone after it has been set. ing to FIG. 4, a semi-circular slot 96 is seen cut radially into the cortex of bone 49 overlapping the surfaces 44 of the fracture. This cut is made with a conventional, circular bone saw, the blade of which is passed into contact with the bone through the slot 26 in the splint bar 2G. In order that the slot 96 will be of the desired shape, it is preferable to cut the slot after the bone frag-ments have been drawn into intimate contact by use of the tensioning device 52.

When the tensioning device 52 has been pivoted aside to expose the splint bar 20, as is shown in FIGS. 5 and 6, a key member 9S is passed into engagement with the slot 26 and into the slot 96 which has been cut in the bone. With reference for the moment to FIG. 9, the key member 96 is seen to comprise a semi-circular tongue or key element I0@ which depends from a body portion IGZ.

Return- The key element 100 is adapted ttingly to enter the keyway defined by the slot 96, and the body portion 102 is selected ttingly to enter the slot 26 which is formed in the splint bar 20. The key member 98 also includes an upper flange 104 which takes a width corresponding to the width of the channel 22 fashioned in the splint bar. Thus, the key -member 98 littingly engages the splint bar and the keyway fashioned in the bone as is shown in FIG. 10.

After the key member 98 has been fitted to the slot 96 and the slot 26, self-tapping screws 106 are passed through apertures 108 and into aggressive engagement with the bone 40 on opposite sides of the fracture 42. It will be noted with respect to FIGS. 6 and 7 that the fastenerepassing apertures 108 which are provided in the key member 98 are aligned with portions of the slot 26 in order that the screws 106 may readily enter the bone 4t). It is to be recognized that the splint bar 28 may be used either with or without the key member 98 as is desired.

While particular embodiments of the invention have been thus far shown and described, it should be understood, of course, that the invention is not limited thereto since many modifications may be made. Accordingly, modified embodiments of the invention are illustrated in FIGS. 12-17.

In FIG. 12, a rigid splint bar indicated generally by the numeral 110 is seen to include an elongated slot 112 which may be thought of as the result of merging the slots 24 and 28 of splint bar 20. The splint bar 110 is provided with a longitudinally extending groove 114 similar to the groove or channel 22 but differing therefrom by terminating short of the opposite ends of the splint bar. Circular apertures 116 and 118 perforate the opposite ends of the splint bar 118 longitudinally outwardly of the slot 112, the circular apertures 116 and 118 defining transverse walls 120 and 122 respectively for cooperation with fastener elements in preserving compression drawn into the 'fracture of a bone, the surfaces of which are spanned by the splint bar 110.

A further modified splint bar is indicated generally in FIG. 13 by the numeral 124, the splint bar 124 being distinguished by the fact that it is provided with laterally opening slots 126 and 128 at its opposite ends. The slots 126 and 128 define transverse Walls 130 and 132 respectively for the desired cooperation with fastener elements. Like the splint bar 110, the splint bar 124 is fashioned with a single, longitudinally elongated slot 134; however, the splint bar 124 eliminates the channel or groove in the upper surface thereof.

Another modified arrangement of the invention is illustrated in FIGS. 14-17. There, a tensioning device indicated generally by the numeral 136 is seen to include clamp rings 138 which are disposed releasably encircling the respective fragments of a fractured bone 140. Each of the clamp rings 138 includes a mounting formation 142 which is apertured slidably to pass portions of a compression rod 144. The opposite ends of rod 144 are threaded to receive nuts 146; and as will be recognized, axial compression can be drawn into the bone 141) by appropriately turning down the nuts 146, as for example by using an open end wrench of appropriate size. It is also recognized that a turnbuckle arrangement can be ernployed between the clamp rings 138 to achieve the desired force in the fractured bone. Advantageously, the clamp rings 138 comprise hinged C-shaped members which are connected at their unhinged ends by a screw-type catch or the like. Furthermore, the inner margins of the clamp rings 138 may be serrated or knurled to increase their ability to grip the bone 140.

The clamp rings 138 are situated on the opposite sides of a fracture 148 in the bone 140; and in order to tix the bone fragments in position after the surfaces of the fracture have been drawn into intimate contact, a slot 150 is cut or sawed int-o the broken ends of the bone fragments overlapping the fracture 148. The slot 150 desirably penetrates radially into the bone to enter the opposite walls of the cortex thereof. The slot 158 may be cut into the bone either before or after the ends of the fracture have been drawn into intimately abutting relationship.

The tensioning device 136 is employed in drawing axial compression into the bone 140 so as to pull the surfaces of the fracture 148 into intimate contact. Specifically, the nuts 146 are turned on the threaded ends of rod 144 converging the clamp rings 138 and thereby drawing the bone fragments together. After the bone fragments have been so drawn together with a selected degree of compression therebetween, a combined splint bar and key member 152 is assembled to the bone 149.

As will be seen in FlG. 17, the combined member 152 includes an elongated tongue or key element 154 which is assembled to a plate 156, plate 156 being perforated with circular apertures 158 adjacent its opposite ends. As is best shown in FIGS. l5 and 16, the key element 154 is adapted to be passed into the slot bridging the fracture and penetrating to the opposite walls of the cortical layer of the bone 140. When the combined member 152 is disposed in place, self-tapping screws 160 are passed through the apertures 158 and into aggressive engagement with the opposite Walls of the cortical layer. When the screws 160 have been turned down tightly, the tensioning device 136 is loosened by backing off the nuts 146 whereupon the clamp rings 138 are removed from the bone. The combined member 152 serves both to preserve the compression at the fracture in the bone and to resist torsional forces imposed upon the bone.

The specific examples herein shown and described are to be considered as being primarily illustrative. Various changes other than those described may, of course, occur to those skilled in the art; and such changes are to be understood as forming a part of this invention insofar as they fall within the spirit and scope of the appended claims.

The invention is claimed as follows:

1. A splint for extramedullary fixation of a fractured bone, comprising: a rigid bar adapted to be placed in contact with the surface of a bone, aligned parallel with the axis thereof, and disposed overlapping a fracture therein; means on said bar `defining opposed, transverse walls and a plurality of open regions individually disposed longitudinally inwardlyof said walls, said open regions being sized to pass fastener elements for engagement with said walls and said walls being spaced apart and being therebyadapted for situation respectively on the opposite sides of a fracture in said bone whereby to provide abutments which cooperate in preserving compressive forces drawn axially into said bone for the purpose of causing intimate contact between the surfaces of said fracturey in said bone; a fastener element passing through each of said open regions; formation means on a central portion of said bar dening an aperture adapted to be disposed spanning the fracture in said bone; a key member situated in said aperture and including a tongue extending laterally beyond said bar and being thereby adapted to enter a longitudinal keyway cut in said bone overlapping the fracture therein and extending from said bar on the same side as said fastener elements; and means for mounting said key member in said aperture.

2. A splint according to claim 1 wherein said key member includes individual fastener-passing apertures alignable with said fracture-spanning aperture.

3. A splint according to claim 1 wherein said open regions are separated by said formation means.

4. A splint according to claim 1 wherein said open regions and said aperture are merged to form an elongated slot.

5. A splint according to claim 1 wherein said bar includesa channel opening from the top surface thereof, said channel being arranged to be wider than said fracture-spanning aperture; and wherein said key member includes a top flange corresponding in Width with said channel whereby to be iittingly received therein for locking said key member to said bar.

6. Splint apparatus for use in the extramedullary fixation of a fractured bone, comprising: a rigid splint har adapted to be placed in contact with the surface of a bone, aligned parallel with the axis thereof, and disposed overlapping a fracture therein, said har including transverse, fastener-engaging edges and longitudinally extending open regions; first bone-engaging fastener' elements passed through selected ones of said open regions in slidable relationship with the walls thereof, said first fastener elements being adapted to be disposed on opposite sides of said fracture for loosely connecting said bar to said bone; a temporary tensioning splint device mounted on said first fastener elements overlying said bar, including opposed shoes slidably engaging said bar and having formations releasably coupled to said fastener elements, said device further including drive means for aggressively converging said shoes and thereby converging said first fastener elements for guidably compressing the surfaces of the fracture together; and second bone-engaging fastener elements passed through selected ones of said open regions in engagement With said edges whereby to permanently anchor said bar and preserve the compressive force urging the surfaces of said fracture into intimate Contact.

7. Splint apparatus for use in the extramedullary fixation of a bone, comprising: a rigid splint bar adapted to be placed in contact with the surface of -a bone, aligned parallel with the axis thereof, and disposed overlapping a fracture therein, said bar including transverse, fastenerengaging edges and longitudinally extending open regions; first bone-engaging fastener elements passed through selected ones of said open regions in slidable relationship with the walls thereof, said first fastener elements being adapted to be disposed on opposite sides of said fracture for loosely connecting said bar -to said bone, each of said first fastener elements having an exposed portion for use as a mounting situs for a tensioning splint device; a temporary tensioning splint device mounted on said first fastener elements overlying said bar, including opposed shoes slidably engaging said bar and having formations releasably coupled to said fastener elements at the exposed portions thereof, said device further including drive means for aggressively converging said shoes and thereby converging said first fastener elements for guidably compressing the surfaces of the fracture together; and second bone-engaging fastener elements passed through selected ones of said open regions in engagement with said edges whereby to permanently anchor said bar and preserve the compressive force urging the surfaces of said fracture into intimate contact.

8. Splint apparatus according to claim 7 wherein said exposed portions are enlarged.

9. Splint apparatus for use in extramedullary fixation of a fr-actured bone, comprising: a substantially fiat rigid splint bar adapted to be placed in contact with the surface -of a bone, aligned parallel with the axis thereof, and disposed overlapping a fracture therein, said bar including transverse edges and an open region longitudinally inwardly of each of said edges; tensioning means including first fastener elements slidably passed through said open regions spaced longitudinally inwardly from said edges, said first fastener elements being adapted to be disposed on opposite sides of said fracture for loosely connecting said bar to said bone, said tensioning means further including contractile means coupled to said elements and comprising forcibly convergable members acting to converge said elements and thereby urge the surfaces of the fracture intimately together, each of said fastener elements having shank portions whose length is greater than the thickness of said bar to facilitate entry into -an underlying bone; and second fastener elements passing through said open regions and adapted to pass into said bone in engagement with said edges whereby to preserve the compressive force urging the surfaces of said fracture into intimate Contact.

110. Splint apparatus according to claim 9 wherein said forcibly convergable members include progressively interengageable elements.

11. Splint apparatus for use in the extrarnedullary fixation of a fractured bone, comprising: a rigid splint bar adapted to be placed in contact with the surface of a bone, aligned parallel with the axis thereof, and disposed overlapping a fracture therein, said bar having a longitudinally extending guide channel in one surface and said bar including transverse, fastener-engaging edges and longitudinally extending open regions; first bone-engaging fastener elements passed through selected ones of said open region in slidable relationship with the walls thereof, said first fastener elements being adapted to be disposed on opposite sides of said fracture for loosely connecting said bar to said bone; a temporary tensioning splint device mounted on said first fastener elements overlying said bar, including opposed shoes slidably engaging said bar and fittedly engaging said channel, said shoes having formations releasably coupled -to said fastener elements and said tensioning splint device further including drive means for aggressively converging said shoes and thereby converging said first fastener elements for guidably compressing the surfaces of the fracture together; and second bone-engaging fastener elements passed through selected ones of open regions in engagement with said edges whereby permanently to anchor said bar and preserve the compressive force urging the surfaces of said fracture into intimate Contact.

12. For use in the extramedullary fixation of a bone, splint apparatus having a rigid splint bar adapted to be placed in contact with the surface of a bone, aligned parallel with the -axis of the bone and disposed overlying a fracture therein, the bar including transverse, fastenerengaging edges and longitudinally extending open regions, the apparatus further having first bone-engaging fastener elements passed through selected ones of the open regions of the bar in slidable relationship of the walls of the selected open regions', these first fastener elements being adapted to be disposed on opposite sides of the fracture of the bone for loosely connecting the bar to both fragments of the bone, the apparatus additionally having second bone-engaging fastener elements passed through selected ones of the open regions in engagement of the transverse edges of the bar, bone-setting apparatus comprising: opposed shoes superposed on th-e bar in slidable engagement therewith, said shoes having formations releasably coupable with the first bone-engaging fastener elements; and drive means for aggressively converging said shoes and thereby the first fastener elements for use in guidably compressing the fractured surfaces of the bone together.

References Cited by the Examiner FOREIGN PATENTS 867,422 2/ 1953 Germany. 118,577 2/1958 Russia. 115,095 1/1943 Sweden.

OTHER REFERENCES Bickhams Operative Surgery, vol. 2, 1924, pages 362, fig. 1396 relied upon.

Depuy Fracture Appliance Catalog, copyright 1954 (advertisement of ToWnsend-Gilfillian bone plate on page 119 relied upon).

RliCHARD A. GAUDET, Primary Examiner. ROBERT E. MORGAN, Examiner.

Claims (1)

  1. 9. SPLINT APPARATUS FOR USE IN EXTRAMEDULLARY FIXATION OF A FRACTURED BONE, COMPRISING: A SUBSTANTIALLY FLAT RIGID SPLINT BAR ADAPTED TO BE PLACED IN CONTACT WITH THE SURFACE OF A BONE, ALIGNED PARALLEL WITH THE AXIS THEREOF, AND DISPOSED OVERLAPPING A FRACTURE THEREIN, SAID BAR INCLUDING TRANSVERSE EDGES AND AN OPEN REGION LONGITUDINALLY INWARDLY OF EACH OF SAID EDGES; TENSIONING MEANS INCLUDING FIRST FASTENER ELEMENTS SLIDABLY PASSED THROUGH SAID OPEN REGIONS SPACED LONGITUDINALLY INWARDLY FROM SAID EDGES, SAID FIRST FASTENER ELEMENTS BEING ADAPTED TO BE DISPOSED ON OPPOSITE SIDES OF SAID FRACTURE FOR LOOSELY CONNECTING SAID BAR TO SAID BONE, SAID TENSIONING MEANS FURTHER IN-
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Cited By (76)

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US20040210232A1 (en) * 2003-04-09 2004-10-21 Tushar Patel Guide device and plate inserter
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US3400711A (en) * 1965-01-16 1968-09-10 Fur Feinmechanik Vormals Jette Surgical bone plating appliance
US3486500A (en) * 1965-09-17 1969-12-30 Nat Res Dev Osteotomy plate
US3386437A (en) * 1966-01-14 1968-06-04 Richard Mfg Company Compression device for use with a bone fracture plate
US3604414A (en) * 1968-08-29 1971-09-14 Nicomedes Borges Bone setting device
US3866607A (en) * 1973-08-09 1975-02-18 Environmental Sciences Corp Bone fracture compression device and method of usage
FR2289153A1 (en) * 1974-10-31 1976-05-28 Tornier Rene Appts. for osteosynthesis tensioning - has compression unit engaging splint and bone portion to force bone portions together
US4187841A (en) * 1978-07-07 1980-02-12 Knutson Richard A Bone compression or distraction device
WO1981000048A1 (en) * 1979-07-09 1981-01-22 R Knutson Bone compression or distraction device
US4289123A (en) * 1980-03-31 1981-09-15 Dunn Harold K Orthopedic appliance
US4548199A (en) * 1981-11-13 1985-10-22 Agee John M Fracture splint
US4696290A (en) * 1983-12-16 1987-09-29 Acromed Corporation Apparatus for straightening spinal columns
US4611581A (en) * 1983-12-16 1986-09-16 Acromed Corporation Apparatus for straightening spinal columns
US4794918A (en) * 1985-05-06 1989-01-03 Dietmar Wolter Bone plate arrangement
US4929247A (en) * 1988-10-06 1990-05-29 Rayhack John M Bone compression and distraction device
US5486176A (en) * 1991-03-27 1996-01-23 Smith & Nephew Richards, Inc. Angled bone fixation apparatus
US5549612A (en) * 1992-11-25 1996-08-27 Codman & Shurtleff, Inc. Osteosynthesis plate system
US5352227A (en) * 1993-02-03 1994-10-04 Howmedica Inc. Intercalary device
WO1996009012A1 (en) * 1994-09-19 1996-03-28 Handelman, Joseph, H. Fixation plate for long bone fractures and method of use
US5545162A (en) * 1995-02-15 1996-08-13 Huebner; Randall J. External fixator for repairing fractures of distal radius and wrist
US6171309B1 (en) 1995-02-15 2001-01-09 Acumed, Inc. External fixator for repairing fractures of distal radius and wrist
US5658283A (en) * 1995-02-15 1997-08-19 Huebner; Randall J. External fixator for repairing fractures
US5662649A (en) * 1995-02-15 1997-09-02 Huebner; Randall J. External fixator for repairing fractures of distal radius and wrist
US6162224A (en) * 1995-02-15 2000-12-19 Acumed, Inc. External fixator for repairing fractures of distal radius and wrist
US5976134A (en) * 1995-06-01 1999-11-02 Huebner; Randall J. External fixator for repairing fractures
US5624440A (en) * 1996-01-11 1997-04-29 Huebner; Randall J. Compact small bone fixator
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