US3094120A - Pin guide and stabilization bar - Google Patents

Description

June 18, 1963 H. W. BL-OSSER PIN GUIDE AND VSTABILIZATION BAR Filed April 17, 1961 "j 'i 25 v oINVENFOR. ze f7 20 f4' Hon/fd I//w/ 67mg/ am Q5/1m' 52 Av-rbzwsrs.

United States Patent 3 094,120 PIN GUIDE AND, STABILIZATION BAR Howard William Blosser, 2418 Wall St., Joplin, M0. Filed Apr. 17, 1961, Ser. No. 103,573 1 Claim. (ci. 12s-92) The present invention relates to a surgical device for use in bone surgery and more particularly to fracture surgery.

An object of the present invention is to provide a pin guide and stabilization bar which is adapted to be used for facilitating the repair of breaks or fractures, and wherein the pin guide and stabilization bar of the present invention is especially intended for femoral neck, intertrochanteric and sub-trochanteric fractures.

Another object is to provide a means whereby union of the fractured parts can be more readily effected so that improved results can be obtained 4in the treatment of hip fractures such as neck 'fractures or trochanter fractures.

Another object of the invention is to provide an apparatus of the character described that may be used conveniently and with precision, and further objects and advantages are to provide improved elements and arrangements thereof in a device of th-e character described that is economical to produce, durable in for-m, and conducive to the most economical use of materials and uniformity of members formed therefrom.

Still further objects Iand advantages will become apparent in the subsequent description in the specification.

In the drawings:

FIGURE 1 is an elevational View illustrating the use of the present invention, and with parts broken away and in section.

FIGURE 2 is a sectional View taken on the line 2 2 of FIGURE 1.

FIGURE 3 is a fragmentary perspective View showing a portion of one of the pins.

FIGURE 4 is an elevational view showing the pin guide and stabilization bar with the pins removed therefrom.

FIGURE 5 is an elevational view of .the wrench for use in adjusting the device.

FIGURE 6 is a sectional View taken on the line 6-6 of FIGURE 5.

FIGURE 7 is a fragmentary sectional view generally similar to FIGURE 2 but illustrating a modification.

Referring in detail to the drawings, and more particularly 4to FIGURES l thro-ugh 6 of the drawings, the numeral 10 indicates the pin guide and stabilization bar of the present invention for use with surgery or repair of a bone such as the bone 11, FIGURE l, and the bone 11 is of the type that includes a rounded head 12 adapted to articulate with a cavity in a hip bone, and the bone 11 further includes a shaft 13 that is joined to the head 12 by a constricted neck 14. The numeral 15 indicates a trochanter that surmounts the shaft and jutts outwardly therefrom, and the numeral 16 indicates the fracture or break that lies lbetween the head and shaft of the bone such as the thigh bone or upper extremity of the femur.

As shown in the drawings the pin guide stabilization bar 10 embodies a plate 17 that is provided with a plurality of spaced apart countersunk openings or apertures 18 therein, Iand screws or securing elements 19 extend through these openings 18 and engage the shaft 13 of the bone 11.

The pin guide and stabilization bar 10 further includes a barrel 20 that is arranged in a cavity or opening 27 in the bone, and the barrel 20 is arranged angularly with respect to the plate 17 and it is formed integral therewith or secured theerto, and the barrel 20 is provided with a plurality of spaced parallel longitudinally extend- "ice ing bores or openings 21 for a purpose to be later described. The openings 21 are arranged in a plane transversely of the longitudinal yaxis of said plate 17. As shown in the drawings, Ipins 22 extend through the openings 21, and each of the pins 22 has the same construction and each pin 22 includes an end portion 23 that has deep cut threads thereon, and the threads in the portion 23 may be wood screw ty-pe threads, and the end portions 23 taper to a point. Each pin 22 further includes a smooth portion 24 which is adjacent the threaded end 23, and each pin 22 also includes a threaded section 25, and an outer rectangular shank portion 26. The numeral 28 indicates a fastener or nut that is arranged in threaded engagement with the threaded section 25 of the pin, and the fastener 28 is provided with diametrically opposed kerfs 4or slots 29 therein, and the fastener 2S is adapted to abut the outer end portion of the barrel 20.

Attention is now directed to FIGURE 5 of the drawings wherein there is illustrated a tool or wrench which is indicated generally by the numeral 30, and the wrench 30 embodies a hollow body member 31 that has spaced 4apart lugs 32 on an end thereof for engaging rthe slots 29 on the fastener 28, and the body member 31 is further provided with opposed hand gripping elements 33 for facilitating the manual turning of the wrench 30.

The numeral 34 indicates a longitudinally extending bore or passageway inthe body member 3'1 for providing clearance for the pin 22 to extend therethrough.

Attention is now directed to FIGURE 7 of the drawings wherein there is illustrated a modification, and FIG- URE 7 of the pin guide and stabilization bar 10 has generally the same construction and use as the previously described member of FIGURE l through FIGURE 6. However, in FIGURE 7 a different type of pin 35 is used and the pins 35 are adapted to be used instead of the pins 22. It will be -seen that each of the p-ins 35 includes a pointed threaded end portion 36 as well as a nonthreaded or smooth portion 37, and there is provided on the outer end of each pin 35 an enlargement 38 that provides a shoulder,.and there is provided in the shoulder 38 a slot or kerf 39 which is adapted to be engaged by a tool such as a screw driver.

It will therefore be seen that according to the present invention there has been provided a pin guide and stabilization bar for femoral neck, intertrochanteric and subtrochanteric fractures, and in use with the parts arranged as shown in FIGURES 1 through 6 for example, .the plate 17 is adapted to be attached to the shaft 13 of the bone 11 as for example by means of screws 19 which extend through the openings 18 in the plate 17. The barrel 20 is adapted to be positioned in the cavity 27, and with the numeral 16 representing the break or fracture that is to be repaired, it will be seen that due to the provision of the openings 21 in the barrel 20, the pins 22 can be extended through these openings 21 and the pointed threaded ends 23 will threadedly engage the head 12 of the bone. The `square shank 26 can be conveniently engaged by a suitable wrench or tool so as to rotate or turn the pin 22 in order to cause the threaded portion 23 to properly thread into the head portion 12, and after the pins 22 have been adjusted to the desired position by engaging a wrench with the shank portion 26 of the pin, the wrench 30 can be arranged on the pin 22 as for example as shown in dotted lines in FIGURE l and then by manually gripping the elements 33 the wrench 30 can be rotated. With the lugs 32 of the wrench 30 arranged in engagement with the slots 29' of the nut or fastener 28, it will be seen that this manual rotation of the wrench 30 will cause the `fastener 28 to have a tendency to retract the pin 22 from the barrel 20 since the fastener 28 is arranged in threaded engagement with the threaded section 25 of the pin. As the fastener 28 is continued to be rotated by the wrench 30, the parts of the bone on opposite sides of the break 16 will be brought together in their proper place, and with the fastener 28 abutting the outer end portion of the barrel 20, the fastener will function as a lock nut to maintain the parts of the bone on opposite sides of the fracture 16 together `in their proper location. After the pin has been thus adjusted, the wrench 30 can be removed so that the wrench can be used over and over again as desired or required.

Instead of using the pins 22, the pins 35 of FIGURE 7 can be used, and when using the pins 35, it will be seen that with the parts arranged yas shown in FIGURE 7, the pins 35 are adapted to be extended through the openings 21 in the barrel 20 so that the threaded end portions 36 of the pins will engage the head portion 12 of the bone being repaired, and in order to eifect or cause the desired rotation of the pins 35, a blade of a screw driver or the like can be arranged in engagement with the kerf 39 of the enlargement 38 in order to rotate the pin 35, sand the enlargement or shoulder 38 is adapted to abut the outer end portion of the lbarrel so that the necessary pressure will be exerted on the parts of the bone on opposite sides of the fracture to maintain these parts of the bone clamped together so that the healing process can properly take place.

The pins each have the outer shank portion 26 of a generally rectangular formation so `as to `facilitate engagement -by the shank portion with a suitable wrench or other tool whereby the pin can be initially rotated so that its threaded pointed end portion 23 will engage the head 12 to the proper depth. Then, the wrench 30 can be temporarily positioned on the outer portion Aof 4the pin in order to rotate the fastener 28, and the lugs 32 of the wrench 30 are adapted to engage the slots 29 of the fastener so that the desired rotation of the fastener can take place. In view ofthe fact that the fastener threadedly engages the threaded section 25 of the pin, it wil-l be seen that this rotation of the fastener by the Wrench 30 will cause the pin to be given an outwardly directed force or pull whereby with the threaded end portion 23 engaging the head 12, it will be seen that this will cause the clamping action to take place between teh separated parts of the 4bone on `opposite sides of the fracture 16.

Suitable materials can be used in making the various parts, `and these parts may be made in a size and shape to fit the particular needs or requirements.

It will therefore be seen that according to the present invention there has been provided a pin guide and stabilization bar for femoral neck, intertrochanteric yand :sub-trochanteric fractures. The guide 20 and stabilization bar plate 17 are of one piece formation or construction `and are adapted to be made `of stainless steel. The barrel 20 is of cylindrical formation. The plate 17 h-as a generally at construction. The pins 22 are adapted to be made of stainless steel, and the end portions 23 may have deep cut wood screw type threads thereon, and lthe outer portions of the pins are squared as at 26. The section 25 may have machine threads thereon. As shown in FIGURE 7 xed length screws or pins 35 can be used instead of the pins 22.

It will now be clear that there is provided a device which accomplishes the objectives heretofore set forth. While the invention has been disclosed in its preferred form, it is to be understood that the specific embodiment thereof as described and illustrated herein its not to be considered in a limited sense as there may be other forms or modifications of the invention which should also `be construed to come within the scope of the appended claim.

What is claimed is:

A pin guide and stabilization bar for femoral neck, interftr-ochanteric and sub-trochanteric fractures comprising a plate having apertures therein, a barrel arranged angularly with respect to the upper portion of said plate and formed integral therewith, there being a pair of spaced parallel longitudinally extending openings in said barrel, said pair of opening-s being arranged in a plane transversely of the longitudinal axis of said plate, pins extending through the openings in said barrel, and each lof -said pins comprising and end portion having threads thereon, each pin further including a smooth portion, and an enlargement providing a shoulder on the outer end of said pin, there being a slot in said shoulder for engagement by a tool, said barrel projeoting outwardly from said plate yand being adapted to be inserted into a bore provided in a bone so as to reinforce said pins when [inserted through said openings in said barrel into said bone.

References Cited in the le of this patent UNITED STATES PATENTS OTHER REFERENCES De Puy Catalogue, page 32, July 1956. Broaching Hansen-Street Nail relied on.) Division 55.)

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