Guide plate system for ulna osteotomy surgery

Abstract

The utility model provides a guide plate system for ulna osteotomy, which relates to the field of medical instruments and comprises an ulna steel plate and an osteotomy guide plate, first fixing holes are arranged at two ends of the ulna steel plate, a second fixing hole is arranged at one end of the ulna steel plate, and a first inclined hole is arranged on the inner side of the second fixing hole. The other end of the ulna steel plate is provided with a first strip-shaped hole and a second strip-shaped hole, and the first fixing hole and the second strip-shaped hole are both provided with steel nails used for fixing the ulna steel plate to the ulna. The osteotomy guide plate comprises a guide plate body and a connecting plate which can slide relatively, the guide plate body and the connecting plate are connected through a bolt, and the connecting plate is provided with a bolt piece used for fixing the connecting plate and the ulna steel plate. The surface of the connecting plate is provided with scale marks, the surface of the guide plate body is provided with a scale observation window for showing the scale marks and marked lines, and the side face of the guide plate body is provided with a beveling channel. The second fixing hole and the third fixing hole are provided with first fixing needles matched with the second fixing hole and the third fixing hole, the first strip-shaped hole and the fourth fixing hole are provided with second fixing needles matched with the first strip-shaped hole and the fourth fixing hole, the second fixing needles can slide in the first strip-shaped hole, the required osteotomy length can be adjusted according to the actual situation, and the application range is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an ulna osteotomy surgical guide plate system for orthopedic surgery. Background Art

[0002] The ulna lesions, deformities, and excessive length seriously affect the normal limb function, and require ulna shortening or lengthening surgery. The usual surgery is for experienced doctors to manually saw off the ulna, which is not only difficult to control the osteotomy length, but also has poor operation stability and takes a long time. It is also easy to cause the saw surface to be uneven, resulting in poor surgical results. Ulna shortening or lengthening surgery requires the use of different surgical tools, which is cumbersome to operate, and the osteotomy angle is difficult to grasp, affecting the surgical effect. To solve this problem, the utility model patent with announcement number CN114176711A discloses a distal ulna osteotomy orthopedic surgical guide system. Through the coordinated use of ulnar steel plates, osteotomy guides, fixing screws, and reduction clamps, the surgical operation is further guaranteed to be carried out reliably and stably. The surgical operation is simple and reliable, more practical, the osteotomy size is accurate, and the surgical time is saved.

[0003] However, the length of the osteotomy in the above-mentioned prior art structure is limited by the size of the short osteotomy groove and the long osteotomy groove when in use, that is, only a fixed length of the ulna can be cut through the short osteotomy groove and the long osteotomy groove, and its applicability is limited. Utility Model Content

[0004] The utility model aims at the above problems existing in the prior art and provides an ulna osteotomy surgical guide plate system with a wider application range.

[0005] The utility model solves the above technical problems with the following technical solutions: an ulnar osteotomy surgical guide plate system, comprising an ulnar steel plate and an osteotomy guide plate, characterized in that:

[0006] The ulnar steel plate has first fixing holes at both ends, a second fixing hole at one end, a first oblique hole at the inner side of the second fixing hole, and a first strip hole and a second strip hole at the other end of the ulnar steel plate. The first fixing hole and the second strip hole are both provided with steel nails for fixing the ulnar steel plate to the ulna, and the steel nails in the second strip hole can slide in the second strip hole;

[0007] The osteotomy guide plate comprises a guide plate body and a connecting plate that can slide relative to each other, the two being connected by bolts, windows being provided on the surfaces of the guide plate body and the connecting plate, and bolts for fixing the guide plate to the ulna steel plate are provided on the connecting plate;

[0008] The surface of the connecting plate has scale lines, a third fixing hole is provided on the connecting plate corresponding to the second fixing hole, a fourth fixing hole is provided on the connecting plate corresponding to the first strip-shaped hole, and a third strip-shaped hole for the bolt to slide is also provided on the connecting plate between the third fixing hole and the fourth fixing hole;

[0009] The surface of the guide plate body is provided with a scale observation window and a marking line for showing the scale line, the marking line is arranged adjacent to the scale observation window and corresponds to the scale line, and a chamfer is provided on the side of the guide plate body;

[0010] The second fixing hole and the third fixing hole are configured with first fixing pins adapted thereto, and the first strip-shaped hole and the fourth fixing hole are configured with second fixing pins adapted thereto, and the second fixing pins can slide in the first strip-shaped hole.

[0011] Furthermore, after osteotomy, it is usually necessary to use reduction forceps to clamp the fixing screws and slide them in the corresponding nail holes to slide the distal end of the ulna toward the proximal end, complete the osteotomy reduction, remove the osteotomy guide, and then fix it with oblique nails. However, in the process of using reduction forceps to clamp the fixing screws on both sides to close the osteotomy, since the reduction forceps are mostly composed of two mutually hinged forceps, the movement trajectory of the ends of the forceps arms is an arc rather than a straight line during the process of the two forceps arms rotating around their hinge axes to bring the two ends closer together, which easily leads to a certain degree of staggering after the osteotomy is closed, affecting the accuracy of the operation.

[0012] To solve this problem, the ulna osteotomy surgical guide system also includes a reduction clamp, which includes a first clamp body and a second clamp body hingedly connected to each other through a hinge axis at the middle and front parts. The front end of the first clamp body is provided with a first clamp hole corresponding to the first fixing pin and a second oblique hole corresponding to the first oblique hole, and the front end of the second clamp body is provided with a second clamp hole corresponding to the second fixing pin.

[0013] Furthermore, the two holes of the pliers are configured as kidney-shaped holes.

[0014] Furthermore, an operating port communicating with the bevel cutting path is provided on the guide plate body at the upper side of the bevel cutting path.

[0015] Furthermore, the first fixing needles are arranged in pairs along a direction perpendicular to the connecting plate.

[0016] Furthermore, the second fixing needles are arranged in pairs along a direction perpendicular to the connecting plate.

[0017] Furthermore, the first strip-shaped holes and the second strip-shaped holes are both in the same length direction of the ulna steel plate.

[0018] The beneficial effects of the utility model are:

[0019] 1. The utility model can adjust the required osteotomy length according to actual conditions through the cooperation of the osteotomy guide plate including the guide plate body and the connecting plate with the ulna steel plate, and has a wider application range.

[0020] 2. The utility model further provides a reduction forceps with a kidney-shaped hole structure, which can provide a clearance space for the linear motion trajectory of the osteotomy during use, thereby preventing the problem of poor accuracy of the osteotomy and surface connection caused by arc motion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0022] Figure 2 It is a schematic structural diagram of the ulna steel plate of Example 1 of the utility model;

[0023] Figure 3 It is a schematic structural diagram of the ulna steel plate and the connecting plate of Example 1 of the utility model;

[0024] Figure 4 and Figure 5 It is a structural schematic diagram of the osteotomy guide plate of Example 1 of the utility model;

[0025] Figure 6 and Figure 7 It is a three-dimensional and front view structural schematic diagram of the reduction clamp of Example 2 of the utility model;

[0026] In the figure: 1. ulna steel plate, 11. first fixing hole, 12. second fixing hole, 13. first oblique hole, 14 first strip hole, 15. second strip hole, 16. steel nail, 2. guide plate body, 21. bevel cut, 22. scale observation window, 23. marking line, 3. connecting plate, 31. scale line, 32. third fixing hole, 33. fourth fixing hole, 34. third strip hole, 4. bolt, 5. window, 61. first fixing pin, 62. second fixing pin, 7. reduction clamp, 71. first clamp body, 711. second oblique hole, 712. clamp first hole, 713. through hole, 72. second clamp body, 721. clamp second hole, 81. fastening screw, 82. fastening nut, 9. high cap bolt. DETAILED DESCRIPTION

[0027] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0028] Example 1

[0029] The ulna osteotomy surgical guide plate system of this embodiment includes an ulna steel plate 1 and an osteotomy guide plate, wherein:

[0030] The two ends of the ulna steel plate 1 are provided with first fixing holes 11. Figure 2 As shown, a second fixing hole 12 is provided at one end of the ulnar steel plate 1, a first oblique hole 13 is provided inside the second fixing hole 12, a first strip hole 14 and a second strip hole 15 are provided at the other end of the ulnar steel plate 1, both of which are in the same direction as the length direction of the ulnar steel plate 1, the first fixing hole 11 and the second strip hole 15 are both provided with a steel nail 16 for fixing the ulnar steel plate 1 on the ulna, and the steel nail 16 in the second strip hole 15 can slide in the second strip hole 15;

[0031] The osteotomy guide plate comprises a guide plate body 2 and a connecting plate 3 which can slide relative to each other. Figure 4 , Figure 5 As shown, the two are connected by bolts 4, and windows 5 are provided on the surfaces of the guide plate body 2 and the connecting plate 3, and the connecting plate 3 is provided with bolts for fixing it to the ulna steel plate 1. In this embodiment, high-cap bolts 9 (bolts with nuts having a certain height are convenient for hand-holding operation) are specifically used;

[0032] The surface of the connecting plate 3 has scale lines 31, a third fixing hole 32 is provided on the connecting plate 3 corresponding to the second fixing hole 12, a fourth fixing hole 33 is provided on the connecting plate 3 corresponding to the first strip-shaped hole 14, and a third strip-shaped hole 34 for the bolt 4 to slide is provided between the third fixing hole 32 and the fourth fixing hole 33 on the connecting plate 3;

[0033] The surface of the guide plate body 2 is provided with a scale observation window 22 and a marking line 23 for showing the scale line 31, the marking line 23 is arranged adjacent to the scale observation window 22 and corresponds to the scale line 31, a bevel cutting path 21 is opened on the side of the guide plate body 2, and an electric saw is inserted to perform osteotomy; an operation port 8 connected to the bevel cutting path 21 is opened on the upper side of the bevel cutting path 21 and on the guide plate body 2;

[0034] The second fixing hole 12 and the third fixing hole 32 are equipped with a first fixing pin 61 adapted thereto, and the first strip hole 14 and the fourth fixing hole 33 are equipped with a second fixing pin 62 adapted thereto, and the second fixing pin 62 can slide in the first strip hole 14. There are two first fixing pins 61 and two second fixing pins 62, respectively, and the two first fixing pins 61 are arranged in a direction perpendicular to the connecting plate 3, and the two second fixing pins 62 are arranged in a direction perpendicular to the connecting plate 3.

[0035] When in use, the operation process of this embodiment is as follows: adjust the relative position of the guide body 2 and the connecting plate 3 so that the marking line 23 of the guide body 2 corresponds to the 0 scale on the indicator scale line 31, tighten the bolt 4 to fix the guide body 2 and the connecting plate 3; use the high-hat bolt 9 to fix the ulnar steel plate 1 and the connecting plate 3. Place the assembled osteotomy guide system at the position where the ulnar osteotomy is required, and use two 1.5 mm fixing pins 61 as shown in FIG. Figure 1 As shown, the third fixing hole 32 and the second fixing hole 12 are vertically penetrated until the ulna below is penetrated; then two 1.5 mm fixing needles 62 are used as Figure 1 The fourth fixing hole 33 and the first strip hole 14 are vertically penetrated until the ulna below is penetrated; four fixing pins temporarily fix the osteotomy system and the ulna; the ulna steel plate 1 is firmly fixed to the ulna through the second strip hole 15 using the steel nail 16; the ulna steel plate 1 is firmly fixed to the ulna through the first fixing hole 11 using the steel nail 16. Through the bevel cutting channel 21, an electric saw is inserted to perform ulna osteotomy, and the osteotomy condition can be observed and the broken bone residue can be cleaned and flushed through the operation port 8. Then loosen the bolt 4, adjust the osteotomy length according to the preoperative plan, push the guide body 2 to make it slide relative to the connecting plate 3, so that the marking line 23 of the guide body 2 corresponds to the osteotomy scale on the indicator scale line 31 (corresponding to the planned osteotomy length), and the scale can be observed through the scale observation window 22 on the guide body 2; then tighten the bolt 4, re-fix the guide body 2 and the connecting plate 3; through the bevel cut 21, use an electric saw to reach in for the second ulnar osteotomy, and the osteotomy situation can be observed and the broken bone residue can be cleaned and flushed through the operating port 8. After the osteotomy is completed, unscrew the top cap bolt 9, remove the guide body 2 and the connecting plate 3, and then use the reduction forceps to close the osteotomy surface and fix it (refer to the steps of Example 2).

[0036] Example 2

[0037] On the basis of Example 1, the ulna osteotomy surgical guide plate system of this embodiment further includes a matching reduction forceps 7. Figure 6 and Figure 7 As shown, the reduction forceps 7 include a first forceps body 71 and a second forceps body 72 which are hingedly connected to each other through a hinge axis in the middle front portion. The front end of the first forceps body 71 is provided with a first forceps hole 712 corresponding to the first fixing pin 61 and a second inclined hole 711 corresponding to the first inclined hole 13. The front end of the second forceps body 72 is provided with a second forceps hole 721 corresponding to the second fixing pin 62. The second forceps hole 721 is specifically a kidney-shaped hole.

[0038] When in use, the operation process of the reduction clamp 7 of this embodiment is as follows: after the osteotomy is completed, unscrew the top cap bolt 9, remove the guide plate body 2 and the connecting plate 3; loosen the steel nail 16 in the second strip hole 15, insert the corresponding two fixing pins 61 into the first clamp hole 712 of the reduction clamp 7, insert the corresponding two fixing pins 62 into the second clamp hole 721, insert the reduction clamp 7 and clamp the reduction clamp to pressurize the osteotomy ends to fit closely, and then tighten the nut 82 to fix the position of the reduction clamp; tighten and fix the steel nail 16 in the second strip hole 15. Insert the steel nail 16 in the first oblique hole 13 of the steel plate through the second oblique hole 711 in the reduction clamp 7, fix the osteotomy ends in a perpendicular state to the osteotomy surface and pressurize them. Pull out the reduction clamp 7, and insert the remaining steel plate screws to tighten and fix them.

Claims

1. An ulnar osteotomy surgical guide system, comprising an ulnar steel plate (1) and an osteotomy guide, characterized in that: The ulnar steel plate (1) has first fixing holes (11) at both ends, a second fixing hole (12) at one end, a first oblique hole (13) at the inner side of the second fixing hole (12), and a first strip hole (14) and a second strip hole (15) at the other end of the ulnar steel plate (1). The first fixing hole (11) and the second strip hole (15) are both provided with steel nails (16) for fixing the ulnar steel plate (1) on the ulna, and the steel nails (16) in the second strip hole (15) are able to slide in the second strip hole (15); The osteotomy guide plate comprises a guide plate body (2) and a connecting plate (3) which are capable of sliding relative to each other, the two being connected via a bolt (4), windows (5) being provided on the surfaces of the guide plate body (2) and the connecting plate (3) respectively, and the connecting plate (3) being provided with a bolt member for fixing the guide plate body (2) to the ulna steel plate (1); The surface of the connecting plate (3) has scale lines (31), a third fixing hole (32) is provided on the connecting plate (3) corresponding to the second fixing hole (12), a fourth fixing hole (33) is provided on the connecting plate (3) corresponding to the first strip-shaped hole (14), and a third strip-shaped hole (34) for the bolt (4) to slide is also provided on the connecting plate (3) between the third fixing hole (32) and the fourth fixing hole (33); The surface of the guide plate body (2) is provided with a scale observation window (22) for displaying the scale line (31) and a marking line (23), the marking line (23) is arranged adjacent to the scale observation window (22) and corresponds to the scale line (31), and a chamfered channel (21) is opened on the side of the guide plate body (2); The second fixing hole (12) and the third fixing hole (32) are provided with a first fixing needle (61) adapted thereto, and the first strip-shaped hole (14) and the fourth fixing hole (33) are provided with a second fixing needle (62) adapted thereto, and the second fixing needle (62) is capable of sliding in the first strip-shaped hole (14).

2. The ulna osteotomy surgical guide system according to claim 1, characterized in that: The invention also comprises a reduction clamp (7), wherein the reduction clamp (7) comprises a first clamp body (71) and a second clamp body (72) which are hingedly connected to each other via a hinge shaft at the front and middle parts thereof, wherein the front end of the first clamp body (71) is provided with a first clamp hole (712) corresponding to the first fixing needle (61) and a second inclined hole (711) corresponding to the first inclined hole (13), and the front end of the second clamp body (72) is provided with a second clamp hole (721) corresponding to the second fixing needle (62).

3. The ulna osteotomy surgical guide system according to claim 2, characterized in that: The second holes (721) of the clamp are configured as kidney-shaped holes.

4. The ulna osteotomy surgical guide system according to claim 1, characterized in that: An operating port (8) communicating with the beveled path (21) is provided on the guide plate body (2) on the upper side of the beveled path (21).

5. The ulna osteotomy surgical guide system according to claim 1, characterized in that: The first fixing needles (61) are arranged in pairs along a direction perpendicular to the connecting plate (3).

6. The ulna osteotomy surgical guide system according to claim 1, characterized in that: The second fixing needles (62) are arranged in pairs along a direction perpendicular to the connecting plate (3).

7. The ulna osteotomy surgical guide system according to claim 1, characterized in that: The first strip-shaped holes (14) and the second strip-shaped holes (15) are both in the same length direction as the ulna steel plate (1).

Images