Minimally invasive system for fixing tubular bone inside and outside medullary cavity
By using a combination of fixation pins and connecting nails at the fracture site to form a self-adaptive stress system, the problem of uneven longitudinal stress in existing technologies is solved, achieving stability and rapid healing of the fracture site.
Patent Information
- Application Number
- CN202311840778.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2026-02-13
AI Technical Summary
Existing interlocking intramedullary nails and elastic intramedullary nails, when used for fixation within the medullary cavity, result in uneven longitudinal stress, rotation, and swaying, lacking a mechanically stable tubular bone fixation system.
A combination of a pair of fixation pins and connecting nails is used to fix the tubular bone from the side through the connecting nails. Combined with binding lines and end fixation nails, three longitudinal guide tracks are formed, creating a self-adaptive stress system that resists rotation and separation and shields lateral stress.
It achieves the formation of a relatively stable mechanical environment at the fracture site, promotes rapid healing, resists rotation and separation, evenly disperses stress, and improves fracture stability and healing effect.
Smart Images
Figure CN121512656A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of fracture surgery fixation, in particular to a tubular bone fixation minimally invasive system with internal and external fixation of medullary cavity. BACKGROUND
[0002] At present, the existing interlocking intramedullary nail and elastic intramedullary nail are fixed in the medullary cavity to fix the fracture. The single longitudinal axis fixation force line can rotate, produce left and right rotation, up and down swing (similar to a rotating seesaw), and produce longitudinal stress, which is uneven and unbalanced. Two axis fixation force lines can swing, produce up and down swing (similar to a seesaw), and longitudinal stress is uneven. There is a lack of a mechanically stable tubular bone fixation system. SUMMARY
[0003] The purpose of the present application is to overcome the above-mentioned deficiencies, and to provide a tubular bone fixation minimally invasive system with internal and external fixation of medullary cavity.
[0004] The present application comprises a pair of fixation needles inserted into a tubular bone, a connecting nail arranged between the pair of fixation needles for fixing the tubular bone from the side, and the connecting nail is inserted into the tubular bone on both sides of the transverse fracture line.
[0005] A guide needle is inserted into the end of the tubular bone, and an intramedullary nail guide is inserted along the guide needle, the intramedullary nail guide is provided with a pair of needle insertion holes, and the pair of fixation needles are inserted into the tubular bone along the needle insertion holes.
[0006] The intramedullary nail guide is pulled out, the tail of the pair of fixation needles is provided with a connecting plate, the connecting plate is provided with a pair of needle holes, the tail of the fixation needle is located in the needle hole, and the tail of the fixation needle is locked by a locking screw, and the tail of the pair of fixation needles is fixed by the connecting plate.
[0007] The guide needle is provided with a nail insertion avoidance groove, the end of the guide needle is provided with a wire pushing groove, the binding wire is sleeved on the wire pushing groove, and one end of the binding wire is pushed into the tubular bone through the guide needle.
[0008] The connecting nail is a U-shaped nail, the connecting nail is inserted into the tubular bone along the nail insertion avoidance groove, the guide needle is pulled out, the other end of the binding wire is pulled backward, one end of the binding wire is wound on the connecting nail, and the other end of the binding wire is bound on the connecting plate.
[0009] A terminal fixation nail is inserted into the tubular bone close to the tail of the fixation needle, and the terminal fixation nail is located between the pair of fixation needles.
[0010] The connecting nail is a U-shaped nail, the connecting nail is inserted into the tubular bone along the nail insertion avoidance groove, the blocking nail is inserted along the nail insertion avoidance groove, the guide needle is pulled out, the other end of the binding wire is pulled backward, one end of the binding wire is wound on the blocking nail, and the other end of the binding wire is bound on the connecting plate, the terminal fixation nail is inserted into the tubular bone close to the tail of the fixation needle, and located between the pair of fixation needles.
[0011] The pull wire shuttle is inserted along the intramedullary needle guide, the head of the pull wire shuttle is provided with a shuttle hole, the tubular bone is provided with a through hole in communication with the shuttle hole, the binding wire is inserted into the through hole and the shuttle hole, the ends of the binding wire are knotted to prevent the ends of the binding wire from entering the through hole, the pull wire shuttle and the intramedullary needle guide are pulled out, the pull wire shuttle drives the binding wire to be pulled out to the outside of the tubular bone, and the connecting plate is installed at the tail of the pull wire shuttle, and the binding wire is bound on the connecting plate.
[0012] The end fixing nail is inserted into the tubular bone close to the tail of the fixing needle, and the end fixing nail is located between the pair of fixing needles.
[0013] The connecting plate is a long circle, at least one threaded hole is formed in the top arc and the bottom arc of the connecting plate, respectively, a locking screw is screwed into the threaded hole to fix the tail of the fixing needle, and a pair of limiting grooves are symmetrically distributed in the middle part of the connecting plate, the binding wire is located in the limiting groove, and the binding wire is prevented from swinging.
[0014] The application has the advantages that a three-longitudinal-direction guide rail is formed by the pair of fixing needles and the connecting nail, a self-adapting stress system, anti-rotation, anti-separation, anti-different side stress, shielding of the side stress and the relative stable mechanical system of the rotating stress, so that the fracture is quickly healed in a good timely mechanical environment. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a structure schematic diagram of the application for fixing the tubular bone by using the fixing needle and the connecting nail.
[0016] Figure 2 It is a structure schematic diagram of the application for loading the guide needle and the intramedullary needle guide.
[0017] Figure 3 It is a structure schematic diagram of the application for loading the guide needle and the intramedullary needle guide.
[0018] Figure 4 It is a structure schematic diagram of the application for loading the guide needle and the intramedullary needle guide.
[0019] Figure 5 It is a structure schematic diagram of the application for loading the guide needle and the intramedullary needle guide.
[0020] Figure 6 It is a structure schematic diagram of the application for loading the guide needle and the intramedullary needle guide.
[0021] Figure 7 It is a structure schematic diagram of the application for loading the guide needle and the intramedullary needle guide.
[0022] Figure 8 It is a structure schematic diagram of the application for loading the guide needle and the intramedullary needle guide. EMBODIMENT
[0023] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.
[0024] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.
[0025] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0026] In the description of the embodiments of the present application, it should be noted that, if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second" and the like appear in the description of the present application, they are only used for distinction and cannot be understood as indicating or implying relative importance.
[0027] In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly specified and limited, if the terms "arranged", "connected" appear, they should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, or can be connected inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0028] As shown in the drawings, the present application comprises a pair of fixation needles 2 inserted into a tubular bone 1, a connecting nail 3 for fixing the tubular bone 1 from the side is arranged between the pair of fixation needles 2, and the connecting nail 3 is inserted into the tubular bone 1 on both sides of the transverse fracture line.
[0029] A guide needle 4 is inserted into the end of the tubular bone 1, an intramedullary needle guide 5 is inserted along the guide needle 4, a pair of needle insertion holes are formed on the intramedullary needle guide 5, and a pair of fixation needles 2 are inserted into the tubular bone 1 along the needle insertion holes.
[0030] Pull out the intramedullary needle guide 5, a pair of fixed needle 2 tail provided with a connecting plate 6, the connecting plate 6 is opened a pair of needle hole, the tail of fixed needle 2 is located in the needle hole, and is locked by locking screw, the tail of a pair of fixed needle 2 is fixed through the connecting plate 6.
[0031] The guide needle 4 is opened with a nail avoiding groove 7, and the end of the guide needle 4 is opened with a wire pushing groove 8, the binding wire 9 is sleeved on the wire pushing groove 8, and one end of the binding wire 9 is pushed into the tubular bone 1 through the guide needle 4.
[0032] The connecting nail 3 is a U-shaped nail, the connecting nail 3 is inserted into the tubular bone 1 along the nail avoiding groove 7, the guide needle 4 is pulled out, the other end of the binding wire 9 is pulled back, one end of the binding wire 9 is wound on the connecting nail 3, and the other end of the binding wire 9 is bound on the connecting plate 6.
[0033] The end fixed nail 10 is inserted into the tubular bone 1 close to the tail of the fixed needle 2, and the end fixed nail 10 is located between the pair of fixed needles 2.
[0034] The connecting nail 3 is a U-shaped nail, the connecting nail 3 is inserted into the tubular bone 1 along the nail avoiding groove 7, the blocking nail 11 is inserted along the nail avoiding groove 7, the guide needle 4 is pulled out, the other end of the binding wire 9 is pulled back, one end of the binding wire 9 is wound on the blocking nail 11, and the other end of the binding wire 9 is bound on the connecting plate 6, the end fixed nail 10 is inserted into the tubular bone 1 close to the tail of the fixed needle 2, and located between the pair of fixed needles 2.
[0035] The pull wire shuttle 13 is inserted along the intramedullary needle guide 5, the head of the pull wire shuttle 13 is opened with a shuttle hole 12, the tubular bone 1 is opened with a through hole communicated with the shuttle hole 12, the binding wire 9 is inserted into the through hole and the shuttle hole 12, the ends of the binding wire 9 are knotted to prevent the ends of the binding wire 9 from entering the through hole, the pull wire shuttle 13 and the intramedullary needle guide 5 are pulled out, the pull wire shuttle 13 drives the binding wire 9 to be pulled out to the outside of the tubular bone 1, the connecting plate 6 is installed at the tail of the pull wire shuttle 13, and the binding wire 9 is bound on the connecting plate 6.
[0036] The end fixed nail 10 is inserted into the tubular bone 1 close to the tail of the fixed needle 2, and the end fixed nail 10 is located between the pair of fixed needles 2.
[0037] The connecting plate 6 is long circular, at least one threaded hole is opened on the top arc and the bottom arc of the connecting plate 6 respectively, the tail of the fixed needle 2 is fixed by screwing the locking screw into the threaded hole, a pair of limiting grooves are symmetrically distributed in the middle of the connecting plate 6, the binding wire 9 is located in the limiting groove, and the binding wire 9 is prevented from swinging.
[0038] Example 1: as shown in the accompanying Figures 1-3 .
[0039] 1. The top end of the tubular bone 1 is opened by the intramedullary needle opening device.
[0040] 2. Insert the guide pin 4 through the top opening into the medullary cavity, through the transverse fracture line into the distal end of the tubular bone.
[0041] 3. Insert the intramedullary pin guide 5 through the guide pin 4, into the medullary cavity into the distal end of the tubular bone 1, reduce the fracture, align the fractured tubular bone 1.
[0042] 4. Insert a pair of fixation pins 2 through the pin holes of the intramedullary pin guide 5 into the tubular bone 1, the tip of the fixation pin 2 is in the distal epiphysis of the tubular bone 1.
[0043] 5. Remove the guide pin 4, insert the connecting nail 3 into the tubular bone 1 on both sides of the transverse fracture line, penetrate the cortical bone of the tubular bone 1 on both sides, complete the surgical fixation of the tubular bone 1.
[0044] A three longitudinal guide rail, self-adapting stress system, anti-rotation, anti-separation, anti-different lateral stress, shielding the relative stable mechanical system of lateral stress and rotational stress is generated by a pair of fixation pins and connecting nails, so that the fracture heals quickly in a good timely mechanical environment.
[0045] Example 2: as shown in the accompanying Figures 2-4 .
[0046] 1. Open the top of the tubular bone 1 by the intramedullary pin opening device.
[0047] 2. Insert the guide pin 4 through the top opening into the medullary cavity, through the transverse fracture line into the distal end of the tubular bone.
[0048] 3. Insert the intramedullary pin guide 5 through the guide pin 4, into the medullary cavity into the distal end of the tubular bone 1, reduce the fracture, align the fractured tubular bone 1.
[0049] 4. Insert a pair of fixation pins 2 through the pin holes of the intramedullary pin guide 5 into the tubular bone 1, the tip of the fixation pin 2 is in the distal epiphysis of the tubular bone 1.
[0050] 5. Remove the guide pin 4 for the first time.
[0051] 6. The binding wire 9 is sleeved on the head of the guide pin 4 and pushed into the wire groove 8, and the guide pin 4 is inserted into the tubular bone 1 again, and the binding wire 9 is driven by the guide pin 4 to enter the distal end of the tubular bone 1.
[0052] 7. Remove the intramedullary pin guide 5.
[0053] 8. Insert the connecting nail 3 into the tubular bone 1 on both sides of the transverse fracture line, through the pin-avoiding slot 7 on the guide pin 4, penetrate the cortical bone of the tubular bone 1 on both sides, guide the insertion position of the connecting nail 3 through the pin-avoiding slot 7, so that the connecting nail 3 is located in the binding wire 9, 9. Remove the guide pin for the second time.
[0054] 10、Install the connecting plate 6 on the tail of the pair of fixation pins 2, and screw the pair of locking screws into the threaded holes to press the tail of the fixation pins 2 tightly.
[0055] 11、Pull the binding wire 9 outward, and the binding wire 9 is wound on the connecting pin 3. The binding wire 9 is blocked by the connecting pin 3 from being pulled out completely. One end of the binding wire 9 is bound on the distal side of the connecting pin 3, and the other end of the binding wire 9 is bound on the connecting plate 6, and the knot is tied. The limiting groove on the connecting plate 6 plays a role in limiting the sliding of the binding wire 9.
[0056] 12、Insert the end fixation pin 10 into the proximal end of the tubular bone 1, penetrate the bone cortex on both sides of the tubular bone 1, and be located between the pair of fixation pins 2.
[0057] By increasing the binding wire 9, the longitudinal stress is increased, the rotation resistance is increased, the separation resistance is increased, and the displacement is prevented.
[0058] Example 3: as shown in the accompanying Figure 5 and the accompanying Figure 6 .
[0059] 1、Open the hole at the top end of the tubular bone 1 by using the intramedullary needle opening device through surgery.
[0060] 2、Insert the guide pin 4 into the lumen through the top end opening, penetrate the transverse fracture line, and enter the distal end of the tubular bone.
[0061] 3、The intramedullary needle guide 5 is guided by the guide pin 4, inserted into the lumen, and enters the distal end of the tubular bone 1, resets the fracture, and aligns the fractured tubular bone 1.
[0062] 4、Insert a pair of fixation pins 2 into the tubular bone 1 along the needle insertion hole of the intramedullary needle guide 5, and the needle end of the fixation pin 2 is in the distal epiphysis of the tubular bone 1.
[0063] 5、Pull out the guide pin 4 for the first time.
[0064] 6、The binding wire 9 is sleeved in the wire pushing groove 8 on the head of the guide pin 4, the guide pin 4 is inserted into the tubular bone 1, and the binding wire 9 is sent to the distal end of the tubular bone 1.
[0065] 7、Pull out the intramedullary needle guide 5.
[0066] 8、Insert the connecting pin 3 and the blocking pin 11 into the tubular bone 1 on both sides of the transverse fracture line in turn, penetrate the bone cortex on both sides of the tubular bone 1, and pass through the pin insertion avoidance slot 7 on the guide pin 4. The insertion position of the connecting pin 3 and the blocking pin 11 is guided through the pin insertion avoidance slot 7, so that the blocking pin 11 is located in the binding wire 9.
[0067] 9、Pull out the guide pin for the second time.
[0068] 10. The connecting plate 6 is installed on the tail of the pair of fixation pins 2, and a pair of locking screws are screwed into the threaded holes of the connecting plate 6 to press and fix the tail of the fixation pins 2.
[0069] 11. The binding wire 9 is pulled outwards, and the binding wire 9 is wound on the blocking pin 11 and blocked by the blocking pin 11. One end of the binding wire 9 is bound on the blocking pin 11, and the other end of the binding wire 9 is bound on the connecting plate 6 and knotted. The groove on the connecting plate 6 plays a role of limiting the sliding of the binding wire 9.
[0070] 12. The end fixation pin 10 is inserted into the proximal end of the tubular bone 1, penetrates the bone cortex on both sides of the tubular bone 1, and is located between the pair of fixation pins 2.
[0071] The blocking pin 11 is added, which plays a role of blocking the up and down movement of the pair of fixation pins 2, functions as a lag screw when the fracture line is inclined, simultaneously plays a role of separating the needle head end of the pair of fixation pins 2, and increases the anti-rotation effect. The winding position of the binding wire 9 is changed, the longitudinal mechanical force line is lengthened, and the stability is better.
[0072] Example 4: as shown in Figs. 4A and 4B. Figure 7 and Figs. 5A and 5B. Figure 8
[0073] 1. The top end of the tubular bone 1 is drilled by the intramedullary pin drill.
[0074] 2. The guide pin 4 is inserted into the lumen through the top end drilling, penetrates the transverse fracture line, and enters the distal end of the tubular bone 1.
[0075] 3. The intramedullary pin guide 5 is guided by the guide pin 4, inserted into the lumen, and enters the distal end of the tubular bone 1 to reduce the fracture and align the fractured tubular bone 1.
[0076] 4. The pair of fixation pins 2 are inserted into the tubular bone 1 through the pin holes of the intramedullary pin guide 5, and the needle head end of the fixation pin 2 is in the distal end epiphysis of the tubular bone 1.
[0077] 5. The guide pin 4 is pulled out.
[0078] 6. The threading hole is drilled at the distal end of the tubular bone 1.
[0079] 7. The pull wire shuttle 13 is inserted into the distal end of the tubular bone 1 along the guide pin hole, and the shuttle hole 12 at the end of the pull wire shuttle 13 is in communication with the threading hole.
[0080] 8. The binding wire 9 is threaded along the threading hole and located in the shuttle hole 12 at the end of the pull wire shuttle 13, and the two ends of the binding wire 9 are knotted.
[0081] 9. The intramedullary pin guide 5 and the pull wire shuttle 13 are taken out together, the pulled-out binding wire 9 is cut off, the cut-off part of the binding wire 9 is bound on the connecting plate 6, the knotted end of the binding wire 9 is pressed on the drilling of the threading hole, and the maximum pulling distance of the binding wire 9 is limited.
[0082] 10. The end fixation peg 10 is inserted into the proximal end of the tubular bone 1, penetrating the bone cortex on both sides of the tubular bone 1, and located between the pair of fixation pins 2.
[0083] The binding wire 9 makes the force line more evenly distributed, and has good mechanical properties. There are fewer components, and the operation difficulty is reduced.
[0084] The connecting peg 3 is made of pressurized memory alloy.
Claims
1. A minimally invasive system for fixing tubular bones both inside and outside the medullary cavity, comprising a pair of fixation pins (2) inserted into the tubular bone (1), characterized in that, A connecting pin (3) for fixing the tubular bone (1) from the side is provided between a pair of fixing pins (2), and the connecting pin (3) is inserted into the tubular bone (1) on both sides of the transverse fracture line.
2. The minimally invasive system for fixing tubular bones both inside and outside the medullary cavity according to claim 1, characterized in that, A guide pin (4) is inserted into the end of the tubular bone (1), and an intramedullary nail guide (5) is inserted along the guide pin (4). A pair of needle holes are opened on the intramedullary nail guide (5), and a pair of fixation pins (2) are inserted into the tubular bone (1) along the needle holes.
3. The minimally invasive system for fixing tubular bones both inside and outside the medullary cavity according to claim 2, characterized in that, Remove the intramedullary needle guide (5). A connecting plate (6) is provided at the tail of a pair of fixing needles (2). A pair of needle holes are opened on the connecting plate (6). The tail of the fixing needle (2) is located in the needle hole and is locked by a locking screw. The tail of the pair of fixing needles (2) is fixed by the connecting plate (6).
4. The minimally invasive system for fixing tubular bones both inside and outside the medullary cavity according to claim 3, characterized in that, The guide pin (4) has a nail-avoiding groove (7) and a push-line groove (8) at the end of the guide pin (4). The binding line (9) is put on the push-line groove (8) and one end of the binding line (9) is pushed into the tubular bone (1) through the guide pin (4).
5. The minimally invasive system for fixing tubular bones both inside and outside the medullary cavity according to claim 4, characterized in that, The connecting pin (3) is a U-shaped pin. The connecting pin (3) is inserted into the tubular bone (1) along the pin-avoiding groove (7). The guide pin (4) is pulled out, and the other end of the binding line (9) is pulled back so that one end of the binding line (9) is wrapped around the connecting pin (3) and the other end of the binding line (9) is tied to the connecting plate (6).
6. The minimally invasive system for fixing tubular bones both inside and outside the medullary cavity according to claim 5, characterized in that, A terminal fixation pin (10) is inserted into the tubular bone (1) near the tail of the fixation pin (2), and the terminal fixation pin (10) is located between a pair of fixation pins (2).
7. The minimally invasive system for fixing tubular bones both inside and outside the medullary cavity according to claim 4, characterized in that, The connecting pin (3) is a U-shaped pin. The connecting pin (3) is inserted into the tubular bone (1) along the pin clearance groove (7). The blocking pin (11) is inserted along the pin clearance groove (7). The guide pin (4) is pulled out. The other end of the binding line (9) is pulled back so that one end of the binding line (9) is wrapped around the blocking pin (11). The other end of the binding line (9) is tied to the connecting plate (6). The end fixing pin (10) is inserted into the tubular bone (1) near the tail of the fixing pin (2) and is located between a pair of fixing pins (2).
8. The minimally invasive system for fixing tubular bones both inside and outside the medullary cavity according to claim 2, characterized in that, Insert the pull-line shuttle (13) along the intramedullary nail guide (5). The head of the pull-line shuttle (13) has a fusiform hole (12). The tubular bone (1) has a through hole that communicates with the fusiform hole (12). Insert the binding line (9) into the through hole and the fusiform hole (12). Tie the two ends of the binding line (9) together to prevent the two ends of the binding line (9) from entering the through hole. Pull out the pull-line shuttle (13) and the intramedullary nail guide (5). The pull-line shuttle (13) pulls the binding line (9) out to the outside of the tubular bone (1). Install the connecting plate (6) at the tail of the pull-line shuttle (13). Tie the binding line (9) to the connecting plate (6).
9. The minimally invasive system for fixing tubular bones both inside and outside the medullary cavity according to claim 8, characterized in that, The end fixation pin (10) is inserted into the tubular bone (1) near the tail of the fixation pin (2), with the end fixation pin (10) located between a pair of fixation pins (2).
10. The minimally invasive system for fixing tubular bones both inside and outside the medullary cavity according to any one of claims 3-9, characterized in that, The connecting plate (6) is oblong. At least one threaded hole is opened on the top arc and bottom arc of the connecting plate (6). The locking screw is screwed into the threaded hole to fix the tail of the fixing pin (2). A pair of limiting grooves are mirrored in the middle of the connecting plate (6). The binding line (9) is located in the limiting groove to prevent the binding line (9) from swinging.