CN215994197U

CN215994197U - Minimally invasive patella internal fixation device

Info

Publication number: CN215994197U
Application number: CN202121610752.1U
Authority: CN
Inventors: 李永杰; 王博; 樊垒; 崔克玲
Original assignee: Tianjin Zhengtian Medical Instrument Co Ltd
Current assignee: Tianjin Zhengtian Medical Instrument Co Ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2022-03-11
Anticipated expiration: 2031-07-15

Abstract

The utility model provides a minimally invasive patella internal fixation device, which belongs to the technical field of orthopedic medical instruments and comprises a main nail and fixing nails, wherein a plurality of through holes penetrating through the main nail are formed in the main nail, the through holes are arranged in a staggered mode, the fixing nails are arranged in the through holes, the fixing nails penetrate through the main nail after being implanted, and the diameter of the through holes is larger than that of a fixing nail rod. This fixing device in wicresoft's patella structural design is simple reasonable for it is simple to fix the patella mode, can reduce the stimulation to the patient, has guaranteed that the fracture is stable, and there is certain little momentum in the fracture position, can amazing fracture growth, healing with higher speed.

Description

Minimally invasive patella internal fixation device

Technical Field

The utility model belongs to the technical field of orthopedic medical instruments, and particularly relates to a minimally invasive patella internal fixation device.

Background

In the field of orthopedic medical treatment, patellar fracture is a common injury type, and is usually fixed by using bone plates, kirschner wires, cables and other modes, which are usually open type operations, so that the injury to a patient is large, the peripheral nerve vessels of the patella are few, ligaments are many, and the patient is seriously injured by the open type operations and is not easy to recover; the bone plate or the cable is implanted into a human body for a long time, and rubs with tissues for a long time, so that the generated pain and discomfort can be strong, and the implant can be clearly touched due to thinner skin, the experience of a patient is reduced, different degrees of troubles are caused, and the operation time and difficulty are increased for doctors.

SUMMERY OF THE UTILITY MODEL

The minimally invasive patella internal fixation device is a minimally invasive internal fixation device, has small wound and is more beneficial to fracture healing.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a fixing device in wicresoft's patella, includes main nail and staple, be provided with a plurality of through-holes that run through main nail on the main nail, a plurality of through-holes are crisscross to be set up, and the staple sets up in the through-hole, and implants the back staple and wear out main nail, and the diameter of through-hole is greater than the diameter of staple nail pole.

Furthermore, the through holes are uniformly distributed in multiple rows along the axis of the main nail.

Further, the included angle between the center lines of the adjacent through holes is 10-90 degrees.

Further, the through hole is a light hole.

Further, the main nail is a solid rod or a hollow rod.

Further, the outer surface of the main nail is a smooth surface or a threaded surface.

Further, the length of the main nail is 30-50 mm, and the cross-sectional diameter is 4-10 mm.

Furthermore, the initial end of main nail is provided with first screw hole, is located be provided with evenly distributed's a plurality of constant head tanks around the first screw hole, every the constant head tank with the initial terminal surface of main nail sets up perpendicularly.

Further, the tail end of the main nail is provided with a conical head, and the conical head is of a flat head structure or a self-tapping structure.

Furthermore, the minimally invasive patella internal fixation device further comprises a small fracture block fixing nail, a second threaded hole is formed in the tail end of the main nail along the axial direction, and the small fracture block fixing nail and the second threaded hole are matched to fix the small fracture block.

The utility model has the following beneficial effects for the prior art:

the minimally invasive patella internal fixation device provided by the utility model adopts a minimally invasive concept design, and aiming at different fracture types, the fixation nails are implanted into corresponding fracture positions and can be used for auxiliary fixation, and the diameter of the through hole on the main nail is slightly larger than the diameter of the nail rod of the fixation nail, so that micromotion can be generated between fractures after fixation, the bone growth can be stimulated, the fracture healing is promoted, and the problem of large open surgery injury is solved;

according to the minimally invasive patella internal fixation device provided by the utility model, because the patella nails are fixed in the patella, no convex or external leakage structure exists, a postoperative patient cannot feel at all, and the problem of pain caused by friction tissues is solved;

according to the minimally invasive patella internal fixation device, the first threaded hole and the positioning groove are processed at the initial end of the main nail, so that clamping and fixation in multiple directions are facilitated;

the minimally invasive patella internal fixation device provided by the utility model is characterized in that a second threaded hole is formed in the tail end of the main nail, and is close to one side of the second threaded hole, if a small fracture block exists, the hole site of the main nail stem cannot be effectively fixed, and the second threaded hole is matched with a locking screw to be used for fixing the small fracture block.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of a smooth main nail;

FIG. 2 is a cross-sectional view of C-C of FIG. 1;

FIG. 3 is a schematic structural view of a threaded main nail;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 5 is a cross-sectional view A-A of FIG. 3;

FIG. 6 is a schematic structural view of a first threaded hole;

FIG. 7 is a schematic view of a cone structure of the self-tapping structure;

FIG. 8 is a schematic view of the structure of the main nail and the fixing nail;

fig. 9 is a cross-sectional view of the primary staple engaged with the anchor staple.

In the figure:

1-main nail; 2-a first threaded hole; 3-positioning a groove; 4-a through hole; 5-a conical head; 6-a second threaded hole; 7-fixing nails.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment is described with reference to fig. 1 to 9, and the minimally invasive patella nail includes a main nail 1, which is further optimized, the length of the main nail 1 is 30 mm to 50 mm, such as 32mm, 35mm, 40mm, or 45mm, and main nails with different lengths may be selected according to the requirements of a patient for use, the main nail 1 is a solid rod or a hollow rod, the solid rod is more accurately positioned, the hollow rod has lighter weight, the cross-sectional diameter of the main nail 1 is 4 mm to 10 mm, such as 4.5mm, 5mm, 6mm, or 8mm, so as to meet the requirements of a minimally invasive surgery, the outer surface of the main nail 1 is a smooth surface or is provided with threads, the smooth main nail can be directly connected with a sighting frame for use, the main nail of the threads needs to be screwed in, and fixation is achieved by means of a driving handle.

The initial end of main nail 1 is provided with first screw hole 2, is located processing has constant head tank 3 around first screw hole 2, the number of constant head tank 3 is a plurality of, if can be 3 or 5 etc. and with the perpendicular setting of initial terminal surface of main nail 1 can correspond a plurality of different position like this and fix, conveniently carries out the chucking of a plurality of directions and fixes.

The main nail 1 is provided with a plurality of through holes 4 penetrating through the main nail 1, the through holes 4 are uniformly distributed in a plurality of rows, such as 2 rows, 3 rows or 4 rows, along the axial direction of the main nail 1, every two rows of the through holes 4 are mutually staggered, the included angle between the central lines of the adjacent through holes is 10 degrees to 90 degrees, such as 20 degrees, 30 degrees, 45 degrees, 50 degrees or 70 degrees, and the like, so that the fixing nail 7 can be used when different-angle fractures are fixed, the fixing nail 7 (locking nail or leather nail) passes through the through hole of the rod part of the main nail through a sighting device and penetrates out of the main nail 1, the two ends of the fracture are fixed in a crossing way at different angles, the fixing nail 7 can be embedded into a patella to reduce the stimulation of the nail cap to a patient, and the fixing nail 7 is implanted from the two ends of the fracture in a plurality of angles to form a spatial three-dimensional structure, so as to ensure the stability of the fracture, the optimization, the through holes are unthreaded holes, and the diameter of the through holes 4 is larger than that of the fixing nail 7, therefore, the fracture nail is not stably connected with the fixing nail 7, a small amount of gaps exist, and the fracture position has certain micro momentum, so that the fracture growth can be stimulated, the healing is accelerated, and the difficult problem of large injury in open surgery is solved.

The distribution of the through holes 4 on the main nail 1 can be various, and is not limited to be uniformly distributed on the main nail 1 along the axis of the main nail 1 in multiple rows, and the distribution form can be set according to actual needs. However, the main nail 1 is uniformly distributed along the axis in multiple rows and is distributed in a staggered manner, so that the processing is convenient, and the mechanical strength of each part of the main nail 1 is convenient to control, therefore, the main nail is the preferred scheme.

Preferably, the conical head 5 is of a flat head structure or a self-tapping structure, and the flat head structure and the self-tapping structure can be matched with the smooth main nail or the threaded main nail for random combination.

Fixing device in wicresoft's patella still includes ossicle fracture piece staple (not shown in the figure), is located the tail end of main nail 1 is provided with second screw hole 6 along the axial, and ossicle fracture piece staple is close to 6 one sides of second screw hole with the fixed ossicle fracture piece of second screw hole cooperation, if there is ossicle fracture piece, 1 cadre hole site of main nail can't effectively be fixed to it again, and 6 cooperation locking screws of second screw hole this moment can be used for fixed ossicle fracture piece.

The implantation method of the minimally invasive patella internal fixation device comprises the following steps:

the main nail is implanted into the patella, and then the fixing nail and/or the small fracture block fixing nail are implanted according to the requirement by combining the sighting device.

The minimally invasive patella internal fixation device provided by the utility model has the advantages that the structure adopts a minimally invasive concept design, the fixation nails 7 are implanted into corresponding fracture positions according to different fracture types, the fixation nails 7 can be used for auxiliary fixation, and the diameter of the through hole 4 on the main nail 1 is slightly larger than the diameter of the nail rod of the fixation nail 7, so that micromotion can be caused between fractures after fixation, the bone growth can be stimulated, the fracture healing is promoted, and the problem of large damage in open surgery is solved; the whole structure is implanted by adopting a minimally invasive therapy, all implants do not protrude and have no exposed structure, the stimulation of soft tissues is reduced, the purpose of fracture fixation is fulfilled while stable fixation is provided and on the premise of minimal intraoperative trauma, postoperative patients cannot feel at all, and the problem of pain caused by friction of tissues is solved; the first threaded hole 2 and the positioning groove 3 are processed at the initial end of the main nail 1, so that clamping and fixing in multiple directions are facilitated; the tail end that lies in main nail 1 is processed and is had second screw hole 6, is close to second screw hole 6 one side, if when having little fracture piece, 1 cadre hole site of main nail can't effectively be fixed to it again, and 6 cooperation locking screws of second screw hole can be used to fixed little fracture piece this moment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a fixing device in wicresoft's patella, its characterized in that includes main nail (1) and staple (7), be provided with a plurality of through-holes (4) that run through main nail on main nail (1), a plurality of through-holes (4) are crisscross to be set up, and the staple sets up in through-hole (4), and just implants back staple and wear out main nail (1), and the diameter of through-hole (4) is greater than the diameter of staple stick.

2. The minimally invasive intra-patellar fixation device according to claim 1, wherein the plurality of through holes (4) are uniformly distributed in multiple rows along the axis of the main nail (1).

3. The minimally invasive intra-patellar fixation device according to claim 1, wherein the included angle between the center lines of adjacent through holes (4) is 10 ° -90 °.

4. Minimally invasive intra-patellar fixation device according to claim 1, wherein the through hole (4) is a light hole.

5. The minimally invasive intra-patellar fixation device according to claim 1, wherein the main nail (1) is a solid or hollow rod.

6. The minimally invasive intra-patellar fixation device according to claim 5, wherein the outer surface of the main nail (1) is smooth or threaded.

7. The minimally invasive intra-patellar fixation device according to claim 1, wherein the main nail (1) has a length of 30-50 mm and a cross-sectional diameter of 4-10 mm.

8. The minimally invasive patellar internal fixation device according to claim 1, wherein a first threaded hole (2) is formed at an initial end of the main nail (1), a plurality of positioning grooves (3) are uniformly distributed around the first threaded hole (2), and each positioning groove (3) is perpendicular to an initial end surface of the main nail (1).

9. The minimally invasive intra-patellar fixation device according to claim 1, characterized in that a taper head (5) is provided at the tail end of the main nail (1), and the taper head (5) is of a flat head structure or a self-tapping structure.

10. The minimally invasive patellar internal fixation device according to claim 1, further comprising a small fracture block fixing nail, wherein a second threaded hole (6) is axially formed in the tail end of the main nail (1), and the small fracture block fixing nail is matched with the second threaded hole (6) to fix the small fracture block.