CN209847349U

CN209847349U - Novel infant shin bone intramedullary fixation needle device through ankle

Info

Publication number: CN209847349U
Application number: CN201920196228.0U
Authority: CN
Inventors: 梅海波
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-02-14
Filing date: 2019-02-14
Publication date: 2019-12-27
Anticipated expiration: 2029-02-14

Abstract

The utility model discloses a novel infant shin bone intramedullary fixation needle device through ankle, which comprises a guide needle, an intramedullary needle and a hexagonal wrench, wherein the intramedullary needle is tubular, a tube cavity with an inner diameter larger than the diameter of the guide needle is arranged in the middle of the intramedullary needle, the tail part of the intramedullary needle is provided with a fixing part, the outer side of the fixing part is provided with an external thread, the inner side of the fixing part is provided with an inner hexagonal hole, and the inner diameter of the inner hexagonal hole is larger than that of the tube cavity; the center of the hexagonal wrench is provided with a through hole with the inner diameter larger than the diameter of the guide pin. The utility model discloses can effectively fix the shin bone behind the fracture, it is convenient to install, has improved the efficiency of operation.

Description

Novel infant shin bone intramedullary fixation needle device through ankle

Technical Field

The utility model relates to an internal fixation technical field, concretely relates to novel infant is through ankle shin bone marrow internal fixation needle device.

Background

The intramedullary rod technique, or intramedullary nail technique, is an internal fixation technique for fixing long bone fractures by placing a metal rod or nail in the bone marrow cavity, which uses a metal rod called an intramedullary rod (as shown in the figure). The initial intramedullary rod was fixed with metal rods used in Hey-Groves in 1916 and was abandoned due to various complications. In 1939 Kuntscher first introduced the intramedullary nail technique and established the biomechanical principle of the intramedullary splint. In the 50's of the 20 th century, Kuntscher introduced a medullary cavity filing technique that enabled intramedullary nails to fit more accurately into the medullary cavity of the bony stem, thereby improving fixation. The Kuntscher's "bayonet" concept is the precursor of the recent internal locking concept, expanding the indications of intramedullary nailing. In the early 80 s of the 20 th century, intramedullary fixation such as an end nail, a Lottes nail and the like has been widely used for various long diaphysis fractures. With the increasingly perfect locking technology, the intramedullary nail has the characteristics of strong internal fixation, small stress shielding, reduction away from the fracture end and small damage to blood supply at the fracture end, which are fully embodied. Today, intramedullary nails, including interlocking intramedullary nails, are important methods for treating long tubular fractures of the extremities.

However, as the technical principle is applied to special diseases of children of small age, such as osteogenesis imperfecta, congenital tibial artificial joints and the like, the problems which cannot be solved by the intramedullary rod appear: due to the specificity of these diseases, intramedullary rods implanted in long bones must remain in the long bone marrow cavity for a long period of time to prevent the occurrence of angulation deformities and re-fractures; however, due to the continuous growth of children, the whole bone length is lengthened, the intramedullary rod is relatively shortened, and the tail end of the intramedullary rod is gradually far away from the metaphysis in a short time, so that the protection effect of the intramedullary rod is lost on the far bone at the tail end of the intramedullary rod, local deformation and angular deformity gradually occur, and finally, the fracture at the junction of the tail end of the intramedullary rod inevitably occurs. At present, the tibia intramedullary rod can be prolonged in clinic, and the far end of the inner core is easy to displace. And the inner core has small diameter, so the inner core can not well maintain the mechanical axis of the tibia and can not achieve the good function of preventing the occurrence of the re-fracture.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel infant shin bone intramedullary fixation needle device through ankle to solve.

The utility model discloses a novel infant shin bone intramedullary fixation needle device through ankle, which comprises a guide needle, an intramedullary needle and a hexagonal wrench, wherein the intramedullary needle is tubular, a tube cavity with an inner diameter larger than the diameter of the guide needle is arranged in the middle of the intramedullary needle, a fixing part is arranged at the tail part of the intramedullary needle, an external thread is arranged at the outer side of the fixing part, a hexagon socket hole is arranged at the inner side of the fixing part, and the inner diameter of the hexagon socket hole is larger than that of the tube cavity; and a through hole with the inner diameter larger than the diameter of the guide pin is formed in the center of the hexagonal wrench.

Further, the guide pin is a kirschner wire.

Further, the hexagonal wrench is T-shaped.

Further, the guide pin has a diameter of 1.5 ~ 2mm, the main body part of the intramedullary needle has an outer diameter of 3.0 ~ 3.2.2 mm, the fixing part has an outer diameter of 6.0 ~. mm, and the fixing part has a length of 2 cm.

The utility model discloses an implantation method, the step is as follows:

the method comprises the following steps: passing the guide pin into the medullary cavity of tibia from calcaneus, epiphysis and epiphysis, as shown in the figure, a small section of ankle at the tail of the guide pin is exposed outside the calcaneus;

step two: the intramedullary needle is sleeved from the tail end of the guide needle and then penetrates into the marrow cavity of the tibia along the guide needle until the fixing part contacts with the calcaneus; sheathing the fixing part from the tail end of the guide pin by using a hexagonal wrench, inserting the fixing part into the inner hexagonal hole, and screwing the external thread into the calcaneus until 1cm of the fixing part is left and is not screwed into the calcaneus, wherein the fixing part is completely positioned under the skin;

step three: after the guide pin is removed, the final implantation effect is obtained.

The beneficial effects of the utility model are that, can effectively fix the shin bone behind the fracture, it is convenient to install, has improved the efficiency of operation.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the first embodiment of the present invention in an implanted state;

FIG. 3 is a schematic view of the second embodiment of the present invention in an implanted state;

FIG. 4 is a schematic view of the implant device in a bone-implanted state;

in the drawings: 1. guide pin, 2, intramedullary pin, 21, lumen, 22, fixing part, 221, external thread, 222, hexagon socket, 3, hexagon wrench, 31, through hole.

Detailed Description

The following embodiments are described in detail with reference to the following examples:

as shown in fig. 1, a novel intramedullary fixation needle device for an infant tibia through ankle comprises a guide needle 1, an intramedullary needle 2 and a hexagonal wrench 3, wherein the intramedullary needle 2 is tubular, a tube cavity 21 with an inner diameter larger than that of the guide needle 1 is arranged in the middle of the intramedullary needle, a fixing part is arranged at the tail part of the intramedullary needle 2, an external thread 221 is arranged at the outer side of the fixing part 22, a hexagon socket 222 is arranged at the inner side of the fixing part 22, the hexagon socket 222 is T-shaped, and the inner diameter of the hexagon socket is larger than that of the tube cavity 21; the center of the hexagonal wrench 3 is provided with a through hole 31 with an inner diameter larger than the diameter of the guide pin 1.

The guide needle 1 is a Kirschner wire with a diameter of 1.5 ~ 2mm, the outer diameter of the main body part of the intramedullary needle 2 is 3.0 ~ 3.2.2 mm, the outer diameter of the fixing part 22 is 6.0 ~ 6.2.2 mm, and the length of the fixing part 22 is 2 cm.

The utility model discloses an implantation method, the step is as follows:

the method comprises the following steps: passing guide pin 1 into the medullary cavity of tibia from calcaneus, epiphysis and epiphysis, as shown in fig. 1, with a small section of ankle at the tail of guide pin 1 exposed outside the calcaneus, as shown in fig. 2 in a first implantation state;

step two: the intramedullary needle 2 is sleeved from the tail end of the guide needle 1 and then penetrates into the marrow cavity of the tibia along the guide needle 1 until the fixing part 22 contacts with the calcaneus; using a hexagonal wrench 3 to sleeve the guide pin 1 from the tail end, then inserting the hexagonal wrench 3 into the hexagon socket 222, and screwing the external thread 221 into the calcaneus until 1cm of the fixing part 22 is not screwed into the calcaneus, wherein the fixing part 22 is completely positioned under the skin at the moment, and the implantation state II is shown in the position shown in fig. 3;

step three: after the guide pin 1 is removed, the final implantation effect is obtained, and the implantation state is three as shown in fig. 4.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be considered to be within the protection scope of the present invention.

Claims

1. A novel intramedullary fixation needle device for shin bones of infants through ankles is characterized by comprising a guide needle, an intramedullary needle and a hexagonal wrench, wherein the intramedullary needle is tubular, a tube cavity with the inner diameter larger than that of the guide needle is arranged in the middle of the intramedullary needle, a fixing part is arranged at the tail part of the intramedullary needle, external threads are arranged on the outer side of the fixing part, an inner hexagonal hole is arranged on the inner side of the fixing part, and the inner diameter of the inner hexagonal hole is larger than that of the tube cavity; and a through hole with the inner diameter larger than the diameter of the guide pin is formed in the center of the hexagonal wrench.

2. The novel infant transankle tibial intramedullary fixation needle device of claim 1, wherein the guide needle is a k-wire.

3. The novel infant transankle tibial intramedullary fixation needle device of claim 2, wherein the hexagonal wrench is T-shaped.

4. The novel infant transankle tibial intramedullary fixation needle device according to claim 3, wherein the guide needle is 1.5 ~ 2mm in diameter, the main body part of the intramedullary needle is 3.0 ~ 3.2.2 mm in outer diameter, the fixing part is 6.0 ~. mm in outer diameter, and the fixing part is 2cm in length.