CN210784626U - Intramedullary nail - Google Patents
Intramedullary nail Download PDFInfo
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- CN210784626U CN210784626U CN201921087633.5U CN201921087633U CN210784626U CN 210784626 U CN210784626 U CN 210784626U CN 201921087633 U CN201921087633 U CN 201921087633U CN 210784626 U CN210784626 U CN 210784626U
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- intramedullary nail
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- intramedullary
- rod
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Abstract
The intramedullary nail comprises an intramedullary nail rod, wherein the far end and the near end of the intramedullary nail rod are respectively provided with a locking nail hole, and the intramedullary nail is characterized in that the outer surface of the intramedullary nail rod is provided with at least three convex marking bodies which are not on the same straight line, and the marking bodies are used for positioning the space position of each locking nail hole. Because the outer surface of the intramedullary nail rod is provided with at least three convex marking bodies which are not on the same straight line, the spatial positions of all the locking nail holes are positioned through the marking bodies, the locking nails can be nailed into the locking nail holes in an invisible state, the radiation is reduced, and the problem that the precision is influenced because the intramedullary nail rod deforms can not be caused.
Description
Technical Field
The invention relates to the technical field of intramedullary nails, in particular to an intramedullary nail.
Background
The intramedullary nail structure is provided with an intramedullary nail rod, a near-end locking screw hole is arranged at the near end of the intramedullary nail rod, and a pressure reduction plane is arranged on the surface of the intramedullary nail rod. More than one strip-shaped decompression plane is arranged on the surface of the intramedullary nail rod, and the decompression plane can extend from the proximal end of the intramedullary nail rod to the distal end of the intramedullary nail rod. The proximal end of the intramedullary nail rod is provided with a locking screw rod positioning screw hole and a connecting sleeve positioning groove. The traditional intramedullary nails mainly comprise femoral intramedullary nails, tibial intramedullary nails, humeral intramedullary nails, ulna intramedullary nails and radius intramedullary nails.
Intramedullary nails are ideal internal plants for treating bone fracture of the shaft, and the intramedullary nail fixing operation is an operation of inserting intramedullary nails with proper size and length into bone marrow cavities at two sides of the fracture end to fix the fracture. Through minimally invasive techniques, the intramedullary nail can provide good stability while reducing soft tissue injury in the fracture region. Avoiding further damage to the soft tissue surrounding the fracture area may promote vascularization, aiding in the formation of bridging. The bone-intramedullary nail femur allows for early loading and promotes healing.
The following problems exist in intramedullary nail applications:
1. the conventional intramedullary nail fixation often has the problem that the locking nail is difficult to lock, particularly at the far end, after the intramedullary nail is driven into the bone marrow, a doctor is required to find the locking nail hole on the intramedullary nail by the locking nail through the skin and the affected bone, and the intramedullary nail is possibly deformed to different degrees in the process of driving into the affected bone, so that the positioning is difficult.
2. Due to the difficulty of positioning and locking, surgeons often take X-ray films during surgery, averaging five to sixty times, or even one to two hundred times. On the one hand, the X-ray radiation dose can affect the health of the patient and the doctor, and on the other hand, if the nail is not driven into the lock hole or is not stably locked and needs to be driven again, the bone near the implantation point can be damaged, and the postoperative recovery of the patient is adversely affected.
Disclosure of Invention
The application provides an intramedullary nail, the surface of this intramedullary nail pole is equipped with at least three not protruding mark body on a straight line, fixes a position the spatial position in each lock nail hole through the mark body, can not only reduce the radiation with the lock nail under invisible state in the lock nail hole, can not produce in addition because the intramedullary nail pole warp the problem that influences the precision.
The intramedullary nail comprises an intramedullary nail rod, and the far end and the near end of the intramedullary nail rod are respectively provided with a locking nail hole.
In one embodiment, the marker body is made of the same material or different material from the intramedullary nail.
In one embodiment, the marker is a square structure, a spherical structure or a triangular structure.
In one embodiment, the number of markers is three: the intramedullary nail locking device comprises a first marker, a second marker and a third marker, wherein the first marker is arranged at the center of the far end of the intramedullary nail rod, the second marker is arranged at the inner side of a first preset distance of a proximal locking hole of the intramedullary nail rod, and the third marker is arranged at the outer side of a second preset distance of the proximal locking hole of the intramedullary nail rod.
In one embodiment, the first predetermined distance and the second predetermined distance are at least 10mm or more.
According to the intramedullary nail of the embodiment, the outer surface of the intramedullary nail rod is provided with at least three convex marking bodies which are not on the same straight line, and the spatial positions of the locking nail holes are positioned through the marking bodies, so that the locking nail can be nailed into the locking nail holes in an invisible state, radiation is reduced, and the problem that the precision is influenced due to the deformation of the intramedullary nail rod is avoided.
Drawings
FIG. 1 is a view of the structure of an intramedullary nail;
fig. 2 is a schematic illustration of an intramedullary nail in use.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.
As shown in fig. 1, the intramedullary nail comprises an intramedullary nail rod 1, the distal end and the proximal end of the intramedullary nail rod 1 are respectively provided with a locking nail hole 2, the outer surface of the intramedullary nail rod 1 is provided with at least three convex marking bodies 3 which are not on a straight line, and the marking bodies 3 are used for positioning the spatial position of each locking nail hole 2.
The relative position of each marker 3 in the intramedullary nail rod 1 is known and the position of each marker 3 in the intramedullary nail rod 1 relative to each locking hole 2 is also known.
In one embodiment, the material of the marker 3 is the same as that of the intramedullary nail, so that when the intramedullary nail is manufactured, the outer surface of the intramedullary nail rod 1 can be directly protruded outwards to form the marker 3, that is, the marker 3 and the intramedullary nail rod 1 are integrally manufactured.
In another embodiment, the marker 3 is made of a material different from that of the intramedullary nail, for example, the marker 3 may be made of a reflective material, and when the marker is specifically manufactured, the intramedullary nail rod 1 is manufactured first, then the marker 3 is manufactured, and then the marker 3 is combined and protruded to the outer surface of the intramedullary nail rod 1.
The specific shape of the marker 3 is not limited, for example, the marker 3 may be a square structure, a spherical structure, a triangular structure, or other specific shapes as long as the marker 3 can be clearly identified.
Based on the three-point positioning principle, therefore, the number of the markers 3 on the original side is only required to be greater than or equal to three, and in practical application, the specific number of the markers 3 can be designed according to practical requirements, in this example, the number of the markers 3 is preferably three: the intramedullary nail comprises a first marker 31, a second marker 32 and a third marker 33, wherein the first marker 31 is arranged at the center of the far end of the intramedullary nail rod 1, the second marker 32 is arranged at the inner side of the near-end locking hole 2 of the intramedullary nail rod 1 at a first preset distance, and the third marker 33 is arranged at the outer side of the near-end locking hole 2 of the intramedullary nail rod 1 at a second preset distance; preferably, the first preset distance and the second preset distance are at least 10mm or more, and in other embodiments, the first preset distance and the second preset distance may be greater than 10mm, or less than 10mm, depending on the actual situation.
The application of intramedullary nails to the femur is exemplified below.
Because a doctor uses the C-shaped arm to emit X-rays from one direction to penetrate through a human body, and then the X-rays are processed by the X-ray receiving and converting device and the image processing and analyzing system to obtain an image, the doctor can only see the image in one direction, the position and the depth are not easy to judge, and the defect that the accurate positioning of the image of the operation part cannot be realized exists. As shown in fig. 2, based on a biplane X-ray system, the geometric principle of visual three-dimensional imaging of a computer is used for positioning, and a digital image processing technology is used for determining the geometric position of a target point in a three-dimensional reference coordinate system by finding a calibration point (three markers with known relative positions on an intramedullary nail rod) and the target point (a locking nail hole on the intramedullary nail rod) on two-dimensional images with different angles, so as to realize the accurate locking of the locking nail hole.
Specifically, the biplane X-ray system includes a first X-ray system and a second X-ray system, the first X-ray system includes a first X-ray emitting device 4 and a first X-ray receiving device 5 used in pair, and the second X-ray system includes a second X-ray emitting device 6 and a second X-ray receiving device 7 used in pair; the first X-ray receiving device 5 and the second X-ray receiving device 7 are respectively positioned in different directions relative to the intramedullary nail, so that the first X-ray receiving device 5 and the second X-ray receiving device 7 collect each marking body 3 and each locking nail hole 2 on the intramedullary nail rod 1 according to different angles; the control device is also arranged in a matched manner, controls the first X-ray emitting device 4 and the second X-ray emitting device 6 to emit X-rays, and calculates the actual position and direction of each locking nail hole 2 in the space according to the imaging positions of the mark body 3 on the first X-ray receiving device 5 and the second X-ray receiving device 7 (wherein the biplane positioning is conventional spatial position conversion, and the description is omitted in this example), so that the locking nails can be nailed into the locking nail holes 2 in an invisible state.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (5)
1. The intramedullary nail comprises an intramedullary nail rod, wherein the far end and the near end of the intramedullary nail rod are respectively provided with a locking nail hole, and the intramedullary nail is characterized in that the outer surface of the intramedullary nail rod is provided with at least three convex marking bodies which are not on the same straight line, and the marking bodies are used for positioning the space position of each locking nail hole.
2. The intramedullary nail of claim 1, wherein the marker is of the same or different material as the intramedullary nail.
3. The intramedullary nail of claim 1, wherein the marker is a square or spherical or triangular structure.
4. The intramedullary nail of claim 1, wherein the number of markers is three: the intramedullary nail locking device comprises a first marker, a second marker and a third marker, wherein the first marker is arranged at the center of the far end of the intramedullary nail rod, the second marker is arranged at the inner side of a first preset distance of a proximal locking hole of the intramedullary nail rod, and the third marker is arranged at the outer side of a second preset distance of the proximal locking hole of the intramedullary nail rod.
5. The intramedullary nail of claim 4, wherein the first predetermined distance and the second predetermined distance are at least 10mm or greater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921087633.5U CN210784626U (en) | 2019-07-10 | 2019-07-10 | Intramedullary nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921087633.5U CN210784626U (en) | 2019-07-10 | 2019-07-10 | Intramedullary nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210784626U true CN210784626U (en) | 2020-06-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921087633.5U Active CN210784626U (en) | 2019-07-10 | 2019-07-10 | Intramedullary nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210784626U (en) |
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2019
- 2019-07-10 CN CN201921087633.5U patent/CN210784626U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20211221 Address after: 201210 room 405-2, 4th floor, building 9, No. 1206, Zhangjiang Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee after: SHANGHAI TAOYING MEDICAL TECHNOLOGY CO.,LTD. Address before: 200240 No. 800, Dongchuan Road, Shanghai, Minhang District Patentee before: SHANGHAI JIAO TONG University |