CN219878256U - Flexible cancellous bone spherical cap-shaped guide pin - Google Patents
Flexible cancellous bone spherical cap-shaped guide pin Download PDFInfo
- Publication number
- CN219878256U CN219878256U CN202223243767.6U CN202223243767U CN219878256U CN 219878256 U CN219878256 U CN 219878256U CN 202223243767 U CN202223243767 U CN 202223243767U CN 219878256 U CN219878256 U CN 219878256U
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- CN
- China
- Prior art keywords
- cone
- guide pin
- cancellous bone
- spherical cap
- alloy
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 33
- 229910045601 alloy Inorganic materials 0.000 claims description 18
- 239000000956 alloy Substances 0.000 claims description 18
- 239000010935 stainless steel Substances 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000000741 silica gel Substances 0.000 claims description 8
- 229910002027 silica gel Inorganic materials 0.000 claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- 229910017709 Ni Co Inorganic materials 0.000 claims description 3
- 229910003267 Ni-Co Inorganic materials 0.000 claims description 3
- 229910003262 Ni‐Co Inorganic materials 0.000 claims description 3
- 229910018487 Ni—Cr Inorganic materials 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 229910000639 Spring steel Inorganic materials 0.000 claims 1
- 238000005266 casting Methods 0.000 claims 1
- 239000007769 metal material Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 8
- 230000001054 cortical effect Effects 0.000 description 6
- 230000001788 irregular Effects 0.000 description 4
- 210000004197 pelvis Anatomy 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 208000010392 Bone Fractures Diseases 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 210000003195 fascia Anatomy 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 210000001087 myotubule Anatomy 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 210000003049 pelvic bone Anatomy 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 210000000278 spinal cord Anatomy 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Prostheses (AREA)
Abstract
The utility model discloses a flexible cancellous bone spherical crown guide needle, which comprises a spherical crown, a cone and a rod body, wherein the spherical crown, the cone and the rod body are sequentially and fixedly connected, the spherical crown and the cone are cast into an integrated structure and are made of high-hardness metal materials, and the rod body is made of elastic metal materials.
Description
Technical Field
The utility model relates to the field of medical instruments, in particular to a flexible cancellous bone spherical cap-shaped guide needle.
Background
In the process of performing pelvic bone fracture hollow screw implantation or vertebroplasty, a patient needs to lie on the back or lie on a light-transmitting operation bed, after being reset, a incision is made at a corresponding position, fascia is cut in parallel, and muscle is passively separated according to the direction of muscle fiber; opening on a corresponding bone, inserting a cancellous bone spherical crown guide pin into cancellous bone penetrating through a fracture part, then, after perspective, confirming that the guide pin is in place, opening by using a hollow drilling line, placing a hollow screw along the guide pin, penetrating a puncture outfit into a vertebral body along the guide pin in vertebroplasty, and leading the guide pin to play roles of open circuit, guide and positioning;
however, the guide pin is a steel needle with certain strength, and is easy to collide with human tissues to cause damage to the pedicles of the bones or vertebral stenosis of pelvis irregular with larger bending rate, and the guide pin is too sharp in addition, the guide pin is easy to be inscribed out from cortical bones due to the fact that the guide pin is easy to be inscribed out, and other tissues or organs such as nerves, blood vessels and spinal cords can be damaged, so that the utility model provides a flexible cancellous bone spherical cap guide pin for solving the problems.
Disclosure of Invention
The present utility model provides a flexible cancellous bone spherical cap guide pin for solving the problems mentioned in the background above.
In order to solve the technical problems, the flexible cancellous bone spherical crown-shaped guide pin comprises a spherical crown, a cone and a rod body, wherein the spherical crown, the cone and the rod body are sequentially and fixedly connected, the spherical crown and the cone are cast into an integrated structure and are made of high-hardness metal, the raw material of the rod body is elastic metal and is welded and fixed with the cone, the rod body is of a spiral structural design, and the outer side of the rod body is wrapped with a silica gel sleeve.
Further, the narrow diameter end of the cone is gradually widened along the edge of the spherical crown, and the wide diameter end of the cone is flush with the outer wall of the rod body.
Further, the included angle between the inclined slope surface of the cone and the plane of the rod body is set between 30 degrees and 35 degrees.
Furthermore, the outer walls of the spherical crown and the cone are smooth surfaces, and the arithmetic average deviation value of the surface roughness profile is Ra1.6.
Further, the high-hardness metal is one of 316L stainless steel, 04Cr13Ni8Mo2Al stainless steel, 1Cr13 stainless steel, 3Cr13 stainless steel, magnesium alloy or aluminum alloy.
The elastic metal is one of 65Mn elastic steel, TC4, fe-Ni-Cr elastic alloy, ni-Ct elastic alloy, ni-Cr-Nb elastic alloy, ni-Co-Cr elastic alloy, nb-Ti elastic alloy and Fe-Ni-Co elastic alloy.
Compared with the related art, the flexible cancellous bone spherical cap guide pin provided by the utility model has the following beneficial effects: the utility model provides a flexible cancellous bone spherical crown-shaped guide needle, which adopts a spherical crown head, can prevent the guide needle from being cut out of cortical bone, has an included angle between a cone and a rod body plane of 30-35 degrees, adopts integrated molding, has no protuberance and smoothness, can reduce puncture resistance, ensures that the puncture process is smoother, adopts high-strength metal materials for the spherical crown head and the cone, can better guide an open circuit, and has an elastic structure when the rod body adopts elastic materials, is convenient for the guide needle to be deformed and bent in a micro way when inserted and extended in irregular bones of pelvis or vertebral pedicles with narrow vertebral bodies, can prevent the guide needle from penetrating out of cortical bone, has reasonable structure, is simple to manufacture and is convenient to operate and use.
Drawings
Fig. 1 is a schematic structural view of a cancellous bone spherical cap guide pin of the present utility model.
Fig. 2 is a cross-sectional view of the spherical crown end to a partial shaft body of the cancellous spherical crown guide pin of the present utility model.
Reference numerals in the drawings: 1. a spherical crown; 2. a cone; 3. a rod body.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model; all other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The embodiment is given by fig. 1 and 2, the flexible cancellous bone spherical cap guide pin comprises a spherical cap 1, a cone 2 and a rod body 3, wherein the spherical cap 1, the cone 2 and the rod body 3 are sequentially and fixedly connected, the narrow diameter end of the cone 2 is gradually widened along the edge of the spherical cap 1, the wide diameter end of the cone 2 is flush with the outer wall of the rod body 3, and the spherical cap 1 and the cone 2 are smooth to the outer surface of the rod body 3 and cannot damage tissues;
further, the spherical crown 1 and the cone 2 are cast into an integral structure and are made of high-hardness metal materials, wherein the high-hardness metal materials are specifically made of any one of 316L stainless steel, 04Cr13Ni8Mo2Al stainless steel, 1Cr13 stainless steel, 3Cr13 stainless steel, magnesium alloy or aluminum alloy, and the open-circuit guidance can be better achieved;
further, the included angle between the inclined slope surface of the cone 2 and the plane of the rod body 3 is set between 30 degrees and 35 degrees, so that the puncture resistance can be reduced, and the puncture process is smoother.
Furthermore, the outer walls of the spherical crown 1 and the cone 2 are smooth surfaces, the arithmetic average deviation value of the surface roughness profile is Ra1.6, and the smooth surfaces can reduce puncture resistance and reduce damage to human bodies.
Further, the rod body 3 is made of elastic metal materials, the rod body is welded and fixed with the cone 2, a convex structure is arranged on the end face of the cone 2 and can be clamped at the tail end of the spiral structure of the rod body 3, the welding area is increased, a round hole is formed in one side of the silica gel sleeve, which faces the convex structure, of the silica gel sleeve, the size of the round hole is smaller than that of the wide diameter end of the convex structure, the silica gel sleeve can be pressed, the sealing effect is good, medical adhesive can be filled in a gap, sealing is enhanced, the radius of the spiral structure of the rod body 3 is identical to that of the silica gel sleeve, and the silica gel sleeve can be fully expanded and is allowed to generate certain deformation.
Further, the rod body 3 is of a spiral structure design, and the outer side of the rod body 3 is wrapped with a silica gel sleeve, and the elastic metal is specifically any one of 65Mn elastic steel, TC4, fe-Ni-Cr elastic alloy, ni-Ct elastic alloy, ni-Cr-Nb elastic alloy, ni-Co-Cr elastic alloy, nb-Ti elastic alloy or Fe-Ni-Co elastic alloy, so that the rod body 3 can have deformability by means of the characteristics of material elasticity and self structure, and is convenient for generating micro deformation and bending when inserted and extended in irregular bones of pelvis or vertebral pedicles with narrow vertebral bodies, so as to prevent the penetration out of cortical bone and avoid accidental damage.
Working principle: when the device is used, the corresponding bones are firstly opened, then the spongy bone spherical crown guide needle is inserted into and penetrates through the spongy bone at the fracture part, in the puncturing process, the size of the cone 2 is gradually increased, no protuberance and smoothness are realized, the puncturing resistance can be reduced, the spherical crown 1 is blunt, the spherical crown cannot be cut out of the cortical bone, the rod body 3 has deformability, and the miniature deformation bending can be conveniently generated when the spherical crown guide needle is inserted and extended into irregular bones of pelvis or vertebral pedicles with narrow vertebral bodies, so that the spherical crown guide needle can be prevented from penetrating out of the cortical bone.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a flexible cancellous bone ball crown shape guide pin, includes spherical crown (1), cone (2) and body of rod (3), its characterized in that, spherical crown (1), cone (2) and body of rod (3) fixed connection in order, wherein, spherical crown (1), cone (2) casting are integrated into one piece structure, and are high hardness metal, the raw and other materials of body of rod (3) are elastic metal, and welded fastening between cone (2), body of rod (3) are heliciform structural design, and body of rod (3) outside parcel has the silica gel cover.
2. The flexible cancellous bone spherical cap guide pin according to claim 1, wherein the narrow diameter end of the cone (2) is gradually widened along the edge of the spherical cap (1), and the wide diameter end of the cone (2) is flush with the outer wall of the rod body (3).
3. A flexible cancellous bone spherical cap guide pin according to claim 1, characterized in that the angle between the inclined slope of the cone (2) and the plane of the shaft body (3) is set between 30 ° -35 °.
4. The flexible cancellous bone spherical cap guide pin according to claim 1, wherein the outer walls of the spherical cap (1) and the cone (2) are smooth surfaces, and the arithmetic average deviation value of the surface roughness profile is Ra1.6.
5. A flexible cancellous bone spherical cap guide pin according to claim 1, wherein, the high-hardness metal is one of 316L stainless steel, 04Cr13Ni8Mo2Al stainless steel, 1Cr13 stainless steel, 3Cr13 stainless steel, magnesium alloy or aluminum alloy.
6. The flexible cancellous bone spherical cap guide pin of claim 1 wherein the spring metal is one of 65Mn spring steel, TC4, fe-Ni-Cr spring alloy, ni-Ct spring alloy, ni-Cr-Nb spring alloy, ni-Co-Cr spring alloy, nb-Ti spring alloy, or Fe-Ni-Co spring alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223243767.6U CN219878256U (en) | 2022-12-05 | 2022-12-05 | Flexible cancellous bone spherical cap-shaped guide pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223243767.6U CN219878256U (en) | 2022-12-05 | 2022-12-05 | Flexible cancellous bone spherical cap-shaped guide pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219878256U true CN219878256U (en) | 2023-10-24 |
Family
ID=88396892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223243767.6U Active CN219878256U (en) | 2022-12-05 | 2022-12-05 | Flexible cancellous bone spherical cap-shaped guide pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219878256U (en) |
-
2022
- 2022-12-05 CN CN202223243767.6U patent/CN219878256U/en active Active
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