CN202537637U - Intramedullary needle - Google Patents
Intramedullary needle Download PDFInfo
- Publication number
- CN202537637U CN202537637U CN2012202272168U CN201220227216U CN202537637U CN 202537637 U CN202537637 U CN 202537637U CN 2012202272168 U CN2012202272168 U CN 2012202272168U CN 201220227216 U CN201220227216 U CN 201220227216U CN 202537637 U CN202537637 U CN 202537637U
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- needle
- plane
- needle body
- intramedullary
- utility
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Abstract
The utility model relates to the field of medical apparatus and instruments, and in particular to an intramedullary needle which can change the trend of a needle inside an intramedullary cavity. The intramedullary needle comprises a needle body which is a circular cylinder and a needle head which is a pyramis and extends outwards from one end of the needle body. The projection of a needle tip of the needle head on the radial direction section of the needle body is located within the radial direction section, and is located outside the center of the radial direction section.
Description
Technical field
This utility model relates to medical instruments field, is specifically related to a kind of intramedullary needle.
Background technology
In medical treatment, be used at present often adopting Kirschner wire aspect the understressed fracture fixation.Kirschner wire passes bone through needle point and in bone, moves, and fixes in the place of fracture.
Because the needle point of existing Kirschner wire is in the central axis of shank, as shown in Figure 3, needle point 6 is positioned on the central shaft of needle body 7, and when original place rotation needle body 7, the position of needle point 6 does not change, so can not change the trend of needle point through rotation needle body 7.When moving in the bending section of Kirschner wire at bone, needle point gets into can only be along linear running in the pulp cavity, the easy like this offside cortical bone that penetrates, increase patient's misery.
The utility model content
This utility model provides a kind of intramedullary needle, can in pulp cavity, change the trend of pin.
This utility model provides a kind of intramedullary needle, comprising:
Needle body, it is a cylinder;
Syringe needle, it is a cone, stretches out from an end of said needle body, the needle point of said syringe needle is being projected within the said radial section on the radial section of said needle body, and outside the center of said radial section.
In each embodiment of this utility model, preferably, the distance of said needle point between the center of projection on the said radial section and said radial section is the radius of 1/4 to 1 times said radial section.
In each embodiment of this utility model, preferably, the bottom surface of said syringe needle and the contact surface of said needle body are fully overlapping or overlap.
In each embodiment of this utility model, preferably, the cone of said syringe needle has four sides, and one of them side is a curved surface, and said curved surface stretches out from the parallel sided ground of said needle body.
In each embodiment of this utility model, preferably, other three sides in said four sides are the plane, comprising: first inclined-plane, second inclined-plane and the 3rd inclined-plane, said first inclined-plane is relative with said curved surface.
In each embodiment of this utility model, preferably, the lengthwise on said second inclined-plane and said the 3rd inclined-plane is 8-12mm, and the lengthwise on said first inclined-plane is 4-5mm.
In each embodiment of this utility model, preferably, the lengthwise on said second inclined-plane and said the 3rd inclined-plane is 9-10mm, and the lengthwise on said first inclined-plane is 4.2-4.5mm.
In each embodiment of this utility model, preferably, the side of said needle body has screw thread.
In each embodiment of this utility model, preferably, the side of said needle body has scale.
In each embodiment of this utility model, preferably, the tail end of said needle body is provided with limiting component.
Intramedullary needle through each embodiment of this utility model provides, can bring following beneficial effect:
Through needle point is arranged in the radial section of needle body, and outside the center of the radial section of needle body, is about to needle point and is set to eccentric part, can make to change the trend of needle point through the rotation needle body when intramedullary needle moves in pulp cavity;
Curved surface through syringe needle is set to the shape that the side with needle body seamlessly transits, and is convenient to simplify technology, is easy to make; And because slick and sly plane is more slick and sly with respect to the plane that Pedicellus et Pericarpium Trapae is arranged, can reduce the damage of intramedullary needle, reduce the misery of user, can also reach after intramedullary needle gets into pulp cavity and more easily slide along the offside cortical bone to user;
Side through at needle body is provided with screw thread, can needle body and other fixture be fixed, and plays the effect that prevents that intramedullary needle from moving;
Side through at needle body is provided with scale, can when inserting needle, grasp the needling length of needle body, reduces owing to there not being scale to get into the long misery that causes in the body;
Tail end through at needle body is provided with limiting component, and after needle body was inserted correct position, about 2-3mm cut off Kirschner wire in the place outside limiting component, the tail end of cutting off the back needle body can bury with the user body in, can prevent that like this Kirschner wire from moving in bone along needle body.
Description of drawings
In order to be illustrated more clearly in this utility model embodiment or technical scheme of the prior art; Below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art; Obviously, the accompanying drawing in below describing only is some embodiment of this utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other embodiment and accompanying drawing thereof according to these accompanying drawing illustrated embodiments.
Fig. 1 is the front view of this utility model intramedullary needle embodiment;
Fig. 2 is the side view of this utility model intramedullary needle embodiment;
Fig. 3 is the structural representation of existing Kirschner wire.
The specific embodiment
Below will combine accompanying drawing that the technical scheme of each embodiment of this utility model is carried out clear, complete description, obviously, described embodiment only is a part of embodiment of this utility model, rather than whole embodiment.Based on the embodiment in this utility model, those of ordinary skills are resulting all other embodiment under the prerequisite of not making creative work, all belong to the scope that this utility model is protected.
This utility model provides a kind of intramedullary needle, comprising:
Needle body, it is a cylinder;
Syringe needle, it is a cone, stretches out from an end of said needle body, the needle point of said syringe needle is being projected within the said radial section on the radial section of said needle body, and outside the center of said radial section.The center that should be understood that the radial section of said needle body is the centre of form.
Should be understood that because needle body is a cylinder so the radial section of needle body is circular, then the center of radial section is the circular center of circle.
The needle point of existing Kirschner wire is in the central axis of needle body, and when original place rotation needle body, the position of needle point does not change.As shown in Figure 3, needle point 6 is positioned on the central shaft of needle body 7, and when original place rotation needle body 7, the position of needle point 6 does not change, so can not change the trend of needle point through rotation needle body 7.
When in Kirschner wire need the bending section at bone, moving, needle point gets into can only be along linear running in the pulp cavity of bone, and the easy like this offside cortical bone that penetrates increases patient's misery.
Said intramedullary needle, when original place rotation needle body, the position of needle point changes, and then has changed the running route of needle point.For example, when running into crooked bone because the trend that need change needle point at knee can be rotated needle body to adapt to bending section, the direction of adjustment needle point, make needle point can be smoothly bending section through bone.
Said needle body has radial section, because said needle body is a cylinder, then with the needle body horizontal positioned, cylindrical central axis direction is a horizontal direction, and the radial section of needle body is a circular cross-section.
In each embodiment of this utility model, preferably, the distance of said needle point between the center of projection on the said radial section and said radial section is the radius of 1/4 to 1 times said radial section.Should be understood that said radial section is a circular cross-section, the projection of the needle point of said intramedullary needle on radial circular cross-section can not overlap with the center of circular cross-section, can reach eccentric effect.Draw through a large amount of experiments, when the distance between the center of projection and the radial section of needle point on radial section was 1/4r-r, effect was preferable.Wherein when the distance between the center of projection and the radial section of needle point on radial section was r, technology was comparatively easy, can seamlessly transit for syringe needle and needle body, was made into integration.Wherein, r is the radius of the circular radial tee section of needle body.
In each embodiment of this utility model, preferably, the bottom surface of said syringe needle and the contact surface of said needle body are fully overlapping or overlap.According to concrete technology, can select the contact surface of bottom surface and said needle body of syringe needle overlapping wholly or in part.The contact surface of said needle body is the face that said needle body is connected with said syringe needle.
In each embodiment of this utility model, preferably, the cone of said syringe needle has four sides, and one of them side is a curved surface, and said curved surface stretches out from the parallel sided ground of said needle body.Said syringe needle can be set to said curved surface edge and extend with the direction that axially parallels of said needle body, and overlaps with the side of said needle body.Adopt this shape can simplify processing technology, be made into integration.
In each embodiment of this utility model, preferably, other three sides in said four sides are the plane, comprising: first inclined-plane, second inclined-plane and the 3rd inclined-plane, said first inclined-plane is relative with said curved surface.
In one embodiment; Syringe needle is a cone, and cone comprises polygonal bottom surface, first inclined-plane, second inclined-plane, the 3rd inclined-plane and the 4th arcwall face, and the bottom surface of cone is connected with an end of needle body; First inclined-plane is relative with the 4th arcwall face; Second inclined-plane and the 3rd inclined-plane intersect with first inclined-plane and the 4th arcwall face simultaneously, and extend with the direction of the axially parallel of needle body on the 4th arcwall face edge, and overlap with the side of needle body.Four sides of cone pool unique a bit, this point is needle point.
In each embodiment of this utility model, preferably, the lengthwise on said second inclined-plane and said the 3rd inclined-plane is 8-12mm, and the lengthwise on said first inclined-plane is 4-5mm.Should be understood that said second inclined-plane can be identical with the lengthwise on the 3rd inclined-plane.The lengthwise on said second inclined-plane and the 3rd inclined-plane can be 8mm, 8.5mm, 9mm, 10mm, 11mm, 12mm etc.Should be understood that said first inclined-plane can be 4.1mm, 4.2mm, 4,5mm, 4.8mm, 5mm etc. along the length of the axial direction of said needle body.Wherein, mm is a millimeter, in full together.
In each embodiment of this utility model, preferably, the lengthwise on said second inclined-plane and said the 3rd inclined-plane is 9-10mm, and the lengthwise on said first inclined-plane is 4.2-4.5mm.According to concrete technology, can take the size in the above-mentioned scope.
In each embodiment of this utility model, preferably, the side of said needle body has screw thread.Side through at needle body is provided with screw thread, can needle body and other fixture be fixed, and plays the effect that prevents that intramedullary needle from moving.The bearing of trend that should be understood that said screw thread can extend along the length direction of said needle body.
In each embodiment of this utility model, preferably, the side of said needle body has scale.Side through at needle body is provided with scale, can when inserting needle, grasp needle body and get into the length in the bone, thereby reduce owing to there not being scale to get into misery long in the bone.
In each embodiment of this utility model, preferably, the tail end of said needle body is provided with limiting component.Tail end through at needle body is provided with limiting component, and after needle body was placed on the appropriate location, about 2-3mm cut off Kirschner wire in the place outside limiting component, the tail end of cutting off the back needle body can bury with the user body in, can prevent that like this Kirschner wire from moving in bone.Preferably, said limiting component comprises spacing ring.
This utility model can adopt medical titanium alloy or medical stainless steel to process when making.
In one embodiment, as shown in Figure 1, intramedullary needle comprises first inclined-plane 1, second inclined-plane 2, the 3rd inclined-plane 3 and cylinder needle body 5.Fig. 2 is the side view of Fig. 1, comprises the 3rd inclined-plane 3, curved surface 4 and cylinder needle body 5.
Intramedullary needle comprises needle body 5 and syringe needle, and the joint face that needle body 5 is connected with syringe needle is the rounded face of needle body 5 right-hand members among Fig. 1 and Fig. 2.Curved surface 4 overlaps with the arcuate flanks of needle body 5 along the axial direction extension of needle body 5, can find out that in Fig. 2 the arcuate flanks of needle point and needle body 5 is an one, and needle point is positioned on the edge of radial section in needle body 5 radial projections.Second inclined-plane 2 is identical with the lengthwise on the 3rd inclined-plane 3.First inclined-plane 1 is relative with the 4th arcwall face 4, is connected with the 3rd inclined-plane 3 through second inclined-plane 2.Complex chart 1 can find out with Fig. 2, and first inclined-plane 1, second inclined-plane 2, the 3rd inclined-plane 3 and curved surface 4 converge and be a bit, and that converges a bit is needle point.
Intramedullary needle through each embodiment of this utility model provides, can bring following beneficial effect:
Through needle point is arranged in the radial section of needle body, and outside the center of the radial section of needle body, is about to needle point and is set to eccentric part, can make to change the trend of needle point through the rotation needle body when intramedullary needle moves in pulp cavity;
Curved surface through syringe needle is set to the shape that the side with needle body seamlessly transits, and is convenient to simplify technology, is easy to make; And because slick and sly plane is more slick and sly with respect to the plane that Pedicellus et Pericarpium Trapae is arranged, can reduce the damage of intramedullary needle, reduce the misery of user, can also reach after intramedullary needle gets into pulp cavity and more easily slide along the offside cortical bone to user;
Side through at needle body is provided with screw thread, can needle body and other fixture be fixed, and plays the effect that prevents that intramedullary needle from moving;
Side through at needle body is provided with scale, can when inserting needle, grasp through the scale of observing on the needle body, thereby reduce owing to there not being scale to get into the long misery that causes in the body;
Tail end through at needle body is provided with limiting component, and after needle body was inserted correct position, about 2-3mm cut off Kirschner wire in the place outside limiting component, the tail end of cutting off the back needle body can bury with the user body in, can prevent that like this Kirschner wire from moving in bone along needle body.
The various embodiment that this utility model provides can make up with any-mode as required each other, and the technical scheme that obtains through this combination is also in the scope of this utility model.
Obviously, those skilled in the art can carry out various changes and modification to this utility model and not break away from the spirit and the scope of this utility model.Like this, belong within the scope of this utility model claim and equivalent technologies thereof if these of this utility model are revised with modification, then this utility model also comprises these changes and modification interior.
Claims (10)
1. an intramedullary needle is characterized in that, comprising:
Needle body, it is a cylinder;
Syringe needle, it is a cone, stretches out from an end of said needle body, the needle point of said syringe needle is being projected within the said radial section on the radial section of said needle body, and outside the center of said radial section.
2. intramedullary needle as claimed in claim 1 is characterized in that, the distance of said needle point between the center of projection on the said radial section and said radial section is the radius of 1/4 to 1 times said radial section.
3. intramedullary needle as claimed in claim 1 is characterized in that, the bottom surface of said syringe needle and the contact surface of said needle body are fully overlapping or overlap.
4. intramedullary needle as claimed in claim 1 is characterized in that, the cone of said syringe needle has four sides, and one of them side is a curved surface, and said curved surface stretches out from the parallel sided ground of said needle body.
5. intramedullary needle as claimed in claim 4 is characterized in that, other three sides in said four sides are the plane, comprising: first inclined-plane, second inclined-plane and the 3rd inclined-plane, said first inclined-plane is relative with said curved surface.
6. intramedullary needle as claimed in claim 5 is characterized in that, the lengthwise on said second inclined-plane and said the 3rd inclined-plane is 8-12mm, and the lengthwise on said first inclined-plane is 4-5mm.
7. intramedullary needle as claimed in claim 6 is characterized in that, the lengthwise on said second inclined-plane and said the 3rd inclined-plane is 9-10mm, and the lengthwise on said first inclined-plane is 4.2-4.5mm.
8. like each described intramedullary needle among the claim 1-7, it is characterized in that the side of said needle body has screw thread.
9. like each described intramedullary needle among the claim 1-7, it is characterized in that the side of said needle body has scale.
10. like each described intramedullary needle among the claim 1-7, it is characterized in that the tail end of said needle body is provided with limiting component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202272168U CN202537637U (en) | 2012-05-18 | 2012-05-18 | Intramedullary needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202272168U CN202537637U (en) | 2012-05-18 | 2012-05-18 | Intramedullary needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202537637U true CN202537637U (en) | 2012-11-21 |
Family
ID=47158336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202272168U Expired - Fee Related CN202537637U (en) | 2012-05-18 | 2012-05-18 | Intramedullary needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202537637U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105455873A (en) * | 2015-12-21 | 2016-04-06 | 武汉康斯泰德科技有限公司 | Spacing fixing type metal bone spicule |
-
2012
- 2012-05-18 CN CN2012202272168U patent/CN202537637U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105455873A (en) * | 2015-12-21 | 2016-04-06 | 武汉康斯泰德科技有限公司 | Spacing fixing type metal bone spicule |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20190518 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |