CN213606803U - Combined length-adjustable intramedullary needle - Google Patents
Combined length-adjustable intramedullary needle Download PDFInfo
- Publication number
- CN213606803U CN213606803U CN202022450967.3U CN202022450967U CN213606803U CN 213606803 U CN213606803 U CN 213606803U CN 202022450967 U CN202022450967 U CN 202022450967U CN 213606803 U CN213606803 U CN 213606803U
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- Prior art keywords
- intramedullary
- guide pin
- intramedullary needle
- needle bar
- rod
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- 241001079814 Symphyotrichum pilosum Species 0.000 claims description 16
- 235000004224 Typha angustifolia Nutrition 0.000 claims description 16
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000006378 damage Effects 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 2
- 210000000988 bone and bone Anatomy 0.000 description 13
- 208000010392 Bone Fractures Diseases 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 210000002303 tibia Anatomy 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 210000004233 talus Anatomy 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
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Abstract
The utility model relates to a modular length adjustable intramedullary needle, including length adjustable and inside hollow intramedullary needle bar and guide pin, the one end of guide pin stretches into the intramedullary needle bar via the one end of intramedullary needle bar in, and the intramedullary needle bar can be dismantled with the guide pin and be connected, its other end is adjusted in order to adjust its length to the intramedullary needle bar accessible, can dismantle with the one end of intramedullary needle bar after wearing out the one end of intramedullary canal and be connected, and guide the intramedullary needle bar and stretch into the intramedullary canal along the opposite direction of intramedullary canal is worn out with the guide pin, dismantle the separation and shift out the intramedullary canal with the other end of intramedullary needle bar to make the intramedullary needle bar accurately stretch into the intramedullary canal. The utility model discloses guaranteed the puncture success rate of intramedullary needle bar, avoided puncturing repeatedly to cause the painful of organism unnecessary damage and bring for the patient to through its length of adjustable intramedullary needle bar can be adjusted in a flexible way, can both use to different patients, easy operation has shortened the operation time greatly, has improved operation efficiency.
Description
Technical Field
The utility model relates to the technical field of orthopedic surgery instruments, in particular to a combined length-adjustable intramedullary needle.
Background
The bones are important components of the human body and play very important roles, such as the femur and the tibia, and once fracture occurs, normal walking of the human body is seriously affected. Generally, after fracture occurs, an intramedullary needle is generally adopted to fix two parts of the fracture part, so as to avoid secondary dislocation and injury. In the prior art, in order to insert an intramedullary needle into a medullary cavity and fix two sides of a fracture part, the intramedullary needle is not suitable for being inserted into the medullary cavity from the fracture part because the intramedullary needle needs to cross the fracture part after being inserted into the medullary cavity, and is usually inserted from one end of the medullary cavity. In addition, for patients of different physiques, because the sizes of bones are different, the existing intramedullary needle cannot well satisfy all patients, and if the intramedullary needles with different specifications are customized for different patients, the intramedullary needles are inconvenient and increase the cost.
Disclosure of Invention
The utility model aims to solve the technical problem that the intramedullary needle with adjustable combined length is provided aiming at the defects of the prior art.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a combined type length-adjustable intramedullary needle comprises an intramedullary needle rod and a guide needle, wherein the length of the intramedullary needle rod is adjustable, the inner part of the intramedullary needle rod is hollow, one end of the guide needle extends into the intramedullary needle rod through one end of the intramedullary needle rod, the intramedullary needle rod is detachably connected with the guide needle, the other end of the intramedullary needle rod can be adjusted to adjust the length of the intramedullary needle rod, one end of the guide needle penetrates out of one end of a medullary cavity and then is detachably connected with one end of the intramedullary needle rod, the intramedullary needle rod is guided to extend into the medullary cavity along the direction opposite to the direction of the guide needle penetrating out of the medullary cavity, the guide needle is detached from the other end of the intramedullary needle rod and is moved out of the medullary cavity, and the intramedullary needle rod can accurately extend into the medullary cavity.
The utility model has the advantages that: the utility model discloses a combination formula length adjustable intramedullary needle, through earlier wearing out the one end of pulp cavity with the guide pin to guide intramedullary needle bar from the reverse accurate pulp cavity of inserting of one end of pulp cavity, guaranteed the puncture success rate of intramedullary needle bar, avoid puncturing repeatedly and cause the painful of organism unnecessary damage and bring for the patient, and can adjust its length in a flexible way through adjustable intramedullary needle bar, can both use to the patient of difference, and easy operation has shortened operation time greatly, has improved operation efficiency.
On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:
further: the middle part of the outer side wall of the guide pin is provided with an external thread, the inner wall of a port at one end of the intramedullary needle rod is provided with an internal thread matched with the external thread, one end of the guide pin extends into the intramedullary needle rod through one end of the intramedullary needle rod, and the middle part of the guide pin is in threaded connection with one end of the intramedullary needle rod.
The beneficial effects of the further scheme are as follows: through be in the lateral wall middle part of guide pin is equipped with the external screw thread, and the one end port inner wall of intramedullary needle pole be equipped with external screw thread assorted internal thread, can be convenient the guide pin from the one end of pulp cavity wear out the back with the one end of intramedullary needle pole is connected to the accurate guidance intramedullary needle pole inserts the pulp cavity, has improved the success rate of intramedullary needle pole puncture greatly, has effectively reduced because blind the wearing and has leaded to the unnecessary misery that brings for the patient.
Further: the intramedullary pin rod comprises a hollow sleeve and a movable rod, wherein the hollow sleeve is arranged inside the intramedullary pin rod, the movable rod can freely move in the sleeve, the internal thread is arranged on the inner wall of one end of the sleeve, the inner wall of one end of the sleeve is located on the side, away from one end of the internal thread, of the movable rod, the abutting portion is arranged, one end of the movable rod can move to abut against the abutting portion, a tail cap is arranged at the other end of the movable rod, and when one end of the movable rod moves to abut against the abutting portion, the tail cap is located outside the sleeve.
The beneficial effects of the further scheme are as follows: through with the carriage release lever sets up but freely move in the sleeve, can conveniently adjust the length of whole intramedullary pin pole to nimble removal when carrying out intramedullary pin pole puncture to the patient of different physiques the carriage release lever satisfies different bone fixation demands, and is very convenient.
Further: and a friction layer is arranged on the outer wall of one end of the sleeve.
The beneficial effects of the further scheme are as follows: through setting up the frictional layer on the one end outer wall of sleeve pipe, can be after the intramedullary needle pole is inserted in the marrow chamber completely, the one end of sleeve pipe can be better with the skeleton combination, increase the frictional force between the one end of sleeve pipe and the skeleton, increase bonding strength, avoid driving when pulling back the carriage release lever one end of sleeve pipe and bone separation.
Further: the friction layer is a plurality of salient points which are uniformly arranged in an array.
The beneficial effects of the further scheme are as follows: through setting up a plurality of bumps, can increase the frictional force between the one end of sleeve pipe and the skeleton, avoid pulling back the movable rod or the follow-up recovered in-process of patient the one end of sleeve pipe separates with the skeleton, guarantees the fixed effect of intramedullary needle bar.
Further: the tail cap and the other end of the movable rod are integrally formed.
The beneficial effects of the further scheme are as follows: through will the tail cap with the other end integrated into one piece setting of carriage release lever makes whole intramedullary needle pole more pleasing to the eye on the one hand, and on the other hand avoids at the operation in-process the tail cap is followed the other end of carriage release lever drops, influences the puncture operation, improves the security of operation.
Further: the tail cap is hook-shaped.
The beneficial effects of the further scheme are as follows: the tail cap is arranged to be in a bent hook shape, so that the moving rod is communicated with the pipe sleeve and can be knocked into the medullary cavity through a tool, and the moving rod is combined with bones, and the convenience of operation is improved.
Further: the tail cap is a stud.
The beneficial effects of the further scheme are as follows: through setting the tail cap into the double-screw bolt, can conveniently pass through the carriage release lever drive the pipe box is rotatory and is twisted to combine together with the skeleton, improve the convenience of operation.
Further: the intramedullary pin rod further comprises a plurality of locating pieces matched with the inner wall of the sleeve, the locating pieces are evenly arranged in the sleeve at intervals, through holes matched with the moving rod are formed in the locating pieces, and the moving rod sequentially penetrates through the through holes in the locating pieces and can normally move in the sleeve.
The beneficial effects of the further scheme are as follows: through setting up the spacer can be right the carriage release lever carries out axial fixity, guarantees the carriage release lever is along the pipe box can remain stable when carrying out axial displacement, avoids appearing the ectopic fixed effect that influences in the axial.
Further: the guide pin is a solid rod body, and one end of the guide pin is in a pointed end shape.
The beneficial effects of the further scheme are as follows: through with the guide pin sets up to solid body of rod, can guarantee that it has sufficient structural strength, through with the one end of guide pin sets up to sharp-pointed form, can make it sharper, passes the one end in pulp cavity smoothly, improves the efficiency and the security of operation.
Drawings
Fig. 1 is an exploded view of a combined length-adjustable intramedullary pin according to an embodiment of the present invention;
fig. 2 is a schematic view of a combined structure of a combined intramedullary pin with adjustable length according to an embodiment of the present invention;
FIG. 3 is a schematic view of an inner needle stem according to another embodiment of the present invention;
fig. 4 is a schematic structural view of an inner needle rod according to another embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. intramedullary needle rod, 2, guide pin, 3, sleeve pipe, 4, carriage release lever, 5, butt portion, 6, tail cap, 7, locating plate.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1 and 2, a combined length-adjustable intramedullary needle comprises a length-adjustable intramedullary needle rod 1 and a guide pin 2, wherein the intramedullary needle rod 1 and the guide pin 2 are hollow inside, one end of the guide pin 2 extends into the intramedullary needle rod 1 through one end of the intramedullary needle rod 1, the intramedullary needle rod 1 is detachably connected with the guide pin 2, the intramedullary needle rod 1 can adjust the length thereof by adjusting the other end thereof, one end of the guide pin 2 penetrates out of one end of a medullary cavity and then is detachably connected with one end of the intramedullary needle rod 1, the intramedullary needle rod 1 is guided to extend into the medullary cavity along the direction opposite to the direction of the guide pin 2 penetrating out of the medullary cavity, and the guide pin 2 is detached from and separated from the medullary cavity with the other end of the intramedullary needle rod 1, so that the intramedullary needle rod 1 accurately extends into the medullary cavity.
The utility model discloses a combination formula length adjustable intramedullary needle, through earlier wearing out the one end of pulp cavity with guide pin 2, and guide intramedullary needle bar 1 and from the reverse accurate pulp cavity that inserts of one end of pulp cavity, guaranteed intramedullary needle bar 1's puncture success rate, avoid puncturing repeatedly and cause the painful of organism unnecessary damage and bring for the patient, and can adjust its length in a flexible way through intramedullary needle bar 1 with adjustable, can both use to the patient of difference, and easy operation has shortened operation time greatly, and the efficiency of performing the operation is improved.
In one or more embodiments of the present invention, the middle portion of the outer sidewall of the guide pin 2 is provided with an external thread, the inner wall of the port at one end of the intramedullary nail rod 1 is provided with an internal thread matched with the external thread, the one end of the guide pin 2 is inserted into the one end of the intramedullary nail rod 1 in the intramedullary nail rod 1, and the middle portion of the guide pin 2 is connected with the one end thread of the intramedullary nail rod 1. Through be in the lateral wall middle part of guide pin 2 is equipped with the external screw thread, and the one end port inner wall of intramedullary needle pole 1 be equipped with external screw thread assorted internal thread, can be convenient guide pin 2 wear out from the one end of pulp cavity back with intramedullary needle pole 1's one end is connected to accurate guide intramedullary needle pole 1 inserts in the pulp cavity, improved the success rate of intramedullary needle pole 1 puncture greatly, effectively reduced because blind the wearing and lead to unnecessary misery that brings for the patient.
In one or more embodiments of the present invention, the intramedullary needle rod 1 includes a hollow sleeve 3 and a movable rod 4 disposed in the sleeve 3 and capable of moving freely, the internal thread is disposed on an inner wall of one end of the sleeve 3, and the inner wall of one end of the sleeve 3 is disposed on a side of the internal thread away from one end of the movable rod 4, the movable rod 4 has one end movable to the abutting portion 5, the other end of the movable rod 4 is disposed with a tail cap 6, and when the movable rod 4 has one end movable to the abutting portion 5, the tail cap 6 is disposed outside the sleeve 3. The movable rod 4 is arranged in the sleeve 3 and can move freely, so that the length of the whole intramedullary needle rod 1 can be adjusted conveniently, the movable rod 4 can be flexibly moved when the intramedullary needle rod 1 is punctured for patients with different physiques, different bone fixing requirements are met, and the intramedullary needle is very convenient to use. In practice, the moving rod 4 is a solid rod body.
The embodiment of the utility model provides an in, the other end terminal surface of carriage release lever 4 can be equipped with the recess, and this aspect is convenient tail cap 6 with carriage release lever 4's the other end is connected, for example sets up the screw thread at the recess inside wall, then sets up rather than assorted screw thread in tail cap 6's one end, like this tail cap 6 can more convenient with carriage release lever 4's the other end is connected, is dismantled.
Preferably, in one or more embodiments of the present invention, a friction layer (not shown) is disposed on an outer wall of one end of the sleeve 3. By arranging the friction layer on the outer wall of one end of the sleeve 3, after the intramedullary needle rod 1 is completely inserted into the medullary cavity, one end of the sleeve 3 can be better combined with the bone, the friction force between one end of the sleeve 3 and the bone is increased, the combination strength is increased, and the situation that one end of the sleeve 3 is driven to be separated from the bone when the moving rod 4 is pulled back is avoided.
More preferably, in one or more embodiments of the present invention, the rubbing layer is a plurality of bumps uniformly arranged in an array. Through setting up a plurality of bumps, can increase the frictional force between the one end of sleeve pipe 3 and the skeleton, avoid pulling back the movable rod 4 or the follow-up recovered in-process of patient the one end of sleeve pipe 3 separates with the skeleton, guarantees the fixed effect of intramedullary needle pole 1.
In practice, the friction layer may also be in other forms, such as a raised pattern, a thread (with a length ranging from 0.5 to 0.8), etc., which are not listed here, and all these forms are within the scope of the present invention.
Preferably, in one or more embodiments of the present invention, the tail cap 6 is integrally formed with the other end of the moving rod 4. Through with tail cap 6 with the other end integrated into one piece setting of carriage release lever 4 makes whole intramedullary needle pole 1 more pleasing to the eye on the one hand, and on the other hand avoids at the operation in-process tail cap 6 is followed the other end of carriage release lever 4 drops, influences the puncture operation, improves the security of operation.
As shown in fig. 3, in one or more embodiments of the present invention, the tail cap 6 is optionally hook-shaped. The tail cap is arranged to be in a bent hook shape, so that the moving rod 4 is communicated with the pipe sleeve 3 and can be conveniently knocked into a medullary cavity through a tool and combined with bones, and the operation convenience is improved.
As shown in fig. 4, in one or more embodiments of the present invention, optionally, the tail cap 6 is a stud, and a surface of the stud is provided with a thread to increase friction force for easy operation. The tail cap is a stud, so that the pipe sleeve 3 can be driven to rotate and be screwed conveniently through the moving rod 4 so as to be combined with a bone, and the operation convenience is improved.
Preferably, in one or more embodiments of the present invention, the intramedullary rod 1 further includes a plurality of spacers 7 matching with the inner wall of the sleeve 3, a plurality of spacers 7 are evenly spaced in the sleeve 3, a through hole matching with the moving rod 4 is provided on the spacer 7, and the moving rod 4 sequentially passes through the through hole on the spacer 7 and can move normally in the sleeve 3. Through setting up the spacer 7 can be right the carriage release lever 4 carries out axial fixity, guarantees the carriage release lever 4 is along can remain stable when pipe box 3 carries out axial displacement, avoids appearing the ectopic fixed effect that influences in the axial. In practice, the positioning pieces 7 are circular, and the number of the positioning pieces 7 can be flexibly adjusted according to the length of the sleeve 3.
In one or more embodiments of the present invention, the guide pin 2 is a solid rod body, and one end of the guide pin 2 is a tip shape. Through with guide pin 2 sets up to solid body of rod, can guarantee that it has sufficient structural strength, through with guide pin 2's one end sets up to sharp-pointed form, can make it sharper, passes the one end in pulp cavity smoothly, improves the efficiency and the security of operation.
Take the shin bone fracture as an example, the utility model discloses a combined type length-adjustable intramedullary pin's operation process specifically does: firstly, one end (lower end) of a guide pin 2 is inserted into a medullary cavity of a tibia downwards from a fracture part and penetrates out of one end (lower end) of the medullary cavity of the tibia, penetrates out of a sole after penetrating through a talus and a root bone, then the penetrated end (lower end) of the guide pin 2 is firmly connected with one end (upper end) of a sleeve 3 in a threaded manner, then a tail cap 6 (knocked in or screwed in by adopting a tool) at the tail end (lower end) of a moving rod 4 is pushed upwards and backwards, so that the moving rod 4 drives the sleeve 3 to be communicated with the guide pin 2 and is inserted into the medullary cavity upwards and reversely, when the other end (upper end) of the guide pin 2 moves to the fracture part, the other end (upper end) of the guide pin 2 is taken out of the medullary cavity, the guide pin 2 is rotated to separate the guide pin 2 from one end (upper end) of the sleeve 3, then the tail cap 6 at the tail end (lower end) of the moving rod 4 is continuously pushed backwards, the length of the whole intramedullary needle rod 2 is adjusted until one end (upper end) of the sleeve 3 is completely inserted into the medullary cavity and combined with the skeleton at the other end (upper end) of the medullary cavity, and the tail cap 6 is positioned in the root bone, thus the complete fracture part can be fixed.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a modular length adjustable intramedullary needle which characterized in that: the intramedullary nail rod comprises an intramedullary nail rod (1) and a guide pin (2), wherein the length of the intramedullary nail rod (1) is adjustable, the inner part of the intramedullary nail rod is hollow, one end of the guide pin (2) extends into the intramedullary nail rod (1), the intramedullary nail rod (1) is detachably connected with the guide pin (2), the length of the intramedullary nail rod (1) can be adjusted by adjusting the other end of the intramedullary nail rod, one end of the guide pin (2) penetrates out of one end of a medullary cavity and then is detachably connected with one end of the intramedullary nail rod (1), the intramedullary nail rod (1) is guided to extend into the medullary cavity along the direction opposite to the direction of the guide pin (2) penetrating out of the medullary cavity, and the guide pin (2) and the other end of the intramedullary nail rod (1) are detached, separated and moved out of the medullary cavity, so that the intramedullary nail rod (1) can accurately extend into the medullary cavity.
2. The modular length adjustable intramedullary needle of claim 1, wherein: the utility model discloses a needle guide device, including guide pin (2), the lateral wall middle part of guide pin (2) is equipped with the external screw thread, the one end port inner wall of marrow inner needle bar (1) be equipped with external screw thread assorted internal thread, the one end of guide pin (2) via the one end of marrow inner needle bar (1) stretches into in marrow inner needle bar (1), just the middle part of guide pin (2) with the one end threaded connection of marrow inner needle bar (1).
3. The modular length adjustable intramedullary needle of claim 2, wherein: intramedullary needle bar (1) is in including inside hollow sleeve pipe (3) and setting in but sleeve pipe (3) one end inner wall of sleeve pipe (3) is gone up, just the one end inner wall of sleeve pipe (3) is located one side that its one end was kept away from to the internal thread is equipped with butt portion (5), the one end of moving rod (4) can move to with butt portion (5) butt, the other end of moving rod (4) is equipped with tail cap (6), and works as the one end of moving rod (4) move to with during butt portion (5) butt, tail cap (6) are located the outside of sleeve pipe (3).
4. The modular length adjustable intramedullary needle of claim 3, wherein: and a friction layer is arranged on the outer wall of one end of the sleeve (3).
5. The modular length adjustable intramedullary needle of claim 4, wherein: the friction layer is a plurality of salient points which are uniformly arranged in an array.
6. The modular length adjustable intramedullary needle of claim 3, wherein: the tail cap (6) and the other end of the movable rod (4) are integrally formed.
7. The modular length adjustable intramedullary needle of claim 6, wherein: the tail cap (6) is in a hook shape.
8. The modular length adjustable intramedullary needle of claim 6, wherein: the tail cap (6) is a stud.
9. The modular length adjustable intramedullary needle of claim 3, wherein: intramedullary needle bar (1) still include a plurality of with inner wall assorted spacer (7) of sleeve pipe (3), it is a plurality of spacer (7) even interval sets up in sleeve pipe (3), be equipped with on spacer (7) with carriage release lever (4) assorted through-hole, carriage release lever (4) pass in proper order through-hole on spacer (7), and can normally move in sleeve pipe (3).
10. A modular length adjustable intramedullary needle according to any one of claims 1 to 9, wherein: the guide pin (2) is a solid rod body, and one end of the guide pin (2) is in a tip shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022450967.3U CN213606803U (en) | 2020-10-29 | 2020-10-29 | Combined length-adjustable intramedullary needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022450967.3U CN213606803U (en) | 2020-10-29 | 2020-10-29 | Combined length-adjustable intramedullary needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213606803U true CN213606803U (en) | 2021-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022450967.3U Expired - Fee Related CN213606803U (en) | 2020-10-29 | 2020-10-29 | Combined length-adjustable intramedullary needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213606803U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113974809A (en) * | 2021-12-15 | 2022-01-28 | 河北医科大学第三医院 | Tibia intramedullary nail |
-
2020
- 2020-10-29 CN CN202022450967.3U patent/CN213606803U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113974809A (en) * | 2021-12-15 | 2022-01-28 | 河北医科大学第三医院 | Tibia intramedullary nail |
| CN113974809B (en) * | 2021-12-15 | 2023-07-18 | 河北医科大学第三医院 | Tibia intramedullary nail |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210706 |