CN113558743A - Adjustable aiming arm for intramedullary nail - Google Patents
Adjustable aiming arm for intramedullary nail Download PDFInfo
- Publication number
- CN113558743A CN113558743A CN202110908864.3A CN202110908864A CN113558743A CN 113558743 A CN113558743 A CN 113558743A CN 202110908864 A CN202110908864 A CN 202110908864A CN 113558743 A CN113558743 A CN 113558743A
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- aiming arm
- intramedullary nail
- connecting rod
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- threaded
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- 230000003068 static effect Effects 0.000 claims abstract description 21
- 230000006978 adaptation Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 abstract description 3
- 238000002594 fluoroscopy Methods 0.000 abstract description 3
- 210000000689 upper leg Anatomy 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000000338 in vitro Methods 0.000 description 2
- HBUBKKRHXORPQB-UHFFFAOYSA-N 2-(6-amino-2-fluoropurin-9-yl)-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound C1=NC=2C(N)=NC(F)=NC=2N1C1OC(CO)C(O)C1O HBUBKKRHXORPQB-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 210000004262 dental pulp cavity Anatomy 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
Abstract
The present invention provides an adjustable aiming arm for an intramedullary nail, comprising: the connecting rod is used for being fixed on the handle of the intramedullary nail; the distal aiming arm is used for controlling the distal end of the intramedullary nail to carry out static locking or dynamic locking; the two ends of the adjusting component are respectively connected with the connecting rod and the far-end aiming arm, and the relative angle and the length of the connecting rod and the far-end aiming arm can be adjusted by controlling the adjusting component; and the screwing nut is used for fixing the far-end aiming arm and the connecting rod after the position is adjusted. The advantages are that: enabling the distal aiming arm to be concentric with the distal locking hole of the intramedullary nail so as to penetrate through the distal locking hole of the intramedullary nail to reach the cortex on the opposite side of the femur during distal interlocking drilling, and ensuring that the intramedullary nail locking hole is finally screwed in after a screw is screwed in; in addition, the technical defects that the curvature of the intramedullary nail and the curvature of the femoral medullary cavity are not matched in the prior art, so that the distal lockhole deviates after the intramedullary nail deforms, the operation time is prolonged, the C-arm fluoroscopy times are increased, and the ray is harmful to the human body are overcome.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an adjustable aiming arm for an intramedullary nail.
Background
The existing distal aiming support can only aim when an intramedullary nail is not implanted into a human body, namely, the distal aiming support can aim when in vitro calibration, after the intramedullary nail is implanted into a femoral medullary cavity in an operation, if the curvature of the intramedullary nail is not fit with the curvature of the femoral medullary cavity, the distal end of the intramedullary nail deforms, and a distal locking hole deviates, so that after the distal aiming support is installed, a guide hole at the distal end of the support is staggered with a main nail distal locking hole, although the intramedullary nail and the distal aiming support need to be installed and calibrated in vitro before the operation, the deformation of the intramedullary nail in the operation cannot be adjusted, so that the intramedullary nail distal locking hole cannot be penetrated in a drilling process, and finally, a screwed screw is also staggered with the locking hole to cause the condition of locking failure, and the effect of distal locking cannot be achieved.
Disclosure of Invention
The invention provides an adjustable aiming arm for an intramedullary nail, which aims to overcome at least one technical defect, reduce operation time and C-arm fluoroscopy times and reduce ray damage to a body.
In order to achieve the above purpose, the invention provides the following technical scheme:
an adjustable aiming arm for an intramedullary nail, comprising:
the connecting rod is used for being fixed on the handle of the intramedullary nail;
the distal aiming arm is used for controlling the distal end of the intramedullary nail to carry out static locking or dynamic locking;
the two ends of the adjusting component are respectively connected with the connecting rod and the far-end aiming arm, and the relative angle and the length of the connecting rod and the far-end aiming arm can be adjusted by controlling the adjusting component;
and the screwing nut is used for fixing the far-end aiming arm and the connecting rod after the position is adjusted.
Preferably, the middle part of the connecting rod is symmetrically provided with two first connecting holes along the width direction of the connecting rod, and the top surface of one end of the connecting rod is provided with a threaded positioning column;
the first connecting hole is used for being connected with one end of the adjusting assembly, and the threaded positioning column is used for penetrating through the far-end aiming arm and is in threaded fixation with the screwing nut.
Furthermore, two bearing blocks are arranged in the middle of the connecting rod towards one side provided with the threaded positioning column, and the two bearing blocks are arranged in a splayed structure along the width direction of the connecting rod;
the two first connecting holes are symmetrically formed in the two bearing blocks.
Furthermore, two handle positioning columns for fixedly connecting handles of the intramedullary nails are further arranged on the connecting rod along the length direction of the connecting rod, so that the handle positioning columns and the thread positioning columns are respectively positioned at two sides of the connecting rod;
the handle positioning column is arranged on an end face, deviating from the thread positioning column, of the connecting rod.
Preferably, a plurality of second connecting holes are formed in the far-end aiming arm at equal intervals along the length direction of the far-end aiming arm and are used for connecting the adjusting assembly;
and the thread positioning column penetrates through the second connecting hole to be fixed with the screwing nut through threads.
Furthermore, a static locking hole and a dynamic locking hole are formed in the far-end aiming arm along the length direction of the far-end aiming arm, and gaps between the static locking hole and the dynamic locking hole are formed, so that the second connecting hole, the static locking hole and the dynamic locking hole are sequentially formed in the same axial line along the length direction of the far-end aiming arm.
Furthermore, the cross section of the dynamic locking hole is 8-shaped and is arranged along the length direction of the far-end aiming arm, so that an arc end of the 8-shaped structure is close to the direction of the static locking hole to be used for aiming at the static locking hole at the far end of the intramedullary nail;
wherein the 8-shaped structure is communicated with the middle, so that the distal locking sleeve slides in the dynamic locking hole.
Furthermore, the adjusting component comprises a first connecting column, a threaded rod, a sleeve, an adjusting nut and a second connecting column, one end of the first connecting column is used for being inserted into the threaded positioning column, and the other end of the first connecting column is connected with the threaded rod; one end of the second connecting column is used for being inserted into the second connecting hole, the other end of the second connecting column is connected with the sleeve, so that the threaded rod extends into the sleeve, and then the threaded rod is connected with the sleeve through the adjusting nut.
Preferably, keep away from on No. two spliced poles the one end of No. two spliced poles has seted up the round annular along its circumference, be equipped with in the adjusting nut with the fixture block of annular adaptation, just the adjusting nut with establish the screw hole in the one end that the threaded rod is connected, be used for with threaded rod threaded connection makes forward or reverse rotation the adjusting nut is in order to adjust the threaded rod stretches into length or locking in the sleeve adjusting part.
Furthermore, the adjusting component also comprises a fixing pin, so that after the threaded rod is inserted into the sleeve, the threaded rod sequentially penetrates through the open slot on the sleeve and the jack arranged on the threaded rod from the insertion end of the fixing pin to abut against the inner bottom wall of the sleeve.
The invention discloses an adjustable aiming arm for an intramedullary nail, which has the advantages that: the structure designed by the invention enables the far-end aiming arm to be concentric with the far-end lock hole of the intramedullary nail so as to penetrate through the far-end lock hole of the intramedullary nail to drill to the opposite cortex of the femur during the far-end interlocking drilling, thereby ensuring the lock hole of the intramedullary nail after the screw is finally screwed in;
in addition, the structural design of the invention can solve the technical defects that the curvature of the intramedullary nail and the femoral medullary cavity is not matched in the prior art, so that the distal lockhole is deviated after the intramedullary nail is deformed, thereby prolonging the operation time, increasing the C-arm fluoroscopy times and increasing the ray damage to the human body.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a perspective view of an adjustable aiming arm for an intramedullary nail according to the present invention;
FIG. 2 is a schematic perspective view of a connecting rod;
FIG. 3 is a perspective view of the distal aiming arm;
FIG. 4 is a schematic view of the conjoined structure of the adjustment assembly;
FIG. 5 is a perspective view of the adjustment assembly without the adjustment nut;
FIG. 6 is a schematic perspective view of the adjustment assembly with a first connecting post, a threaded rod, and a fixing pin;
FIG. 7 is a cross-sectional structural schematic view of the adjustment assembly;
fig. 8 and 9 are schematic perspective views of the adjusting nut from different viewing angles, respectively;
wherein:
1-a connecting rod, 11-a connecting hole, 12-a thread positioning column, 13-a bearing block and 14-a handle positioning column;
2-far end aiming arm, 21-second connecting hole, 22-static locking hole, 23-dynamic locking hole;
3-adjusting component, 31-connecting column I, 32-threaded rod, 32 a-jack, 33-sleeve, 33 a-ring groove, 33 b-open slot, 34-adjusting nut, 34 a-clamping block, 35-connecting column II and 36-fixing pin;
4-screwing the screw cap and 5-lightening the hole.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
In order to solve the defect caused by the deviation of the distal lock hole after the deformation of the intramedullary nail due to the mismatch of the curvature of the intramedullary nail and the femoral medullary cavity, the invention provides an adjustable aiming arm for the intramedullary nail, which comprises: the connecting rod 1 is used for being fixed on the handle of the intramedullary nail; the distal aiming arm 2 is used for controlling the distal end of the intramedullary nail to carry out static locking or dynamic locking; the two ends of the adjusting component 3 are respectively connected with the connecting rod 1 and the far-end aiming arm 2, and the relative angle and the length of the connecting rod 1 and the far-end aiming arm 2 can be adjusted by controlling the adjusting component 3; and a nut 4 is screwed for fixing and adjusting the position of the far-end aiming arm 2 and the connecting rod 1 to prevent the far-end aiming arm 2 from being separated.
The specific operation process is as follows: after installing distal end locking sleeve, the rotating can cooperate behind the nut 4 of screwing adjusting part 3, in order to adjust adjusting part 3 extension or shorten, in order to drive distal end aiming arm 2 is rotatory, adjusts promptly the position of 2 distal end lockholes of distal end aiming arm makes it align with intramedullary nail distal end lockhole, no matter how the intramedullary nail warp in the pulp chamber, once or twice back in C arm perspective, all can make the lockhole align through adjusting, remedied the intramedullary nail warp back in the art the inaccurate shortcoming of 2 sighting of distal end aiming arm reduces the time of C arm perspective, reduces the injury of ray to patient and doctor.
In the specific implementation process, a plurality of unconnected lightening holes 5 are formed in the length direction of the connecting rod 1 and the length direction of the far-end aiming arm 2, so that the burden of a patient is reduced, and the comfort of the patient is improved.
In a specific embodiment, as shown in fig. 2, two first connecting holes 11 are symmetrically formed in the middle of the connecting rod 1 along the width direction of the connecting rod, and a threaded positioning post 12 is arranged on the top surface of one end of the connecting rod 1; the first connecting hole 11 is used for being connected with one end of the adjusting component 3, and the threaded positioning column 12 is used for penetrating through the distal aiming arm 2 and being fixed with the screwing nut 4 in a threaded manner. More specifically, the part of the screwing nut 4 contacting the threaded positioning column 12 is designed as an internal thread, and the screwing nut 4 is rotated in different directions to complete locking fixation or relative rotation of the connecting rod 1 and the distal aiming arm 2, so that the operation is convenient.
In a specific implementation process, two bearing blocks 13 are arranged in the middle of the connecting rod 1 towards one side provided with the threaded positioning column 12, and the two bearing blocks 13 are arranged in a splayed structure along the width direction of the connecting rod 1; the two first connecting holes 11 are symmetrically formed in the two bearing blocks 13, so that the connecting rod 1 and the far-end aiming arm 2 can be conveniently adjusted, the adjusting assembly 3 can be more conveniently mounted or dismounted, the direction of the connecting rod 1 can be conveniently identified, and convenience is brought to assembly of the structure of the invention.
The connecting rod 1 is further provided with two handle positioning columns 14 along the length direction thereof for fixedly connecting handles of intramedullary nails, so that the handle positioning columns 14 and the thread positioning columns 12 are respectively positioned at two sides of the connecting rod 1; the handle positioning column 14 is disposed on an end surface of the connecting rod 1 away from the threaded positioning column 12.
In a specific embodiment, as shown in fig. 3, a plurality of second connecting holes 21 are formed in the distal aiming arm 2 at equal intervals along the length direction thereof for connecting the adjusting assembly 3, and the corresponding second connecting holes 21 are selected to be connected with the adjusting assembly 3 according to intramedullary nails of different lengths; the second connecting hole 21 on the far-end aiming arm 2 and the lightening hole 5 are arranged at intervals; the threaded positioning column 12 penetrates through the second connecting hole 21 and is fixed with the screwing nut 4 in a threaded manner.
When the technical scheme is specifically realized, a static locking hole 22 and a dynamic locking hole 23 are formed in the far-end aiming arm 2 along the length direction of the far-end aiming arm, and the static locking hole 22 and the dynamic locking hole 23 are arranged in a clearance manner, so that the second connecting hole 21, the static locking hole 22 and the dynamic locking hole 23 are coaxially and sequentially arranged along the length direction of the far-end aiming arm 2, and a plurality of lightening holes 5 are positioned on one side provided with the second connecting hole 21 and are arranged at intervals with the second connecting hole 21; the position of the lock hole of the intramedullary nail is convenient to find and is concentric with the lock hole.
In order to adjust the position of the main nail before and after the closing of the fracture line, the cross section of the dynamic locking hole 23 is shaped like an 8, and the cross section is arranged along the length direction of the far-end aiming arm 2, so that one arc end of the 8-shaped structure is close to the static locking hole 22, wherein the 8-shaped structure is communicated with the middle part, so that the far-end locking sleeve slides in the dynamic locking hole 23 for guiding;
in specific implementation, when the distal locking sleeve is selectively inserted into the dynamic locking hole 23 on the side away from the static locking hole 22, namely the inserted distal locking sleeve corresponds to the distal end of the long hole on the main nail, if the fracture reduction is not good, the bone can be moved to make the fracture parts closely contact, namely the fracture part is pressurized; if the fracture part is well reduced, the far-end locking sleeve can be directly selected from the static locking hole 22 or the side, close to the static locking hole 22, of the dynamic locking hole 23.
In a specific implementation of the technical solution, as shown in fig. 4 to 7, the adjusting assembly 3 includes a first connecting column 31, a threaded rod 32, a sleeve 33, an adjusting nut 34, and a second connecting column 35, one end of the first connecting column 31 is used for being inserted into the threaded positioning column 12, and the other end is connected to the threaded rod 32; one end of the second connecting column 35 is used for being inserted into the second connecting hole 21, and the other end of the second connecting column is connected with the sleeve 33, so that after the threaded rod 32 extends into the sleeve 33, the threaded rod 32 and the sleeve 33 are connected through the adjusting nut 34; in a specific implementation, the adjustment nut 34 and the tightening nut 4 may be rotated as needed to adjust the position of the distal aiming arm 2.
When this technical scheme of concrete realization, convenient regulation, it is shown according to fig. 5, keep away from on the sleeve 33 No. two spliced poles 35's one end is seted up round annular 33a along its circumference, and is shown according to fig. 7, fig. 8, be equipped with in the adjusting nut 34 with the fixture block 34a of annular 33a adaptation, just adjusting nut 34 with establish the screw hole in the one end that threaded rod 32 is connected, be used for with threaded rod 32 threaded connection for forward or reverse rotation adjusting nut 34 is in order to adjust threaded rod 32 stretches into length or locking in the sleeve 33 adjusting part 3.
In order to avoid the detachment, the adjusting assembly 3 further includes a fixing pin 36, so that after the threaded rod 32 is inserted into the sleeve 33, the fixing pin 36 passes through the opening groove 33b of the sleeve 33 and the insertion hole 32a formed in the threaded rod 32 in sequence to abut against the inner bottom wall of the sleeve 33 through the insertion end thereof.
In the structure of the invention, the first connecting hole 11, the lightening hole 5 and the second connecting hole 21 are preferably through holes.
The structures not specified in the present invention and their uses are conventional techniques, for example: distal locking sleeves, main nails, etc. are conventional aids used in the art in this field.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An adjustable aiming arm for an intramedullary nail, characterized by: comprises that
The connecting rod (1) is used for being fixed on the handle of the intramedullary nail;
the distal aiming arm (2) is used for controlling the distal end of the intramedullary nail to carry out static locking or dynamic locking;
the two ends of the adjusting component (3) are respectively connected with the connecting rod (1) and the far-end aiming arm (2), and the relative angles and the lengths of the connecting rod (1) and the far-end aiming arm (2) can be adjusted by controlling the adjusting component (3);
and the screwing nut (4) is used for fixing the far-end aiming arm (2) and the connecting rod (1) after the position is adjusted.
2. The adjustable aiming arm for an intramedullary nail of claim 1, wherein: the middle part of the connecting rod (1) is symmetrically provided with two first connecting holes (11) along the width direction of the connecting rod, and the top surface of one end of the connecting rod (1) is provided with a threaded positioning column (12);
the first connecting hole (11) is used for being connected with one end of the adjusting component (3), and the threaded positioning column (12) is used for penetrating through the far-end aiming arm (2) and is in threaded fixation with the screwing nut (4).
3. The adjustable aiming arm for an intramedullary nail of claim 2, wherein: two bearing blocks (13) are arranged in the middle of the connecting rod (1) towards one side provided with the threaded positioning column (12), and the two bearing blocks (13) are arranged in a splayed structure along the width direction of the connecting rod (1);
the two first connecting holes (11) are symmetrically formed in the two bearing blocks (13).
4. The adjustable aiming arm for an intramedullary nail of claim 3, wherein: two handle positioning columns (14) for fixedly connecting handles of intramedullary nails are further arranged on the connecting rod (1) along the length direction of the connecting rod, so that the handle positioning columns (14) and the thread positioning columns (12) are respectively positioned at two sides of the connecting rod (1);
the handle positioning column (14) is arranged on one end face, deviating from the threaded positioning column (12), of the connecting rod (1).
5. The adjustable aiming arm for an intramedullary nail of claim 2, wherein: a plurality of second connecting holes (21) are formed in the far-end aiming arm (2) at equal intervals along the length direction of the far-end aiming arm and are used for connecting the adjusting component (3);
the threaded positioning column (12) penetrates through the second connecting hole (21) and is in threaded fixation with the screwing nut (4).
6. The adjustable aiming arm for intramedullary nails of claim 5, wherein: the remote aiming arm (2) is provided with a static locking hole (22) and a dynamic locking hole (23) along the length direction of the remote aiming arm, the static locking hole (22) and the dynamic locking hole (23) are arranged in a clearance mode, so that the second connecting hole (21), the static locking hole (22) and the dynamic locking hole (23) are arranged on the remote aiming arm (2) along the same axial line in sequence in the length direction of the remote aiming arm.
7. The adjustable aiming arm for an intramedullary nail of claim 6, wherein: the cross section of the dynamic locking hole (23) is 8-shaped, and is arranged along the length direction of the far-end aiming arm (2), so that one circular arc end of the 8-shaped structure is close to the direction of the static locking hole (22) and is used for aligning to the static locking hole at the far end of the intramedullary nail;
wherein the 8-shaped structure is communicated with the middle, so that the distal locking sleeve slides in the dynamic locking hole (23).
8. The adjustable aiming arm for intramedullary nails of claim 5, wherein: the adjusting component (3) comprises a first connecting column (31), a threaded rod (32), a sleeve (33), an adjusting nut (34) and a second connecting column (35), one end of the first connecting column (31) is used for being inserted into the threaded positioning column (12), and the other end of the first connecting column is connected with the threaded rod (32); the one end of No. two spliced poles (35) is used for inserting No. two connecting holes (21), the other end with sleeve (33) are connected, make threaded rod (32) stretch into back in sleeve (33), through adjusting nut (34) will threaded rod (32) sleeve (33) are connected.
9. The adjustable aiming arm for an intramedullary nail of claim 8, wherein: keep away from on No. two spliced poles (35) round annular (33a) have been seted up along its circumference to the one end of No. two spliced poles (35), be equipped with in adjusting nut (34) with fixture block (34a) of annular (33a) adaptation, just adjusting nut (34) with establish the screw hole in the one end that threaded rod (32) are connected, be used for with threaded rod (32) threaded connection makes forward or reverse rotation adjusting nut (34) are with the regulation threaded rod (32) stretch into length or locking in sleeve (33) adjusting part (3).
10. The adjustable aiming arm for an intramedullary nail of claim 9, wherein: the adjusting component (3) further comprises a fixing pin (36), so that after the threaded rod (32) is inserted into the sleeve (33), the inserting end of the fixing pin (36) sequentially penetrates through an opening groove (33b) in the sleeve (33) and an inserting hole (32a) formed in the threaded rod (32) to abut against the inner bottom wall of the sleeve (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110908864.3A CN113558743A (en) | 2021-08-09 | 2021-08-09 | Adjustable aiming arm for intramedullary nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110908864.3A CN113558743A (en) | 2021-08-09 | 2021-08-09 | Adjustable aiming arm for intramedullary nail |
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| Publication Number | Publication Date |
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| CN113558743A true CN113558743A (en) | 2021-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110908864.3A Pending CN113558743A (en) | 2021-08-09 | 2021-08-09 | Adjustable aiming arm for intramedullary nail |
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| CN213851002U (en) * | 2020-10-27 | 2021-08-03 | 常州君华医疗科技有限公司 | Adjustable sighting device for distal end of long nail of femoral intramedullary nail |
| CN215458575U (en) * | 2021-08-09 | 2022-01-11 | 北京市春立正达医疗器械股份有限公司 | Lock hole aiming frame for intramedullary nail |
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| CN210447322U (en) * | 2019-05-24 | 2020-05-05 | 邓蕴源 | Double-rod traction lower radius fracture fixing brace |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211029 |
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| RJ01 | Rejection of invention patent application after publication |