CN113317884B - Anterior cruciate ligament stump expander - Google Patents
Anterior cruciate ligament stump expander Download PDFInfo
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- CN113317884B CN113317884B CN202110766079.9A CN202110766079A CN113317884B CN 113317884 B CN113317884 B CN 113317884B CN 202110766079 A CN202110766079 A CN 202110766079A CN 113317884 B CN113317884 B CN 113317884B
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- expansion head
- guide needle
- elastic
- expansion
- push rod
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- 210000001264 anterior cruciate ligament Anatomy 0.000 title claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims description 35
- 238000000576 coating method Methods 0.000 claims description 35
- 210000003041 ligament Anatomy 0.000 abstract description 19
- 208000035965 Postoperative Complications Diseases 0.000 abstract description 3
- 238000004393 prognosis Methods 0.000 abstract description 3
- 239000007943 implant Substances 0.000 description 7
- 210000000629 knee joint Anatomy 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 210000000412 mechanoreceptor Anatomy 0.000 description 4
- 108091008704 mechanoreceptors Proteins 0.000 description 4
- 210000000988 bone and bone Anatomy 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 210000002303 tibia Anatomy 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000036770 blood supply Effects 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000009023 proprioceptive sensation Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 210000000689 upper leg Anatomy 0.000 description 2
- 230000002792 vascular Effects 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 210000000577 adipose tissue Anatomy 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000916 dilatatory effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000030214 innervation Effects 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000000272 proprioceptive effect Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000000250 revascularization Effects 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 210000001179 synovial fluid Anatomy 0.000 description 1
- 210000005222 synovial tissue Anatomy 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Abstract
The invention discloses an anterior cruciate ligament stump expander, which comprises a guide pin, an expanding head, a push rod and a handle; one end of the guide needle is a guide needle head, the other end of the guide needle is connected with the handle, the expansion head is a hollow structure with an elastic framework arranged inside, the expansion head is sleeved outside the guide needle, one end of the expansion head, which is close to the guide needle, is a fixed end fixedly connected with the guide needle, the other end of the expansion head, which is far away from the guide needle, is a sliding end which is in sliding connection with the guide needle, the push rod is of a hollow pipe body structure, the push rod is arranged between the expansion head and the handle and sleeved outside the guide needle, one end of the push rod is connected with the sliding end of the expansion head, and the other end of the push rod is provided with a locking part; the anterior cruciate ligament stump expander is applied to cruciate ligament residual protection reconstruction operation, can simply and efficiently realize the maximum surrounding of the residual ACL ligament, avoids the collision of intercondylar fossa, reduces postoperative complications and improves the prognosis of patients.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to an anterior cruciate ligament stump expander.
Background
Anterior cruciate ligament (anterior cruciate ligament, ACL) injury is a common motor injury. The instability of the knee joint caused by ACL damage affects not only the patient's daily life and movement, but also further other structures within the joint. Therefore, to restore the stability of the knee joint, it has been agreed that the reconstruction of the damaged ACL. In order to clearly show the footprint area of the ACL femur and tibia dead points in the operation, the traditional ACL reconstruction operation usually cleans the ACL stump. In recent years, the research on ACL ligament reconstruction by students at home and abroad focuses not only on the aspect of biomechanical function recovery after reconstruction operation, but also on the influence of biological healing of ACL and proprioception recovery on knee joint movement function. At present, researches show that mechanoreceptors for controlling the proprioception of the knee joint exist around ACL ligaments, most of mechanoreceptors are positioned in a synovial intimal structure near a tibia dead center, have the functions of sensing joint position sense and balance sense, participate in nerve reflex, and maintain the stability of the knee joint by stimulating muscle to coordinate and shrink, so that the retention of ACL ligament stumps is beneficial for the mechanoreceptors to stretch into grafts, so that the mechanoreceptors regain innervation and the proprioceptive function is recovered. ACL blood supply mainly branches from the middle knee artery, and the distal part relies on the subknee artery passing through the subpatellar fat pad to finally form a synovial tissue vascular bundle surrounding ligament tissue, so that the preservation of the soft tissue vascular bundle around the ACL ligament stump can provide an important blood supply source for the transplanted muscle, and further promote the revascularization process of the graft. Current research shows that the expansion and dissolution phenomenon of the inner opening of the bone tunnel can occur after ACL reconstruction operation, which is caused by negative influence of joint synovial fluid on healing of tendon bone of the reconstruction ligament, and finally the graft is loosened, while the reserved ACL ligament stump can play a role in blocking the inner opening of the tunnel, so that the joint fluid is prevented from entering the bone tunnel, and the long enough stump can establish new connection of femur and tibia, so that the overall tensile breaking strength of the graft is increased, and therefore, the reserved ACL ligament stump is helpful for preventing the re-relaxation of the graft. At present, the residual ligament stump in ACL fracture patient operation is gradually accepted by clinicians, the ideal residual ligament is of course completely wrapped around the implant, and the extension is limited because of no collision of intercondylar fossa and single eye deformity, but the clinical situation often causes the visual field to be unclear because of the existence of the stump, the positioning inaccuracy occurs, the situation that the residual ligament wraps around the implant is difficult to achieve, and even the forward collision can occur because of excessive forward movement of the stump.
In summary, how to provide a technique or device, which can simply and efficiently realize the maximum wrapping of the residual ACL ligament around the implant, and avoid the collision of intercondylar fossa, thereby reducing postoperative complications and improving prognosis of patients, is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an anterior cruciate ligament stump expander, which solves the problems of the prior art and can simply and efficiently realize the maximum wrapping of residual ACL ligaments.
In order to achieve the above object, the present invention provides the following solutions:
The invention provides an anterior cruciate ligament stump expander, which comprises a guide pin, an expanding head, a push rod and a handle; one end of the guide needle is a guide needle head, the other end of the guide needle is connected with the handle, the expansion head is of a hollow structure with an elastic framework arranged inside, the expansion head is sleeved outside the guide needle, one end of the expansion head, which is close to the guide needle, is a fixed end fixedly connected with the guide needle, the other end of the expansion head, which is far away from the guide needle, is a sliding end which is in sliding connection with the guide needle, the push rod is of a hollow pipe body structure, the push rod is arranged between the expansion head and the handle and is sleeved outside the guide needle, one end of the push rod is connected with the sliding end of the expansion head, and the other end of the push rod is provided with a locking part.
Preferably, a fixing part fixedly connected with the guide needle is arranged at one end, close to the guide needle, of the guide needle, and one end of the expansion head is connected with the fixing part to form a fixing end; one end of the guide needle, which is far away from the guide needle head, is provided with a sliding part which is in sliding connection with the guide needle, and the other end of the expansion head is connected with the sliding part to form a sliding end.
Preferably, the expansion head comprises an expansion head coating, an elastic framework and a framework binding point, the expansion head coating is sleeved outside the guide pin, one end of the expansion head coating is connected with the fixing part, the other end of the expansion head coating is connected with the sliding part, the framework binding point is arranged on the inner wall of the expansion head coating, the elastic framework is arranged inside the expansion head coating, two groups of elastic frameworks are arranged, one group of elastic frameworks are connected with the fixing part at the outer end, the other group of elastic frameworks are connected with the sliding part at the outer end, and the inner ends of the two groups of elastic frameworks are connected at the framework binding point.
Preferably, the expansion head coating is an elastic film supported by an elastic framework, and the axis of the supported expansion head coating coincides with the axis of the guide pin; the four skeleton binding points are circumferentially and uniformly distributed on the inner wall of the expansion head coating, and a plane formed by the four skeleton binding points is a transverse central plane of the expansion head coating; the two groups of elastic frameworks are symmetrically arranged by taking the transverse central plane of the expansion head coating as a center; each group of elastic frameworks is composed of four elastic frameworks, and one group of four elastic frameworks and the other group of four elastic frameworks are respectively connected in pairs at four framework joint points.
Preferably, each elastic framework comprises a convex elastic framework and a concave elastic framework, the convex elastic frameworks are arranged close to the inner wall of the expansion head coating, and the concave elastic frameworks are positioned on the inner side of the convex elastic frameworks.
Preferably, the tip of the guide needle is in a conical tip structure.
Preferably, an expansion degree mark is arranged at one end of the guide needle connected with the handle, and when the expansion head is in an initial state, one end of the push rod far away from the sliding end is opposite to the initial expansion degree mark.
Preferably, the initial shape of the expansion head is a cylinder structure, and the expansion shape of the expansion head is an oval structure.
Preferably, the locking part is a fastening screw which is transversely arranged and is in threaded connection with the side wall of the push rod, and when the fastening screw transversely abuts against the guide pin, the axial fixation of the push rod is realized.
Preferably, the handle is a rectangular handle with a concave surface arranged on one of the vertical end surfaces.
Compared with the prior art, the invention has the following beneficial technical effects:
The invention provides an anterior cruciate ligament stump expander, which comprises a guide pin, an expansion head, a push rod and a handle, wherein an elastic framework is arranged in the expansion head, the expansion of the expansion head is realized by pushing the push rod on the guide pin, the size of the expansion head is gradually adjusted from small to large in the process of pushing the push rod so as to expand an ACL stump until the expansion head is expanded to the same diameter as an implant, then other operations of ACL reconstruction are completed, finally the implant passes through the expanded ACL stump, and the residual ACL ligament is further wrapped around the implant to the greatest extent; the device has simple structure and convenient operation, is applied to the cruciate ligament residual-protection reconstruction operation, can realize the wrapping graft of the residual ACL ligament to the greatest extent relatively simply and efficiently, and avoids the collision of intercondylar fossa, thereby reducing the postoperative complications and improving the prognosis of patients.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view showing the construction of an anterior cruciate ligament stump expander according to the present invention;
In the figure: 1. a guide needle; 2. an expansion head; 3. a guide pin; 4. a handle; 41-concave; 5. an elastic skeleton; 6. a push rod; 7. a fastening screw; 8. expanding the head envelope; 9. a convex elastic skeleton; 10. a concave elastic skeleton; 11. a backbone binding site; 12. a fixing part; 13. a sliding part; 14. and (5) identifying the expansion degree.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide an anterior cruciate ligament stump expander, which solves the problems existing in the prior art.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The anterior cruciate ligament stump dilator in the embodiment, as shown in fig. 1, comprises a guide needle 3, a dilating head 2, a push rod 6 and a handle 4; one end of the guide needle 3 is a guide needle head 1, the other end of the guide needle 3 is connected with a handle 4, the expansion head 2 is of a hollow structure with an elastic framework 5 arranged inside, the expansion head 2 is sleeved outside the guide needle 3, one end of the expansion head 2, which is close to the guide needle 1, is a fixed end fixedly connected with the guide needle 3, the other end of the expansion head 2, which is far away from the guide needle 1, is a sliding end which is slidably connected with the guide needle 3, the push rod 6 is of a hollow pipe body structure, the push rod 6 is arranged between the expansion head 2 and the handle 4 and sleeved outside the guide needle 3, one end of the push rod 6 is connected with the sliding end of the expansion head 2, and the other end of the push rod 6 is provided with a locking part.
In the embodiment, a fixing part 12 is integrally arranged at one end of the guide needle 3 close to the guide needle head 1, and one end of the expansion head 2 is connected with the fixing part 12 to form a fixing end; one end of the guide needle 3, which is far away from the guide needle head 1, is provided with a sliding part 13 which is in sliding connection with the guide needle 3, and the other end of the expansion head 2 is connected with the sliding part 13 to form a sliding end.
Specifically, the expansion head 2 comprises an expansion head coating 8, an elastic framework 5 and a framework binding point 11, the expansion head coating 8 is sleeved outside the guide pin 3, the expansion head coating 8 is an elastic film supported by the elastic framework 5, and the axis of the supported expansion head coating 8 coincides with the axis of the guide pin 3; one end of the expansion head coating 8 is connected with the fixed part 12, the other end of the expansion head coating 8 is connected with the sliding part 13, and the skeleton joint 11 is arranged on the inner wall of the expansion head coating 8; specifically, four skeleton binding points 11 are arranged, the four skeleton binding points 11 are circumferentially and uniformly distributed on the inner wall of the expansion head coating 8, and a plane formed by the four skeleton binding points 11 is a transverse central plane of the expansion head coating 8; the elastic frameworks 5 are arranged in the expansion head coating 8, two groups of elastic frameworks 5 are arranged, the outer ends of one group of elastic frameworks 5 are connected with the fixing part 12, the outer ends of the other group of elastic frameworks 5 are connected with the sliding part 13, and the inner ends of the two groups of elastic frameworks 5 are connected at the framework joint 11; specifically, the two groups of elastic frameworks 5 are symmetrically arranged with the transverse central plane of the expansion head coating 8 as a center, each group of elastic frameworks 5 is composed of four elastic frameworks 5, and the four elastic frameworks 5 of one group are respectively connected with the four elastic frameworks 5 of the other group in pairs at four framework joint points 11.
With respect to the structure of the elastic frameworks 5, in this embodiment, each elastic framework 5 is composed of a convex elastic framework 9 and a concave elastic framework 10, the convex elastic framework 9 is disposed close to the inner wall of the expansion head envelope 8, and the concave elastic framework 10 is located inside the convex elastic framework 9.
In the embodiment, the tip of the guide needle 1 is in a conical tip structure; the end of the guide pin 3 connected with the handle 4 is provided with an expansion degree mark 14, and when the expansion head 2 is in an initial state, the end of the push rod 6 far away from the sliding end is opposite to the initial expansion degree mark 14.
In this embodiment, the initial shape of the expansion head 2 is a cylindrical structure, and the expanded shape of the expansion head 2 is an elliptical structure (the expanded shape of the expansion head 2 is shown in fig. 1).
In this embodiment, the locking portion is a fastening screw 7 that is transversely disposed and is in threaded connection with the sidewall of the push rod 6, and when the fastening screw 7 transversely abuts against the guide pin 3, axial fixing of the push rod 6 is achieved, that is, the push rod 6 is locked and cannot be pushed axially.
In this embodiment, the handle 4 is a rectangular handle with a concave surface 15 on one of its vertical end surfaces.
The specific operation method for applying the anterior cruciate ligament stump dilator in the cruciate ligament residual protection reconstruction operation comprises the following steps:
When the anterior cruciate ligament residual-reconstruction operation is performed, the center of the ACL tibial dead center is positioned by using the assistance of the anterior cruciate ligament positioner, then the tunnel diameter of the corresponding implant diameter is drilled, the fastening screw 7 is in an unfastened state, the expansion head 2 is adjusted to be in an initial form, the optimal residual end opening is selected, the guide needle 1 is used for supporting the expansion opening, the long axis direction of the guide needle 3 is held by the hand, the cambered surface 15 of the handle 4 and other straight surfaces of the handle 4 are held, the expansion head 2 is gradually pushed until the other end of the ACL residual end is withdrawn, the anterior cruciate ligament residual-end expander is completed, the expansion head 2 is gradually pushed until the other end of the ACL residual end is gradually pushed, the push rod 6 is pushed, the sliding part 13 is close to the fixing part 12 along the long axis of the guide needle 3, the curvature of the convex elastic skeleton 9 and the concave elastic skeleton 10 is gradually increased, the four skeleton joint points 11 are mutually separated, the expansion head envelope 8 is gradually tensioned, the size of the expansion head 2 is determined according to the indication of the expansion degree mark 14, the fastening screw 7 is tightly screwed, the expansion head 2 is gradually pushed, the expansion is gradually completed, the expansion is completed again, the expansion is gradually, the size of the expansion head 2 is gradually adjusted gradually, the expansion is gradually, until the ACL expansion is gradually adjusted to be gradually, until the expansion is completed, the ACL diameter is gradually and the expansion is gradually reached, the expansion is completed, and the final operation is completed, and the expansion of the ACL has been completed, and the expansion is completed.
The principles and embodiments of the present invention have been described with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In summary, the present description should not be construed as limiting the invention.
Claims (7)
1. An anterior cruciate ligament stump dilator, characterized by: comprises a guide needle, an expansion head, a push rod and a handle; one end of the guide needle is a guide needle head, the other end of the guide needle is connected with the handle, the expansion head is of a hollow structure with an elastic framework arranged inside, the expansion head is sleeved outside the guide needle, one end of the expansion head, which is close to the guide needle, is a fixed end fixedly connected with the guide needle, the other end of the expansion head, which is far away from the guide needle, is a sliding end which is in sliding connection with the guide needle, the push rod is of a hollow pipe body structure, the push rod is arranged between the expansion head and the handle and sleeved outside the guide needle, one end of the push rod is connected with the sliding end of the expansion head, and the other end of the push rod is provided with a locking part;
A fixing part fixedly connected with the guide needle is arranged at one end, close to the guide needle head, of the guide needle, and one end of the expansion head is connected with the fixing part to form a fixing end; one end of the guide needle, which is far away from the guide needle head, is provided with a sliding part which is in sliding connection with the guide needle, and the other end of the expansion head is connected with the sliding part to form a sliding end;
The expansion head comprises an expansion head coating, an elastic framework and framework binding points, wherein the expansion head coating is sleeved outside the guide pin, one end of the expansion head coating is connected with the fixed part, the other end of the expansion head coating is connected with the sliding part, the framework binding points are arranged on the inner wall of the expansion head coating, the elastic framework is arranged inside the expansion head coating, two groups of elastic frameworks are arranged, one group of elastic frameworks are connected with the fixed part at the outer ends, the other group of elastic frameworks are connected with the sliding part at the outer ends, and the inner ends of the two groups of elastic frameworks are connected at the framework binding points;
The expansion head coating is an elastic film supported by an elastic framework, and the axis of the supported expansion head coating coincides with the axis of the guide pin; the four skeleton binding points are circumferentially and uniformly distributed on the inner wall of the expansion head coating, and a plane formed by the four skeleton binding points is a transverse central plane of the expansion head coating; the two groups of elastic frameworks are symmetrically arranged by taking the transverse central plane of the expansion head coating as a center; each group of elastic frameworks is composed of four elastic frameworks, and one group of four elastic frameworks and the other group of four elastic frameworks are respectively connected in pairs at four framework joint points.
2. The anterior cruciate ligament stump dilator of claim 1, wherein: each elastic framework comprises a convex elastic framework and a concave elastic framework, the convex elastic frameworks are arranged close to the inner wall of the expansion head coating, and the concave elastic frameworks are positioned on the inner side of the convex elastic frameworks.
3. The anterior cruciate ligament stump dilator of claim 1, wherein: the tip of the guide needle head is in a cone tip structure.
4. The anterior cruciate ligament stump dilator of claim 1, wherein: the guide needle is provided with the expansion degree sign with the one end that the handle is connected, when the expansion head is initial state, the push rod keep away from the one end of slip end is relative with initial expansion degree sign.
5. The anterior cruciate ligament stump dilator of claim 1, wherein: the initial form of the expansion head is a cylinder structure, and the expansion form of the expansion head is an elliptic structure.
6. The anterior cruciate ligament stump dilator of claim 1, wherein: the locking part is a fastening screw which is transversely arranged and in threaded connection with the side wall of the push rod, and the axial fixation of the push rod is realized when the fastening screw transversely abuts against the guide pin.
7. The anterior cruciate ligament stump dilator of claim 1, wherein: the handle is a rectangular handle with a concave surface arranged on one of the vertical end faces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110766079.9A CN113317884B (en) | 2021-07-07 | Anterior cruciate ligament stump expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110766079.9A CN113317884B (en) | 2021-07-07 | Anterior cruciate ligament stump expander |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113317884A CN113317884A (en) | 2021-08-31 |
| CN113317884B true CN113317884B (en) | 2024-07-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215349543U (en) * | 2021-07-07 | 2021-12-31 | 浙江大学 | Anterior cruciate ligament stump dilator |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215349543U (en) * | 2021-07-07 | 2021-12-31 | 浙江大学 | Anterior cruciate ligament stump dilator |
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Address after: 311121 Zhejiang University, No. 866, yuhangtang Road, Xihu District, Hangzhou, Zhejiang Province (Ningbo No. 6 Institute of Binjiang Research Institute, Zhejiang University) Applicant after: ZHEJIANG University Address before: Zhejiang University (Ningbo Sixth Hospital of Zhejiang Second Medical College), No. 866, yuhangtang Road, Xihu District, Hangzhou, Zhejiang 311121 Applicant before: ZHEJIANG University |
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