CN109700518B - Intramedullary bone extension auxiliary device - Google Patents
Intramedullary bone extension auxiliary device Download PDFInfo
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- CN109700518B CN109700518B CN201910083886.3A CN201910083886A CN109700518B CN 109700518 B CN109700518 B CN 109700518B CN 201910083886 A CN201910083886 A CN 201910083886A CN 109700518 B CN109700518 B CN 109700518B
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Abstract
The invention discloses an intramedullary bone lengthening auxiliary device, which comprises a first main body and a second main body, wherein locking nail holes are uniformly distributed in the first main body and the second main body, a sliding cavity is formed in the first main body, a first blocking piece, a second blocking piece and a third blocking piece are arranged in the sliding cavity, a first hydraulic cavity is formed between the first blocking piece and the second blocking piece, a second hydraulic cavity is formed between the second blocking piece and the third blocking piece, a second through hole is formed in the middle of the second blocking piece, a first elastic piece is arranged between the first blocking piece and the bottom wall of the sliding cavity, and one end of the second main body is connected with the third blocking piece. Inside the medullary cavity that will first main part and second main part be fixed respectively through the locking nail hole, under the effect of first elastic component, push away hydraulic oil to the second hydraulic pressure chamber from first hydraulic pressure chamber through first separation blade, make the second main part remove through the third separation blade, accomplish the process of extension. The invention has reasonable structure and can be widely applied to the technical field of medical instruments.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an intramedullary bone lengthening auxiliary device.
Background
For most severe long bone defects, the use of live bone, periosteal flap or complex tissue grafts is the best method for treating long bone defects, and complex grafts with vascular periosteal flaps or combined allograft bone grafts also have good efficacy, but this has different conclusions. The bone and periosteum transplantation with the vascular pedicle has the advantages of osteogenesis capacity, small damage to a supply area after the bone and periosteum are cut, few complications, capability of being molded according to the requirement of a receiving area and the like, and is widely applied to treating nonunion, osteonecrosis, old fracture and osteomyelitis and filling bone defects after bone tumor resection at present. However, the above treatment has its limitations, and is often unsatisfactory for treating a real large bone defect, and more treatment methods are still needed for supplement.
The defect of long bone is short, the small can be completed by adopting autologous bone transplantation, artificial bone filling or mixed bone grafting, and the marrow-expanded product retained by the marrow-expanded retaining device can be recovered for re-implantation through limb shortening operation. When the bone quantity is not enough, the patient can be filled with the allogeneic bone, but the curative effect is not as good as that of the autologous bone transplantation. Filling can also be achieved by local bone flap transfer.
The short and small long bone defects can be completed by adopting conventional operations, such as: autologous bone, allogeneic bone, calcium sulfate, frozen bone and other substitute implant materials are used for repairing bone defects, bone marrow stromal stem cells, different cytokines and the like are added to accelerate the repair of bone defects, and the curative effect on massive bone defects is not satisfactory. Traditional autologous bone grafting is still the most ideal bone grafting material at present, is the 'gold standard' of bone grafting, but is difficult to obtain, and the use of the traditional autologous bone grafting in large-scale bone defects is limited.
Clinically, the shortening of the limb of the lower limb of more than 3cm seriously affects the function, and the treatment is more difficult when the limb of more than 4cm is shortened, so the bone defect has the indication of blood supply and living bone transplantation when the bone defect is more than 4 cm. When the bone defect is larger, or the soft tissue defect and the vascular nerve injury are accompanied, the transplantation operation and the transplantation mode need to be changed greatly. The autologous fibula transplantation with blood vessels and the large-section allogeneic bone transplantation are two more complicated operation types of biological reconstruction, and good results can be obtained once the large-section allogeneic bone can provide mechanical support and is healed with a host bone. However, the large section of the allogeneic bone also has the defects of nonunion, easy infection, fracture caused by late allogeneic bone absorption and the like.
The mixed bone graft and the combined transplantation of the periosteum with blood vessels and the tissue engineered bone also show good prospects and represent the direction of microsurgical treatment of bone defects. However, the tissue engineered bone is still in the experimental stage, so the clinical application is difficult. The study focuses on fuzzy concept description of the size of bone defect, especially on the length and length of bone defect, and the difference is large, and the focus is on the diagnosis and treatment experience and the discussion of the prospect.
Disclosure of Invention
The invention aims to provide an intramedullary bone lengthening auxiliary device which is suitable for reconstructing large-area bone defects.
The solution of the invention for solving the technical problem is as follows:
the utility model provides an intramedullary bone extension auxiliary device, including first main part and second main part, locking nail hole has been put to equipartition in first main part and the second main part, the shaping has the capable chamber of gliding in the first main part, first separation blade has been arranged in the capable chamber of gliding, second separation blade and third separation blade, the second separation blade is located between first separation blade and the third separation blade, form first hydraulic pressure chamber between first separation blade and the second separation blade, form second hydraulic pressure chamber between second separation blade and the third separation blade, the middle part shaping of second separation blade has the second through-hole, first elastic component has been arranged between the diapire in first separation blade and the capable chamber of gliding, the one end and the third separation blade of second main part are connected.
As a further improvement of the technical scheme, the second main body comprises a second connecting part used for connecting the third baffle plate, and a plurality of unidirectional tooth-shaped structures are arranged on the side surface of the second connecting part.
As a further improvement of the technical scheme, the two sides of the second connecting part are respectively provided with a second elastic part, the second elastic parts are arranged on the side wall of the sliding cavity, and one end of each second elastic part is propped against the side surface of the second connecting part.
As a further improvement of the technical scheme, a one-way valve is installed in the second through hole.
As a further improvement of the above technical solution, the first elastic member is a compression spring.
As a further improvement of the above technical solution, the second elastic member is a compression spring.
The invention has the beneficial effects that: inside the medullary cavity that will first main part and second main part be fixed respectively through the locking nail hole, under the effect of first elastic component, push away hydraulic oil to the second hydraulic pressure chamber from first hydraulic pressure chamber through first separation blade, make the second main part remove through the third separation blade, accomplish the process of extension. The invention has reasonable structure and can be widely applied to the technical field of medical instruments.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.
Fig. 1 is a schematic structural view of the present invention, showing the internal structure of the sliding chamber.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions.
Referring to fig. 1, the present invention is an intramedullary bone lengthening assistance device, which includes a first body 10 and a second body 11, and locking nail holes 12 are disposed on both the first body 10 and the second body 11. The first body 10 and the second body 11 are arranged in series, the first body 10 and the second body 11 are respectively fixed inside the medullary cavity through the locking nail holes 12, and the auxiliary device consisting of the first body 10 and the second body 11 can be slowly lengthened after operation. The auxiliary device not only solves the problem of complication of the external fixator for treating the long bone deformity or the defect, but also effectively carries out the long bone deformity, and is well suitable for correcting the long bone deformity and reconstructing the large-area bone defect.
The shaping has the capable chamber of gliding in the first main part 10, first separation blade 13 has been arranged in the capable chamber of gliding, second separation blade 14 and third separation blade 15, second separation blade 14 is located between first separation blade 13 and third separation blade 15, form first hydraulic pressure chamber between first separation blade 13 and the second separation blade 14, form second hydraulic pressure chamber between second separation blade 14 and the third separation blade 15, the middle part shaping of second separation blade 14 has the second through-hole, first elastic component has been arranged between the diapire in first separation blade 13 and the capable chamber of gliding, the one end and the third separation blade 15 of second main part 11 are connected.
First elastic component is compression spring, and under the initial condition, first elastic component is compression state, is equipped with hydraulic oil in the first hydraulic pressure chamber, and along with the extension of first elastic component, first separation blade 13 pushes hydraulic oil to second hydraulic pressure chamber, and third separation blade 15 removes under the effect of hydraulic oil to promote second main part 11 and remove along sliding the chamber, realize the extension. In order to avoid the backflow of the hydraulic oil, a one-way valve is arranged in the second through hole.
The second body 11 comprises a second connecting part for connecting the third baffle 15, a plurality of unidirectional tooth-shaped structures are arranged on the side surface of the second connecting part, and a structure which is correspondingly meshed with the tooth-shaped structures is arranged on the side wall of the opening of the sliding cavity, so that the second body 11 is further prevented from retracting.
And second elastic pieces are respectively arranged on two sides of the second connecting part, the second elastic pieces are arranged on the side wall of the sliding cavity, and one end of each second elastic piece is propped against the side surface of the second connecting part. The second elastic component is a compression spring, and the extension speed of the second main body 11 can be slowed down by the friction force of the end part of the second elastic component to the side surface of the second connecting part, so that the second main body 11 is prevented from being rapidly extended due to the action of the large elastic force of the first elastic component.
The auxiliary device can be used for prolonging the defect of long bones caused by deformity, and can properly add corresponding matched modules according to the condition of patients and the condition in operation after operation to treat the short deformity and the bone defect of different types. Because the auxiliary device belongs to an intramedullary lengthening device, is different from the transportation of an ilizarov external fixation frame bone, can not disturb skin and soft tissues, and can also effectively avoid the defects of deformity lengthening, inconvenient movement and nursing caused by bone block displacement in the lengthening process.
Because the slow extension's of this auxiliary device characteristics, be different from masqueret osteoinduction technique, do not need a large amount of autologous bone to fill, also can effectively avoid the postoperative to appear the bone nonunion.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (4)
1. An intramedullary bone lengthening assistance device, comprising: comprises a first main body (10) and a second main body (11), locking nail holes (12) are uniformly distributed on the first main body (10) and the second main body (11), a sliding cavity is formed in the first main body (10), a first blocking sheet (13), a second blocking sheet (14) and a third blocking sheet (15) are arranged in the sliding cavity, the second blocking sheet (14) is positioned between the first blocking sheet (13) and the third blocking sheet (15), a first hydraulic cavity is formed between the first blocking sheet (13) and the second blocking sheet (14), a second hydraulic cavity is formed between the second blocking sheet (14) and the third blocking sheet (15), a second through hole is formed in the middle of the second blocking sheet (14), a one-way valve is arranged in the second through hole, a first elastic piece is arranged between the first blocking sheet (13) and the bottom wall of the sliding cavity, one end of the second main body (11) is connected with the third blocking sheet (15), the second main body (11) comprises a second connecting part for connecting the third blocking sheet (15), two sides of the second connecting part are respectively provided with a second elastic part, the second elastic parts are arranged on the side wall of the sliding cavity, and one end of each second elastic part props against the side surface of the second connecting part; the first hydraulic pressure chamber is internally provided with hydraulic oil, the first blocking piece (13) pushes the hydraulic oil to the second hydraulic pressure chamber along with the extension of the first elastic piece, and the third blocking piece (15) moves under the action of the hydraulic oil, so that the second main body (11) is pushed to move along the sliding chamber, and the extension is realized.
2. The intramedullary bone lengthening assistance device of claim 1, wherein: the side of the second connecting part is provided with a plurality of unidirectional tooth-shaped structures.
3. The intramedullary bone lengthening assistance device of claim 1, wherein: the first elastic member is a compression spring.
4. The intramedullary bone lengthening assistance device of claim 1, wherein: the second elastic member is a compression spring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910083886.3A CN109700518B (en) | 2019-01-29 | 2019-01-29 | Intramedullary bone extension auxiliary device |
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| CN201910083886.3A CN109700518B (en) | 2019-01-29 | 2019-01-29 | Intramedullary bone extension auxiliary device |
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| CN109700518A CN109700518A (en) | 2019-05-03 |
| CN109700518B true CN109700518B (en) | 2021-11-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5626581A (en) * | 1995-11-27 | 1997-05-06 | Volunteers For Medical Engineering | Implantable bone lengthening apparatus |
| US20050010233A1 (en) * | 2001-11-19 | 2005-01-13 | Manfred Wittenstein | Distraction device |
| CN102271601A (en) * | 2008-10-31 | 2011-12-07 | 米卢克斯控股股份有限公司 | Device and method for bone adjustment operating with wireless transmission energy |
| CN106697270A (en) * | 2015-11-16 | 2017-05-24 | 重庆市锋致科技有限责任公司 | Air vehicle bi-directional damping method |
-
2019
- 2019-01-29 CN CN201910083886.3A patent/CN109700518B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5626581A (en) * | 1995-11-27 | 1997-05-06 | Volunteers For Medical Engineering | Implantable bone lengthening apparatus |
| US20050010233A1 (en) * | 2001-11-19 | 2005-01-13 | Manfred Wittenstein | Distraction device |
| CN102271601A (en) * | 2008-10-31 | 2011-12-07 | 米卢克斯控股股份有限公司 | Device and method for bone adjustment operating with wireless transmission energy |
| CN106697270A (en) * | 2015-11-16 | 2017-05-24 | 重庆市锋致科技有限责任公司 | Air vehicle bi-directional damping method |
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| CN109700518A (en) | 2019-05-03 |
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