CN106344142A - Expandable bone nail convenient to remove and having fastness convenient to adjust - Google Patents
Expandable bone nail convenient to remove and having fastness convenient to adjust Download PDFInfo
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- CN106344142A CN106344142A CN201610712182.4A CN201610712182A CN106344142A CN 106344142 A CN106344142 A CN 106344142A CN 201610712182 A CN201610712182 A CN 201610712182A CN 106344142 A CN106344142 A CN 106344142A
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 92
- 239000003814 drug Substances 0.000 claims abstract description 59
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 230000004888 barrier function Effects 0.000 claims description 6
- 206010017076 Fracture Diseases 0.000 abstract description 8
- 208000010392 Bone Fractures Diseases 0.000 abstract description 7
- 230000035876 healing Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000017074 necrotic cell death Effects 0.000 abstract description 6
- 239000012528 membrane Substances 0.000 abstract description 3
- 210000001185 bone marrow Anatomy 0.000 description 4
- 239000010408 film Substances 0.000 description 3
- 210000000130 stem cell Anatomy 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000399 orthopedic effect Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 208000005189 Embolism Diseases 0.000 description 1
- 208000005422 Foreign-Body reaction Diseases 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8665—Nuts
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M31/00—Devices for introducing or retaining media, e.g. remedies, in cavities of the body
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
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- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
本发明提供了一种方便调节紧固度和取出的膨胀骨钉，包括骨钉本体、辅助钉体和钉帽，所述钉帽固设在所述辅助钉体顶部；所述膨胀骨钉采用骨钉本体和辅助钉体相配合的设置，方便调节所述膨胀骨钉的紧固度，同时，在所述药液腔内存放有药液，在将所述辅助钉体旋入所述骨钉本体的过程中，压迫所述药液腔，使其中的药液挤破薄膜，注入患者的骨中，起到促进骨折愈合和预防股骨头坏死的作用；另外，在使用状态时，所述本体弹簧处于收缩状态，在需要拆卸所述膨胀骨钉时，所述本体弹簧能够提供给所述骨钉本体向上的推力，方便所述骨钉本体拆卸。
The present invention provides an expansible bone screw that is convenient to adjust the fastening degree and take out, comprising a bone screw body, an auxiliary nail body and a nail cap, the nail cap is fixed on the top of the auxiliary nail body; The cooperating setting of the bone nail body and the auxiliary nail body facilitates the adjustment of the fastening degree of the expanded bone nail. During the process of nailing the main body, the liquid medicine cavity is pressed, the liquid medicine in it is squeezed out of the membrane, and injected into the patient's bone, so as to promote fracture healing and prevent femoral head necrosis; in addition, in the state of use, the The body spring is in a contracted state, and when the expansion screw needs to be disassembled, the body spring can provide an upward thrust to the bone screw body to facilitate the removal of the bone screw body.
Description
技术领域technical field
本发明属于骨科手术用器械技术领域，具体涉及一种方便调节紧固度和取出的膨胀骨钉。The invention belongs to the technical field of instruments for orthopedic surgery, and in particular relates to an expandable bone nail that is convenient for adjusting the fastening degree and taking out.
背景技术Background technique
骨钉是用于将连接板等辅助固定部件与患者的骨骼连接，以治疗骨折、骨骼变形等疾病的医疗器械。在患者伤愈之后一般要取出骨钉，以避免异物反应或者是骨髓感染。Bone nails are medical devices used to connect auxiliary fixation components such as connecting plates with the patient's bones to treat fractures, bone deformations and other diseases. The bone nails are generally removed after the patient has recovered to avoid foreign body reactions or bone marrow infection.
现有骨钉中存在以下缺陷：骨钉的松动问题是骨科手术中的一大难题。在植入人体骨骼中后，骨钉会因为骨骼的生长和其他外力的作用下逐渐产生位移甚至脱落，极大影响了对连接板等辅助固定部件的固定作用。The following defects exist in the existing bone nails: the loosening of the bone nails is a major problem in orthopedic surgery. After being implanted in the human bone, the bone nail will gradually displace or even fall off due to the growth of the bone and other external forces, which greatly affects the fixing effect on the auxiliary fixing parts such as the connecting plate.
针对上述缺陷，申请号为CN201210533888.6的发明专利提供了一种螺纹非连续可拆卸膨胀骨钉，设置了外壁的螺纹方向相反的两螺纹条，无论整个骨钉在外力作用下需要向哪个方向转动，都会受到反方向螺纹的阻力，因此起到了防松动的作用，提高了骨钉的固定效果。但是，上述发明在安装时操作繁复，同时难以拆卸，给医护人员带来极大地不便。In view of the above-mentioned defects, the invention patent with the application number CN201210533888.6 provides a discontinuous threaded detachable expandable bone screw, which is provided with two thread strips with opposite thread directions on the outer wall. Rotation will be resisted by the thread in the opposite direction, so it plays a role in preventing loosening and improves the fixing effect of the bone screw. However, the above-mentioned invention is complicated to operate during installation and difficult to disassemble, which brings great inconvenience to medical staff.
另外，现有的骨钉的结构和功能较为单一，往往只有固定连接板等辅助固定部件的作用，针对于此，申请号为CN201320609668.7的实用新型提供一种新型空心骨钉，所述骨钉体内设置药液腔，在药液腔中注入骨髓干细胞，骨髓干细胞通过骨钉体上的渗透孔进入骨折端和股骨头，促进骨折愈合和预防股骨头坏死。但是上述实用新型使用栓子对所述药液腔进行密封，易导致骨髓干细胞或其他药液的变质，从而影响治疗效果。In addition, the structure and function of the existing bone nails are relatively simple, and often only have the function of fixing the auxiliary fixing parts such as the connecting plate. For this, the utility model with the application number of CN201320609668.7 provides a new type of hollow bone nail. A medicine solution cavity is set in the nail body, and bone marrow stem cells are injected into the medicine solution cavity, and the bone marrow stem cells enter the fracture end and the femoral head through the penetration holes on the bone nail body, so as to promote fracture healing and prevent femoral head necrosis. However, the above-mentioned utility model uses an embolus to seal the liquid medicine cavity, which may easily lead to deterioration of bone marrow stem cells or other liquid medicines, thus affecting the therapeutic effect.
发明内容Contents of the invention
为了解决现有技术存在的上述问题，本发明提供了一种方便调节紧固度和取出的膨胀骨钉，所述膨胀骨钉采用骨钉本体和辅助钉体相配合的设置，方便调节所述膨胀骨钉的紧固度，同时，在所述药液腔内存放有药液，在将所述辅助钉体旋入所述骨钉本体的过程中，压迫所述药液腔，使其中的药液挤破薄膜，注入患者的骨中，起到促进骨折愈合和预防股骨头坏死的作用。In order to solve the above-mentioned problems existing in the prior art, the present invention provides an expansion bone screw that is convenient to adjust the fastening degree and take out. The tightness of the bone screw is expanded, and at the same time, the liquid medicine is stored in the liquid medicine cavity. During the process of screwing the auxiliary nail body into the nail body, the liquid medicine cavity is pressed to make the liquid medicine therein The medicinal solution breaks the membrane and is injected into the patient's bone to promote fracture healing and prevent femoral head necrosis.
本发明所采用的技术方案为：一种方便调节紧固度和取出的膨胀骨钉，包括骨钉本体和辅助钉体，所述骨钉本体上开设有竖直方向的通孔，所述通孔与所述辅助钉体的底端过盈配合，所述通孔的内壁上设有第一螺纹，所述辅助钉体底端的外表面上设有第二螺纹，所述第一螺纹和第二螺纹相啮合；所述骨钉本体的底部开设有药液腔，所述药液腔的开口使用薄膜封口；所述药液腔与所述通孔的原始体积之和小于所述辅助钉体旋入所述通孔的体积；The technical solution adopted in the present invention is: an expansible bone screw that is convenient to adjust the fastening degree and take out, including a bone screw body and an auxiliary nail body, the bone screw body is provided with a vertical through hole, and the through hole The hole is in interference fit with the bottom end of the auxiliary nail body, the inner wall of the through hole is provided with a first thread, the outer surface of the bottom end of the auxiliary nail body is provided with a second thread, and the first thread and the second thread are arranged on the outer surface of the auxiliary nail body. The two threads are engaged; the bottom of the bone nail body is provided with a liquid medicine cavity, and the opening of the liquid medicine cavity is sealed with a film; the sum of the original volume of the liquid medicine cavity and the through hole is smaller than the auxiliary nail body the volume screwed into said through hole;
所述骨钉本体的上部向水平方向延伸出本体侧翼，所述本体侧翼的底部设有竖直方向的本体定位柱，所述本体定位柱上设有刻度；所述本体侧翼的底部还设有多根竖直方向的本体弹簧，多根本体弹簧均匀设置在所述通孔的周围，所述本体弹簧的一端固设在所述本体侧翼的底部，所述本体弹簧的另一端为自由端，且所述本体弹簧的自然长度长于所述骨钉本体在竖直方向的长度；The upper part of the bone nail body extends out of the body side wings in the horizontal direction, and the bottom of the body side wings is provided with a vertical body positioning column, and the body positioning column is provided with a scale; the bottom of the body side wing is also provided with A plurality of body springs in the vertical direction, the plurality of body springs are evenly arranged around the through hole, one end of the body spring is fixed on the bottom of the body side wing, and the other end of the body spring is a free end, And the natural length of the body spring is longer than the length of the bone screw body in the vertical direction;
所述辅助钉体的上部向水平方向延伸出辅助侧翼，所述辅助侧翼的底部设有竖直方向的辅助定位柱，所述辅助定位柱上设有刻度，所述辅助侧翼的底部还设有多根竖直方向的辅助弹簧，多根辅助弹簧均匀设置在所述辅助钉体竖直方向轴线的周围，所述辅助弹簧的一端固设在所述辅助侧翼的底部，所述辅助弹簧的另一端固设在所述本体侧翼的顶部，且所述辅助弹簧的自然长度短于所述辅助侧翼和本体侧翼在竖直方向上的距离。The top of the auxiliary nail body extends out auxiliary wings in the horizontal direction, the bottom of the auxiliary wings is provided with auxiliary positioning columns in the vertical direction, the auxiliary positioning columns are provided with scales, and the bottom of the auxiliary wings is also provided with A plurality of auxiliary springs in the vertical direction are uniformly arranged around the vertical axis of the auxiliary nail body, one end of the auxiliary spring is fixed at the bottom of the auxiliary wing, and the other end of the auxiliary spring One end is fixed on the top of the body side wing, and the natural length of the auxiliary spring is shorter than the vertical distance between the auxiliary side wing and the body side wing.
所述膨胀骨钉采用骨钉本体和辅助钉体相配合的设置，方便调节所述膨胀骨钉的紧固度，同时，在所述药液腔内存放有药液，在将所述辅助钉体旋入所述骨钉本体的过程中，压迫所述药液腔，使其中的药液挤破薄膜，注入患者的骨中，起到促进骨折愈合和预防股骨头坏死的作用；另外，所述药液腔与所述通孔的原始体积之和小于所述辅助钉体旋入所述通孔的体积，所述药液腔与所述通孔的原始体积为所述辅助钉体未旋入所述通孔时，所述药液腔与所述通孔在自然状态下的体积；也就是说，随着所述辅助钉体的旋入，所述通孔被撑大，同时积压所述药液腔，但即使将所述药液腔中的药液全部挤出，所述药液腔的空间被完全压缩，所述辅助钉体和所述骨钉本体还是过盈配合的，从而保证了紧固度。The expansion bone nail adopts the matching setting of the bone nail body and the auxiliary nail body, which is convenient for adjusting the fastening degree of the expansion bone screw. In the process of screwing the body into the bone nail body, it presses the liquid medicine cavity, so that the liquid medicine therein breaks through the film and is injected into the patient's bone, so as to promote fracture healing and prevent femoral head necrosis; in addition, the The sum of the original volumes of the liquid medicine cavity and the through hole is less than the volume of the auxiliary nail body screwed into the through hole, and the original volume of the liquid medicine cavity and the through hole is that the auxiliary nail body is not screwed. When entering the through hole, the volume of the liquid medicine cavity and the through hole in the natural state; that is to say, with the screwing of the auxiliary nail body, the through hole is enlarged, and the However, even if all the liquid medicine in the liquid medicine chamber is squeezed out, the space of the liquid medicine chamber is completely compressed, and the auxiliary nail body and the bone nail body still have an interference fit, thus Tightness is guaranteed.
另外，所述本体定位柱上设有刻度，使用者能够根据刻度对所述骨钉本体相对于患者骨骼或者连接板等辅助固定部件的相对位置进行确定，从而得到更精确的植入位置；所述本体弹簧的自然长度长于所述骨钉本体竖直方向的长度，也就是说，在使用状态时，所述本体弹簧处于收缩状态，在需要拆卸所述膨胀骨钉时，所述本体弹簧能够提供给所述骨钉本体向上的推力，方便所述骨钉本体拆卸。In addition, the body positioning column is provided with a scale, and the user can determine the relative position of the bone nail body relative to the auxiliary fixation components such as the patient's bone or connecting plate according to the scale, so as to obtain a more accurate implantation position; The natural length of the body spring is longer than the length of the bone screw body in the vertical direction, that is to say, when in use, the body spring is in a contracted state, and when the expansion screw needs to be disassembled, the body spring can An upward thrust is provided to the bone screw body to facilitate disassembly of the bone screw body.
与之对应的，所述辅助定位柱上也设有刻度，使用者能够根据刻度直接确定所述辅助钉体旋入所述骨钉本体的深度，从而得到更精确的旋入深度；所述辅助弹簧的自然长度短于所述辅助侧翼和本体侧翼在竖直方向上的距离，也就是说，在使用状态时，所述辅助弹簧处于拉伸状态，所述辅助弹簧会一直给所述骨钉本体和辅助钉体提供相向的作用力，保证辅助钉体旋入的深度，进而保证了紧固度。Correspondingly, a scale is also provided on the auxiliary positioning column, and the user can directly determine the depth at which the auxiliary nail body is screwed into the bone screw body according to the scale, so as to obtain a more accurate screw-in depth; The natural length of the spring is shorter than the vertical distance between the auxiliary wing and the main body side wing, that is to say, when in use, the auxiliary spring is in a stretched state, and the auxiliary spring will always give the bone nail The main body and the auxiliary nail body provide opposing forces to ensure the screwing depth of the auxiliary nail body, thereby ensuring the tightness.
本发明提供的膨胀骨钉，可以采用现有技术中，骨钉通常采用的钛合金或其他金属材料制成，在被挤压时能够产生一定的形变，保证所述药液腔内存放的药液被顺利挤出。The expandable bone nail provided by the present invention can be made of titanium alloy or other metal materials commonly used in bone nails in the prior art, and can produce a certain deformation when being squeezed to ensure that the medicine stored in the medicine liquid cavity The liquid was squeezed out smoothly.
为便于积压所述药液腔，优选的技术方案是，所述通孔和所述药液腔之间通过隔挡部隔开，所述隔挡部采用医用塑料制成。In order to facilitate the accumulation of the liquid medicine chamber, the preferred technical solution is that the through hole and the liquid medicine chamber are separated by a barrier, and the barrier is made of medical plastic.
为保证所述药液腔的密闭性，优选的技术方案是，所述药液腔的开口处设有单向阀，所述单向阀的流通方向为从上向下流通。In order to ensure the airtightness of the liquid medicine chamber, a preferred technical solution is that a one-way valve is provided at the opening of the liquid medicine chamber, and the flow direction of the one-way valve is from top to bottom.
为方便旋转所述辅助钉体，优选的技术方案是，所述膨胀骨钉还包括固设在所述辅助钉体顶部的钉帽，In order to facilitate the rotation of the auxiliary nail body, the preferred technical solution is that the expansion bone screw also includes a nail cap fixed on the top of the auxiliary nail body,
所述钉帽的侧壁上设有防滑纹；或者，所述钉帽的顶部开设有一字型、十字形或正六边形凹槽。The side wall of the nail cap is provided with anti-slip lines; or, the top of the nail cap is provided with a font, cross or regular hexagonal groove.
所述防滑纹用于直接旋转钉帽；开设在所述钉帽上不同形状的凹槽，分别对应不同形状的改锥或内六角扳手。The anti-slip pattern is used to directly rotate the nut; grooves of different shapes are provided on the nut, corresponding to screwdrivers or hexagonal wrenches of different shapes.
为进一步方便使用，优选的技术方案是，所述本体定位柱和辅助定位柱均采用塑料制成，设置在所述本体定位柱和辅助定位柱上的刻度为均匀设置的多个凹槽。在使用时，先计算好所述本体定位柱和辅助定位柱的长度，直接将本体定位柱和辅助定位柱的多余部分从刻度处掰断或剪断，从而在使用时，直接将所述本体定位柱的底端与患者骨骼或者连接板等辅助固定部件相抵；将所述辅助定位柱的底端与所述本体侧翼的顶部相抵，从而起到定位的作用，方面使用。For further convenience, the preferred technical solution is that both the main body positioning post and the auxiliary positioning post are made of plastic, and the scales arranged on the main body positioning post and the auxiliary positioning post are a plurality of uniformly arranged grooves. When in use, first calculate the length of the main body positioning post and the auxiliary positioning post, and directly break or cut off the excess part of the main body positioning post and the auxiliary positioning post from the scale, so that the main body positioning post can be directly positioned when in use. The bottom end of the column is against the auxiliary fixing parts such as the patient's bone or connecting plate; the bottom end of the auxiliary positioning column is against the top of the side wing of the body, so as to play the role of positioning and convenient use.
为保证在所述辅助钉体旋入骨钉本体时的受力平衡，所述根据本发明的一个实施例，所述药液腔的数目为两个，两个所述药液腔对称设置在所述通孔的两侧。所述本体弹簧和辅助弹簧的数目均为两个。In order to ensure the force balance when the auxiliary nail body is screwed into the bone screw body, according to an embodiment of the present invention, the number of the liquid medicine chambers is two, and the two liquid medicine chambers are arranged symmetrically on the on both sides of the through hole. There are two body springs and two auxiliary springs.
需要说明的是，在本发明中，关于方位地描述，以“在所述膨胀骨钉使用时，患者骨骼或者连接板等辅助固定部件为水平面，所述所述膨胀骨钉竖直设置与患者骨骼或者连接板等辅助固定部件的上方”所描述的方向为准。It should be noted that, in the present invention, the orientation is described as "when the expansion nail is used, the patient's bone or connecting plate and other auxiliary fixation components are on the horizontal plane, and the expansion nail is vertically arranged with the patient. The direction described in "Above the auxiliary fixation parts such as bones or connecting plates" shall prevail.
本发明的有益效果为：The beneficial effects of the present invention are:
1、本发明提供了一种方便调节紧固度和取出的膨胀骨钉，所述膨胀骨钉采用骨钉本体和辅助钉体相配合的设置，方便调节所述膨胀骨钉的紧固度，同时，在所述药液腔内存放有药液，在将所述辅助钉体旋入所述骨钉本体的过程中，压迫所述药液腔，使其中的药液挤破薄膜，注入患者的骨中，起到促进骨折愈合和预防股骨头坏死的作用；另外，所述药液腔与所述通孔的原始体积之和小于所述辅助钉体旋入所述通孔的体积，也就是说，即使将所述药液腔中的药液全部挤出，所述药液腔的空间被完全压缩，所述辅助钉体和所述骨钉本体还是过盈配合的，从而保证了紧固度；另外，在使用状态时，所述本体弹簧处于收缩状态，在需要拆卸所述膨胀骨钉时，所述本体弹簧能够提供给所述骨钉本体向上的推力，方便所述骨钉本体拆卸。1. The present invention provides an expansive bone screw that is convenient to adjust the fastening degree and take out. The expansive bone nail adopts the matching setting of the bone screw body and the auxiliary nail body to facilitate the adjustment of the fastening degree of the expansive bone screw. At the same time, there is liquid medicine stored in the liquid medicine cavity, and during the process of screwing the auxiliary nail body into the bone nail body, the liquid medicine cavity is pressed so that the liquid medicine therein breaks the membrane and is injected into the patient. In the bone, it plays a role in promoting fracture healing and preventing femoral head necrosis; in addition, the sum of the original volume of the liquid medicine chamber and the through hole is smaller than the volume of the auxiliary nail body screwed into the through hole, and also That is to say, even if all the liquid medicine in the liquid medicine chamber is squeezed out and the space of the liquid medicine chamber is completely compressed, the auxiliary nail body and the bone nail body still have an interference fit, thereby ensuring a tight fit. In addition, in the state of use, the body spring is in a contracted state. When the expansion screw needs to be disassembled, the body spring can provide an upward thrust to the bone screw body, which facilitates the expansion of the bone screw body. Disassemble.
2、与本体定位柱对应的，所述辅助定位柱上也设有刻度，使用者能够根据刻度直接确定所述辅助钉体旋入所述骨钉本体的深度，从而得到更精确的旋入深度；所述辅助弹簧的自然长度短于所述辅助侧翼和本体侧翼在竖直方向上的距离，也就是说，在使用状态时，所述辅助弹簧处于拉伸状态，所述辅助弹簧会一直给所述骨钉本体和辅助钉体提供相向的作用力，保证辅助钉体旋入的深度，进而进一步保证了紧固度。2. Corresponding to the body positioning column, the auxiliary positioning column is also provided with a scale, and the user can directly determine the depth of the auxiliary nail body screwed into the bone screw body according to the scale, so as to obtain a more accurate screw-in depth ; The natural length of the auxiliary spring is shorter than the distance between the auxiliary wing and the body side wing in the vertical direction, that is to say, when in use, the auxiliary spring is in a stretched state, and the auxiliary spring will always give The bone screw body and the auxiliary nail body provide opposing forces to ensure the screwing depth of the auxiliary nail body, thereby further ensuring the fastness.
3、所述本体定位柱和辅助定位柱均采用塑料制成，设置在所述本体定位柱和辅助定位柱上的刻度为均匀设置的多个凹槽。在使用时，先计算好所述本体定位柱和辅助定位柱的长度，直接将本体定位柱和辅助定位柱的多余部分从刻度处掰断或剪断，从而在使用时，直接将所述本体定位柱的底端与患者骨骼或者连接板等辅助固定部件相抵；将所述辅助定位柱的底端与所述本体侧翼的顶部相抵，从而起到定位的作用，方面使用。3. Both the main body positioning post and the auxiliary positioning post are made of plastic, and the scales set on the main body positioning post and the auxiliary positioning post are multiple grooves arranged evenly. When in use, first calculate the length of the main body positioning post and the auxiliary positioning post, and directly break or cut off the excess part of the main body positioning post and the auxiliary positioning post from the scale, so that the main body positioning post can be directly positioned when in use. The bottom end of the column is against the auxiliary fixing parts such as the patient's bone or connecting plate; the bottom end of the auxiliary positioning column is against the top of the side wing of the body, so as to play the role of positioning and convenient use.
附图说明Description of drawings
图1是本发明中实施例的的剖视图。Fig. 1 is a sectional view of an embodiment of the present invention.
图中：1、骨钉本体；11、通孔；12、药液腔；13、本体侧翼；14、本体定位柱；15、本体弹簧；16、隔挡部；17、单向阀；2、辅助钉体；21、辅助侧翼；22、辅助定位柱；23、辅助弹簧；3、钉帽。In the figure: 1, bone nail body; 11, through hole; 12, liquid medicine cavity; 13, body flank; 14, body positioning post; 15, body spring; 16, barrier; 17, one-way valve; 2, Auxiliary nail body; 21, auxiliary flank; 22, auxiliary positioning post; 23, auxiliary spring; 3, nail cap.
具体实施方式detailed description
如图1所示，本发明提供了一种方便调节紧固度和取出的膨胀骨钉，包括骨钉本体1、辅助钉体2和钉帽3，所述钉帽3固设在所述辅助钉体2顶部；所述骨钉本体1上开设有竖直方向的通孔11，所述通孔11与所述辅助钉体2的底端过盈配合，所述通孔11的内壁上设有第一螺纹，所述辅助钉体2底端的外表面上设有第二螺纹，所述第一螺纹和第二螺纹相啮合；所述骨钉本体1的底部开设有药液腔12，所述药液腔12的数目为两个，两个所述药液腔12对称设置在所述通孔11的两侧；所述药液腔12的开口使用薄膜封口；所述药液腔12的开口处设有单向阀17，所述单向阀17的流通方向为从上向下流通，所述通孔11和所述药液腔12之间通过隔挡部16隔开，所述隔挡部16采用医用塑料制成；所述药液腔12与所述通孔11的原始体积之和小于所述辅助钉体2旋入所述通孔11的体积；As shown in Figure 1, the present invention provides an expansible bone screw that is convenient to adjust the fastening degree and take out, including a bone screw body 1, an auxiliary nail body 2 and a nail cap 3, and the nail cap 3 is fixed on the auxiliary nail body. The top of the nail body 2; the bone nail body 1 is provided with a vertical through hole 11, the through hole 11 is in interference fit with the bottom end of the auxiliary nail body 2, and the inner wall of the through hole 11 is provided with There is a first thread, and the outer surface of the bottom end of the auxiliary nail body 2 is provided with a second thread, and the first thread and the second thread are engaged; the bottom of the bone nail body 1 is provided with a liquid medicine chamber 12, so that The number of the liquid medicine chamber 12 is two, and the two liquid medicine chambers 12 are symmetrically arranged on both sides of the through hole 11; the opening of the liquid medicine chamber 12 is sealed with a film; A one-way valve 17 is provided at the opening, and the flow direction of the one-way valve 17 is from top to bottom, and the through hole 11 and the liquid medicine chamber 12 are separated by a barrier 16. The blocking part 16 is made of medical plastic; the sum of the original volume of the liquid medicine cavity 12 and the through hole 11 is smaller than the volume of the auxiliary nail body 2 screwed into the through hole 11;
所述骨钉本体1的上部向水平方向延伸出本体侧翼13，所述本体侧翼13的底部设有竖直方向的本体定位柱14，所述本体定位柱14上设有刻度，所述本体定位柱14采用塑料制成，设置在所述本体定位柱14和辅助定位柱22上的刻度为均匀设置的多个凹槽；所述本体侧翼13的底部还设有两根竖直方向的本体弹簧15，两根本体弹簧15对称设置在所述通孔11的两侧，所述本体弹簧15的一端固设在所述本体侧翼13的底部，所述本体弹簧15的另一端为自由端，且所述本体弹簧15的自然长度长于所述骨钉本体1在竖直方向的长度；The upper part of the bone nail body 1 extends out of the body side wings 13 in the horizontal direction, and the bottom of the body side wings 13 is provided with a body positioning column 14 in a vertical direction, and the body positioning column 14 is provided with a scale, and the body positioning column 14 is provided with a scale. The column 14 is made of plastic, and the scales arranged on the body positioning column 14 and the auxiliary positioning column 22 are a plurality of grooves arranged evenly; the bottom of the body wing 13 is also provided with two vertical body springs 15. Two body springs 15 are symmetrically arranged on both sides of the through hole 11, one end of the body spring 15 is fixed at the bottom of the body wing 13, the other end of the body spring 15 is a free end, and The natural length of the body spring 15 is longer than the length of the bone screw body 1 in the vertical direction;
所述辅助钉体2的上部向水平方向延伸出辅助侧翼21，所述辅助侧翼21的底部设有竖直方向的辅助定位柱22，所述辅助定位柱22上设有刻度，所述辅助定位柱22采用塑料制成，设置在所述本体定位柱14和辅助定位柱22上的刻度为均匀设置的多个凹槽；所述辅助侧翼21的底部还设有两根竖直方向的辅助弹簧23，两根辅助弹簧23对称设置在所述辅助钉体2竖直方向轴线的两侧，所述辅助弹簧23的一端固设在所述辅助侧翼21的底部，所述辅助弹簧23的另一端固设在所述本体侧翼13的顶部，且所述辅助弹簧23的自然长度短于所述辅助侧翼21和本体侧翼13在竖直方向上的距离。The top of described auxiliary nail body 2 extends out auxiliary flank 21 to horizontal direction, and the bottom of described auxiliary flank 21 is provided with the auxiliary positioning column 22 of vertical direction, and described auxiliary positioning column 22 is provided with scale, and described auxiliary positioning The column 22 is made of plastic, and the scales arranged on the body positioning column 14 and the auxiliary positioning column 22 are multiple grooves arranged evenly; the bottom of the auxiliary wing 21 is also provided with two auxiliary springs in the vertical direction 23. Two auxiliary springs 23 are symmetrically arranged on both sides of the vertical axis of the auxiliary nail body 2, one end of the auxiliary spring 23 is fixed on the bottom of the auxiliary wing 21, and the other end of the auxiliary spring 23 It is fixed on the top of the body side wing 13 , and the natural length of the auxiliary spring 23 is shorter than the vertical distance between the auxiliary side wing 21 and the body side wing 13 .
所述钉帽3的侧壁上设有防滑纹；或者，所述钉帽3的顶部开设有一字型、十字形或正六边形凹槽。所述防滑纹用于直接旋转钉帽3；开设在所述钉帽3上不同形状的凹槽，分别对应不同形状的改锥或内六角扳手。The sidewall of the nail cap 3 is provided with anti-slip lines; or, the top of the nail cap 3 is provided with a font, cross or regular hexagonal groove. The anti-skid pattern is used to directly rotate the nut 3; grooves of different shapes are provided on the nut 3, corresponding to screwdrivers or hexagonal wrenches of different shapes.
本发明提供了一种方便调节紧固度和取出的膨胀骨钉，所述膨胀骨钉采用骨钉本体1和辅助钉体2相配合的设置，方便调节所述膨胀骨钉的紧固度，同时，在所述药液腔12内存放有药液，在将所述辅助钉体2旋入所述骨钉本体1的过程中，压迫所述药液腔12，使其中的药液挤破薄膜，注入患者的骨中，起到促进骨折愈合和预防股骨头坏死的作用；另外，所述药液腔12与所述通孔11的原始体积之和小于所述辅助钉体2旋入所述通孔11的体积，也就是说，即使将所述药液腔12中的药液全部挤出，所述药液腔12的空间被完全压缩，所述辅助钉体2和所述骨钉本体1还是过盈配合的，从而保证了紧固度；另外在使用状态时，所述本体弹簧15处于收缩状态，在需要拆卸所述膨胀骨钉时，所述本体弹簧15能够提供给所述骨钉本体1向上的推力，方便所述骨钉本体1拆卸。The present invention provides an expansive bone screw that is convenient to adjust the fastening degree and take out. The expansive bone screw adopts the matching setting of the bone screw body 1 and the auxiliary nail body 2, so as to facilitate the adjustment of the fastening degree of the expansive bone screw. At the same time, there is liquid medicine stored in the liquid medicine cavity 12, and during the process of screwing the auxiliary nail body 2 into the bone nail body 1, the liquid medicine cavity 12 is pressed to make the liquid medicine in it burst. The thin film is injected into the bone of the patient to promote fracture healing and prevent necrosis of the femoral head; in addition, the sum of the original volumes of the liquid medicine chamber 12 and the through hole 11 is smaller than the volume of the auxiliary nail body 2 screwed in. The volume of the above-mentioned through hole 11, that is to say, even if all the liquid medicine in the liquid medicine chamber 12 is squeezed out, the space of the liquid medicine chamber 12 is completely compressed, and the auxiliary nail body 2 and the bone nail The main body 1 is also an interference fit, thereby ensuring tightness; in addition, when in use, the main body spring 15 is in a contracted state, and when the expansion screw needs to be disassembled, the main body spring 15 can provide the The upward thrust of the bone screw body 1 facilitates the disassembly of the bone screw body 1 .
在使用时，先计算好所述本体定位柱14和辅助定位柱22的长度，直接将本体定位柱14和辅助定位柱22的多余部分从刻度处掰断或剪断，从而在使用时，直接将所述本体定位柱14的底端与患者骨骼或者连接板等辅助固定部件相抵；将所述辅助定位柱22的底端与所述本体侧翼13的顶部相抵，从而起到定位的作用，方面使用。When in use, first calculate the length of the main body positioning post 14 and the auxiliary positioning post 22, and directly break off or cut off the redundant parts of the main body positioning post 14 and the auxiliary positioning post 22 from the scale, so that when in use, directly The bottom end of the body positioning column 14 abuts against auxiliary fixing components such as the patient's bone or connecting plate; .
最后所应说明的是，以上实施例仅用以说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，所应理解的是，以上所述仅为本发明的具体实施方式而已，并不用于限定本发明的保护范围，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not limit them. Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above descriptions are only limitations of the present invention. It is only a specific embodiment, and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610712182.4A CN106344142A (en) | 2016-08-23 | 2016-08-23 | Expandable bone nail convenient to remove and having fastness convenient to adjust |
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| CN201610712182.4A CN106344142A (en) | 2016-08-23 | 2016-08-23 | Expandable bone nail convenient to remove and having fastness convenient to adjust |
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| CN106344142A true CN106344142A (en) | 2017-01-25 |
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| CN201610712182.4A Pending CN106344142A (en) | 2016-08-23 | 2016-08-23 | Expandable bone nail convenient to remove and having fastness convenient to adjust |
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Effective date of registration: 20190215 Address after: No. 28 Fuxing Road, Haidian District, Beijing 100089 Applicant after: General Hospital of Chinese PLA Address before: No. 28 Fuxing Road, Haidian District, Beijing 100000 Applicant before: Hao Libo |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170125 |