WO2016041249A1 - 一种加长型微创空心椎弓根螺钉 - Google Patents

一种加长型微创空心椎弓根螺钉 Download PDF

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Publication number
WO2016041249A1
WO2016041249A1 PCT/CN2014/092033 CN2014092033W WO2016041249A1 WO 2016041249 A1 WO2016041249 A1 WO 2016041249A1 CN 2014092033 W CN2014092033 W CN 2014092033W WO 2016041249 A1 WO2016041249 A1 WO 2016041249A1
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Prior art keywords
nail
slot
cap
pedicle screw
minimally invasive
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PCT/CN2014/092033
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English (en)
French (fr)
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陶凯
余强
方华
徐崧崧
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常州市康辉医疗器械有限公司
陶凯
余强
方华
徐崧崧
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Application filed by 常州市康辉医疗器械有限公司, 陶凯, 余强, 方华, 徐崧崧 filed Critical 常州市康辉医疗器械有限公司
Publication of WO2016041249A1 publication Critical patent/WO2016041249A1/zh

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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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • 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
    • A61B17/68—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
    • 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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
    • 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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
    • A61B17/7091—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for applying, tightening or removing longitudinal element-to-bone anchor locking elements, e.g. caps, set screws, nuts or wedges
    • 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
    • A61B17/68—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
    • 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
    • A61B17/68—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
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A61B17/863—Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
    • 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
    • A61B17/68—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
    • A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
    • 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
    • A61B17/68—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

Definitions

  • the invention relates to an extended type minimally invasive hollow pedicle screw, which relates to the technical field of surgical medical instruments, in particular to a minimally invasive hollow pedicle screw with a protective sleeve for spinal correction and internal fixation.
  • minimally invasive techniques have developed rapidly in spinal surgery.
  • the common operation is convenient for installation, opening to the operation surface, large surgical trauma, slow healing, and easy to cause complications of the wound surface, and minimally invasive refers to achieving optimal surgical treatment with minimal invasion and minimal physiological interference.
  • a major feature of surgery or examination is the miniaturization of the wound.
  • Surgery as a planned trauma the surgeon should strive to minimize the trauma of the operation and achieve minimally invasive purposes.
  • Minimally invasive surgery reduces surgical time, reduces the incidence of complications, reduces intraoperative tissue damage and hemorrhage, shortens patient recovery time, and reduces surgical pain.
  • the object of the present invention is to provide an elongated minimally invasive hollow pedicle screw for the above-mentioned deficiencies, an elongated minimally invasive hollow pedicle screw cap and a long sleeve and a surgical tool for percutaneous entry into the tissue, and the wound is small.
  • the cross-sectional area of the wound is greatly reduced; the lengthening of the minimally invasive hollow pedicle screw cap and the long sleeve of the lumbar groove matching surgical tool can be lifted and reset in vitro, and also The surgical tool cooperates with the breaking function, and the upper end of the U-shaped groove of the elongated minimally invasive hollow pedicle screw cap is provided with a protective sheet, which can ensure the shape of the product is not deformed during product transportation.
  • An extended type minimally invasive hollow pedicle screw consists of a nail cap, a nail body and a compression washer, and the upper part of the nail body Installed in the cap and fixed by the compression washer limit.
  • the nail cap is provided with a nail base and an elongated sleeve.
  • the nail base and the extension sleeve are integrally formed, and a wedge groove is arranged between the nail seat and the extension sleeve to be broken during the operation; the both sides of the nail cap are provided with a waist groove.
  • the waist groove is composed of a lifting reset slot, a breaking tool slot and a breaking tool insertion slot, and the lifting reset slot, the breaking tool slot and the breaking tool insertion slot are respectively connected for pulling reset, breaking tool insertion and nail cap Long break break; U-shaped groove on the other two sides of the nail cap, convenient rod placement during operation; protective sheet on the upper end of the U-shaped groove, which can protect the nail cap from deformation during the transportation process, protect the piece and lengthen
  • the sleeves are connected by short ribs, which are easy to break during operation; the inner wall of the lower part of the nail cap is provided with internal threads, and the nail body adopts a hollow design.
  • the minimally invasive operation is performed by the tube expansion system, the guide needle is inserted at the corresponding part of the implanted nail body, and the screw is mounted to the corresponding position according to the previously inserted guide needle through the hollow surgical tool, after which Evacuate the tube expansion system, according to the actual situation of the operation, use the corresponding surgical tools to choose to break the protective piece, put the rod into the rod through the U-shaped groove, and then screw in the matching screw plug, then use the corresponding surgical tool and waist according to the actual situation during the operation. After the lifting and resetting groove in the groove is matched, the spine can be pulled and reset, so that the pedicle screw and the inner fixing rod are in good contact.
  • the corresponding breaking tool can be inserted into the breaking tool insertion slot in the waist groove, and then the broken tool slot in the waist groove is used to break the lengthened portion, which is convenient to operate and suitable for operation. It is safe and effective for orthopedic and repositioning of the spine.
  • the waist-shaped groove matching surgical tool of the elongated minimally invasive hollow pedicle screw cap and the long sleeve can be pulled and reset in vitro, and also plays a role of breaking with the surgical tool;
  • the invention discloses a long-type minimally invasive hollow pedicle screw body thread double-head variable diameter design, which can increase the holding force of the screw and the nail insertion speed is fast;
  • the elongated minimally invasive hollow pedicle screw body is a hollow design, and a hollow tool can be attached to the corresponding portion along the previous guide pin.
  • Figure 1 is a front elevational view of an elongated minimally invasive hollow pedicle screw structure.
  • Figure 2 is a left side elevational view of the structure of an elongated minimally invasive hollow pedicle screw.
  • Fig. 3 is a front elevational view showing the structure of an elongated minimally invasive hollow pedicle screw compression washer.
  • the reference numerals in the drawings are: 1, nail cap, 11, U-shaped groove, 12, nail seat, 13, internal thread one, 14, cylindrical one, 15, groove one, 16, slot two, 17, spherical cup one , 18, through hole one, 19, lengthening sleeve, 110, waist groove, 1101, lifting reset groove, 1102, breaking tool insertion groove, 1103, breaking tool groove, 111, wedge groove, 112, protective sheet, 113 , short ribs, 2, nail body, 21, spherical body, 22, hexagon socket, 23, step, 24, double thread, 25, hollow hole, 3, compression washer, 31, through hole 2, 32, U-shaped slot, 33, raised, 34, spherical cup 2, 35, cylinder 2.
  • an elongated minimally invasive hollow pedicle screw is composed of a nail cap 1, a nail body 2, and a compression washer 3.
  • the upper portion of the nail body 2 is installed in the nail cap 1 and is pressed. Washer 3 is fixed in position.
  • the nail cap 1 is provided with a nail base 12 and an elongated sleeve 19, and the nail base 12 and the extension sleeve 19 are integrally formed, and a wedge groove 111 is provided between the nail base 12 and the extension sleeve 19 for breaking during operation; 1
  • the two sides are provided with a waist groove 110, and the waist groove 110 is composed of a lifting reset groove 1101, a breaking tool groove 1103, a breaking tool insertion groove 1102, a lifting reset groove 1101, a breaking tool groove 1103 and a breaking tool insertion.
  • the slots 1102 are connected, respectively, for lifting and resetting, breaking of the tool insertion and breaking of the nail cap; the other side of the nail cap 1 is provided with a U-shaped groove 11 for facilitating the insertion of the rod during the operation; at the upper end of the U-shaped groove 11
  • the protective sheet 112 is provided to protect the nail cap from deformation during transportation, and the protective sheet 112 and the elongated sleeve 19 are connected with short ribs, which are easy to be broken during the operation; the inner wall of the lower portion of the nail cap 1 is provided with internal threads, and the nail body is provided. 2 is hollow.
  • the following provides a specific embodiment of an elongated minimally invasive hollow pedicle screw with an extended minimally invasive hollow pedicle screw.
  • FIG. 1 and 2 are two-dimensional views of the elongated minimally invasive hollow pedicle screw
  • FIG. 3 is a two-dimensional view of the compression washer.
  • the present invention discloses a novel minimally invasive hollow pedicle screw, which is composed of a nail cap 1, a nail body 2, a compression washer 3, and a nail body. 1 is installed in the nail cap 2 and is fixed by the pressure washer 3 to be fixed.
  • the nail cap 1 is provided with a nail base 12 and an elongated sleeve 19, and the nail base 12 and the elongated sleeve are integrally formed, and the inner walls of both sides of the nail base 12 are opened with a nail cap shaft.
  • a wedge groove 111 is disposed between the nail base 12 and the extension sleeve 19, and the left side of the nail cap 1 is provided with a waist groove 110, and the waist groove 110 is lifted by the reset groove 1101.
  • the breaking tool insertion slot 1102 and the breaking tool slot 1103 are formed.
  • the other two sides of the nail cap 1 are provided with a U-shaped groove 11 , and the U-shaped groove 11 has an internal thread 13 on the inner wall of the open end; the inner wall body is a cylinder 14 and a nail cap 1
  • the bottom is provided with a spherical cup- 17 and a through-hole 18; the upper end of the nail cap is provided with a protective sheet 112, and the protective sheet 112 is connected with the elongated sleeve 19 by a short rib 113.
  • the head of the nail body 2 is provided with a spherical body 21 and a hexagonal hole 22, and the spherical body end is provided with a plurality of steps 23, and the spherical body 21 and the nail cap of the nail body head.
  • the upper spherical cup 17 and the spherical cup 2 34 on the compression washer 3 are fitted; the body of the nail is a double thread 24, and the body is hollow 25.
  • the pressure washer 3 is provided with a through hole 31, and a U-shaped slot 32 is formed at one end, and the two edge protrusions 33 are engaged at the slot 15 of the inner wall of the nut cap.
  • the limit position, the lower end of the compression washer is provided with a spherical cup 2 34, and the outer body of the compression washer is a cylinder 2 35, which is matched with the main body cylinder 14 of the inner wall of the nail cap.
  • the assembly process of the minimally invasive hollow pedicle screw of the utility model is as follows: firstly, the nail body 2 is passed through the through hole 18 of the nail cap 1, and the ball head body 21 is matched with the spherical cup cup 17 of the nail cap; The pressure washer 3 is snapped in, and the spherical cups 2 and 34 of the washer are engaged with the spherical body 21 of the nail body, and the two edge projections 33 are caught at the groove 15 of the nail cap. The nail body 2 and the pressure washer 3 cannot be detached from the nail cap 1 after assembly.
  • the elongated minimally invasive hollow pedicle screw cap has a unique elongated sleeve 19, a protective sheet 112 and a waist groove 110.
  • the U-shaped groove 11 on both sides of the nail cap is under the action of the elongated sleeve 19.
  • the minimally invasive operation uses the hollow 25 of the nail body to install the screw to the corresponding position according to the previously inserted guide pin, and according to the actual situation during the operation, the corresponding protective tool can be used to selectively break the protective piece 112, through After the U-shaped groove 11 is placed into the rod, the screw plug is screwed into the rod, and then the corresponding surgical tool can be used to cooperate with the lifting and resetting groove 1101 in the waist groove to adjust the spine to reduce the spine.
  • the bow nail is in good contact with the inner rod.
  • the corresponding breaking tool can be inserted into the breaking tool insertion slot 1102 in the waist groove, and then the breaking portion of the waist groove is used to break the lengthening portion to reduce the planting.
  • the volume of the substance in the body is easy to operate, and it is suitable for spinal orthopedics and reduction, safe and effective.

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Neurology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)

Abstract

一种用于脊柱矫正和内固定的带保护套的加长型微创空心椎弓根螺钉，由钉帽（1）、钉体（2）、压紧垫圈（3）组成。钉体（2）上部安装在钉帽（1）内，通过压紧垫圈（3）限位固定。钉帽（1）设有钉座（12）和加长套管（19），钉座（12）和加长套管（19）为一整体。在钉座（12）和加长套管（19）之间设有楔形槽（111），以便术中折断。钉帽（1）两侧面设有腰形槽（110）。该腰形槽（110）由提拉复位槽（1101）、折断工具槽（1103）、折断工具插入槽（1102）组成。提拉复位槽（1101）、折断工具槽（1103）、折断工具插入槽（1102）连通，分别用于提拉复位、折断工具插入及钉帽加长端的折断。钉帽（1）另两侧面设有U型槽（11），在术中方便棒的置入；在U型槽（11）上端设有保护片（112），用于在运输过程中保护钉帽（1）不变形。

Description

一种加长型微创空心椎弓根螺钉 技术领域
本发明一种加长型微创空心椎弓根螺钉涉及的是外科医疗器械技术领域，具体地说，是一种用于脊柱矫正和内固定的带保护套的微创空心椎弓根螺钉。
背景技术
随着手术器械不断更新、先进的医疗影像设备的不断出现以及术中计算机辅助导航的应用，微创技术在脊柱外科中发展很快。目前普通手术为了安装的方便，开到操作面大，手术创伤大，愈合慢，容易引起创伤面的并发症，而微创是指以最小的侵袭和最小的生理干扰达到最佳的手术疗效的一种手术或检查方式，最主要的特征是是创伤微小化。外科手术作为有计划的创伤，术者应力求将手术的创伤降低到最低限度，达到微创的目的。微创手术减少手术时间，降低并发症的发病率，减轻术中组织损伤和出血，缩短患者恢复时间，减轻手术疼痛，是切口美观，缩短住院和康复时间，降低药物使用和住院花费的经济成本。总之，微创手术从医学专业属性和社会属性这两方面满足了和谐社会对公共医疗卫生事业的要求，随着科技的发展，脊柱微创技术将作为传统外科技术的一部分，成为脊柱内固定技术发展的一大趋势。
发明内容
本发明目的是针对上述不足之处提供一种加长型微创空心椎弓根螺钉，一种加长型微创空心椎弓根螺钉钉帽加长套管与手术工具配合经皮进入组织，创伤小，尤其是创伤的横截面积大大减小；所述一种加长型微创空心椎弓根螺钉钉帽加长套管的腰形槽配合手术工具可以在体外操作进行提拉复位，同时还起到与手术工具配合折断的作用，所述一种加长型微创空心椎弓根螺钉钉帽的U型槽上端设有保护片，可以在产品运输过程中确保产品外形不变形。
一种加长型微创空心椎弓根螺钉是采取以下技术方案实现：
一种加长型微创空心椎弓根螺钉由钉帽、钉体、压紧垫圈组成，钉体上部 安装在钉帽内，并通过压紧垫圈限位固定。钉帽设有钉座和加长套管，钉座和加长套管为一整体，在钉座和加长套管之间设有楔形槽，以便术中折断；钉帽两侧面设有腰形槽，所述的腰形槽有提拉复位槽、折断工具槽、折断工具插入槽组成，提拉复位槽、折断工具槽和折断工具插入槽连通，分别用于提拉复位，折断工具插入及钉帽加长断的折断；钉帽另两侧面设有U型槽，在术中方便棒的置入；在U型槽上端设有保护片，可在运输过程中保护钉帽不变形，保护片与加长套管间设有短筋相连，在术中易于折断；钉帽下部内壁设有内螺纹，钉体采用中空设计。
工作原理：
脊柱手术时切皮后，通过管路扩张系统扩皮微创操作，在植入钉体的相应部位插入导针，通过中空的手术工具将螺钉按照先前置入的导针安装到相应位置，之后撤离管路扩张系统，根据术中实际情况利用相应手术工具可选择折断保护片，通过U型槽放入棒后拧入相配合的螺塞，之后可按照术中实际情况利用相应手术工具与腰形槽中的提拉复位槽配合后可对脊柱进行提拉复位，使椎弓根钉与内固定棒接触良好。螺塞压住内固定棒后，旋转到位，即可通过相应的折断工具插入腰形槽中的折断工具插入槽，继而配合腰形槽中的折断工具槽将加长部分折断取出，操作方便，适用于脊柱矫形和复位，安全有效。
本发明一种加长型微创空心椎弓根螺钉优点：
(1)所述一种加长型微创空心椎弓根螺钉钉帽加长套管与手术工具配合经皮进入组织，创伤小，尤其是创伤的横截面积大大减小；
(2)所述一种加长型微创空心椎弓根螺钉钉帽加长套管的腰形槽配合手术工具可以在体外操作进行提拉复位，同时还起到与手术工具配合折断的作用；
(3)所述一种加长型微创空心椎弓根螺钉钉帽的U型槽上端设有保护片，可以在产品运输过程中确保产品外形不变形；
(4)所述一种加长型微创空心椎弓根螺钉钉体螺纹双头变径设计可增加螺钉的把持力且进钉速度快；
(5)所述一种加长型微创空心椎弓根螺钉钉体为中空设计，采用中空的工具可沿先前的导针安装到相应部位。
附图说明
以下将结合附图对本发明作进一步说明：
图1是一种加长型微创空心椎弓根螺钉结构主视图。
图2是述一种加长型微创空心椎弓根螺钉结构左视图。
图3是一种加长型微创空心椎弓根螺钉压紧垫圈的结构主视图。
附图中的标号为：1、钉帽，11、U型槽，12、钉座，13、内螺纹一，14、圆柱一，15、槽一,16、槽二,17、球形臼杯一，18、通孔一，19、加长套管，110、腰形槽，1101、提拉复位槽，1102、折断工具插入槽，1103、折断工具槽，111、楔形槽，112、保护片，113、短筋，2、钉体，21、球形臼体，22、内六角孔，23、台阶，24、双头螺纹，25、中空孔，3、压紧垫圈，31、通孔二，32、U型槽孔，33、凸起，34、球形臼杯二，35、圆柱二。
具体实施方式
参照附图1、2、3，一种加长型微创空心椎弓根螺钉由钉帽1、钉体2、压紧垫圈3组成，钉体2上部安装在钉帽1内，并通过压紧垫圈3限位固定。钉帽1设有钉座12和加长套管19，钉座12和加长套管19为一整体，在钉座12和加长套管19之间设有楔形槽111，以便术中折断；钉帽1两侧面设有腰形槽110，所述的腰形槽110有提拉复位槽1101、折断工具槽1103、折断工具插入槽1102组成，提拉复位槽1101、折断工具槽1103和折断工具插入槽1102连通，分别用于提拉复位，折断工具插入及钉帽加长断的折断；钉帽1另两侧面设有U型槽11，在术中方便棒的置入；在U型槽11上端设有保护片112，可在运输过程中保护钉帽不变形，保护片112与加长套管19间设有短筋相连，在术中易于折断；钉帽1下部内壁设有内螺纹，钉体2为中空。
以下提供所述一种加长型微创空心椎弓根螺钉一种加长型微创空心椎弓根螺钉的具体实施方式。
附图1和图2为所述一种加长型微创空心椎弓根螺钉的二维示意图，附图3为压紧垫圈的二维示意图。
如附图1和图2所示，所述一种加长型微创空心椎弓根螺钉一种新型微创空心椎弓根螺钉由钉帽1、钉体2、压紧垫圈3组成，钉体1安装在钉帽2内，并通过压紧垫圈3限位固定。
如附图1和图2所示，所述的钉帽1设有钉座12和加长套管19，钉座12和加长套管为一整体，钉座12两侧内壁开有与钉帽轴向垂直的槽一15和槽二16，在钉座12和加长套管19之间设有楔形槽111，钉帽1两侧面设有腰形槽110，腰形槽110由提拉复位槽1101、折断工具插入槽1102、折断工具槽1103组成，钉帽1另两侧面设有U型槽11，U型槽11开口一端内壁设有内螺纹一13；内壁主体为圆柱一14，钉帽1底部设有球形臼杯一17和通孔一18；钉帽上端两侧设有保护片112，保护片112与加长套管19间有短筋113相连。
如附图1所示，所述的钉体2头部设有球形臼体21和内六角孔22，球形臼体端部设有若干台阶23，钉体头部的球形臼体21与钉帽上的球形臼杯一17和压紧垫圈3上的球形臼杯二34配合；钉体身部螺纹为双头螺纹24，钉体为中空25。
如附图1和图3所示，所述的压紧垫圈3设有通孔二31，一端开有U型槽孔32，两边缘凸起33卡于钉帽内壁的槽一15处用以限位，压紧垫圈下端设有球形臼杯二34，压紧垫圈外侧主体为圆柱二35，与钉帽内壁主体圆柱一14匹配。
该实用新型微创空心椎弓根螺钉装配流程为：首先将钉体2穿过钉帽1的通孔一18处，其球头臼体21与钉帽的球形臼杯一17配合；再将压紧垫圈3卡入，垫圈的球形臼杯二34与钉体的球形臼体21配合，两边缘凸起33卡于钉帽的槽一15处。装配后钉体2和压紧垫圈3不能从钉帽1上脱出。
所述一种加长型微创空心椎弓根螺钉钉帽侧面独特的加长套管19、保护片112及腰形槽110设计，钉帽两侧的U形槽11在加长套管19的作用下使得在术 中更加容易的调整固定棒的放置位置，上端保护片112确保在运输过程中产品不发生变形，腰形槽在术中配合工具可同时起到提拉复位及折断的作用。手术时，微创操作，通过中空的手术工具，利用钉体的中空25将螺钉按照先前置入的导针安装到相应位置，根据术中实际情况利用相应手术工具可选择折断保护片112，通过U型槽11放入棒后拧入相配合的螺塞，之后可按照术中实际情况利用相应手术工具与腰形槽中的提拉复位槽1101配合后可对脊柱进行提拉复位，使椎弓根钉与内固定棒接触良好。螺塞压住内固定棒后，旋转到位，即可通过相应的折断工具插入腰形槽中的折断工具插入槽1102，继而配合腰形槽中的折断工具槽1103将加长部分折断取出，减少植入物在体内的体积，操作方便，适用于脊柱矫形和复位，安全有效。
以上所述仅是所述一种加长型微创空心椎弓根螺钉的优选实施方式，应当指出，对于本技术领域的普通技术人员，在不脱离所述一种加长型微创空心椎弓根螺钉构思的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为所述一种加长型微创空心椎弓根螺钉的保护范围内。

Claims (8)

  1. 一种加长型微创空心椎弓根螺钉，其特征在于：由钉帽、钉体、压紧垫圈组成，钉体上部安装在钉帽内，并通过压紧垫圈限位固定，钉帽设有钉座和加长套管，钉座和加长套管为一整体，在钉座和加长套管之间设有楔形槽，以便术中折断；钉帽两侧面设有腰形槽，所述的腰形槽有提拉复位槽、折断工具槽、折断工具插入槽组成，提拉复位槽、折断工具槽和折断工具插入槽连通，分别用于提拉复位，折断工具插入及钉帽加长断的折断；钉帽另两侧面设有U型槽一，在术中方便棒的置入；在U型槽一上端设有保护片，可在运输过程中保护钉帽不变形。
  2. 根据权利要求1所述的一种加长型微创空心椎弓根螺钉，其特征在于：保护片与加长套管间设有短筋相连，在术中易于折断。
  3. 根据权利要求1所述的一种加长型微创空心椎弓根螺钉，其特征在于：钉帽下部内壁设有内螺纹。
  4. 根据权利要求1所述的一种加长型微创空心椎弓根螺钉，其特征在于：钉体为中空。
  5. 根据权利要求1所述的一种加长型微创空心椎弓根螺钉，其特征在于：钉帽另两侧面设有的U型槽开口一端内壁设有内螺纹一；内壁主体为圆柱一，钉帽底部设有球形臼杯一和通孔一。
  6. 根据权利要求1所述的一种加长型微创空心椎弓根螺钉，其特征在于：所述的钉体头部设有球形臼体和内六角孔，球形臼体端部设有若干台阶，钉体头部的球形臼体与钉帽上的球形臼杯一和压紧垫圈上的球形臼杯二配合。
  7. 根据权利要求1所述的一种加长型微创空心椎弓根螺钉，其特征在于：钉体身部螺纹为双头螺纹。
  8. 根据权利要求1所述的一种加长型微创空心椎弓根螺钉，其特征在于：、所述的压紧垫圈设有通孔二，一端开有U型槽孔，两边缘凸起卡于钉帽内壁的槽一处用以限位，压紧垫圈下端设有球形臼杯二，压紧垫圈外侧主体为圆柱 二，与钉帽内壁主体圆柱一匹配。
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