WO2014117560A1 - Vertebral arch pedicle positioner for spinal posterior minimally invasive screw fixation - Google Patents
Vertebral arch pedicle positioner for spinal posterior minimally invasive screw fixation Download PDFInfo
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- WO2014117560A1 WO2014117560A1 PCT/CN2013/086960 CN2013086960W WO2014117560A1 WO 2014117560 A1 WO2014117560 A1 WO 2014117560A1 CN 2013086960 W CN2013086960 W CN 2013086960W WO 2014117560 A1 WO2014117560 A1 WO 2014117560A1
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- minimally invasive
- positioner
- metal ring
- vertebral arch
- pedicle
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/04—Positioning of patients; Tiltable beds or the like
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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
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
- A61B17/1757—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the spine
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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
Definitions
- the invention relates to a pedicle locator for minimally invasive placement of the posterior spinal column, which belongs to the field of medical instruments.
- pedicle screw technique has developed rapidly since its inception in the 1980s and has been widely used in the surgical treatment of spinal degeneration, vertebral spondylolisthesis, spinal stenosis, vertebral fracture, deformity, bone metastases and spinal instability. .
- pedicle screws are one of the most widely used internal fixation devices in spinal surgery.
- the pedicle screw implantation methods mainly include: 1.
- the posterior median incision and nailing is a traditional surgical method. It is widely used in clinical practice and is widely accepted by most clinicians. The main disadvantage is that the surgical trauma is large.
- minimally invasive spinal technique that is, minimally invasive nailing technology assisted by posterior channel, which performs spinal pedicle screw placement with special surgical instruments and instruments such as medical imaging, auxiliary channel expansion and microscopic endoscopy.
- the best treatment effect is achieved with minimal damage.
- the surgical incision is short, the trauma is small, the bleeding is less, the postoperative function is recovered quickly, and the incidence of postoperative low back pain is reduced.
- Conventional posterior spinal minimally invasive nailing technique is more complicated and time-consuming in anterior pedicle positioning. It generally uses preoperative Kirschner wire to penetrate the pedicle and expand the approach after the pedicle, especially requiring repeated fluoroscopy. Patients and health care workers are additionally exposed to more rays; their dilation after perforation may deviate from the gap between the multifidus and the longissimus muscles and cause damage to the multifidus and longest muscles. At present, there is a need for a simple and effective, easy-to-master pedicle preoperative positioning technique and a less traumatic surgical approach.
- the object of the present invention is to provide a positioning device capable of assisting accurate, rapid, and convenient projection of a pedicle surface, in view of the deficiencies of the prior art, and to provide accurate selection of small incisions for posterior nail placement. Positioning.
- a pedicle locator for minimally invasive spinal posterior approach includes a pair of metal rings that cannot penetrate through the same perspective ray, and the metal rings are fixed by a connecting portion Connecting, the metal ring body is located at the same level In-plane, when the locator is placed laterally on the back of the patient for fluoroscopy, the projection of the bilateral pedicle is simultaneously positioned in the metal ring by fine adjustment of the locator.
- Accurate positioning at the same time without the need for repeated fluoroscopy to position the pedicle in the center of the ring, the positioning is simple and fast, and can significantly reduce the number of X-ray exposure.
- the metal ring body has an inner diameter of 26 mm, an outer diameter of 34 mm, and a thickness of 4 mm ; the connecting portion has a length of 4 mm, a width of 6 mm, and a thickness of 4 mm.
- the distance between the two centers of the metal ring is based on the measurement of the distance between a large number of pedicles, and the distance between the two centers is 8 mm larger than the average distance measured by the pedicle, so that the pedicle is positioned behind the metal. Longitudinal incision of the center of the ring allows the surgical incision to be on the outside of the pedicle, providing space for the pedicle screw to require a 10° to 15° camber angle, making the surgical procedure more convenient.
- the upper surface of the connecting portion is provided with a semicircular protrusion, and the protrusion has a through hole in a direction perpendicular to a line connecting the centers of the two metal ring bodies.
- the semicircular projection has a diameter of 6 mm and the through hole has a diameter of 4 mm.
- a plurality of locators are connected through a through hole through a through-hole to realize positioning of a plurality of segments.
- the metal rod can be shaped according to the shape of the spinous process to coincide with the spinous process. Perform perspective.
- the metal rod is a shapeable aluminum alloy rod with a diameter of 4 mm, and has three specifications according to the length: 100 mm, 200 mm and 300 mm.
- the invention has the following beneficial effects: (1) The position of the pedicle can be accurately and easily positioned on the body surface, and the small incision can be accurately selected, and the same operation as the existing minimally invasive technique can be used. In the case of the length of the incision, the gap between the multifidus muscle and the longissimus muscle is separated by direct vision to reach the surgical site; (2) The percutaneous direct sputum is prevented from causing the surgical approach to damage the muscle within the muscle, and the vertebral arch can be easily reached. The nail placement and the lamina are surgically performed; (3) The operation is simple, convenient, quick and time-saving, and avoids excessive radiation exposure.
- Figure 1 is a schematic view of the structure of the present invention.
- metal ring body 1, connecting part; 3, semi-circular protrusion; 4, through hole.
- a pedicle locator for posterior spinal minimally invasive nailing includes a pair of metal ring bodies 1 which are not penetrated by the same perspective ray, between the metal ring bodies 1
- the metal ring body 1 is fixedly connected by the connecting portion 2, wherein the metal ring body 1 has an inner diameter of 26 mm, an outer diameter of 34 mm, and a thickness of 4 mm; the connecting portion 2 has a length of 4 mm, a width of 6 mm, and a thickness of 4 mm.
- the upper surface of the connecting portion 2 is provided with a semicircular protrusion 3, and the protrusion 3 is provided with a through hole 4 in a direction perpendicular to a line connecting the centers of the two metal ring bodies 1, the semicircular protrusion 3
- the diameter of the through hole 4 is 4 mm, and the projection of the bilateral pedicle is simultaneously positioned in the metal ring by fine adjustment of the positioner when the positioner is laterally placed on the back of the patient for front and rear perspective.
- the metal rod can be shaped according to the shape of the spinous process to coincide with the spinous process.
- the metal rod is a shapeable aluminum alloy rod having a diameter of 4 mm, and has three specifications depending on the length: 100 mm, 200 mm, and 300 mm.
Abstract
A vertebral arch pedicle positioner for spinal posterior minimally invasive screw fixation comprises a pair of same metal ring bodies (1) that cannot be penetrated by fluoroscopic rays, wherein the metal ring bodies (1) are fixedly connected through a connecting part (2), and the metal ring bodies (1) are located on a same plane. When the positioner is horizontally placed on a patient's back for fluoroscopy, projections of vertebral arch pedicles on two sides are simultaneously positioned in the metal ring bodies (1) through fine tuning of the positioner. The positioner can be used to easily and accurately position the vertebral arch pedicles on a body surface and accurately select a surgical small incision. Thus, a surgical operation position can be reached by separating a clearance between a multifidus muscle and a longissimus muscle under direct view under a condition that a length of the surgical incision remains the same as that formed by a prior minimally invasive spine surgery technique, and a condition that a muscle is damaged by a surgical approach due to percutaneous direct puncture is avoided. A screw fixation position on the vertebral arch pedicles and a vertebral arch can be easily reached for performing screw fixation and pressure reducing operations. The positioner is simple and convenient in operation, is time saving, and prevents excessive rays from being exposed.
Description
一种脊柱后路微创置钉的椎弓根定位器 技术领域 A pedicle locator for minimally invasive nail placement in the posterior spinal field
本发明涉及一种脊柱后路微创置钉的椎弓根定位器， 属于医疗器械领域。 The invention relates to a pedicle locator for minimally invasive placement of the posterior spinal column, which belongs to the field of medical instruments.
背景技术 Background technique
椎弓根螺钉技术自上世纪 80 年代问世以来发展迅速， 已经广泛应用于脊柱退行性变、 椎 体滑脱、 椎管狭窄、 椎体骨折、 畸形、 骨转移瘤及脊柱失稳等疾患的手术治疗。 目前， 椎弓 根螺钉是脊柱外科手术中应用最为广泛的内固定器械之一。 椎弓根螺钉植入方法主要有： 1、 经后路正中切开置钉术， 其为传统手术方式， 目前临床应用广泛， 为大多数临床医师广泛接 受； 其主要缺点是手术创伤较大， 椎弓根进针点暴露困难， 出血较多， 术后病人恢复时间较 长， 多合并最长肌和多裂肌的萎缩， 常合并韧带破坏致不稳定， 远期部分患者留有腰痛。 2、 脊柱微创技术， 即后路通道辅助下微创置钉技术， 其借助医学影像、 辅助通道扩张及显微内 窥镜等特殊手术器械和仪器进行脊柱椎弓根螺钉置入的操作， 以最小的损伤达到最佳的治疗 效果， 较传统方法手术切口短、 创伤小、 出血少、 术后功能恢复快， 降低术后腰背部疼痛的 发生率。 但目前从其发明， 临床应用至今快 30 年， 因为其配套器械的价格昂贵及学习曲线 相对平缓， 其并未得到广泛的应用和推广， 特别是国内目前仅限于三级医院脊柱外科开展。 目前临床需要一种和微创技术一样手术切口短、 创伤小、 出血少、 术后功能恢复快但价格 便宜， 简单有效， 容易掌握的新的微创技术。 发明人对传统的脊柱后路微创技术进行了改良， 重新设计了一套简单方便， 更容易掌握， 创伤较传统微创更小的手术方式和手术器械， 而椎 弓根定位器就是其中重要的一件。 The pedicle screw technique has developed rapidly since its inception in the 1980s and has been widely used in the surgical treatment of spinal degeneration, vertebral spondylolisthesis, spinal stenosis, vertebral fracture, deformity, bone metastases and spinal instability. . Currently, pedicle screws are one of the most widely used internal fixation devices in spinal surgery. The pedicle screw implantation methods mainly include: 1. The posterior median incision and nailing is a traditional surgical method. It is widely used in clinical practice and is widely accepted by most clinicians. The main disadvantage is that the surgical trauma is large. The pedicle needle insertion difficulty is difficult, the bleeding is more, the recovery time of the postoperative patient is longer, and the atrophy of the longissimus dorsi muscle and the multifidus muscle is often combined, and the ligament destruction is often unstable, and some patients have low back pain in the long-term. 2, minimally invasive spinal technique, that is, minimally invasive nailing technology assisted by posterior channel, which performs spinal pedicle screw placement with special surgical instruments and instruments such as medical imaging, auxiliary channel expansion and microscopic endoscopy. The best treatment effect is achieved with minimal damage. Compared with the traditional method, the surgical incision is short, the trauma is small, the bleeding is less, the postoperative function is recovered quickly, and the incidence of postoperative low back pain is reduced. However, it has been clinically applied for 30 years, because its supporting equipment is expensive and the learning curve is relatively flat. It has not been widely used and promoted, especially in China, which is currently limited to the spine surgery of tertiary hospitals. At present, there is a need for a new minimally invasive technique that is short in surgical incision, less invasive, less bleeding, quicker in function recovery but cheaper, simple, effective, and easy to grasp, as well as minimally invasive techniques. The inventor has improved the traditional minimally invasive posterior spinal technique and redesigned a set of surgical methods and surgical instruments that are simpler, easier to grasp, and have less trauma than traditional minimally invasive surgery. The pedicle locator is important. One piece.
传统脊柱后路微创置钉技术前椎弓根的定位是比较复杂和费时的， 其一般采用术前克氏 针穿剌定位椎弓根后通道扩张入路， 特别是需要反复的射线透视使得病人和医护人员额外的 暴露在更多的射线中； 其穿剌后扩张的入路可能偏离多裂肌和最长肌的间隙而造成多裂肌和 最长肌肉的损伤。 目前临床需要一种简单有效， 容易掌握的椎弓根术前定位技术及创伤更小 的手术入路。 Conventional posterior spinal minimally invasive nailing technique is more complicated and time-consuming in anterior pedicle positioning. It generally uses preoperative Kirschner wire to penetrate the pedicle and expand the approach after the pedicle, especially requiring repeated fluoroscopy. Patients and health care workers are additionally exposed to more rays; their dilation after perforation may deviate from the gap between the multifidus and the longissimus muscles and cause damage to the multifidus and longest muscles. At present, there is a need for a simple and effective, easy-to-master pedicle preoperative positioning technique and a less traumatic surgical approach.
发明内容 Summary of the invention
发明目的： 本发明的目的在于针对现有技术的不足， 提供一种可以辅助准确、 快速、 方便 的进行椎弓根体表投影的定位装置， 为后路置钉时小切口的选择提供准确的定位。 OBJECT OF THE INVENTION: The object of the present invention is to provide a positioning device capable of assisting accurate, rapid, and convenient projection of a pedicle surface, in view of the deficiencies of the prior art, and to provide accurate selection of small incisions for posterior nail placement. Positioning.
技术方案： 本发明所述的一种脊柱后路微创置钉的椎弓根定位器， 包括一对相同的透视射 线无法穿透的金属环体， 所述金属环体之间通过连接部固定连接， 所述金属环体位于同一平
面内， 将该定位器横向置于患者背部后进行透视时， 通过定位器的微调将双侧椎弓根的投影 同时定位在金属环体内。 无需像经皮穿剌椎弓根定位那样需要精确定位， 因为根据透视的图 像， 术者已经了解椎弓根和金属圈的相对位置， 所以在选择小切口时， 仅仅需要粗略调整切 口位置就可以准确定位， 同时无需反复透视一次性将椎弓根定位在环的中央， 定位简单快速， 且可以明显减少 X线曝光的次数。 Technical Solution: A pedicle locator for minimally invasive spinal posterior approach according to the present invention includes a pair of metal rings that cannot penetrate through the same perspective ray, and the metal rings are fixed by a connecting portion Connecting, the metal ring body is located at the same level In-plane, when the locator is placed laterally on the back of the patient for fluoroscopy, the projection of the bilateral pedicle is simultaneously positioned in the metal ring by fine adjustment of the locator. There is no need for precise positioning like percutaneous transpedicular pedicle positioning, because according to the fluoroscopy image, the surgeon has already understood the relative position of the pedicle and the metal ring, so when selecting a small incision, only a rough adjustment of the incision position is required. Accurate positioning, at the same time without the need for repeated fluoroscopy to position the pedicle in the center of the ring, the positioning is simple and fast, and can significantly reduce the number of X-ray exposure.
进一步完善上述技术方案， 所述金属环体的内径为 26mm， 外径为 34mm， 厚度为 4mm; 所述连接部的长为 4mm， 宽为 6mm， 厚度为 4mm。 金属环体两圆心之间的距离是建立在大 量椎弓根间距离测量的基础上的， 同时两个圆心的距离较椎弓根人体测量的平均距离大 8mm, 这样定位椎弓根后沿金属环体圆心纵向切开可以使手术切口在椎弓根的外侧， 为椎弓 根置钉需要 10° 到 15 ° 的外倾角提供了空间， 使得手术操作更加方便。 Further improving the above technical solution, the metal ring body has an inner diameter of 26 mm, an outer diameter of 34 mm, and a thickness of 4 mm ; the connecting portion has a length of 4 mm, a width of 6 mm, and a thickness of 4 mm. The distance between the two centers of the metal ring is based on the measurement of the distance between a large number of pedicles, and the distance between the two centers is 8 mm larger than the average distance measured by the pedicle, so that the pedicle is positioned behind the metal. Longitudinal incision of the center of the ring allows the surgical incision to be on the outside of the pedicle, providing space for the pedicle screw to require a 10° to 15° camber angle, making the surgical procedure more convenient.
进一步地 ， 所述连接部的上表面设有半圆形突起， 所述突起上沿与两个金属环体的圆心 连线相垂直的方向开有通孔。 Further, the upper surface of the connecting portion is provided with a semicircular protrusion, and the protrusion has a through hole in a direction perpendicular to a line connecting the centers of the two metal ring bodies.
所述半圆形突起的直径为 6mm， 所述通孔的直径为 4mm。 The semicircular projection has a diameter of 6 mm and the through hole has a diameter of 4 mm.
利用可弯曲金属杆穿过通孔将多个定位器连接起来， 实现多个节段的定位， 对于脊柱侧弯 的病人， 可以根据棘突的形态塑形金属杆使其与棘突重合后再进行透视。 A plurality of locators are connected through a through hole through a through-hole to realize positioning of a plurality of segments. For patients with scoliosis, the metal rod can be shaped according to the shape of the spinous process to coincide with the spinous process. Perform perspective.
所述金属杆为可塑形铝制合金棒， 直径为 4mm，,根据长度不同有三种规格： 100mm、 200mm禾口 300mm。 The metal rod is a shapeable aluminum alloy rod with a diameter of 4 mm, and has three specifications according to the length: 100 mm, 200 mm and 300 mm.
本发明与现有技术相比， 其有益效果是： （1 ) 可以准确轻易的在体表定位椎弓根的位置， 准确选择手术小切口， 同时可以在采用和现有脊柱微创技术同样手术切口长度的情况下， 通 过直视分离多裂肌和最长肌的间隙到达手术部位； （2) 避免了经皮直接穿剌造成手术入路在 肌肉以内损伤肌肉的情况， 可以轻易到达椎弓根置钉部位和椎板进行手术操作； （3 ) 操作简 单方便快捷省时， 而且避免过多的射线暴露。 Compared with the prior art, the invention has the following beneficial effects: (1) The position of the pedicle can be accurately and easily positioned on the body surface, and the small incision can be accurately selected, and the same operation as the existing minimally invasive technique can be used. In the case of the length of the incision, the gap between the multifidus muscle and the longissimus muscle is separated by direct vision to reach the surgical site; (2) The percutaneous direct sputum is prevented from causing the surgical approach to damage the muscle within the muscle, and the vertebral arch can be easily reached. The nail placement and the lamina are surgically performed; (3) The operation is simple, convenient, quick and time-saving, and avoids excessive radiation exposure.
附图说明 DRAWINGS
图 1为本发明的结构示意图。 Figure 1 is a schematic view of the structure of the present invention.
图中： 1、 金属环体； 2、 连接部； 3、 半圆形突起； 4、 通孔。 In the figure: 1, metal ring body; 2, connecting part; 3, semi-circular protrusion; 4, through hole.
具体实施方式 detailed description
下面对本发明技术方案进行详细说明， 但是本发明的保护范围不局限于所述实施例。 The technical solution of the present invention will be described in detail below, but the scope of protection of the present invention is not limited to the embodiment.
实施例 1 : 如图 1所示， 一种脊柱后路微创置钉的椎弓根定位器， 包括一对相同的透视射 线无法穿透的金属环体 1， 所述金属环体 1之间通过连接部 2固定连接， 所述金属环体 1位 于同一平面内， 所述金属环体 1的内径为 26mm， 外径为 34mm， 厚度为 4mm; 所述连接部
2的长为 4mm， 宽为 6mm， 厚度为 4mm。 所述连接部 2的上表面设有半圆形突起 3， 所述 突起 3上沿与两个金属环体 1的圆心连线相垂直的方向开有通孔 4， 所述半圆形突起 3的直 径为 6mm， 所述通孔 4的直径为 4mm， 将该定位器横向置于患者背部后进行前后位透视时， 通过定位器的微调将双侧椎弓根的投影同时定位在金属环体内。 Embodiment 1 : As shown in FIG. 1 , a pedicle locator for posterior spinal minimally invasive nailing includes a pair of metal ring bodies 1 which are not penetrated by the same perspective ray, between the metal ring bodies 1 The metal ring body 1 is fixedly connected by the connecting portion 2, wherein the metal ring body 1 has an inner diameter of 26 mm, an outer diameter of 34 mm, and a thickness of 4 mm; the connecting portion 2 has a length of 4 mm, a width of 6 mm, and a thickness of 4 mm. The upper surface of the connecting portion 2 is provided with a semicircular protrusion 3, and the protrusion 3 is provided with a through hole 4 in a direction perpendicular to a line connecting the centers of the two metal ring bodies 1, the semicircular protrusion 3 The diameter of the through hole 4 is 4 mm, and the projection of the bilateral pedicle is simultaneously positioned in the metal ring by fine adjustment of the positioner when the positioner is laterally placed on the back of the patient for front and rear perspective. .
同时， 利用可弯曲金属杆穿过通孔将多个定位器连接起来， 实现多个节段的定位， 对于脊 柱侧弯的病人， 可以根据棘突的形态塑形金属杆使其与棘突重合后再进行透视， 所述金属杆 为可塑形铝制合金棒， 直径为 4mm，,根据长度不同有三种规格： 100mm、 200mm和 300mm。 如上所述， 尽管参照特定的优选实施例已经表示和表述了本发明， 但其不得解释为对本发 明自身的限制。 在不脱离所附权利要求定义的本发明的精神和范围前提下， 可对其在形式上 和细节上作出各种变化。
At the same time, a plurality of locators are connected through a through hole through a flexible metal rod to realize positioning of a plurality of segments. For patients with scoliosis, the metal rod can be shaped according to the shape of the spinous process to coincide with the spinous process. After the fluoroscopy, the metal rod is a shapeable aluminum alloy rod having a diameter of 4 mm, and has three specifications depending on the length: 100 mm, 200 mm, and 300 mm. As described above, although the invention has been shown and described with reference to a particular preferred embodiment, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined by the appended claims.
Claims
1. 一种脊柱后路微创置钉的椎弓根定位器， 其特征在于， 包括一对相同的透视射线无法穿 透的金属环体， 所述金属环体之间通过连接部固定连接， 所述金属环体位于同一平面内， 将 该定位器横向置于患者背部后进行透视时， 通过定位器的微调将双侧椎弓根的投影同时定位 在金属环体内。 A pedicle locator for minimally invasive posterior spinal cord, characterized in that it comprises a pair of metal rings which are not penetrated by the same perspective ray, and the metal rings are fixedly connected by a connecting portion. The metal ring body is located in the same plane, and when the locator is laterally placed on the back of the patient for fluoroscopy, the projection of the bilateral pedicle is simultaneously positioned in the metal ring by fine adjustment of the positioner.
2. 根据权利要求 1 所述的一种脊柱后路微创置钉的椎弓根定位器， 其特征在于， 所述金属 环体的内径为 26mm， 外径为 34mm， 厚度为 4mm; 所述连接部的长为 4mm， 宽为 6mm， 厚度为 4mm。 2 . The pedicle locator of the posterior spinal minimally invasive nail according to claim 1 , wherein the metal ring body has an inner diameter of 26 mm, an outer diameter of 34 mm, and a thickness of 4 mm; The connecting portion has a length of 4 mm, a width of 6 mm, and a thickness of 4 mm.
3. 根据权利要求 1 所述的一种脊柱后路微创置钉的椎弓根定位器， 其特征在于， 所述连接 部的上表面设有半圆形突起， 所述突起上沿与两个金属环体的圆心连线相垂直的方向开有通 孔。 3. The pedicle locator of a posterior spinal minimally invasive nail according to claim 1, wherein the upper surface of the connecting portion is provided with a semi-circular protrusion, and the upper edge of the protrusion is The center line of the metal ring body has a through hole in a direction perpendicular to the line.
4. 根据权利要求 3 所述的一种脊柱后路微创置钉的椎弓根定位器， 其特征在于， 所述半圆 形突起的直径为 6mm， 所述通孔的直径为 4mm。
4. A pedicle locator for posterior spinal minimally invasive nailing according to claim 3, wherein the semicircular protrusion has a diameter of 6 mm and the through hole has a diameter of 4 mm.
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| CN2013100355729A CN103169535A (en) | 2013-01-30 | 2013-01-30 | Vertebral pedicle positioner for spinal column posterior approach minimally-invasive screw fixation |
| CN201310035572.9 | 2013-01-30 |
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| CN103169535A (en) * | 2013-01-30 | 2013-06-26 | 南京医科大学第一附属医院 | Vertebral pedicle positioner for spinal column posterior approach minimally-invasive screw fixation |
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