CN105030313B - 一种磁性导航椎弓根钉 - Google Patents
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Abstract
本发明提供一种磁性导航椎弓根钉，其包括呈一体成型的螺纹钉杆和U型钉壁，U型钉壁的内壁上设有内螺纹，所述螺纹钉杆内设置有沿螺纹钉杆轴线的通孔，所述通孔的上下两端设置磁性材料，上下两端的磁性材料之间设置间隔件，在螺纹钉杆中设计有磁性材料，配合磁性传感器在术中定位监控进钉位置、角度、深度等数据，从而解决传统手术依赖医生经验、手感等问题，提高手术成功率和手术质量及满足微创手术的需求，并且，可根据钉体内磁性材料判断术中进钉是否出现断钉问题，亦可在术后恢复期配合体外监测设备及时发现钉体是否出现断钉问题，及多枚椎弓根钉之间异常移位问题，帮助患者及时就医。
Description
技术领域
本发明属于医疗器械技术领域，主要涉及一种磁性导航椎弓根钉。
背景技术
脊柱内固定技术的应用已经有几十年的历史。传统的钉棒内固定系统一般由椎弓根钉、矫形棒、连接器、横连及锁紧螺母组成。通过开放式脊柱手术，辅以钉棒内固定系统对脊柱进行固定支撑、畸形矫正、促进骨融合恢复，从而治疗脊柱疾患。
而钉棒内固定系统中，术中椎弓根钉的准确植入对手术成功起到关键作用，且传统手术依赖医生手感、经验；以及术后椎弓根钉负荷过大，螺钉位置不当，椎间盘退变造成椎间盘高度丢失，骨质疏松或者术后康复时间不足等因素造成体内椎弓根钉过度位移甚至断裂情况，从而导致手术失败和并发症问题。
发明内容
为了解决上述技术的不足，本发明的目的在于提供一种磁性导航椎弓根钉。
本发明提供：一种磁性导航椎弓根钉，其包括呈一体成型的螺纹钉杆和U型钉壁，U型钉壁的内壁上设有内螺纹，所述螺纹钉杆内设置有沿螺纹钉杆轴线的通孔，所述通孔的上下两端设置磁性材料，上下两端的磁性材料之间设置间隔件。
所述磁性材料为铷铁硼磁体。
所述磁性材料以及间隔件为圆管结构。
所述螺纹钉杆与U型钉壁一体成型。
所述通孔沿螺纹钉杆轴线的延伸到U型钉壁的底部。
所述螺纹钉杆的后端设有球形的臼体，所述U型钉壁的底部设有与臼体相适配的臼杯，臼体容置于臼杯内且两者滑动配合，在U型臼杯的前端设有对螺纹钉杆进行限位的限位部。
所述限位部包括卡圈和挡圈。
所述U型钉壁的外表面设有盲孔。
所述U型钉壁的外表面设置槽口。
本发明的螺纹钉杆中设计有磁性材料，配合磁性传感器定位监控术中进钉位置、角度、深度等数据，从而解决传统手术依赖医生经验、手感等问题，提高手术成功率和手术质量及满足微创手术的需求。并且，可根据钉体内两部分磁性材料判断术中进钉是否出现断钉问题；亦可在术后恢复期配合体外监测设备及时发现钉体是否出现断钉问题，及多枚磁性导航椎弓根钉之间异常移位问题，帮助患者及时就医。
附图说明
图1为实施例1的剖面示意图。
图2为实施例1的折断示意图。
图3为实施例2的剖面示意图。
图4为实施例2的折断示意图。
图5为实施例3的剖面示意图。
图6为实施例3的折断示意图。
图中，1、U型钉壁；2、螺纹钉杆；3、磁性材料；4、间隔件；5、槽口；6、盲孔；7、臼体；8、臼杯；9、挡圈；10、卡圈。
具体实施方式
下面结合附图对本发明实施例作进一步说明：
如图1和图2所示，本发明提供一种磁性导航椎弓根钉，其包括呈一体成型的螺纹钉杆2和U型钉壁1，U型钉壁1的内壁上设有内螺纹，所述螺纹钉杆2内设置有沿螺纹钉杆轴线的通孔，所述通孔的上下两端设置磁性材料3，上下两端的磁性材料之间设置间隔件4。
所述磁性材料3为铷铁硼磁体，其大小直径在3~5mm，长度5~7mm。所述磁性材料以及间隔件为圆管结构，在微创手术导航需要相应的导引针做手术引导，圆管结构的直孔可以配合导引针在术中使用。
通过检测磁性导航椎弓根钉本身的磁场的变化，可以较为方便的监控术中进钉位置、角度、深度等数据，提高手术成功率和手术质量及满足微创手术的需求。
同时当磁性导航椎弓根钉发生断裂时，则其磁场亦会发生变化，通过获得磁场是否变化判断该磁性导航椎弓根钉是否发生断裂。
通过磁性导航椎弓根钉内部设置的磁性材料的弱磁源性型号，可实现与目前医疗设备领域中，医疗电磁导航设备或医疗电磁监控设备陪匹配。该磁性导航椎弓根钉保持了传统椎弓根钉的结构特点及使用特点，该椎弓根钉也可采用传统椎弓根钉配套手术器械进行产品的植入操作，无需采用特殊的手术器械进行植入操作。
在产品植入后，通过追踪单一椎弓根钉内部的磁性材料的磁信号，并对磁信号及信号间的关系进行分析，得出椎弓根钉受力的方向和形态，同时也可以判定椎弓根钉是否断裂失效；通过追踪多钉内部磁性材料的磁信号，并对磁信号及信号间的关系进行分析，可以分析钉棒系统受力的形态，同时可以判断钉棒系统是否失效，是否需要取出。
实施例1：所述螺纹钉杆2与U型钉壁1一体成型。
所述通孔沿螺纹钉杆轴线的延伸到U型钉壁的底部。
实施例2：所述螺纹钉杆2的后端设有球形的臼体7，所述U型钉壁1的底部设有与臼体7相适配的臼杯8，臼体7容置于臼杯8内且两者滑动配合，在臼杯8的前端设有对螺纹钉杆2进行限位的限位部。
所述限位部包括卡圈10和挡圈9。所述挡圈套设在U型钉壁的臼杯中，然后将臼体套在挡圈内，挡圈限位臼体往上移动，而卡圈将臼体卡在臼杯中，卡圈限位臼体脱出臼杯
所述U型钉壁的外表面设有盲孔6，盲孔6的设置的目的是协助压棒器在压棒时起到定位支撑的作用。
实施例3，在所述U型钉壁1的外表面设置槽口5，设置槽口5的目的在于当手术完成后，方便折断U型钉壁，将折断部分取出体外。
实施例不应视为对本发明的限制，但任何基于本发明的精神所作的改进，都应在本发明的保护范围之内。
Claims (4)
1.一种磁性导航椎弓根钉，其特征在于：所述的磁性导航椎弓根钉，包括螺纹钉杆和U型钉壁，U型钉壁的内壁上设有内螺纹，所述螺纹钉杆内设置有沿螺纹钉杆轴线的通孔，所述通孔的上下两端设置磁性材料，上下两端的磁性材料之间设置间隔件；所述磁性材料为铷铁硼磁体；所述磁性材料以及间隔件为圆管结构；所述通孔沿螺纹钉杆轴线延伸到U型钉壁的底部；所述U型钉壁的外表面设有盲孔；所述U型钉壁的外表面设置槽口；
当磁性导航椎弓根钉发生断裂时，则其磁场会放生变化，通过获得磁场是否变化判断该磁性导航椎弓根钉是否发生断裂；
通过追踪单一椎弓根钉内部的磁性材料的磁信号，并对磁信号及信号间的关系进行分析，得出椎弓根钉受力的方向和形态，同时也能够判定椎弓根钉是否断裂失效；通过追踪多钉内部磁性材料的磁信号，并对磁信号及信号间的关系进行分析，能够分析钉棒系统受力的形态，同时能够判断钉棒系统是否失效，是否需要取出。
2.根据权利要求1所述的一种磁性导航椎弓根钉，其特征在于：所述螺纹钉杆与U型钉壁一体成型。
3.根据权利要求1所述的一种磁性导航椎弓根钉，其特征在于：所述螺纹钉杆的后端设有球形的臼体，所述U型钉壁的底部设有与臼体相适配的臼杯，臼体容置于臼杯内且两者滑动配合，在U型臼杯的前端设有对螺纹钉杆进行限位的限位部。
4.根据权利要求3所述的一种磁性导航椎弓根钉，其特征在于：所述限位部包括卡圈和挡圈。
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| US5127913A (en) * | 1991-04-22 | 1992-07-07 | Thomas Jr Charles B | Apparatus and method for implanting an intramedullary rod |
| CN202637080U (zh) * | 2012-07-06 | 2013-01-02 | 常州市康辉医疗器械有限公司 | 一种微创空心椎弓根螺钉 |
| CN103140168A (zh) * | 2010-05-25 | 2013-06-05 | 药物代谢动力公司 | 用于实时地体内检测脊柱假关节和相邻节段运动的基于惯性的可植入感测系统的方法和装置 |
| CN204016465U (zh) * | 2014-07-11 | 2014-12-17 | 嘉兴德康医疗器械有限公司 | 一种可变角度的髂骨钉 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5127913A (en) * | 1991-04-22 | 1992-07-07 | Thomas Jr Charles B | Apparatus and method for implanting an intramedullary rod |
| CN103140168A (zh) * | 2010-05-25 | 2013-06-05 | 药物代谢动力公司 | 用于实时地体内检测脊柱假关节和相邻节段运动的基于惯性的可植入感测系统的方法和装置 |
| CN202637080U (zh) * | 2012-07-06 | 2013-01-02 | 常州市康辉医疗器械有限公司 | 一种微创空心椎弓根螺钉 |
| CN204016465U (zh) * | 2014-07-11 | 2014-12-17 | 嘉兴德康医疗器械有限公司 | 一种可变角度的髂骨钉 |
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