A multidirectional locking intramedullary nail, which belongs to medical equipment, the main nail is provided with a front direction locking nail straight through pin hole A, inside and outside the direction of locking nail locking nail holes inside and outside across the B, two and 45 degrees or across the direction and is inclined to wear inside and outside locking nail holes C, proximal end is provided with a front direction before and after the locking nail straight through pin hole A, two cross each other at 90 degree and with the recent end lock pin hole A 45 degrees before, before the locking nail, after outgoing after flat lock nail holes D, two locking nail holes C, inside and outside the direction and wore flat or a 45 degrees outside the diagonal direction and across the inside and outside the lock pin hole B. The utility model has the advantages that the angle stability between the main nail and the locking nail is stronger; the near end and the far end are provided with multidirectional locking; and the locking and fixing action of the high thread cancellous bone lock nail on the end fracture is surrounded by extrusion.
【技术实现步骤摘要】
本技术属于一种医疗器械,特别涉及一种锁定多向带锁髓内钉。
技术介绍
胫骨近、远端骨折,特别是涉及关节内的平台骨折和pilon骨折是常见的关节内骨折,手术是治疗胫骨平台和pilon骨折的主要方法,常采用切开复位钢板螺钉内固定术,由于非锁定钢螺钉是偏心性髓外支撑固定,钢板与对侧的骨折难以得到对称固定。所以临床常采用双钢板或三钢板环抱支撑固定,然而这种固定方式会对局部软组织造成严重损伤。锁定钢板的问世是胫骨平台骨折治疗的一个进步,其提供了髓外相对的对称支撑固定,特别是复杂型骨折,疗效可靠。但由于钢板螺钉固定均需要切开和分离较大范围的软组织,所以对已经损伤的软组织无疑是加重损伤并带来较高的术后感染的风险。目前的带锁髓内钉只适用于胫骨干的骨折,对于胫骨远、近端的骨折是禁忌症,原因是①目前临床使用的胫骨带锁髓内钉的主钉与锁钉之间无“角稳定”功能,即相互之间没有锁定功能;②胫骨带锁髓内钉近、远端锁钉孔少,且无科学的多向锁定功能;③锁钉本身不具有松质骨螺钉功能,对平台骨折没有环抱作用;④涉及到关节内骨折,在限制性锁定固定的基础上,尚需要非限制性松质骨拉力螺钉辅助固定,即“筏排钉 ...
【技术保护点】
一种锁定多向带锁髓内钉,包括主钉和锁钉,所述主钉为杆状,在主钉的近端和远端之间设有向前的弯角,其特征在于:所述主钉的远端设有四个锁钉孔,分别是最远端一个前后方向锁钉孔A,锁钉前后直穿入锁钉孔A,近侧一个内外方向锁钉孔B,锁钉内外横穿锁钉孔B,中间两个内外方向锁钉孔Ca和Cb,锁钉孔Ca和Cb分别为正水滴形和反水滴形,锁钉孔Ca和Cb在主钉内斜向连通,构成45°的水滴型通道,锁钉内外横穿锁钉孔Ca和Cb,或呈45°穿过水滴型通道内外斜穿锁钉孔Ca和Cb;所述主钉的近端设有八个锁钉孔,分别是最近端一个前后方向锁钉孔A,锁钉前后直穿锁钉孔A,在其下方的两层锁钉孔D,每层锁钉孔D包 ...
【技术特征摘要】
1.一种锁定多向带锁髓内钉,包括主钉和锁钉,所述主钉为杆状,在主钉的近端和远端之间设有向前的弯角,其特征在于:所述主钉的远端设有四个锁钉孔,分别是最远端一个前后方向锁钉孔A,锁钉前后直穿入锁钉孔A,近侧一个内外方向锁钉孔B,锁钉内外横穿锁钉孔B,中间两个内外方向锁钉孔Ca和Cb,锁钉孔Ca和Cb分别为正水滴形和反水滴形,锁钉孔Ca和Cb在主钉内斜向连通,构成45°的水滴型通道,锁钉内外横穿锁钉孔Ca和Cb,或呈45°穿过水滴型通道内外斜穿锁钉孔Ca和Cb;所述主钉的近端设有八个锁钉孔,分别是最近端一个前后方向锁钉孔A,锁钉前后直穿锁钉孔A,在其下方的两层锁钉孔D,每层锁钉孔D包括两个相互成90°交叉且与最近端锁钉孔A成45°的锁钉孔D,锁钉从前内向后外或前外向后内直穿每个锁钉孔D,锁钉孔D下方的两个内外方向锁钉孔Ca和Cb,锁钉孔Ca和Cb分别为正水滴形和反水滴形,锁钉孔Ca和Cb在主钉内斜向连通,构成45°的水滴型通...
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。