CN203815517U - 带有弯钉沟的外科吻合钉成形槽 - Google Patents

带有弯钉沟的外科吻合钉成形槽 Download PDF

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CN203815517U
CN203815517U CN201420058105.8U CN201420058105U CN203815517U CN 203815517 U CN203815517 U CN 203815517U CN 201420058105 U CN201420058105 U CN 201420058105U CN 203815517 U CN203815517 U CN 203815517U
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anastomosis staple
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张祖仁
张奕奕
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SHANGHAI MEDICAL INSTRUMENTS CO Ltd
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B17/07207Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/11Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
    • A61B17/115Staplers for performing anastomosis in a single operation
    • A61B17/1155Circular staplers comprising a plurality of staples
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214Stapler heads
    • A61B2017/07257Stapler heads characterised by its anvil
    • A61B2017/07264Stapler heads characterised by its anvil characterised by its staple forming cavities, e.g. geometry or material

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Abstract

一种带有弯钉沟的外科吻合钉成形槽,实现在旋转体以钉砧的组织接触面的垂直方向的轴线为旋转轴线、以旋转体的进入凹槽的底部紧贴吻合钉成形槽的吻合钉引导线并沿吻合钉成形槽的吻合钉引导线运动时,旋转体在凹槽内所形成的轨迹曲面即为组成吻合钉成形槽的弯钉沟的曲面,特别适合先在钉砧的组织接触面上加工出技术要求不高的吻合钉成形槽,留出精加工切削余量,然后再在精雕机等精密高速旋转切削机床上采用以上述旋转体作为切削工具的切削头加工吻合钉成形槽的弯钉沟,从而使得加工成本和加工时间大大降低。

Description

带有弯钉沟的外科吻合钉成形槽
技术领域
本实用新型涉及到各种外科吻合器中使用的吻合钉成形槽,特别涉及到直形吻合器或直形切割吻合器中使用的吻合钉成形槽,也特别涉及到弧形切割吻合器中使用的吻合钉成形槽,还特别涉及到圆形吻合器中使用的吻合钉成形槽,还特别涉及到腔镜外科切割吻合器中使用的吻合钉成形槽,更特别涉及到各种电动外科吻合器中使用的吻合钉成形槽。 
背景技术
各种外科吻合器用于代替外科手术中采用针线徒手吻合操作,正在被广泛地用于人体消化道器官、呼吸道器官和泌尿生殖器官等器官和组织的端端、端侧及侧侧吻合等手术,形成通道的手术、闭合切口的手术和夹紧或切割的手术,特别适用于显露和操作困难的器官和组织的吻合手术,可以减少手术时间,提高手术质量。 
如美国专利公示20050222616的直形切割吻合器、美国专利公示20050247753的弧形切割吻合器、美国专利公示20100200639的腔镜切割吻合器、美国专利公示20110101065的圆形吻合器、美国专利公示20130015230的直形吻合器、美国专利公示20130018361的各种电动的外科吻合器和其他各种手动的、或电动的、或液动的、或气动的外科吻合器中所介绍的:外科吻合器由钉仓组件、钉砧组件和操作机构组成。钉仓组件内有钉仓和安装在钉仓内的吻合钉和推钉块,并可根据使用需要安装切割刀。钉砧组件内的钉砧的组织接触面上有内凹后形成的吻合钉成形槽。钉砧上的吻合钉成形槽与钉仓内的吻合钉的位置相互对应。上述各种外科吻合器的吻合钉和吻合钉成形槽在外科吻合器的使用过程中的作用是:当操作机构将待吻合组织夹紧在相互靠拢的钉砧的组织接触面和钉仓的组织接触面之间后,操作机构通过推动推钉块将吻合钉从钉仓内推出,使吻合钉的钉尖穿透被夹紧的待吻合组织后在钉砧上的吻合钉成形槽上弯曲成形,达到将组织吻合的手术目的。 
由于对被吻合组织的密封和止血的要求,相邻两排或两圈吻合钉的间距被限制在较小的尺寸内,也就是相邻两排或两圈吻合钉成形槽的间距被限制在较小的尺寸内,使得吻合钉成形槽的宽度较小,因此当外科吻合器的吻合钉成形槽的形状、位置和尺寸的精度无法满足吻合钉准确成形的技术要求时,钉仓内的吻合钉的钉尖可能会抵在钉砧的吻合钉成形槽的不合适的位置,甚至可能会抵在钉砧的吻合钉成形槽以外,造成吻合钉成形失败,不能达到将组织准确吻合的手术目的。另一方面,当外科吻合器的吻合钉成形槽的表面粗糙度较大时,钉仓内的吻合钉的钉尖抵在钉砧的表面粗糙的吻合钉成形槽上弯曲成形时,吻合钉弯曲成形的阻力明显增大,既影响吻合钉准确成形,又造成外科吻合器的操作力明显增大,容易引起操作疲劳;同时,吻合钉的钉尖抵在钉砧的表面粗糙的吻合钉成形槽上弯曲成形时发出的噪音,进一步促使操作者产生疲劳的感觉。 
如美国专利公开号20080061109中所介绍的在钉砧的组织接触面上呈矩形的吻合钉成 形槽,美国专利公开号20060124688中所介绍的在钉砧的组织接触面上呈马鞍形的吻合钉成形槽,美国专利公开号20110017799中所介绍的在钉砧的组织接触面上呈三角形的吻合钉成形槽,美国专利公开号20110084113中所介绍的在钉砧的组织接触面上呈两个相互偏置的三角形的吻合钉成形槽。这几种式样的外科吻合器的吻合钉成形槽的令人不满意处是,吻合钉成形槽的形状都很复杂,并且在同一钉砧的组织接触面上往往排列有40个至80个的吻合钉成形槽,需要采用模具压制成形和金属粉末注射烧结成形等方法加工。 
如果采用模具压制成形方法加工吻合钉成形槽,由于吻合钉成形槽的数量多,因此需要80吨左右的压机压制成形;又由于钉砧的组织接触面与压制成形模具上的40个至80个的吻合钉成形槽的成形接触面不可能完全同时接触,而吻合钉成形槽的成形接触面的最狭处仅为0.3mm左右,因此压机的80吨左右的压力集中在个别吻合钉成形槽的成形接触面上,首先造成这个别吻合钉成形槽的成形接触面变形或损坏,使得随后加工成的吻合钉成形槽的形状和尺寸的精度达不到吻合钉准确成形的技术要求,也使得压制成形模具的使用寿命很短;还由于当压制成形模具上的40个至80个的吻合钉成形槽的成形接触面全部压入钉砧的组织接触面内时,钉砧发生复杂的塑性变形,可能会使得加工成的吻合钉成形槽及其周围部位的位置和尺寸的精度达不到吻合钉准确成形的技术要求;另外,为了达到吻合钉成形槽的表面粗糙度的技术要求,在采用模具压制成形方法加工吻合钉成形槽前,需要精密抛光钉砧的组织接触面,该工序增加了加工成本和加工时间。 
如果采用金属粉末注射烧结成形方法加工吻合钉成形槽,由于金属粉末注射烧结成形加工成的吻合钉成形槽的形状、位置和尺寸的精度以及表面粗糙度均无法满足吻合钉准确成形的技术要求,因此需要对吻合钉成形槽进行二次加工。 
另外,采用模具压制成形和金属粉末注射烧结成形等方法加工,对于每种规格、每种型号的外科吻合器的吻合钉成形槽,均需要配备一套专用的精度要求很高的模具,总共需要100多套模具才能配齐,使得加工成本和保养成本相当高。 
如果采用金属切削加工方法加工吻合钉成形槽,由于现有的吻合钉成形槽的形状都很复杂,由许多曲面组成,各曲面的结合处存在许多小曲率半径的拐角,因此各个吻合钉成形槽需要用细小的切削工具前后左右进刀几次才能完成加工,细小的切削工具也容易损坏,使得40个至80个的吻合钉成形槽的加工成本相当高、加工时间相当长。 
因此外科吻合器的吻合钉成形槽还需改进。 
由上述显然可以看出,现在已经设计了大量不同式样的外科吻合器,并且新的外科吻合器的吻合钉成形槽的研制工作仍在继续,以便对每年世界上大量使用的外科吻合器作进一步的改进,既达到将组织可靠吻合的手术目的,又达到便于使用、节省成本的目的。 
实用新型内容
本实用新型的目的在于提出一种带有弯钉沟的外科吻合钉成形槽,实现在旋转体以钉砧的组织接触面的垂直方向的轴线为旋转轴线、以旋转体的进入凹槽的底部紧贴吻合钉成形槽的吻合钉引导线并沿吻合钉成形槽的吻合钉引导线运动时,旋转体在凹槽内所形成的轨迹曲面即为组成吻合钉成形槽的弯钉沟的曲面,特别适合先在钉砧的组织接触面上采用金属切削、模具压制成形或金属粉末注射烧结成形等方法加工成的形状、位置和尺寸的精度以及表面粗糙度的技术要求不高的吻合钉成形槽,并在吻合钉成形槽的吻合钉引导线处留出精加工切削余量,然后再在精雕机等精密高速旋转切削机床上采用以上述旋转体作为刀具切削工具或磨具切削工具的切削头、沿吻合钉成形槽的吻合钉引导线精加工吻合钉成形槽的弯钉沟,从而使得本实用新型的吻合钉成形槽在吻合钉引导线处被加工成的形状、位置和尺寸的精度以及表面粗糙度均优于采用现有的模具压制成形和金属粉末注射烧结成形等方法加工成的形状、位置和尺寸的精度以及表面粗糙度。各种吻合钉成形槽的弯钉沟的所有加工参数可以保存在精雕机等精密高速旋转切削机床的数字控制电路的内存中,以备随时调用并可根据需要随时修改,使得加工成本和加工时间大大降低。 
本实用新型的目的是通过下述技术方案实现的: 
本实用新型的带有弯钉沟的外科吻合钉成形槽排列在钉砧的组织接触面上。各个吻合钉成形槽由两个凹槽组成。在钉砧的组织接触面上内凹后形成的凹槽位于吻合钉成形槽的两端处为入钉面、位于吻合钉成形槽的中部处为出钉面。在凹槽的两侧有侧面、底部有底面。 
凹槽的底面上有从入钉面延伸到出钉面的呈沟状的弯钉沟。弯钉沟的入钉面和出钉面的最深处形成吻合钉成形槽的吻合钉引导线。 
在旋转体以钉砧的组织接触面的垂直方向的轴线为旋转轴线、以旋转体的进入凹槽的底部紧贴吻合钉成形槽的吻合钉引导线并沿吻合钉成形槽的吻合钉引导线运动时,旋转体在凹槽内所形成的轨迹曲面即为组成吻合钉成形槽的弯钉沟的曲面。 
旋转体的进入钉砧的底部可以为曲面。如旋转体的进入钉砧的底部的曲面的曲率半径为R1,吻合钉成形槽的吻合钉引导线的曲率半径为R2,紧贴吻合钉成形槽的吻合钉引导线的旋转体的底部的曲面的曲率中心的轨迹曲线的曲率半径为R=R1+R2,则当旋转体以钉砧的组织接触面的垂直方向的轴线为旋转轴线、以旋转体的底部的曲面的曲率中心沿轨迹曲线运动时,旋转体在钉砧的凹槽内所形成的轨迹曲面即为组成吻合钉成形槽的凹槽的弯钉沟的曲面。 
旋转体的进入钉砧的底部也可以为圆锥曲面,则旋转体的进入钉砧的底部的圆锥曲面的尖顶处的曲率半径为R1=0,紧贴吻合钉成形槽的吻合钉引导线的旋转体的底部的圆锥曲面的尖顶的轨迹曲线即与吻合钉成形槽的吻合钉引导线重合,当旋转体以钉砧的组织接触面的垂直方向的轴线为旋转轴线、以旋转体的底部的圆锥曲面的尖顶沿吻合钉成形槽的吻合钉引导线运动时,旋转体在钉砧的凹槽内所形成的轨迹曲面即为组成吻合钉成形槽的凹槽的弯钉沟的曲面。 
同一吻合钉成形槽的两个凹槽的弯钉沟内的吻合钉引导线所在的平面可以在同一平面内,也可以相互平行。 
同一吻合钉成形槽的两个凹槽的弯钉沟内的吻合钉引导线与其凹槽的弯钉沟内的出钉面的交点可以相交,也可以相互偏离。 
本实用新型的钉砧可以呈圆形。多个吻合钉成形槽在圆形钉砧的组织接触面上交错排列成至少两圈。圆形钉砧较内侧的吻合钉成形槽的深度可以比圆形钉砧较外侧的吻合钉成形槽的深度浅。圆形钉砧的吻合钉成形槽可以适用于3mm±0.3mm宽度的钉梁的吻合钉。 
本实用新型的钉砧也可以呈线形。多个吻合钉成形槽在线形钉砧的组织接触面上交错排列成至少两排。线形钉砧上可以有刀槽。多个吻合钉成形槽排列在线形钉砧的刀槽的两侧。较靠近线形钉砧上的刀槽的吻合钉成形槽的深度可以比较偏离线形钉砧上的刀槽的吻合钉成形槽的深度浅。 
本实用新型的各种技术方案的外科吻合钉成形槽,根据吻合组织的手术要求,既可以采用本实用新型的某一种技术方案的外科吻合钉成形槽,也可以采用本实用新型的各种技术方案的外科吻合钉成形槽混合使用,还可以采用本实用新型的各种技术方案的外科吻合钉成形槽与现有的各种类型的外科吻合钉成形槽混合使用,例如,某圈或某排选用本实用新型的各种技术方案中的外科吻合钉成形槽,另圈或另排选用现有的各种类型的外科吻合钉成形槽。 
附图说明
图1是表示本实用新型第一实施例的初加工的矩形的外科吻合钉成形槽的外观图; 
图2是表示所采用的旋转体球的外观图; 
图3是表示图2的旋转体球形成外科吻合钉成形槽的弯钉沟的运动轨迹的剖视图; 
图4是表示第一实施例的带有弯钉沟的外科吻合钉成形槽的外观图; 
图5是表示图4的带有弯钉沟的外科吻合钉成形槽的剖视图; 
图6是表示在圆形钉砧的组织接触面上排列两圈图1的初加工的吻合钉成形槽的外观图; 
图7是表示在圆形钉砧的组织接触面上排列两圈图4的带有弯钉沟的吻合钉成形槽的外观图; 
图8是表示本实用新型第二实施例的初加工的中间内凹的矩形外科吻合钉成形槽的外观图; 
图9是表示图2的旋转体球形成外科吻合钉成形槽的弯钉沟的运动轨迹的剖视图; 
图10是表示第二实施例的带有弯钉沟的外科吻合钉成形槽的外观图; 
图11是表示本实用新型第三实施例的初加工的外科吻合钉成形槽的外观图; 
图12至图15是表示图2的旋转体球形成外科吻合钉成形槽的弯钉沟的运动轨迹的外观图和剖视图; 
图16是表示第三实施例的带有弯钉沟的外科吻合钉成形槽的外观图; 
图17是表示在圆形钉砧的组织接触面上排列三圈图8和图11的初加工的吻合钉成形槽的外观图; 
图18是表示在圆形钉砧的组织接触面上排列三圈图10和图16的带有弯钉沟的吻合钉成形槽的外观图; 
图19是表示本实用新型第四实施例的初加工的中间内凹的矩形外科吻合钉成形槽的外观图; 
图20是表示所采用的旋转体圆锥的外观图; 
图21和图22是表示图20的旋转体圆锥形成外科吻合钉成形槽的弯钉沟的运动轨迹的外观图和剖视图; 
图23是表示第四实施例的带有弯钉沟的外科吻合钉成形槽的外观图; 
图24是表示在线形钉砧的组织接触面上排列四排图19的初加工的吻合钉成形槽的外观图; 
图25是表示在线形钉砧的组织接触面上排列四排图23的带有弯钉沟的吻合钉成形槽的外观图。 
具体实施方式
下面用举例方式,结合附图陈述本实用新型的带有弯钉沟的外科吻合钉成形槽的最佳实施例。本实用新型的范围将在权利要求中指出。应当认识到某些或全部附图都是为了说明本实用新型的最佳实施例的说明简图,而并未描绘出所示部分的真实尺寸。参考最佳实施例的详细叙述,将会更加清楚地理解达到本实用新型上述的和其它的目的和优点的实际方式。 
为了便于图示说明本实用新型各种实施例的带有弯钉沟的外科吻合钉成形槽的技术特征、技术方案和技术效果,以下各种实施例中的吻合钉成形槽仅图示外科吻合器中钉砧的一部分,吻合钉成形槽在各种外科吻合器中的整体形状、结构和功能可参考本说明书的背景技术中引用的各篇美国专利公示中的内容。 
图1是表示本实用新型第一实施例的初加工的矩形外科吻合钉成形槽1。吻合钉成形槽1由在钉砧2的组织接触面3上内凹后形成的两个凹槽4和5组成。在凹槽4和5的两侧有侧面6和7。 
如图5所示,本实用新型第一实施例的精加工的带有弯钉沟的外科吻合钉成形槽8的凹槽9和10的底面11和12上有从入钉面13和14延伸到出钉面15和16的呈沟状的弯钉沟17和18。弯钉沟17和18的入钉面13和14和出钉面15和16的最深处形成吻合钉成形槽8的吻合钉引导线19和20。 
如图2至图5所示,如旋转体球21的进入钉砧2的底部的曲面的曲率半径22为R1,吻合钉成形槽8的吻合钉引导线19和20的曲率半径23为R2,紧贴吻合钉成形槽8的吻合钉引导线19和20的旋转体球21的底部的曲面的曲率中心的轨迹曲线24和25的曲率半径26为R=R1+R2,则当旋转体球21以钉砧2的组织接触面3的垂直方向的轴线为旋转轴线、以旋转体球21的底部的曲面的曲率中心沿轨迹曲线24和25运动时,旋转体球21在钉砧2的凹槽4和5内所形成的轨迹曲面27和28即为组成吻合钉成形槽8的凹槽9和10的弯钉沟17和18的曲面。 
如图4和图5所示,吻合钉成形槽8的两个凹槽9和10的吻合钉引导线19和20所 在的平面在同一平面内,两个凹槽9和10的吻合钉引导线19和20与其出钉面15和16的交点相交。 
如图6所示,钉砧30呈圆形。多个初加工的吻合钉成形槽31和32在圆形钉砧30的组织接触面33上交错排列成两圈。圆形钉砧30较内侧的吻合钉成形槽31的深度比圆形钉砧30较外侧的吻合钉成形槽32的深度浅。 
如图7所示,多个精加工的吻合钉成形槽34和35在圆形钉砧30的组织接触面33上交错排列成两圈。圆形钉砧30较内侧的吻合钉成形槽31的弯钉沟36的深度比圆形钉砧30较外侧的吻合钉成形槽32的弯钉沟37的深度浅。圆形钉砧30的吻合钉成形槽31和32既可以适用于3mm宽度的钉梁的吻合钉、也可以适用于4mm宽度的钉梁的吻合钉。 
图8是表示本实用新型第二实施例的初加工的中间内凹的矩形外科吻合钉成形槽40。吻合钉成形槽40由在钉砧41的组织接触面42上内凹后形成的两个凹槽43和44组成。在凹槽43和44的两侧有侧面45和46。 
如图10所示,本实用新型第二实施例的精加工的带有弯钉沟的外科吻合钉成形槽47的凹槽48和49的底面50和51上有从入钉面52和53延伸到出钉面54和55的呈沟状的弯钉沟56和57。弯钉沟56和57的入钉面52和53和出钉面54和55的最深处形成吻合钉成形槽47的吻合钉引导线58和59。 
如图9所示,如旋转体球21的进入钉砧41的底部的曲面的曲率半径22为R1,吻合钉成形槽47的吻合钉引导线58和59的曲率半径60为R2,紧贴吻合钉成形槽47的吻合钉引导线58和59的旋转体球21的底部的曲面的曲率中心的轨迹曲线61和62的曲率半径63为R=R1+R2,则当旋转体球21以钉砧41的组织接触面42的垂直方向的轴线为旋转轴线、以旋转体球21的底部的曲面的曲率中心沿轨迹曲线61和62运动时,旋转体球21在钉砧41的凹槽43和44内所形成的轨迹曲面64和65即为组成吻合钉成形槽47的凹槽48和49的弯钉沟56和57的曲面。 
如图10所示,吻合钉成形槽47的两个凹槽48和49的吻合钉引导线58和59所在的平面在同一平面内,两个凹槽48和49的吻合钉引导线58和59与其出钉面54和55的交点相交。 
图11是表示本实用新型第三实施例的初加工的外科吻合钉成形槽70。吻合钉成形槽70由在钉砧71的组织接触面72上内凹后形成的两个凹槽73和74组成。在凹槽73和74的两侧有侧面75和76。 
如图16所示,本实用新型第三实施例的精加工的带有弯钉沟的外科吻合钉成形槽77的凹槽78和79的底面80和81上有从入钉面82和83延伸到出钉面84和85的呈沟状的弯钉沟86和87。弯钉沟86和87的入钉面82和83和出钉面84和85的最深处形成吻合钉成形槽77的吻合钉引导线88和89。 
如图12至图16所示,如旋转体球21的进入钉砧71的底部的曲面的曲率半径22为R1,吻合钉成形槽77的吻合钉引导线88和89的曲率半径90为R2,紧贴吻合钉成形槽77的吻合钉引导线88和89的旋转体球21的底部的曲面的曲率中心的轨迹曲线91和92 的曲率半径93为R=R1+R2,则当旋转体球21以钉砧71的组织接触面72的垂直方向的轴线为旋转轴线、以旋转体球21的底部的曲面的曲率中心沿轨迹曲线91和92运动时,旋转体球21在钉砧71的凹槽73和74内所形成的轨迹曲面94和95即为组成吻合钉成形槽77的凹槽78和79的弯钉沟86和87的曲面。 
如图16所示,吻合钉成形槽77的两个凹槽78和79的吻合钉引导线88和89所在的平面相互平行,两个凹槽78和79的吻合钉引导线88和89与其出钉面84和85的交点相互偏离。 
如图17所示,钉砧100呈圆形。多个初加工的吻合钉成形槽101、102和103在圆形钉砧100的组织接触面104上交错排列成三圈。圆形钉砧100较内侧的吻合钉成形槽101的深度比圆形钉砧100较外侧的吻合钉成形槽103的深度浅。 
如图18所示,多个精加工的吻合钉成形槽105、106和107在圆形钉砧100的组织接触面104上交错排列成三圈。圆形钉砧100较内侧的吻合钉成形槽105的弯钉沟108的深度比圆形钉砧100较外侧的吻合钉成形槽107的弯钉沟109的深度浅。圆形钉砧100的吻合钉成形槽105、106和107既可以适用于3mm宽度的钉梁的吻合钉、也可以适用于4mm宽度的钉梁的吻合钉。 
图19是表示本实用新型第四实施例的初加工的中间内凹的矩形外科吻合钉成形槽110。吻合钉成形槽110由在钉砧111的组织接触面112上内凹后形成的两个凹槽113和114组成。在凹槽113和114的两侧有侧面115和116。 
如图23所示,本实用新型第四实施例的精加工的带有弯钉沟的外科吻合钉成形槽117的凹槽118和119的底面120和121上有从入钉面122和123延伸到出钉面124和125的呈沟状的弯钉沟126和127。弯钉沟126和127的入钉面122和123和出钉面124和125的最深处形成吻合钉成形槽117的吻合钉引导线128和129。 
如图19至图23所示,旋转体圆锥130的进入钉砧111的底部的圆锥曲面的尖顶处的曲率半径为R1=0,紧贴吻合钉成形槽117的吻合钉引导线128和129的旋转体圆锥130的底部的圆锥曲面的尖顶的轨迹曲线131和132即与吻合钉成形槽117的吻合钉引导线128和129重合,当旋转体圆锥130以钉砧111的组织接触面112的垂直方向的轴线为旋转轴线、以旋转体圆锥130的底部的圆锥曲面的尖顶沿吻合钉成形槽117的吻合钉引导线128和129运动时,旋转体圆锥130在钉砧111的凹槽113和114内所形成的轨迹曲面133和134即为组成吻合钉成形槽117的凹槽118和119的弯钉沟126和127的曲面。 
如图23所示,吻合钉成形槽117的两个凹槽118和119的吻合钉引导线128和129所在的平面在同一平面内,两个凹槽118和119的吻合钉引导线128和129与其出钉面124和125的交点相互偏离。 
如图24所示,钉砧135呈线形。线形钉砧135上有刀槽136。多个初加工的吻合钉成形槽137和138在线形钉砧135的组织接触面139上交错排列在形钉砧135上的刀槽136的两侧。较靠近线形钉砧135上的刀槽136的吻合钉成形槽137的深度比较偏离线形钉砧135上的刀槽136的吻合钉成形槽138的深度浅。 
如图25所示,多个精加工的吻合钉成形槽140和141在线形钉砧135的组织接触面139上交错排列在线形钉砧135上的刀槽136的两侧。较靠近线形钉砧135上的刀槽136的吻合钉成形槽140的深度比较偏离线形钉砧135上的刀槽136的吻合钉成形槽141的深度浅。 
根据上述详细介绍可知,与现有的吻合钉成形槽相比,本实用新型的带有弯钉沟的外科吻合钉成形槽具有如下技术效果: 
由于对被吻合组织的密封和止血的要求,相邻两排或两圈吻合钉的间距被限制在较小的尺寸内,也就是相邻两排或两圈吻合钉成形槽的间距被限制在较小的尺寸内,使得吻合钉成形槽的宽度较小,因此当外科吻合器的吻合钉成形槽的形状、位置和尺寸的精度无法满足吻合钉准确成形的技术要求时,钉仓内的吻合钉的钉尖可能会抵在钉砧的吻合钉成形槽的不合适的位置,甚至可能会抵在钉砧的吻合钉成形槽以外,造成吻合钉成形失败,不能达到将组织准确吻合的手术目的。另一方面,当外科吻合器的吻合钉成形槽的表面粗糙度较大时,钉仓内的吻合钉的钉尖抵在钉砧的表面粗糙的吻合钉成形槽上弯曲成形时,吻合钉弯曲成形的阻力明显增大,既影响吻合钉准确成形,又造成外科吻合器的操作力明显增大,容易引起操作疲劳;同时,吻合钉的钉尖抵在钉砧的表面粗糙的吻合钉成形槽上弯曲成形时发出的噪音,进一步促使操作者产生疲劳的感觉。 
现有的吻合钉成形槽的形状都很复杂,并且在同一钉砧的组织接触面上往往排列有40个至80个的吻合钉成形槽,需要采用模具压制成形和金属粉末注射烧结成形等方法加工。 
如果采用模具压制成形方法加工吻合钉成形槽,由于吻合钉成形槽的数量多,因此需要80吨左右的压机压制成形;又由于钉砧的组织接触面与压制成形模具上的40个至80个的吻合钉成形槽的成形接触面不可能完全同时接触,而吻合钉成形槽的成形接触面的最狭处仅为0.3mm左右,因此压机的80吨左右的压力集中在个别吻合钉成形槽的成形接触面上,首先造成这个别吻合钉成形槽的成形接触面变形或损坏,使得随后加工成的吻合钉成形槽的形状和尺寸的精度达不到吻合钉准确成形的技术要求,也使得压制成形模具的使用寿命很短;还由于当压制成形模具上的40个至80个的吻合钉成形槽的成形接触面全部压入钉砧的组织接触面内时,钉砧发生复杂的塑性变形,可能会使得加工成的吻合钉成形槽及其周围部位的位置和尺寸的精度达不到吻合钉准确成形的技术要求;另外,为了达到吻合钉成形槽的表面粗糙度的技术要求,在采用模具压制成形方法加工吻合钉成形槽前,需要精密抛光钉砧的组织接触面,该工序增加了加工成本和加工时间。 
如果采用金属粉末注射烧结成形方法加工吻合钉成形槽,由于金属粉末注射烧结成形加工成的吻合钉成形槽的形状、位置和尺寸的精度以及表面粗糙度均无法满足吻合钉准确成形的技术要求,因此需要对吻合钉成形槽进行二次加工。 
另外,采用模具压制成形和金属粉末注射烧结成形等方法加工,对于每种规格、每种型号的外科吻合器的吻合钉成形槽,均需要配备一套专用的精度要求很高的模具,总共需要100多套模具才能配齐,使得加工成本和保养成本相当高。 
如果采用金属切削加工方法加工吻合钉成形槽,由于现有的吻合钉成形槽的形状都很 复杂,由许多曲面组成,各曲面的结合处存在许多小曲率半径的拐角,因此各个吻合钉成形槽需要用细小的切削工具前后左右进刀几次才能完成加工,细小的切削工具也容易损坏,使得40个至80个的吻合钉成形槽的加工成本相当高、加工时间相当长。 
根据外科吻合钉弯曲成形的过程可知:吻合钉弯曲成形是沿着吻合钉成形槽的凹槽底部的吻合钉引导线完成的,因此为了达到吻合钉准确成形的目的,对吻合钉成形槽在吻合钉引导线处的形状、位置和尺寸的精度以及表面粗糙度的技术要求很高;吻合钉成形槽的凹槽的侧面仅仅是起到了引导吻合钉的钉尖进入吻合钉成形槽的凹槽底部的吻合钉引导线处的作用,因此吻合钉成形槽的凹槽的侧面即使形状、位置和尺寸的精度以及表面粗糙度的技术要求不很高,也不会影响吻合钉准确成形。 
本实用新型的带有弯钉沟的外科吻合钉成形槽,实现在旋转体以钉砧的组织接触面的垂直方向的轴线为旋转轴线、以旋转体的进入凹槽的底部紧贴吻合钉成形槽的吻合钉引导线并沿吻合钉成形槽的吻合钉引导线运动时,旋转体在凹槽内所形成的轨迹曲面即为组成吻合钉成形槽的弯钉沟的曲面,特别适合先在钉砧的组织接触面上采用金属切削、模具压制成形或金属粉末注射烧结成形等方法初加工成的形状、位置和尺寸的精度以及表面粗糙度的技术要求不很高的吻合钉成形槽,并在吻合钉成形槽的吻合钉引导线处留出精加工切削余量,然后再在精雕机等精密高速旋转切削机床上采用以上述旋转体作为刀具切削工具或磨具切削工具的切削头、沿吻合钉成形槽的吻合钉引导线精加工吻合钉成形槽的弯钉沟,从而使得本实用新型的吻合钉成形槽在吻合钉引导线处被加工成的形状、位置和尺寸的精度以及表面粗糙度均优于采用现有的模具压制成形和金属粉末注射烧结成形等方法加工成的形状、位置和尺寸的精度以及表面粗糙度。各种吻合钉成形槽的弯钉沟的所有加工参数可以保存在精雕机等精密高速旋转切削机床的数字控制电路的内存中,以备随时调用并可根据需要随时修改,使得加工成本和加工时间大大降低。 
采用本实用新型的带有弯钉沟的外科吻合钉成形槽:当吻合钉被推向吻合钉成形槽时,如果吻合钉的钉尖直接进入吻合钉成形槽的凹槽的弯钉沟内时,则吻合钉的钉腿沿吻合钉成形槽的凹槽的弯钉沟弯曲成形;如果吻合钉的钉尖偏离吻合钉成形槽的凹槽的弯钉沟、进入吻合钉成形槽的凹槽的侧面上时,则吻合钉的钉尖从吻合钉成形槽的凹槽的侧面滑入吻合钉成形槽的凹槽的弯钉沟内,然后吻合钉的钉腿沿吻合钉成形槽的凹槽的弯钉沟弯曲成形。由于本实用新型的带有弯钉沟的外科吻合钉成形槽在吻合钉引导线处能够达到很高的形状、位置和尺寸的精度以及表面粗糙度的技术要求,从而达到吻合钉准确成形的目的。 
于是可以看出,上述所陈述的目标,包括由前面说明所显示的那些目标被有效地达到了。这里所述的仅仅是本实用新型申请的典型的最佳实施形式,可以对上述结构作某些变化也不违背本实用新型的精神和范围。本实用新型不局限或被限止于这里所陈述的具体细节,而应如同权利要求的限定中陈述的那样保留对所属领域中等技术人员来说是显而易见的任何改进或改型。 

Claims (10)

1.一种带有弯钉沟的外科吻合钉成形槽,所述吻合钉成形槽排列在钉砧的组织接触面上,各个吻合钉成形槽由两个凹槽组成,在所述钉砧的组织接触面上内凹后形成的所述凹槽位于吻合钉成形槽的两端处为入钉面、位于吻合钉成形槽的中部处为出钉面,在所述凹槽的两侧有侧面、底部有底面;
其特征在于:
所述凹槽的底面上有从所述入钉面延伸到所述出钉面的呈沟状的弯钉沟,所述弯钉沟的入钉面和出钉面的最深处形成吻合钉成形槽的吻合钉引导线;
在旋转体以钉砧的组织接触面的垂直方向的轴线为旋转轴线、以所述旋转体的进入凹槽的底部紧贴所述吻合钉成形槽的吻合钉引导线并沿吻合钉成形槽的吻合钉引导线运动时,旋转体在凹槽内所形成的轨迹曲面即为组成所述吻合钉成形槽的弯钉沟的曲面。
2.根据权利要求1所述的带有弯钉沟的外科吻合钉成形槽,其特征是,所述旋转体的进入所述钉砧的底部为曲面,如旋转体的进入所述钉砧的底部的曲面的曲率半径为R1,所述吻合钉成形槽的吻合钉引导线的曲率半径为R2,紧贴吻合钉成形槽的吻合钉引导线的旋转体的底部的曲面的曲率中心的轨迹曲线的曲率半径为R=R1+R2,则当旋转体以所述钉砧的组织接触面的垂直方向的轴线为旋转轴线、以旋转体的底部的曲面的曲率中心沿所述轨迹曲线运动时,旋转体在钉砧的凹槽内所形成的轨迹曲面即为组成所述吻合钉成形槽的凹槽的弯钉沟的曲面。
3.根据权利要求2所述的带有弯钉沟的外科吻合钉成形槽,其特征是,所述旋转体的进入所述钉砧的底部为圆锥曲面,则所述旋转体的进入钉砧的底部的圆锥曲面的尖顶处的曲率半径为R1=0,紧贴所述吻合钉成形槽的吻合钉引导线的旋转体的底部的圆锥曲面的尖顶的轨迹曲线即与吻合钉成形槽的吻合钉引导线重合,当旋转体以所述钉砧的组织接触面的垂直方向的轴线为旋转轴线、以所述旋转体的底部的圆锥曲面的尖顶沿吻合钉成形槽的吻合钉引导线运动时,旋转体在钉砧的凹槽内所形成的轨迹曲面即为组成所述吻合钉成形槽的凹槽的弯钉沟的曲面。
4.根据权利要求1所述的带有弯钉沟的外科吻合钉成形槽,其特征是,同一所述吻合钉成形槽的两个所述凹槽的弯钉沟内的吻合钉引导线在同一平面内。
5.根据权利要求1所述的带有弯钉沟的外科吻合钉成形槽,其特征是,同一所述吻合钉成形槽的两个所述凹槽的弯钉沟内的吻合钉引导线所在的平面相互平行。
6.根据权利要求1所述的带有弯钉沟的外科吻合钉成形槽,其特征是,所述钉砧呈圆形,多个所述吻合钉成形槽在圆形钉砧的组织接触面上交错排列成至少两圈。
7.根据权利要求6所述的带有弯钉沟的外科吻合钉成形槽,其特征是,所述圆形钉砧较内侧的所述吻合钉成形槽的深度比圆形钉砧较外侧的吻合钉成形槽的深度浅。
8.根据权利要求1所述的带有弯钉沟的外科吻合钉成形槽,其特征是,所述钉砧呈线形,多个所述吻合钉成形槽在线形钉砧的组织接触面上交错排列成至少两排。
9.根据权利要求8所述的带有弯钉沟的外科吻合钉成形槽,其特征是,所述线形钉砧上有刀槽,多个所述吻合钉成形槽排列在所述线形钉砧的刀槽的两侧。
10.根据权利要求9所述的带有弯钉沟的外科吻合钉成形槽,其特征是,较靠近所述线形钉砧上的刀槽的所述吻合钉成形槽的深度比较偏离线形钉砧上的刀槽的吻合钉成形槽的深度浅。
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