Directionally biased staple and anvil assembly for forming...

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/064 (2006.01) A61B 17/072 (2006.01) A61B 17/115 (2006.01)

Patent

CA 2426206

In accordance with the present disclosure a directionally biased staple is provided for use in all types of surgical staplers having anvil structure against which the staple is formed. The directionally biased staple may be constructed in a wide variety of cross-sectional configurations including rectangular, elliptical, trapezoidal, etc. All of the configurations are distinguished by having a bending region requiring more force to twist or malform the staple than is required to properly form the staple. Preferably, these staples have Moment of Inertia Ratios on the order of between about 1.1 to about 3Ø The staple preferably corresponds in other respects to conventional formed staples, i.e. having at least a pair of leg members interconnected by a crown portion wherein the leg members are formed by direct contact with the anvil. An anvil assembly is also provided for minimizing the malformation of staples.

Selon la présente invention, une agrafe sollicitée de manière directionnelle peut être utilisée dans tous les types d'agrafeuses chirurgicales présentant une structure d'enclume contre laquelle l'agrafe se forme. L'agrafe sollicitée de manière directionnelle peut présenter des configurations de coupe transversale extrêmement variées y compris des configurations rectangulaires, elliptiques, trapézoïdales etc. Toutes ces configurations se distinguent par la présence d'une zone de courbure exigeant plus de force pour tordre ou malformer l'agrafe qu'il n'est nécessaire d'en fournir pour former l'agrafe correctement. De préférence, ces agrafes présentent un rapport de moments d'inertie approximativement compris entre 1,1 et 3,0. Pour les autres caractéristiques, l'agrafe correspond de préférence aux agrafes formées de manière classique, c'est-à-dire que cette agrafe comprend au moins une paire de bras interconnectés par une partie de sommet de voûte, les bras étant formés par contact direct avec l'enclume. L'invention concerne également un ensemble enclume qui permet de réduire à un minimum la malformation des agrafes.

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