Surgical stapler instrument and method for vascular hemostasis

In a surgical stapler instrument for enhancing blood vessel hemostasis of the type having a distal end and a proximal end and a longitudinal axis and an anvil member located at said distal end of said instrument forming a first jaw, a stapler cartridge having an anvil engagement face oppositely mounted to said anvil member at said distal end forming a second jaw and so connected to said anvil member such that body tissue containing said blood vessel may be positioned between said stapler cartridge and said anvil member when said jaws are open and compressively held between said jaws when said jaws are closed, a multiplicity of staples contained in said stapler cartridge, a flexible pad having lateral extremities carried by said stapler cartridge and interposed between said stapler cartridge and said anvil member such that said staples upon election from said cartridge will penetrate through said flexible pad before said body tissue, holding means carried by said stapler cartridge adjacent said anvil engagement face for captively and releasably holding said flexible pad such that during the positioning of said body tissue between said anvil member and said stapler cartridge said flexible pad is captively held by said stapler cartridge and released during the separation of said stapler cartridge from said anvil member after said staples have been formed against said anvil member, a stapler ejector for ejecting said staples from said cartridge such that said staples penetrate through said body tissue and are formed against said anvil, and a cutter member associated with said anvil member and said stapler cartridge for cutting said blood vessel, wherein the improvement comprises said flexible pad having a plurality of axial extending serrations spaced intermediate said lateral extremities of said flexible pad defining a series of cutting regions for reducing the cross-sectional area of said flexible pad though which said cutter member advances during the cutting of said blood vessel.

A surgical stapling method utilizing a surgical stapler instrument for enhancing blood vessel hemostasis where said surgical stapler instrument has a distal end and a proximal end, a longitudinal axis and an anvil member located at said distal end of said instrument forming a first jaw, a stapler cartridge having an anvil engagement face oppositely mounted to said anvil member at said distal end forming a second jaw and so connected to said anvil member such that body tissue containing said blood vessel may be positioned between said stapler cartridge and said anvil member when said jaws are opened and compressively held between said taws when said jaws are closed, said stapler cartridge having a multiplicity of staples contained therein, a stapler injector for ejecting said staples from said cartridge such that said staples penetrate through said body tissue and are formed against said anvil and a cutter member associated with said anvil member and said stapler cartridge for cutting said blood vessel, said method comprising the steps of:

• a) mounting a pair of flexible pads to said anvil engagement face of said stapler cartridge of said surgical stapler instrument where said flexible pads are sufficiently spaced laterally in fixed spaced relationship to define a longitudinally extending void region between said pads for passage through said void region of said cutter member during the cutting of said blood vessel without cutting said pads;
• b) positioning said pair of flexible pads between said body tissue containing said blood vessel and said anvil engagement face of said surgical stapling instrument having at least two parallel rows of staples which can be sequentially ejected from said cartridge and formed against said anvil member of said surgical stapler instrument;
• c) fastening said staples to said body tissue such that said rows of staples angularly intersect said blood vessel;
• d) passing said cutting member through said longitudinally extending void region between said flexible pads and cutting said body tissue intermediate said rows of staples after said staples are formed against said anvil member sufficiently to divide said blood vessel.

In a surgical stapler instrument for enhancing blood vessel hemostasis of the type having a distal end and a proximal end and a longitudinal axis and an anvil member located at said distal end of said instrument forming a first jaw, a stapler cartridge having an anvil engagement face oppositely mounted to said anvil member at said distal end forming a second jaw and so connected to said anvil member such that body tissue containing said blood vessel may be positioned between said stapler cartridge and said anvil member when said jaws are open and compressively held between said jaws when said jaws are closed, a multiplicity of staples contained within said stapler cartridge, a stapler ejector for ejecting said staples from said stapler cartridge such that said staples penetrate through said body tissue and are formed closed against said anvil member, and a cutter member associated with said anvil member and said stapler cartridge for cutting said blood vessel, wherein the improvement comprises:

• a) a pair of flexible pads carried by said stapler cartridge where said stapler pads are sufficiently spaced laterally in fixed spaced relationship to define a longitudinally extending void region between said pads for passage through said void region of said cutter member during the cutting of said blood vessel without cutting said pads, and where said flexible pads are interposed between said stapler cartridge and said anvil member such that said staples upon ejection from said stapler cartridge will penetrate through said flexible pads before said body tissue;
• and
• b) holding means carried by said stapler cartridge adjacent said anvil engagement face for slideably and releasably holding each said flexible pad such that during the positioning of said body tissue between said anvil member and said stapler cartridge each said flexible pad is captively held by said stapler cartridge in said fixed space relationship to permit said cutter member to pass through said void region during the cutting of said blood vessel and slideably released during the separation of said stapler cartridge from said anvil member after said staples have been formed against said anvil member.

In a surgical stapler instrument for enhancing blood vessel hemostasis of the type having a distal end and a proximal end and a longitudinal axis and an anvil member located at said distal end of said instrument forming a first jaw, a stapler cartridge having an anvil engagement face oppositely mounted to said anvil member at said distal end forming a second jaw and so connected to said anvil member such that body tissue containing said blood vessel may be positioned between said stapler cartridge and said anvil member when said jaws are open and compressively held between said jaws when said jaws are closed, a multiplicity of staples contained within said stapler cartridge, a stapler ejector for electing said staples from said stapler cartridge such that said staples penetrate through said body tissue and are formed closed against said anvil, and a cutter member associated with said anvil member and said stapler cartridge for cutting said blood vessel, wherein the improvement comprises:

• a) a pair of flexible pads carried by said stapler cartridge and interposed between said stapler cartridge and said anvil member such that said staples upon ejection from said stapler cartridge will penetrate through said pads before said body tissue;
• and
• b) holding means carried by said stapler cartridge adjacent said anvil engagement face for captively and releasably holding each said flexible pad such that during the positioning of said body tissue between said anvil member and said stapler cartridge each said flexible pad is captively held by said stapler cartridge and released during the separation of said stapler cartridge from said anvil member after said staples have been formed against said anvil member, said holding means comprising a channel bounded in part by said anvil engagement face of said stapler cartridge and having a pair of overhanging arms laterally and oppositely spaced from said longitudinal axis for captively holding said pads where said overhanging arms are sufficiently spaced laterally to permit said anvil member to compressibly bear against said anvil engagement face of said stapler cartridge.

In a surgical stapler instrument for enhancing blood vessel hemostasis of the type having a distal end and a proximal end and a longitudinal axis and an anvil member located at said distal end of said instrument forming a first jaw, a stapler cartridge having an anvil engagement face oppositely mounted to said anvil member at said distal end forming a second jaw and so connected to said anvil member such that body tissue containing said blood vessel may be positioned between said stapler cartridge and said anvil member when said jaws are open and compressively held between said jaws when said jaws are closed, a multiplicity of staples contained in said stapler cartridge, a stapler ejector for ejecting said staples from said cartridge such that said staples penetrate through said body tissue and are formed against said anvil member, and a cutter member associated with said anvil member and said stapler cartridge for cutting said blood vessel, wherein the improvement comprises:

• a) a flexible pad having lateral extremities carried by said stapler cartridge and interposed between said stapler cartridge and said anvil member such that said staples upon ejection from said cartridge will penetrate through said flexible pad before said body tissue;
• and
• b) holding means carried by said stapler cartridge adjacent said anvil engagement face for captively and releasably holding said flexible pad such that during the positioning of said body tissue between said anvil member and said stapler cartridge said flexible pad is captively held by said stapler cartridge and released during the separation of said stapler cartridge from said anvil member after said staples have been formed against said anvil member, and where said holding means comprises a channel bounded in part by said anvil engagement face of said stapler cartridge and having a pair of overhanging arms laterally and oppositely spaced from said longitudinal axis for captively holding said pad where said overhanging arms are sufficiently spaced laterally to permit said anvil member to compressibly bear against said anvil engagement face of said stapler cartridge.