Circular surgical staplers with foldable anvil assemblies
First Claim
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1. A circular surgical stapler with foldable anvil assembly, the circular surgical stapler comprising:
- a shaft assembly;
a stapling head operably attached to said shaft assembly;
an axially movable anvil shaft comprising a distal end portion, said anvil shaft being selectively axially movable so as to move said distal end portion relative to said stapling head; and
a foldable anvil assembly operably supported on said anvil shaft, said foldable anvil assembly comprising;
an outer anvil plate assembly movably coupled to said anvil shaft; and
an inner anvil plate assembly movably coupled to said anvil shaft and selectively movable between a folded configuration to a radially deployed configuration upon application of an axial deployment motion thereto, said inner anvil plate assembly located radially inboard of said outer anvil plate assembly when in said folded configuration and when said inner anvil plate assembly is oriented in said radially deployed configuration, said inner anvil plate assembly operably retains said outer anvil plate assembly in a radially expanded annular configuration.
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Abstract
Circular stapling instruments and anvil assemblies. The anvil assemblies may have collapsible anvil support members that may be inserted through an opening in a patient and then expanded to be attached to an anvil plate assembly that has a staple-forming surface thereon. The anvil support member is attachable to the anvil plate assembly in such a way that when the anvil assembly is coupled to the stapling head of a circular stapler, the staple-forming surface is in substantial registry with the staples supported in the stapling head. A variety of different anvil support members and anvil plate assemblies are disclosed.
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Citations
18 Claims
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1. A circular surgical stapler with foldable anvil assembly, the circular surgical stapler comprising:
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a shaft assembly; a stapling head operably attached to said shaft assembly; an axially movable anvil shaft comprising a distal end portion, said anvil shaft being selectively axially movable so as to move said distal end portion relative to said stapling head; and a foldable anvil assembly operably supported on said anvil shaft, said foldable anvil assembly comprising; an outer anvil plate assembly movably coupled to said anvil shaft; and an inner anvil plate assembly movably coupled to said anvil shaft and selectively movable between a folded configuration to a radially deployed configuration upon application of an axial deployment motion thereto, said inner anvil plate assembly located radially inboard of said outer anvil plate assembly when in said folded configuration and when said inner anvil plate assembly is oriented in said radially deployed configuration, said inner anvil plate assembly operably retains said outer anvil plate assembly in a radially expanded annular configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A circular surgical stapler with foldable anvil assembly, the circular surgical stapler comprising:
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a shaft assembly comprising a deployment portion; a stapling head operably attached to said shaft assembly; an axially movable anvil shaft comprising a distal end portion, said anvil shaft being selectively axially movable so as to move said distal end portion relative to said stapling head; and a foldable anvil assembly operably supported on said anvil shaft, said foldable anvil assembly comprising; an outer anvil plate assembly movably coupled to said anvil shaft; and an inner anvil plate assembly pivotally coupled to said anvil shaft and selectively movable between a folded configuration to a radially deployed configuration upon contact with said deployment portion, said inner anvil plate assembly located radially inboard of said outer anvil plate assembly when in said folded configuration and when said inner anvil plate assembly is oriented in said radially deployed configuration, said inner anvil plate assembly operably retains said outer anvil plate assembly in a radially expanded annular configuration. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification