Motor driven rotary input circular stapler with modular end effector

An apparatus for stapling tissue, the apparatus comprising:

• (a) a stapling assembly, wherein the stapling assembly comprises:
• (i) an anvil,
• (ii) a staple deck,
• (iii) a staple driver operable to drive staples through the staple deck and toward the anvil,
• (iv) a first drive member, and
• (v) a second drive member;
• and
• (b) a drive shaft operatively coupled with the stapling assembly, wherein the drive shaft is movable relative to the stapling assembly between a first shaft position and a second shaft position,
• wherein in the first shaft position, the drive shaft is configured to drive the first drive member to move the anvil relative to the staple deck,
• wherein in the second shaft position, the drive shaft is configured to drive the second drive member to move the staple driver relative to the staple deck.

An apparatus for stapling tissue, the apparatus comprising:

• (a) a staple deck having an annular array of openings;
• (b) a staple driver operable to drive staples through the openings;
• (c) a trocar projecting from the staple deck and configured to couple with an anvil;
• (d) a first rotary drive member operatively coupled with the trocar, wherein the first rotary drive member is rotatable relative to the staple deck to move the trocar longitudinally relative to the staple deck;
• and
• (e) a second rotary drive member operatively coupled with the staple driver, wherein the second rotary drive member is rotatable relative to the staple deck to urge the staple driver to drive staples through the openings,
• wherein the first rotary drive member and the second rotary drive member are rotatable independently relative to each other.

An apparatus for stapling tissue, the apparatus comprising:

• (a) a staple deck;
• (b) an anvil configured to confront the staple deck;
• (c) a staple driver operable to drive staples through the staple deck toward the anvil;
• (d) a first rotary drive member configured to rotate relative to the staple deck to move the anvil longitudinally relative to the staple deck;
• (e) a second rotary drive member;
• and
• (f) a translating drive member coupled with the second rotary drive member and the staple driver, wherein the translating drive member is configured to translate longitudinally relative to the staple deck in response to rotation of the second rotary drive member relative to the translating drive member,
• wherein the staple driver is configured to move longitudinally relative to the staple deck in response to longitudinal translation of the translating drive member relative to the staple deck.