Abstract: An apparatus includes a body, a shaft, and a stapling head assembly. The shaft extends distally from the body and includes a coupling feature. The coupling feature includes threading or at least one barb. The stapling head assembly is configured to cut and staple tissue. The stapling head assembly is positioned at a distal end of the shaft. The stapling head assembly includes a knife member and a body member. The knife member includes a circular cutting edge configured to cut through tissue. The body member is configured to house the knife member. The body member includes a coupling feature that is configured to mechanically couple with the coupling feature of the shaft. The coupling feature of the body member includes threading or at least one barb.

Abstract: An apparatus includes a body, a shaft, and a stapling head assembly. The shaft extends distally from the body. The stapling head assembly is positioned at a distal end of the shaft. The stapling head assembly includes a staple driver member and a knife member. The staple driver member is configured to drive a plurality of staples into tissue. The knife member is configured to cut through the tissue. The knife member includes a proximal end, a distal end, and a cylindrical body extending between the proximal and distal ends. The cylindrical body includes at least one coupling feature that operatively couples the knife member with the staple driver member.

Abstract: An apparatus includes a body, a shaft, and a stapling head assembly. The shaft extends distally from the body. The stapling head assembly is positioned at a distal end of the shaft. The stapling head assembly includes a staple driver member and a knife member. The staple driver member is configured to drive a plurality of staples into tissue. The knife member is configured to cut through the tissue. The knife member includes a proximal end, a distal end, and a cylindrical body extending between the proximal and distal ends. The cylindrical body includes at least one coupling feature that operatively couples the knife member with the staple driver member.

Abstract: An apparatus includes a body, a shaft, and a stapling head assembly. The shaft extends distally from the body and includes a coupling feature. The coupling feature includes threading or at least one barb. The stapling head assembly is configured to cut and staple tissue. The stapling head assembly is positioned at a distal end of the shaft. The stapling head assembly includes a knife member and a body member. The knife member includes a circular cutting edge configured to cut through tissue. The body member is configured to house the knife member. The body member includes a coupling feature that is configured to mechanically couple with the coupling feature of the shaft. The coupling feature of the body member includes threading or at least one barb.

Abstract: An apparatus includes a body, a shaft, and a stapling head assembly. The body includes a chassis, a bracket, a coupling, and a conical coil. The bracket is configured to move relative to the chassis between first and second positions when selectively activated by a user. The bracket includes an upright member. The conical coil spring is disposed between the bracket and the coupling. The conical coil spring includes a proximal end, a distal end, a conical helical body disposed between the proximal and distal ends, and at least one dead coil disposed at the distal end of the conical coil spring that is configured to prevent the distal end of the conical coil spring from being retained between the bracket and the chassis. The shaft extends distally from the body. The stapling head assembly is positioned at a distal end of the shaft.

Abstract: An apparatus includes a body, a shaft, and a stapling head assembly. The body includes a chassis, a bracket, a coupling, and a conical coil. The bracket is configured to move relative to the chassis between first and second positions when selectively activated by a user. The bracket includes an upright member. The conical coil spring is disposed between the bracket and the coupling. The conical coil spring includes a proximal end, a distal end, a conical helical body disposed between the proximal and distal ends, and at least one dead coil disposed at the distal end of the conical coil spring that is configured to prevent the distal end of the conical coil spring from being retained between the bracket and the chassis. The shaft extends distally from the body. The stapling head assembly is positioned at a distal end of the shaft.