FIELD: medical equipment.
SUBSTANCE: invention relates to surgical instruments. Surgical instrument for treating a patient's tissue comprises a barrel assembly, an end effector and a staple cassette. End effector extends from the shaft assembly along the central line of the branch. Said end effector contains a first jaw and a second jaw. First jaw has a stop configured to form staples pressed to the anvil. First and second jaws are configured to transition from open configuration to closed configuration. Staple cartridge is placed in the second branch. Staple cartridge comprises a platform, brackets, a first ejectors assembly and a second ejector assembly. Platform faces the limit stop. Platform forms holes for staples. Staple holes comprise a first row of staple holes and a second row of staple holes. First and second rows of staple holes form the first inter-row central line between them. Brackets are located in holes for brackets. First ejectors unit is located on the first inter-row central line. First pusher is asymmetrical along the first inter-row central line and is made with possibility to push out the first part of staples. Second ejectors unit is located on the first inter-row central line. Second ejectors assembly is asymmetrical along the first inter-row central line and is configured to eject the second part of the staples. Each of the first and second ejectors assembly includes three staple ejectors connected by means of a drive cam passing between them. In one ejectors assembly, one stapler ejector is provided on the first side of the row and two staple pushers are provided on the second side of the row and are aligned longitudinally, and in the other ejectors assembly two staple pushers are provided on the first row side and aligned longitudinally and one staple pusher is provided on the row second side. First and second assemblies of ejectors alternate so that first and second assemblies of ejectors overlap in a direction across the first inter-row center line, to form displaced and overlapping rows of staples in tissue.
EFFECT: use of the invention enables tissue cross-linking and dissection in the patient.
15 cl, 20 dwg
