Covidien LP

Stephen Ryan Casey

Thomas Wenchell

Patrick D Mozdzierz

Christopher P Penna

David N Fowler

Charles R Kollar

Stephen R Paul

David E Valentine

Joseph M Guerrera

Steven H Joyce

David Valentine, Jr

Haley E Strassner

Peter T Collings

Alexander J Hart

Christopher M Meehan

James P Delbo

Drew R Seils

Sonya A Bader

John Hyrb

Justin Williams

A surgical device includes a handle assembly having a power source; a motor coupled to the power source; and a controller configured to control the motor. The surgical device also includes an adapter assembly configured to selectively couple to the handle assembly; a reload configured to selectively couple to a distal portion of the adapter assembly, the reload including a plurality of fasteners; and an anvil assembly selectively couplable to the distal portion of the adapter assembly, the anvil assembly being movable relative to the reload. The controller is further configured to control the motor to move the anvil assembly from a starting position to a compressed position thereby compressing tissue at a target clamping force between the anvil assembly and the reload.

Handheld electromechanical surgical system

A circular stapling device includes a handle assembly including a processor, an adapter assembly including a trocar assembly and a strain gauge assembly, a reload assembly operably secured to the adapter assembly, the reload assembly including a staple cartridge, and an anvil assembly releasably secured to the trocar assembly and moveably positioned relative to the staple cartridge between a spaced position and a clamped position. The processor includes software for determining when tissue clamped between the staple cartridge and the anvil assembly has achieved a predetermined tissue relaxation percent. A method of optimizing tissue relaxation during a stapling procedure includes clamping tissue between an anvil assembly and a reload assembly, calculating a tissue relaxation percent of the clamped tissue, and initiating a stapling sequence when the tissue relaxation percent equals or is less than a predetermined tissue relaxation percent.

Tissue relaxation monitoring for optimized tissue stapling

A cartridge assembly for selective connection to a surgical stapling apparatus includes a body portion, a tissue contact surface defining staple retention slots, staples, a collar assembly and a staple sheath. Each of the staples is received in a respective one of the staple retention slots of the tissue contact surface. The collar assembly is movably mounted to the body portion. The staple sheath is coupled to the collar assembly and positioned to cover the staple retention slots. The staple sheath is selectively movable relative to the tissue contact surface.

Surgical stapling apparatus with staple sheath

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Wallingford, CT, United States of America

Stephen Ryan Casey