Surgical stapling apparatus

A surgical stapling apparatus is provided including a cartridge assembly defining a tissue contacting surface; an anvil assembly defining a tissue contacting surface; and a surgical buttress releasably secured to at least one of the tissue contacting surface of the cartridge assembly and the tissue contacting surface of the anvil assembly by at least one anchor. A loading unit is provided including a surgical buttress releasably secured to an anvil assembly and/or a staple cartridge secured thereto by at least one anchor, and a drive assembly including a knife blade, wherein movement of the drive assembly from a proximal position to a distal position results in the knife blade cutting the at least one anchor and freeing each surgical buttress from the anvil assembly and/or cartridge assembly.

Medical instrument electronically energized using drive cables

An electrically energized medical instrument uses one or more drive cables to both actuate mechanical components of a wrist mechanism or an effector and to electrically energize the effector. Electrical isolation can be achieved using an insulating main tube through which drive cables extend from a backend mechanism to the effector, an insulating end cover that leaves only the desired portions of the effector exposed, and one or more seals to prevent electrically conductive liquid from entering the main tube. Component count and cost may be further reduced using a pair of pulleys that are shared by four drive cables.

Surgical Gasket

A gasket for use with a surgical stapling apparatus is disclosed. The gasket comprises a diisocyanate end-capped poly(ether ester). The diisocyanate is selected from the following: aromatic, aliphatic and acyclic isocyanates. The poly(ether ester) can further comprise at least one polyol and at least one poly acid. The gasket is desirably bioabsorbable.

Surgical retraction mechanism

A retraction mechanism has been developed for use with a hand held surgical apparatus. The retraction mechanism includes a motor, a first speed reducing mechanism, a clutch mechanism incorporating a second speed reducing mechanism, and a shaft. The first speed reducing mechanism is configured to be driven by a motor. The second speed reducing mechanism has a locked state and an unlocked state. In addition, the clutch mechanism is disposed in mechanical cooperation with the first speed reducing mechanism. The shaft is configured to rotate upon activation of the motor the second speed reducing mechanism is in the locked state. The rotation of the shaft retracts a firing drive of the hand held surgical apparatus.

Bipolar cautery instrument

A cautery instrument includes a brush-type contact providing a sliding electrical connection to a jaw of the instrument. To provide isolation, the jaws may have ends in cavities in a clevis made of an insulating material. Non-conducting drive cables can be attached to the jaws using high friction paths that prevent or resist slippage of the cables relative to the jaws.

Surgical Gasket

An annular gasket for use with a circular stapling apparatus in performing an anastomosis is disclosed. The annular gasket comprises a substantially circular body portion having an upper surface, a lower surface, an outer terminal edge, and an inner terminal edge defining an aperture therein. The body portion defines a central longitudinal axis through the aperture. The annular gasket also comprises a plurality of pores extending through the body portion. Each of the pores is disposed between the outer terminal edge and the inner terminal edge and extends from the upper surface to the lower surface such that each pore defines an axis that is substantially parallel to the central longitudinal axis. An outer region of the gasket is disposed radially outward of the plurality of pores and the outer region is substantially non-porous.

Backend mechanism for four-cable wrist

A transmission or backend mechanism for a medical instrument connects four cables to three motorized degrees of freedom. The transmission employs a first drive mechanism attached to first and second cables and a second drive mechanism attached to third and fourth cables, where each mechanism can include a capstan or a lever system that pulls in one cable while simultaneously feeding out another cables. A third drive mechanism has a first pivot about which a portion of the first drive mechanism rotates, a second pivot about which a portion of the second drive mechanism rotates, and a third pivot about which the third drive mechanism rotates. Rotation of the third drive mechanism about the third pivot pulls in at least one of the first and second cables and feeds out at least one of the third and fourth cables.

Modular tool with signal feedback

Implementations of modular tools and methods of operating modular tools are described in the present disclosure. A modular tool according to one of several possible embodiments comprises a handle portion and a distal portion. The handle portion is configured to be manipulated by a user. The distal portion is configured to be attached to the handle portion, but is further configured to be removable from the handle portion by the user. Manipulation of the handle portion causes movement of one or more components of the distal portion. The distal portion is further configured to sense one or more parameters and transmit the sensed parameters to the handle portion.

UNIVERSAL MEDIA BAR FOR CONTROLLING DIFFERENT TYPES OF MEDIA

Techniques for using a universal media bar for controlling different types of media are described.

Magnetostrictive actuator of a medical ultrasound transducer assembly, and a medical ultrasound handpiece and a medical ultrasound system having such actuator

Apparatus includes a magnetostrictive actuator of a medical ultrasound transducer assembly. The actuator comprises a magnetostrictive alloy chosen from a list. A medical ultrasound handpiece includes an ultrasound transducer assembly adapted to attachingly receive an end effector. The transducer assembly includes a magnetostrictive actuator having a magnetostrictive alloy, and includes a first coil surrounding the actuator and adapted to excite the actuator to substantially a desired medical resonant frequency and substantially a desired medical amplitude. A medical ultrasound system includes a handpiece housing, a first medical ultrasound transducer assembly, and a first medical end effector attachable to the first transducer assembly. The first transducer assembly includes a magnetostrictive first actuator having a first magnetostrictive alloy. At least a portion of the first transducer assembly is attachingly insertable in the handpiece housing without the use of tools, without damaging the handpiece housing, and without damaging the first transducer assembly.