Abstract: Access assemblies include an instrument valve housing and a valve assembly disposed within the cavity of the instrument valve housing. The valve assembly includes a guard assembly, a seal assembly disposed adjacent to the guard assembly, and a centering mechanism for maintaining the seal assembly and guard assembly centered within a cavity of the instrument valve. The guard assembly includes a support ring and a plurality of guard sections disposed distally of the support ring. The seal assembly includes a proximal seal member, an intermediate seal assembly, and a distal seal member, the intermediate seal assembly including a plurality of seal sections in a stacked configuration.

Abstract: A specimen retrieval device for endoscopic procedures includes a sleeve, barbed sutures, guide members, and a contractible band that is supported about an open distal end of the sleeve. Each of the barbed sutures have an elongate body, a distal portion, a proximal portion, and barbs that extend proximally from the elongate body. The guide members are secured to an inner surface of the sleeve and slidably receive respective barbed sutures. A tissue specimen to be removed from a patient is placed within a cavity defined by the sleeve and within the confines of the barbed sutures. Proximal portions of the barbed threads can be independently or simultaneously pulled in a proximal direction to withdraw the tissue specimen and the sleeve from the body cavity.

Abstract: An access assembly includes an instrument valve housing defining a cavity, and a valve assembly. The valve assembly includes a flange seal member, a seal assembly, a centering mechanism, and a retainer frame assembly. The flange seal member includes an arcuate portion configured to adjustably engage first and second surfaces of the instrument valve housing in a sealing relation. The centering mechanism is configured to bias the valve assembly towards a generally centered position within the cavity. The centering mechanism includes a plurality of coils including inner coil portions operatively secured with the seal assembly, and outer coil portions configured to engage the first surface of the instrument valve housing. The retainer frame assembly includes first and second members. The inner coil portion of the centering mechanism is disposed between seal assembly and the second member of the retainer frame assembly.

Abstract: A surgical stapling device includes a replaceable staple cartridge that includes a knife sharpener for sharpening a cutting blade of the stapling device prior to each firing of the stapling device. In aspects of the disclosure, the staple cartridge includes wipers positioned distally of the knife sharpener to remove particulate material from the cutting blade before the cutting blade engages tissue.

Abstract: An access assembly includes an instrument valve housing and a valve assembly disposed within the instrument valve housing. The instrument valve housing includes upper and lower housing sections. The valve assembly includes a centering mechanism, a seal assembly, and a guard assembly. The centering mechanism is configured to bias the valve assembly towards a generally centered position within the instrument valve housing. The centering mechanism includes a base seal member having an annular base and a flange portion. The flange portion includes an arcuate portion configured to adjustably engage first and second surfaces of the instrument valve housing in a sealing relation. The seal assembly is attachable to the centering mechanism. The seal assembly is configured to engage a surgical instrument inserted into the access assembly in a sealing relation. The guard assembly is attachable to the centering mechanism.

Abstract: A surgical access assembly includes a cannula, a valve housing attached to the cannula, and a valve assembly positioned in the valve housing. The valve assembly includes a centering mechanism with a hoop and fingers, a ring with a flange at one end of the ring, a retainer having first and second discs, a guard having a frame and flaps attached to the frame, and a seal with petals attached to a support. The guard is at least partially disposed in the first disc and the seal is at least partially disposed in the second disc.

Abstract: An access assembly includes an instrument valve housing defining a cavity, and a valve assembly. The valve assembly includes a flange seal member, a seal assembly, a centering mechanism, and a retainer frame assembly. The flange seal member includes an arcuate portion configured to adjustably engage first and second surfaces of the instrument valve housing in a sealing relation. The centering mechanism is configured to bias the valve assembly towards a generally centered position within the cavity. The centering mechanism includes a plurality of coils including inner coil portions operatively secured with the seal assembly, and outer coil portions configured to engage the first surface of the instrument valve housing. The retainer frame assembly includes first and second members. The inner coil portion of the centering mechanism is disposed between seal assembly and the second member of the retainer frame assembly.

Abstract: Surgical access assemblies include an instrument valve housing and a valve assembly disposed within the cavity of the instrument valve housing. The valve assembly includes a guard assembly, a seal assembly disposed adjacent to the guard assembly, and a centering mechanism for maintaining the seal assembly and guard assembly centered within a cavity of the instrument valve. The seal assembly includes a multi-petal seal member and upper and lower support members. The upper and lower support members sandwich the multi-petal seal member therebetween to reduce and/or eliminate leaks through the multi-petal seal member.

Abstract: Access assemblies include an instrument valve housing and a valve assembly disposed within a cavity of the instrument valve housing. The valve assembly includes a guard assembly, and a seal assembly disposed adjacent to the guard assembly. The seal assembly includes first, second, third, and fourth seal sections. The first seal section is nested within the second seal section, the first and second seal sections are nested within the third seal section, and the first, second, and third seal sections are nested within the fourth seal section.

Abstract: An access assembly includes an instrument valve housing and a valve assembly disposed within the instrument valve housing. The instrument valve housing includes upper and lower housing sections. The valve assembly includes a centering mechanism, a seal assembly, and a guard assembly. The centering mechanism is configured to bias the valve assembly towards a generally centered position within the instrument valve housing. The centering mechanism includes a base seal member having an annular base and a flange portion. The flange portion includes an arcuate portion configured to adjustably engage first and second surfaces of the instrument valve housing in a sealing relation. The seal assembly is attachable to the centering mechanism. The seal assembly is configured to engage a surgical instrument inserted into the access assembly in a sealing relation. The guard assembly is attachable to the centering mechanism.

Abstract: Access assemblies includes an instrument valve housing and a valve assembly disposed within the cavity of the instrument valve housing. The valve assembly includes a guard assembly, and a seal assembly disposed distal of the guard assembly. In embodiments, the seal assembly includes a plurality of seal segments in an overlapping configuration. Each seal segment of the plurality of seal segments includes a seal portion having a smooth surface and a ribbed surface. The ribbed surfaces include a central spline extending in a radial direction and plurality of concentric ribs extending outwardly from the central spline.

Abstract: A surgical access assembly includes a cannula, a valve housing attached to the cannula, and a valve assembly positioned in the valve housing. The valve assembly includes a centering mechanism with a hoop and fingers, a ring with a flange at one end of the ring, a retainer having first and second discs, a guard having a frame and flaps attached to the frame, and a seal with petals attached to a support. The guard is at least partially disposed in the first disc and the seal is at least partially disposed in the second disc.

Abstract: An endoscopic surgical instrument includes an elongated shaft and a pair of elongated arms extending through the shaft. The arms have a distal end portion configured to grasp tissue therebetween. The distal end portion of at least one of the arms is equipped with a sensor for sensing a property of the tissue.

Abstract: Access assemblies include an instrument valve housing and a valve assembly. The valve assembly includes a guard assembly, a seal assembly disposed adjacent to the guard assembly, and a gimbal mount assembly supporting the guard assembly and the seal assembly. The gimbal mount assembly is configured to permit angulation of the valve assembly relative to the instrument valve housing.

Abstract: Access assemblies includes an instrument valve housing and a valve assembly disposed within the cavity of the instrument valve housing. The valve assembly includes a guard assembly, and a seal assembly disposed distal of the guard assembly. In embodiments, the seal assembly includes a plurality of seal segments in an overlapping configuration. Each seal segment of the plurality of seal segments includes a seal portion having a smooth surface and a ribbed surface. The ribbed surfaces include a plurality of ribs extending in a radial direction.

Abstract: Access assemblies include an instrument valve housing and a valve assembly disposed within the cavity of the instrument valve housing. The valve assembly includes a guard assembly, a seal assembly disposed adjacent to the guard assembly, and a centering mechanism for maintaining the seal assembly and guard assembly centered within a cavity of the instrument valve. The guard assembly includes a support ring and a plurality of guard sections disposed distally of the support ring.

Abstract: Access assemblies include an instrument valve housing and a valve assembly disposed within the cavity of the instrument valve housing. The valve assembly includes a guard assembly, a seal assembly disposed adjacent to the guard assembly, and a centering mechanism for maintaining the seal assembly and guard assembly centered within a cavity of the instrument valve. The guard assembly includes a support ring and a plurality of guard sections disposed distally of the support ring. The seal assembly includes a proximal seal member, an intermediate seal assembly, and a distal seal member, the intermediate seal assembly including a plurality of seal sections in a stacked configuration.

Abstract: An access assembly includes an instrument valve housing and a valve assembly disposed within the instrument valve housing. The instrument valve housing includes upper and lower housing sections. The valve assembly includes a centering mechanism, a seal assembly, and a guard assembly. The centering mechanism is configured to bias the valve assembly towards a generally centered position within the instrument valve housing. The centering mechanism includes a base seal member having an annular base and a flange portion. The flange portion includes an arcuate portion configured to adjustably engage first and second surfaces of the instrument valve housing in a sealing relation. The seal assembly is attachable to the centering mechanism. The seal assembly is configured to engage a surgical instrument inserted into the access assembly in a sealing relation. The guard assembly is attachable to the centering mechanism.

Abstract: An access assembly includes an instrument valve housing defining a cavity, and a valve assembly. The valve assembly includes a flange seal member, a seal assembly, a centering mechanism, and a retainer frame assembly. The flange seal member includes an arcuate portion configured to adjustably engage first and second surfaces of the instrument valve housing in a sealing relation. The centering mechanism is configured to bias the valve assembly towards a generally centered position within the cavity. The centering mechanism includes a plurality of coils including inner coil portions operatively secured with the seal assembly, and outer coil portions configured to engage the first surface of the instrument valve housing. The retainer frame assembly includes first and second members. The inner coil portion of the centering mechanism is disposed between seal assembly and the second member of the retainer frame assembly.

Abstract: Access assemblies includes an instrument valve housing and a valve assembly disposed within the cavity of the instrument valve housing. The valve assembly includes a guard assembly, and a seal assembly disposed distal of the guard assembly. In embodiments, the seal assembly includes a plurality of seal segments in an overlapping configuration. Each seal segment of the plurality of seal segments includes a seal portion having a smooth surface and a ribbed surface. The ribbed surfaces include a central spline extending in a radial direction and plurality of concentric ribs extending outwardly from the central spline.