A valve mechanism (1) for coupling to a trocar (3) comprises a housing (15) having an instrument bore (16) extending therethrough from an upstream end (17) to a downstream end (18) and alignable with an instrument bore (9) of the trocar (3). A gate valve (20) comprising a pair of gate elements (22) located in the housing (15) is operable between a closed state closing the instrument bore (16) and an open state clear of the instrument bore (16). First compression springs (31) urge the gate elements (22) into the closed state. A pair of engagement members (33), which are engageable with an instrument (10), for example, a laparoscope in the instrument bore (16), and which extend into the instrument bore (16) from respective carrier elements (35) through guide slots (38). The carrier elements (35) are coupled to operating members (27) of the gate elements (22) through link members (47) for operating the gate elements (22) from the closed state to the open state as the engagement members (33) are urged downwardly in the direction of the arrow A in the guide slots (38) by an instrument (10) being entered through the instrument bore (16).

A system and method for passing an end portion of a needle system from a body cavity to an outer environment through a laparoscopic port is provided. The system comprises a seal bridge which comprises an elongated body. The seal bridge is telescopically introducible at a first proximal end, through a first lumen in the port and bypassing a seal mechanism of the laparoscopic port. The seal bridge is adapted to be inserted through the proximal opening port to be deployed in the lumen of the port and thereby bridging across and/or deactivating the seal of the port. The method comprises positioning a distal portion of a needle shaft from within the body cavity into the port lumen and across the seal opened by the seal bridge.

Embodiments of the present disclosure are directed to implantable sealing devices, delivery apparatuses, and methods of their use, for closing surgical openings or defects in a sidewall of a vessel in a subject. In several embodiments, the disclosed implantable sealing devices, delivery apparatuses, and methods can be used to close a surgical opening in a sidewall of the heart.

Disclosed is a trocar comprising a silencer. An end sealing assembly of a sheath of the trocar of the present application comprises an upper cover, a radial sealing assembly, a silencer and a lower cover; the silencer being an elastic body having one end installed on the radial sealing assembly and the other end installed on the lower cover; and the radial sealing assembly installed between the upper cover and the lower cover, Since the silencer holds up the radial sealing assembly, a gap between the upper cover and the radial sealing assembly is reduced, thereby avoiding an impact sound produced when a surgical instrument is withdrawn outwards, When the surgical instrument is advanced inwards, the impact sound produced when the surgical instrument is advanced inwards is avoided due to a buffer effect of the silencer.

Methods and devices are provided for accessing a body cavity. In one embodiment, a surgical access device is provided that includes a housing having at least one access or sealing port for receiving a surgical instrument, and a retractor removably coupled to the housing and having a working channel configured to extend into a body cavity. The housing can include releasably matable upper and lower portions, with the upper portion being configured to freely rotate 360° relative to the lower portion and to the retractor when the housing is mated thereto.

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.

A gas circulation system is disclosed for performing robotically assisted surgical procedures in a surgical cavity of a patient, which includes a multi-lumen tube set including a dual lumen portion having a pressurized gas line and a return gas line, and a single lumen portion having a gas supply and sensing line, a valve sealed access cap for cooperative reception with a first robotic cannula and having an inlet path for communicating with the gas supply and sensing line of the tube set, and a gas sealed access cap for cooperative reception with a second robotic cannula and having an inlet path for communicating with the pressurized gas line of the tube set and an outlet path for communicating with the return gas line of the tube set.

A tissue guard includes a body defining an open proximal end, an open distal end, and a lumen extending through the body between the open proximal end and the open distal end. The tissue guard further includes a lip extending radially outwardly from the open proximal end of the body. The lip includes a plurality of spaced-apart cut-outs defined about the outer circumference of the lip to define a plurality of tabs of the lip. Each tab includes an outer edge segment. The body and the lip are monolithically formed as a single piece of material.

A surgical access port for passage through body tissue to provide access to an underlying tissue site is provided. The access port has a working channel dimensioned for receiving a surgical instrument and a seal assembly for providing a substantial seal before, during and after insertion of a surgical instrument. The seal assembly includes an instrument seal and a zero seal. The instrument seal includes a proximal base that is interconnected to a distal instrument engaging portion by an elongate supporting portion. The engaging portion has a lateral dimension larger than the lateral dimension of the supporting portion forming a bulbous, mushroom-like head. The lateral dimension of the engaging portion decreases toward a distal opening of the instrument seal such that the distal end of the engaging portion is substantially perpendicular to the seal axis. The supporting portion closely conforms to an inserted instrument and serves to align the distal end of the seal.

A trocar seal comprising an elastomeric membrane having an opening adapted to receive a surgical instrument. The membrane is configured with a plurality of pleats circumscribing the opening and extending laterally from opening. The pleats comprise a plurality of pleat walls increasing in height as the pleats extend laterally from the opening. In one embodiment, the pleats are conically arranged.