ACCESS ASSEMBLYS FOR SURGICAL INSTRUMENT

An access assembly for a surgical instrument, including: a tube member, a proximal sealing device connecting the surgical instrument to a proximal end of the tube member in a sealed manner, a distal end member connected with the tube member, a fluid supply passage for providing the fluid to the access assembly and a fluid discharge passage for the access assembly to discharge the fluid. The distal end member includes: a tubular housing connected with a distal end of the tube member; and a plurality of sealing valves arranged at a distal end of the tubular housing and configured to open and seal a distal end of the access assembly. At least one sealing valve includes a nozzle for ejecting a fluid, a fluid inlet for receiving the fluid, and a distal end member fluid channel for fluidly communicating the fluid inlet and the nozzle.