Trocar and cannula assembly having conical valve and related methods

Abstract

A trocar system for endoscopic surgery, cap assembly, and related methods are provided. The cap assembly includes a valve housing with an opening formed in line with an axis of the valve housing. The cap assembly also includes a valve positioned adjacent the opening of the valve housing. The valve includes a valve body with an annular-shaped valve opening for receiving elongate tools with differing diameters so that a seal is maintained between the valve opening and any of the plurality of elongate tools. The valve body includes a proximal valve section including a valve ring and positioned within the valve housing and includes a distal valve section extending axially from the proximal valve section. The distal valve section includes a valve extension having a proximal end portion, a distal end portion, and a substantially conically shaped medial portion connected to and extending therebetween. A valve opening is positioned in the distal end portion of the valve extension that is adapted to individually and separately receive the elongate tools so that when any one of the elongate tools is positioned through the valve opening, a seal is maintained between peripheries of the valve extension surrounding the valve opening and outer peripheries of the inserted elongate tool.