초록 ▼

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 and also includes a valve positioned adjacent the opening of the valve housing. The valve body includes a

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 and also includes a valve positioned adjacent the opening of the valve housing. The valve body includes a proximal valve section including a valve ring positioned within the valve housing, and a distal valve section extending axially from the proximal valve section. The distal valve section includes a valve extension having a proximal and distal end portions, and a substantially conically shaped medial portion connected to and extending therebetween, wherein a plurality of friction-reduction features, preferably tear-drop shaped knobs, are disposed proximate the distal end portion and extending a distance in the medial portion of the valve. A valve opening is positioned in the distal end portion of the valve extension, adapted to individually and separately receive the elongate tools so that when any one of the elongate tools of varying diameter is positioned therethrough, electrostatic adhesion between the valve and the tool is minimized and a seal is maintained between peripheries of the valve extension surrounding the valve opening and outer peripheries of the inserted elongate tool.

대표청구항 ▼

We claim: 1. A cap assembly of a cannula comprising: a valve housing having at least one opening formed in line with an axis of said valve housing, said at least one opening being defined by an inner valve housing sidewall; and a first valve positioned at least partially within said valve housing a

We claim: 1. A cap assembly of a cannula comprising: a valve housing having at least one opening formed in line with an axis of said valve housing, said at least one opening being defined by an inner valve housing sidewall; and a first valve positioned at least partially within said valve housing and including a valve body having: a proximal valve section positioned within said valve housing and including an annular shaped valve ring having a proximal surface, a distal surface, an inner perimeter surface, and an outer perimeter surface, a distal valve section extending axially from said proximal valve section and including a valve extension having a proximal end portion, a distal end portion, and a substantially conically shaped medial portion connected to and extending therebetween, and having a plurality of friction-reduction features disposed proximate said distal end portion and extending a distance in said substantially conically shaped medial portion; and a valve opening positioned in said distal end portion of said valve extension and adapted to individually and separately receive therethrough any one of a plurality of different elongate tools each having a different diameter so that when any one of the plurality of elongate tools is positioned through said valve opening a seal is maintained between peripheries of said valve extension surrounding said valve opening and outer peripheries of any one of plurality of elongate tools extending therethrough, wherein said proximal valve section, said distal valve section, and said valve opening comprise said valve body, and wherein said valve body is a singularly formed member. 2. A cap assembly as defined in claim 1, wherein said plurality of friction-reduction features disposed proximate said distal end portion and extending a distance in said substantially conically shaped medial portion of said valve extension comprise a plurality of protrusions extending from a first outer surface of said valve extension and a plurality of protrusions extending from a second, opposing inner surface of said valve extension. 3. A cap assembly as defined in claim 2, wherein said plurality of protrusions comprise tear-drop shaped knobs. 4. A cap assembly as defined in claim 1, wherein said plurality of friction-reduction features disposed proximate said distal end portion and extending a distance in said substantially conically shaped medial portion of said valve extension comprise a plurality of protrusions extending from a first outer surface of said valve extension and a plurality of protrusions extending from a second, opposing inner surface of said valve extension, said plurality of protrusions defining a plurality of annular-shaped rows circumferentially surrounding said annular-shaped valve opening. 5. A cap assembly as defined in claim 4, wherein said plurality of protrusions of each said annular-shaped row of said plurality of annular-shaped rows is offset relative to each said adjacent annular-shaped row. 6. A cap assembly as defined in claim 2, wherein said plurality of protrusions define a pinwheel-shaped surface pattern, and wherein a center of said pinwheel-shaped surface pattern is said annual-shaped valve opening. 7. A cap assembly as defined in claim 1, wherein said inner valve housing sidewall extends distally in a substantially axial direction, and wherein said valve housing further comprises: a proximal end housing portion including a first opening having a first opening diameter defined by portions of said inner valve housing sidewall extending distally in said substantially axial direction, and an annular valve ring recess surrounding said inner valve housing sidewall and said first opening positioned to receive said annular shaped valve ring; a distal end housing portion including a second opening having a second opening diameter defined by a distal valve housing sidewall extending in a substantially axial direction; and a medial housing portion connected to and extending between said proximal end housing portion and said distal end housing portion and having a proximal valve housing inner perimeter surface and a distal valve housing inner perimeter surface. 8. A cap assembly as defined in claim 1, wherein said ring housing has a valve ring recess, wherein said valve ring is positioned in the valve ring recess, and wherein said cap assembly further comprises a compression ring positioned in said valve housing abuttingly contacting an axially facing distal surface of said valve ring to hold said valve ring in said valve ring recess and to compress said valve ring against an axially facing inner surface of said proximal end housing portion of said valve housing adjacent said valve ring recess in order to fixedly position said valve at least partially within said valve housing. 9. A cap assembly as defined in claim 1, wherein said valve housing includes a valve housing inner perimeter surface, wherein said proximal valve section of said valve body further includes a plurality of convolutes each having a convolute recess, and wherein said cap assembly includes compression ring including: a compression ring opening substantially aligned axially with said at least one opening of said valve housing to allow extension of said plurality of elongate tools therethrough; an outer perimeter surface having a radial diameter sized so that said compression ring substantially abuttingly contacts said valve housing inner perimeter surface and said distal surface of said valve ring when positioned within said valve housing; and a flange extending into at least one of said plurality of convolute recesses to rigidly hold said valve ring within said valve housing. 10. A cap assembly as defined in claim 1, wherein said proximal valve section of said valve body further includes: a plurality of convolutes each having a first sidewall extending radially inwardly from a portion of said inner perimeter surface of said valve ring, and a second sidewall extending axially from said first sidewall substantially parallel to said inner perimeter surface of said valve ring and forming an inner radial periphery of the proximal valve section, said inner perimeter surface of said valve ring, said first sidewall, and said second sidewall of each of said plurality of convolutes forming a respective convolute recess for each of said plurality of convolutes; and a plurality of rib members each radially extending substantially an entire distance between said inner radial periphery of said proximal valve section and inner perimeter surface of said valve ring and symmetrically positioned spaced-apart from each other. 11. A cap assembly as defined in claim 10, wherein said plurality of convolutes are each positioned between and connected to two adjacent rib members; wherein said cap assembly further comprises a compression ring positioned in said valve housing abuttingly contacting an axially facing distal surface of said valve ring to hold said valve ring in said valve housing, said compression ring including a compression ring opening substantially aligned axially with said at least one opening of said valve housing to allow extension of the plurality of elongate tools therethrough, and at least one flange extending into at least one of the plurality of convolute recesses; wherein said at least one flange extending into at least one of said plurality of convolute recesses includes a plurality of notches positioned spaced-apart from each other to align with said plurality of rib members of said proximal valve section of said valve body to thereby rotationally align said compression ring with said valve ring when positioned in contact therewith; and wherein each of said plurality of notches receives a separate one of said plurality of rib members to prevent rotational movement of said proximal valve section. 12. A cap assembly as defined in claim 1, wherein said valve positioned at least partially within said valve housing is a first valve, wherein said at least one opening of said valve housing includes a first opening having a first opening diameter defined by portions of an inner valve housing sidewall extending distally in a substantially axial direction and a second opening having a second opening diameter defined by a distal valve housing sidewall extending in a substantially axial direction having a distal valve inner housing perimeter surface, and wherein said cap assembly further includes a second valve positioned adjacent said second opening of said valve housing, said second valve comprising: an annular flange portion spaced axially from said valve ring of said first valve and having a radial diameter sized so that said annular flange portion substantially abuttingly contacts said distal valve inner housing perimeter surface to enhance positioning of said second valve at least partially within the valve housing; a second valve opening positioned within said annular flange portion and substantially aligned axially with a first opening of valve housing to allow extension of the plurality of elongate tools therethrough; an annular-shaped sidewall connected to said annular flange and extending distally in a substantially axial direction when positioned in said valve housing; and a pair of valve flaps connected to and extending inwardly from said annular-shaped sidewall and having at least one slit along common peripheral edges thereof through which the plurality of tools extend individually and separately. 13. A cap assembly as defined in claim 12, further comprising a cap seal ring positioned at least partially within said valve housing and abuttingly contacting a distal surface of said annular flange portion of said second valve, said cap seal ring also including at least one radially extending flange adapted to engage outer peripheries of a proximal portion of a cannula to detachably connect said valve housing to the cannula. 14. A cap assembly as defined in claim 2, wherein each said protrusion of said plurality of protrusions is of a shape selected from the group consisting of: tear-drop, circular, spherical, and annular rib shapes.