Trocar and cannula assembly having conical valve and related methods
First Claim
1. A trocar system comprising:
- a cannula having an elongate cannula body including medial and distal portions thereof having at least a first cannula diameter and a proximal portion thereof connected to the medial portion and having a second cannula diameter being greater than the first cannula diameter;
a valve housing detachably connected to the proximal portion of the cannula body, the valve housing comprising;
a proximal end housing portion including an annular valve ring recess and a first opening having a first opening diameter defined by portions of an inner valve housing sidewall extending distally in a substantially axial direction, 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 therebetween and having a proximal valve housing inner perimeter surface and a distal valve housing inner perimeter surface;
a valve fixedly positioned at least partially within the valve housing and including a valve body comprising;
a proximal valve section fixedly positioned entirely within the valve housing and including;
a valve ring positioned in the valve ring recess of the valve housing and having a proximal surface, a distal surface, an inner perimeter surface, and an outer perimeter surface defining an outer perimeter of the valve body, a plurality of convolutes each having a first sidewall extending radially inwardly from a portion of the inner perimeter surface of the valve ring, and a second sidewall extending axially from the first sidewall substantially parallel to the inner perimeter surface of the valve ring and forming an inner radial periphery of the proximal valve section, the inner perimeter surface of the valve ring, the first sidewall, and the second sidewall of each of the plurality of convolutes separately forming a respective convolute recess for each separate one of the plurality of convolutes, and a plurality of rib members each radially extending substantially an entire distance between the inner radial periphery of the proximal valve section and inner perimeter surface of the valve ring and symmetrically positioned spaced-apart from each other;
a distal valve section extending axially from the proximal valve section and at least partially into the proximal portion of the cannula, and including;
a valve extension extending axially from the plurality of convolutes and having a proximal end portion substantially connected to a distal portion of each of the plurality of convolutes, a distal end portion, and a substantially conically shaped medial portion connected to and extending therebetween, and an annular-shaped valve opening positioned in the distal end portion of the 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 the valve opening a seal is maintained between peripheries of the valve extension surrounding the valve opening and outer peripheries of any one of the plurality of elongate tools extending therethrough, the plurality of tools each having an elongate body for extending through the valve housing, the valve opening of the valve, and the cannula; and
a compression ring positioned in the valve housing abuttingly contacting an axially facing distal surface of the valve ring to hold the valve ring in the valve ring recess and to compress the valve ring against an axially facing inner surface of the proximal end housing portion of the valve housing adjacent the valve ring recess in order to fixedly position the valve within the valve housing, the compression ring comprising;
a compression ring opening substantially aligned axially with the first opening of the valve housing to allow extension of the plurality of elongate tools therethrough, an outer perimeter surface having a radial diameter sized so that the compression ring substantially abuttingly contacts the distal valve housing inner perimeter surface when positioned within the valve housing, and an annular flange extending into each one of the plurality of convolute recesses.
10 Assignments
0 Petitions
Accused Products
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.
96 Citations
20 Claims
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1. A trocar system comprising:
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a cannula having an elongate cannula body including medial and distal portions thereof having at least a first cannula diameter and a proximal portion thereof connected to the medial portion and having a second cannula diameter being greater than the first cannula diameter;
a valve housing detachably connected to the proximal portion of the cannula body, the valve housing comprising;
a proximal end housing portion including an annular valve ring recess and a first opening having a first opening diameter defined by portions of an inner valve housing sidewall extending distally in a substantially axial direction, 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 therebetween and having a proximal valve housing inner perimeter surface and a distal valve housing inner perimeter surface;
a valve fixedly positioned at least partially within the valve housing and including a valve body comprising;
a proximal valve section fixedly positioned entirely within the valve housing and including;
a valve ring positioned in the valve ring recess of the valve housing and having a proximal surface, a distal surface, an inner perimeter surface, and an outer perimeter surface defining an outer perimeter of the valve body, a plurality of convolutes each having a first sidewall extending radially inwardly from a portion of the inner perimeter surface of the valve ring, and a second sidewall extending axially from the first sidewall substantially parallel to the inner perimeter surface of the valve ring and forming an inner radial periphery of the proximal valve section, the inner perimeter surface of the valve ring, the first sidewall, and the second sidewall of each of the plurality of convolutes separately forming a respective convolute recess for each separate one of the plurality of convolutes, and a plurality of rib members each radially extending substantially an entire distance between the inner radial periphery of the proximal valve section and inner perimeter surface of the valve ring and symmetrically positioned spaced-apart from each other;
a distal valve section extending axially from the proximal valve section and at least partially into the proximal portion of the cannula, and including;
a valve extension extending axially from the plurality of convolutes and having a proximal end portion substantially connected to a distal portion of each of the plurality of convolutes, a distal end portion, and a substantially conically shaped medial portion connected to and extending therebetween, and an annular-shaped valve opening positioned in the distal end portion of the 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 the valve opening a seal is maintained between peripheries of the valve extension surrounding the valve opening and outer peripheries of any one of the plurality of elongate tools extending therethrough, the plurality of tools each having an elongate body for extending through the valve housing, the valve opening of the valve, and the cannula; and
a compression ring positioned in the valve housing abuttingly contacting an axially facing distal surface of the valve ring to hold the valve ring in the valve ring recess and to compress the valve ring against an axially facing inner surface of the proximal end housing portion of the valve housing adjacent the valve ring recess in order to fixedly position the valve within the valve housing, the compression ring comprising;
a compression ring opening substantially aligned axially with the first opening of the valve housing to allow extension of the plurality of elongate tools therethrough, an outer perimeter surface having a radial diameter sized so that the compression ring substantially abuttingly contacts the distal valve housing inner perimeter surface when positioned within the valve housing, and an annular flange extending into each one of the plurality of convolute recesses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A cap assembly of a cannula comprising:
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a valve housing having at least one opening formed in line with an axis of the valve housing, the at least one opening being defined by an inner valve housing sidewall; and
a valve positioned at least partially within the valve housing and including a valve body having;
a proximal valve section positioned within the 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 the 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 a valve opening positioned in the distal end portion of the 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 the valve opening a seal is maintained between peripheries of the valve extension surrounding the valve opening and outer peripheries of any one of the plurality of elongate tools extending therethrough. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A valve for a cap assembly of a cannula, comprising:
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a first valve section including an annular shaped valve ring;
a second valve section extending from the first 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
a valve opening positioned in the distal end portion of the valve extension and adapted to receive therethrough an elongate tool.
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20. A method of using a trocar system, comprising the steps of:
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providing a cap assembly in a trocar system, the cap assembly comprising a valve positioned at least partially within a valve housing and including a valve body having a proximal valve section positioned within the valve housing and a distal valve section extending axially from the 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 a valve opening positioned in the distal end portion of the valve extension adapted to individually and separately receive therethrough any one of a plurality of different elongate tools;
inserting a tool through cap assembly comprising the valve extension and the valve opening thereof, during which the valve extension guides the distal end of the tool to the valve opening and upon reaching the valve opening the valve opening is deformed temporarily by contact pressure from the tool so that upon the complete insertion of the tool a seal is formed around outer peripheries of the tool;
guiding the tool to the valve extension with a substantially cylindrical-shaped cap assembly opening when the tool is being inserted through the cap assembly;
extending the tool through a cannula body connected to the cap assembly at a proximal portion thereof;
disconnecting the cap assembly from the proximal portion of the cannula body; and
removing tissue or other specimen from the cannula body.
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Specification