Multiport trocar
First Claim
1. An access device adapted to extend across a body wall into a body conduit or cavity and to form a seal around an instrument inserted through the device into the body conduit or cavity, the device comprising:
- a cannula forming an elongate passage extending from a proximal end to a distal end of the cannula;
a valve housing disposed at the proximal end of the cannula;
a first valve set disposed relative to the housing and forming with the passage of the cannula a first working channel;
a first septum valve included in the first valve set and disposed along the first working channel;
a first zero closure valve included in the first valve set and disposed along the first working channel axially of the first septum valve;
a second valve set disposed relative to the housing and forming with the passage of the cannula a second working channel;
a second septum valve included in the second valve set and disposed along the second working channel;
a second zero closure valve included in the second valve set and disposed along the second working channel axially of the second septum valve; and
means for flexibly supporting at least one of the first septum valve and the second septum valve relative to the housing in a floating relationship with the cannula.
3 Assignments
0 Petitions
Accused Products
Abstract
A trocar adapted to extend across the body wall into a body cavity, and to form a seal around an instrument inserted through the trocar comprises a cannula having a first axis extending between a proximal end and a distal end. A valve housing attached to the proximal end of the cannula forms a working channel with the cannula and includes a rigid housing portion and a flexible housing portion. First and second septum valves are formed in an end wall of the flexible housing portion and form separate valve sets with associated zero closure valves disposed within the valve housing. The valve sets are sized and configured to accommodate different ranges of instrument diameters. The first and second septum valves are offset from the axis of the cannula in their natural positions but are movable to positions more aligned with the axis of the cannula, due to elastomeric characteristics of the flexible housing portions. With multiple valve sets, the trocar can accommodate the simultaneous insertion of two instruments, as well as a full range of instrument diameters.
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Citations
25 Claims
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1. An access device adapted to extend across a body wall into a body conduit or cavity and to form a seal around an instrument inserted through the device into the body conduit or cavity, the device comprising:
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a cannula forming an elongate passage extending from a proximal end to a distal end of the cannula; a valve housing disposed at the proximal end of the cannula; a first valve set disposed relative to the housing and forming with the passage of the cannula a first working channel; a first septum valve included in the first valve set and disposed along the first working channel; a first zero closure valve included in the first valve set and disposed along the first working channel axially of the first septum valve; a second valve set disposed relative to the housing and forming with the passage of the cannula a second working channel; a second septum valve included in the second valve set and disposed along the second working channel; a second zero closure valve included in the second valve set and disposed along the second working channel axially of the second septum valve; and means for flexibly supporting at least one of the first septum valve and the second septum valve relative to the housing in a floating relationship with the cannula. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A trocar assembly including:
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a cannula having an axis extending between a proximal end and a distal end of the cannula; a rigid housing portion having a distal end and a proximal end, the distal end of the rigid housing portion having a fixed relationship with the cannula; an elastomeric housing portion coupled to the proximal end of the rigid housing portion, the elastomeric housing portion being axially compressible; the rigid housing portion and the elastomeric housing portion forming a valve housing and defining with the cannula a working channel of the trocar; an obturator sized and configured for removable insertion through the working channel; a shaft included in the obturator and having an axis extending from a proximal end to a sharp distal tip, the shaft being sized and configured for removable insertion into the cannula to an operative position wherein the distal tip of the shaft extends beyond the distal end of the cannula; a handle of the obturator attached in a fixed relationship to the proximal end of the shaft; and means carried by the shaft of the obturator between the proximal end of the shaft and the distal end of the shaft for engaging at least one of the cannula and the rigid housing portion in order to prevent insertion of the obturator into the cannula beyond the operative position of the obturator. - View Dependent Claims (8, 9, 10, 11)
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12. A trocar assembly, including:
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a cannula having a first axis extending between a proximal end and a distal end; a valve housing fixed to the cannula at the proximal end of the cannula and forming with the cannula a working channel; a valve wall included in the valve housing and having first portions disposed generally transverse to the axis of the cannula, the valve wall having elastomeric properties permitting lateral movement of the first portions of the valve wall relative to the axis of the cannula; a first septum valve included in the first portions of the valve wall and having portions defining an opening through the first septum valve, the opening being formed around a second axis; a second septum valve included in the first portions of the valve wall and having portions defining a second opening through the second septum valve, the second opening being formed around a third axis; and at least one of the second axis of the first septum valve and the third axis of the second septum valve being offset from the first axis of the cannula. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A trocar adapted to extend across a body wall into a body cavity, and to form a seal around an instrument inserted through the trocar into the body cavity, the trocar comprising:
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a cannula having a first axis extending between a proximal end and a distal end; a valve housing disposed proximally of the cannula in a fixed relationship with the cannula, the valve housing forming with the cannula a working channel of the trocar; a septum valve disposed along the working channel of the trocar and forming an opening having a second axis, the septum valve being formed of an elastomeric material stretchable between a first natural position wherein the opening of the septum valve is disposed with the second axis offset from the first axis and of the cannula and a second stretched position wherein the second axis of the septum valve is generally aligned with the first axis of the cannula; and means for supporting the septum valve relative to the cannula to prevent movement of the septum valve from the first natural position to the second stretched position without substantial deformation of the opening of the septum valve. - View Dependent Claims (25)
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Specification