Trocar valve assembly
First Claim
1. A trocar having a working channel extending along an axis between a distal end and proximal end, the trocar comprising:
- a cannula having a tubular configuration and a wall which defines the working channel at the distal end of the trocar;
a housing disposed in fixed relationship to the cannula and defining the working channel at the proximal end of the trocar;
a valve disposed in the working channel and separating the channel into regions proximal of the valve and regions distal of the valve;
elastomeric means included in the valve and forming a first seal which is openably closable across the working channel;
a wall included in the valve and extending radially outwardly of the elastomeric means;
portions of the housing engaging the valve wall and forming with the valve wall a second seal which is disposed generally outwardly of the first seal;
means for defining a passage extending from regions exterior of the trocar, through the regions proximal of the valve, and into the regions distal of the valve;
a housing inlet included in the passage defining means, the housing inlet defining a first section of the passage which extends through the housing to provide fluid communication between the regions exterior of the trocar and the regions proximal of the valve; and
valve means disposed across the housing inlet for openably closing the first section of the passage to thereby control the administration of a fluid from the regions exterior of the trocar, through the passage and into the working channel of the cannula.
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Accused Products
Abstract
A trocar having a working channel extending along an between a distal end and a proximal end includes a cannula at the distal end and a housing at the proximal end which define a working channel of the trocar. A valve disposed in the working channel separates the trocar into regions proximal of the valve and regions distal of the valve. The valve includes elastomeric means which form a first seal that is openably closable across the working channel. A wall of the valve extends radially outwardly of the elastomeric means and forms a second seal with the housing. The trocar also includes means for defining a passage extending from regions exterior of the trocar through the regions proximal of the valve and into the regions distal of the valve. Valve means disposed across this passage controls the administration of fluid through the passage and into the working channel of the cannula.
379 Citations
14 Claims
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1. A trocar having a working channel extending along an axis between a distal end and proximal end, the trocar comprising:
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a cannula having a tubular configuration and a wall which defines the working channel at the distal end of the trocar; a housing disposed in fixed relationship to the cannula and defining the working channel at the proximal end of the trocar; a valve disposed in the working channel and separating the channel into regions proximal of the valve and regions distal of the valve; elastomeric means included in the valve and forming a first seal which is openably closable across the working channel; a wall included in the valve and extending radially outwardly of the elastomeric means; portions of the housing engaging the valve wall and forming with the valve wall a second seal which is disposed generally outwardly of the first seal; means for defining a passage extending from regions exterior of the trocar, through the regions proximal of the valve, and into the regions distal of the valve; a housing inlet included in the passage defining means, the housing inlet defining a first section of the passage which extends through the housing to provide fluid communication between the regions exterior of the trocar and the regions proximal of the valve; and valve means disposed across the housing inlet for openably closing the first section of the passage to thereby control the administration of a fluid from the regions exterior of the trocar, through the passage and into the working channel of the cannula. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A trocar having a working channel extending along an axis between a proximal end and a distal end, comprising:
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a cannula having a first axis and a tubular configuration with a wall which extends distally from a proximal end of the cannula to define the working channel at the distal end of the trocar; a housing having a second axis and a wall which extends proximally from a distal end of the housing to at least partially define the working channel at the proximal end of the trocar; at least one seal disposed in the housing across the working channel and proximally of the distal end of the housing; one of the cannula and the housing being formed of a sterilizable metal material; the other of the cannula and the housing being formed of a disposable plastic material; and means disposed at the proximal end of the cannula and the distal end of the housing for releasably joining the cannula to the housing with the first axis aligned with the second axis to define the working channel of the trocar. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification