Optical trocar
First Claim
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1. A trocar which comprises:
- a cannula;
an obturator configured for insertion into said cannula, said obturator having a proximal end, a distal end and a longitudinal bore;
an image passing member positioned on said distal end of said obturator for allowing optical images to pass into said longitudinal bore; and
means for penetrating body tissue positioned at said distal end of said obturator, said penetrating means being movable in relation to said image passing member between a non-deployed position and a deployed position.
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Abstract
The present invention relates to an optical obturator which includes a sleeve having a longitudinal bore between a proximal end and a distal end. The longitudinal bore of the sleeve is configured to receive at least a portion of an endoscope or like image transferring system. An image passing member, such as an optical window is positioned at the distal end of the sleeve and is provided to permit optical images to pass into the longitudinal bore of the sleeve and to permit illumination light to pass to the surgical site. An automatically retracting blade is positioned distal to the image passing member to facilitate penetration of body tissue.
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Citations
19 Claims
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1. A trocar which comprises:
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a cannula;
an obturator configured for insertion into said cannula, said obturator having a proximal end, a distal end and a longitudinal bore;
an image passing member positioned on said distal end of said obturator for allowing optical images to pass into said longitudinal bore; and
means for penetrating body tissue positioned at said distal end of said obturator, said penetrating means being movable in relation to said image passing member between a non-deployed position and a deployed position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Apparatus for observation of body tissue during penetration which comprises:
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a cannula assembly having a cannula housing and a cannula sleeve extending from said cannula housing, said cannula sleeve having a longitudinal bore extending from a proximal end to a distal end;
an obturator assembly having an obturator housing and an obturator sleeve, said obturator sleeve being configured for coaxial alignment with said cannula sleeve, a distal end of said obturator sleeve having an image passing member positioned thereon, the image passing member having a recess, and the obturator assembly further having means for penetrating body tissue positioned at least partially within the recess of said image passing member. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
a blade drive member slidably positioned within said obturator housing and operatively connected to said blade such that said blade is movable between deployed and non-deployed positions; and
a trigger member pivotally connected to said obturator housing and having an automatic release member operatively associated with said trigger member and said blade drive member such that when said blade is moved to said deployed position said automatic release member actuates to facilitate movement of said blade to said non-deployed position.
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17. The apparatus according to claim 16, wherein said automatic release member comprises a lever pivotally connected to said trigger member and a bushing connected to said blade drive member such that said lever engages said bushing to deploy said blade in response to pivotal movement of said trigger member and such that said lever disengages from said bushing when said trigger member is actuated to a predetermined position so as to facilitate movement of said blade to said non-deployed position.
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18. The apparatus according to claim 10, wherein said image passing member is configured to allow passage of illumination light to the body tissue.
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19. The apparatus according to claim 10, wherein said obturator sleeve has means to receive an optical imaging member for transmitting images to a proximal end of said obturator housing for viewing.
Specification