SURGICAL OPTICAL ACCESS APPARATUS
An optical access apparatus includes a portal sleeve defining a longitudinal axis and a longitudinal opening therethrough and an inner member at least partially positionable within the portal sleeve. The portal sleeve has leading and trailing end portions. The leading end portion has a leading edge adapted to penetrate tissue. The inner member includes a longitudinal lumen for at least partial reception of a viewing device and has a generally closed optical window adapted to permit passage of an image for viewing by the viewing device. The closed optical window is generally atraumatic with respect to the tissue whereby penetration through the tissue is substantially effected through the leading edge of the portal sleeve.
1 . An optical access apparatus, which comprises:
a portal sleeve defining a longitudinal axis and a longitudinal opening therethrough, the portal sleeve having leading and trailing end portions, the leading end portion having a leading edge adapted to penetrate tissue; and
an inner member at least partially positionable within the portal sleeve, the inner member including a longitudinal lumen for at least partial reception of a viewing device and having a generally closed optical window adapted to permit passage of an image for viewing by the viewing device, the closed optical window being generally atraumatic with respect to the tissue whereby penetration through the tissue is substantially effected through the leading edge of the portal sleeve.
2 . The optical access apparatus according to claim 1 wherein the leading edge of the portal sleeve defines a sharp edge adapted to pierce through tissue.
3 . The optical access apparatus according to claim 1 wherein the leading edge of the portal sleeve includes a forwardmost edge surface which is longitudinally spaced a predetermined distance relative to the closed optical window.
4 . The optical access apparatus according to claim 1 wherein the leading edge includes an oblique edge surface, the oblique edge surface extending from the forwardmost edge surface and being obliquely arranged with respect to the longitudinal axis.
5 . The optical access apparatus according to claim 4 wherein the oblique edge surface is generally arcuate.
6 . The optical access apparatus according to claim 5 wherein the oblique edge surfaces defines a general concave arrangement.
7 . The optical access apparatus according to claim 4 wherein the closed optical window defines a leading end obliquely arranged with respect to the longitudinal axis.
8 . The optical access apparatus according to claim 7 wherein the leading end of the optical window defines a general arcuate characteristic.
9 . The optical access apparatus according to claim 8 wherein the leading end of the optical window defines a general concave characteristic.
10 . The optical access apparatus according to claim 1 wherein the inner member includes means to rotationally align the inner member with respect to the portal sleeve.
11 . The optical access apparatus according to claim 1 including a base connected to the inner member and a portal housing connected to the portal sleeve, the base and the portal housing having structure to rotationally fix the inner member relative to the portal sleeve.