| 主权项 |
1. A trocar assembly comprising:
a housing having a proximal end, at least one side wall depending from the proximal end, the proximal end and at least one side wall together defining a housing interior, and an opening adjacent or in the proximal end, the opening disposed to allow entry of an elongated instrument into the interior of the housing; a septum seal having an outer projection attached to the housing, an outer seal wall depending from the outer projection, an inner seal wall connected to the outer seal wall and positioned inwardly with respect to the outer seal wall to define a space between the outer seal wall and the inner seal wall, and a sealing member extending inwardly from the inner seal wall, the sealing member having an aperture therein substantially aligned with the housing opening for receiving an elongated instrument therethrough, the inner seal wall and the sealing member together defining an interior seal space; and a shield for the protection of the septum seal from being perforated by a surgical instrument, the shield residing at least partially within the interior seal space and being expandable to allow different sized instruments to pass therethrough. |
