Self constricting orifice seal
AssigneeTyco Healthcare Group LP
InventorRichard D. Gresham
Life of this patent
Estimating the term…
Abstract
An apparatus is disclosed for the reception of a surgical instrument inserted through a cannula assembly. An orifice in a seal member defines a central longitudinal axis in general alignment with the cannula assembly. The seal member includes an elastic member for engaging the surgical object about the orifice and forming a fluid-tight interface. A fiber loop is at least partially embedded in the elastic member and serves to compress central portions of the elastic member around the instrument. The fiber loop may form a loop around the orifice and may cooperate with other fiber loops similarly embedded in the seal.
Claims16
A surgical portal apparatus for permitting access to a tissue site, which comprises:
- a portal member dimensioned for positioning within body tissue, the portal member having a passageway providing access to a tissue site and to permit introduction of a surgical object used in performing a surgical procedure adjacent the tissue site;
- and
- a portal seal mounted relative to the portal member and defining a seal axis, the portal seal including an elastic member defining a passage to permit passage of the surgical object generally along the seal axis and being adapted to establish a substantial sealed relation with the surgical object, and at least one fiber loop at least partially embedded within the elastic member, the fiber loop including an inner loop portion at least partially circumscribing the passage and being subject to an outward radial displacement upon insertion of the surgical object into the passage and an outer loop portion subject to an inwardly radial displacement during the outward radial displacement of the inner loop portion.
A surgical portal apparatus for permitting access to a tissue site, which comprises:
- a portal member dimensioned for positioning within body tissue, the portal member having a passageway providing access to a tissue site and to permit introduction of a surgical object used in performing a surgical procedure adjacent the tissue site;
- and
- a portal seal mounted relative to the portal member and defining a seal axis, the portal seal including an elastic member defining an orifice to permit passage of the surgical object generally along the seal axis and a plurality of fiber loops at least partially embedded within the elastic member, the fiber loops arranged about the seal axis and having respective inner loop portions at least partially circumscribing the orifice and outer loop portions relatively displaced from the seal axis, the inner loop portions adapted to be radially displaced upon insertion of the surgical object to cause corresponding radially inward movement of the outer loop portions to draw the elastic member about the surgical object in substantial sealed relation therewith.
Dependencies are inferred from the claim text.