| 主权项 |
1. A surgical access assembly for creating an operative pathway through body tissue, comprising:
an outer sheath defined by an open distal end and an open proximal end and including a hollow body portion therebetween, wherein the outer sheath further comprises a tapered portion positioned between the body portion and the open distal end, and further comprising a grip ring positioned at least partially around the open proximal end of the outer sheath, wherein the outer diameter of the grip ring is greater than a greatest diameter of the outer sheath; an obturator defined by a distal end and a proximal end, wherein the distal end further comprises a tapered distal tip member that terminates in a closed distal tip for atraumatically dilating tissue; and an illumination ring having at least one light element supported thereon that is electrically connected to a power source, wherein the illumination ring includes a locking arrangement to selectively mount the illuminating ring on to an outside surface of the grip ring of the outer sheath, and wherein a navigational element is mounted on the illumination ring such that when the illumination ring is mounted to the grip ring attached to the outer sheath, that a navigation system, which is operatively connected to the navigational element, is configured to track the location of the outer sheath so as to indicate the location of the outer sheath with respect to a patient's anatomy; wherein the obturator is assembled to the outer sheath in an introducing configuration such that the tapered distal tip member protrudes from the open distal end of the outer sheath, with a transition between the tapered portion and the tapered distal tip cooperating to form an atraumatic assembly distal end. |
