Patent ID: 7377897
Filing Date: 2008-05-27
Classification: A61B

Abstract:
1. A portal device for maintaining an opening in a patient, comprising: a first elongated hollow structure having a first end and a second end, the first elongated hollow structure having a plurality of cam follower surfaces adjacent the first end, the cam follower surfaces being moveable between a first position and a second position, the cam follower surfaces forming a first interior opening dimension of the first elongated hollow structure when the cam follower surfaces are in the first position and a second and greater interior opening dimension when the cam follower surfaces are in the second position; and a second elongated hollow structure having a first end and a second end, the second elongated hollow structure being moveable within the first elongated hollow structure, the second elongated hollow structure having a plurality of cam surfaces adjacent the first end, the cam surfaces forming a first exterior dimension of the second elongated hollow structure, the first exterior dimension being greater than the first interior opening dimension of the first elongated hollow structure.