Abstract: A single or multi-port vascular access device including one or more reservoirs each covered by a needle-penetrable, self-sealing septum. The one or more reservoirs each open to an outlet in a stem to which the catheter is attached. The reservoir may be generally circular or ellipsoid in shape and large enough so that fluid movement into and out of the needle is unimpeded. In order to maximize flow between the reservoir and catheter and to minimize any regions of impeded or low fluid flow where coagulation or cell shearing may occur, the fluid passage leading from the reservoir through the outlet into the catheter is defined by unique tapered and tangential geometries. For example, the outlet surface may be globally tangent along the entire reservoir surface, or may be globally tangent along only one side of the reservoir surface.
Type:
Grant
Filed:
June 9, 2008
Date of Patent:
December 20, 2011
Assignee:
R4 Vascular, Inc.
Inventors:
Nicholas R. Powley, Graig Leonard Kveen, Donald Geer, Steven Allex, John Arthur Zawacki
Abstract: The present invention provides a compliant balloon for use with a catheter having an inner compliant inner layer defining a cylindrical lumen encased by a fiber layer including non-braided inelastic fibers imparting integrity to the balloon wall. The balloon further includes radiopaque material which may be disposed over substantially the entire length of the balloon as a coating or by incorporation within the fiber layer or an outer coating layer. The balloon is expandable from a folded deflated state to an inflated state by increasing pressure within the balloon and can be used with saline as the sole inflation medium to allow rapid deflation as compared to use of a balloon with a contrast medium.
Type:
Application
Filed:
October 30, 2009
Publication date:
September 16, 2010
Applicant:
R4 VASCULAR, INC.
Inventors:
Steven J. Allex, Donald Geer, Brett Allyn Williams, Brady Jon Hatcher, Tristan Lynn Tieso
Abstract: A single or multi-port vascular access device including one or more reservoirs each covered by a needle-penetrable, self-sealing septum. The one or more reservoirs each open to an outlet in a stem to which the catheter is attached. The reservoir may be generally circular or ellipsoid in shape and large enough so that fluid movement into and out of the needle is unimpeded. In order to maximize flow between the reservoir and catheter and to minimize any regions of impeded or low fluid flow where coagulation or cell shearing may occur, the fluid passage leading from the reservoir through the outlet into the catheter is defined by unique tapered and tangential geometries. For example, the outlet surface may be globally tangent along the entire reservoir surface, or may be globally tangent along only one side of the reservoir surface.
Type:
Application
Filed:
June 9, 2008
Publication date:
April 16, 2009
Applicant:
R4 Vascular, Inc.
Inventors:
Nicholas R. Powley, Graig Leonard Kveen, Donald Geer, Steven Allex, John Arthur Zawacki