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Heart Surgery

Deformable-conduits-and-methods-for-shunting-bodily-fluid-during-surgery

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Deformable conduits and methods for shunting bodily fluid during surgery

Details

Inventors: Fogarty, Thomas J.; Ryan, Timothy J.;
Assignee: Cardiothoracic Systems, Inc. (Cupertino, CA)
Primary Examiner: Milano; Michael J.
Assistant Examiner:
Attorney, Agent or Firm: Limbach & Limbach LLP

The present invention comprises a tubular shunt for insertion into a fluid vessel in a living creature constructed of an elastically deformable material that reduces in circumference when stretched longitudinally so that the ends of the shunt may be easily inserted into openings in a blood vessel and where the material expands circumferentially when allowed to axially contract such that the ends of shunt press against the vessel wall to secure the shunt and form a water tight seal to permit fluid to flow through the tubular conduit of the shunt. A method for shunting fluid-flow in a portion of a vessel in a living creature is also disclosed wherein a shunt of the present invention is stretched longitudinally so that the ends of the shunt contract and then inserted into a lumen of a blood vessel. Following insertion of the shunt, the shunt is allowed to return to its relaxed geometry so that it forms a fluid tight seal with the interior of the lumen.

DETAILED DESCRIPTION It is an object of the present invention to provide methods and devices for temporarily shunting a fluid-carrying vessel or tubular tissue structure in a living creature to provide uninterrupted flow of fluid through the vessel or tissue structure during a surgical procedure.
Another object of the present invention is to provide a shunt apparatus positionable within an incision in a blood vessel such that the shunt provides a substantially bloodless field around the incision site.
Another object of the present invention is to provide a shunt apparatus having a tubular structure constructed of an elastically deformable material that reduces circumferentially when axially lengthened and expands circumferentially toward an original, biased circumference when allowed to axially contract.
Another object of the present invention is that the circumference of the ends of the shunt apparatus will expand when the ends are released such that the ends securely lodge against the inner walls of a vessel into which the shunt is inserted and hold the shunt apparatus in place within the vessel lumen.
Yet another object of the present invention is that the circumference of the ends of the shunt apparatus may be reduced for easy insertion into the openings of an incised vessel.
It is a further object of the present invention that the shunt be secured within the vessel without the use of clamps or inflatable bladders.
It is an additional object of the present invention that the shunt apparatus may be easily repositioned within the vessel without interrupting the flow of fluid through the shunt apparatus.
Accordingly, the present invention provides a shunting device for implantation in a fluid-carrying vessel or tubular tissue structure having an elastically deformable, generally tubular body structure.
The body structure has contiguous segments or regions including first and second end portions and a central region therebetween to collectively define a conduit having a longitudinal axis

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