Back to results
US 5,857,464 AGranted
Catheter for media injection
OwnerJawahar M. Desaiinventor
Life of this patent
Estimating the term…
Abstract
An improved endocardial catheter includes a plurality of longitudinally extending openings adjacent intermediate portions at its distal end. The catheter is actuable from a retracted or collapsed mode, wherein the sealed openings are arranged around the tubular catheter surface, to an expanded mode. The plurality of longitudinal openings in the catheter wall enable radial expansion of the tubular surface at the distal end so that intermediate portions of the tubular catheter surface are moved to an operative position radially outward from their position in the retracted mode. In the expanded position, the intermediate portions form wings around the distal end, revealing a cavity within the tubular catheter for the release of contrast material or other fluid into endocardial sites through the longitudinal openings.
Claims15
A catheter comprising;
- an elongated tubular member having a proximal end and a distal end;
- said tubular member including a passageway extending throughout the length of the tube and forming a wall with proximal and distal openings;
- a plurality of circumferentially-spaced longitudinally extending slits through said wall adjacent the distal end defining a plurality of circumferentially-spaced longitudinallly extending flexible intermediate portions of said wall, said flexible intermediate portions capable of forming a plurality of wings extending from said tube to provide for the discharge of fluid from the passageway out through said wall through the open slits defined between said wings;
- a valve at the distal opening of the tubular member;
- and
- further including a valve means for at least partially closing said passageway at the distal end of said tube, said valve means comprising a plurality of resilient flaps which flex when acted on by the force of fluid pressure originating within said passageway.
3 more elements
A catheter comprising;
- an elongated tubular member having a proximal end and a distal end;
- said tubular member including a passageway extending throughout the length of the tube and forming a wall with proximal and distal openings;
- a plurality of circumferentially-spaced longitudinally extending slits through said wall adjacent the distal end defining a plurality of circumferentially-spaced longitudinally extending flexible intermediate portions of said wall, said flexible intermediate portions capable of forming a plurality of wings extending from said tube to provide for the discharge of fluid from the passageway out through said wall through the open slits defined between said wings;
- a valve at the distal opening of the tubular member;
- further including at least one restrictor within said passageway for resisting axial flow thereby;
- wherein said at least one restrictor comprises at least one protuberance on said wall within said passageway;
- and
- wherein said at least one protuberance comprises a plurality of spaced, annular ribs.
5 more elements
A catheter comprising;
- an elongated tubular member having a proximal end and a distal end;
- said tubular member having a thin wall defining a passageway extending throughout the length of the tube and forming proximal and distal openings;
- a plurality of circumferentially-spaced longitudinally extending slits through said thin wall adjacent the distal end defining a plurality of circumferentially-spaced longitudinally extending flexible intermediate portions of said thin wall, adjacent said slits;
- said flexible intermediate portions normally forming a plurality of wings extending from said tube with open slits therebetween to provide for the discharge of fluid from the passageway through said open slits in said thin wall near said distal end;
- an external, removable cannula dimensioned to fit over and collapse said tube to its maximum length and minimum width and to compress said wings until they to a position with said slits in a closed position;
- further including at least one restrictor within said passageway for resisting axial flow thereby;
- wherein said at least one restrictor comprises at least one protuberance on said wall within said passageway;
- and
- wherein said at least one protuberance comprises a plurality of spaced, annular ribs.
6 more elements
A catheter comprising;
- an elongated tubular member having a proximal end and a distal end;
- said tubular member including a passageway extending throughout the length of the tube and forming a wall with proximal and distal openings;
- a plurality of circumferentially-spaced longitudinally extending slits through said wall adjacent the distal end defining a plurality of circumferentially-spaced longitudinally extending flexible intermediate portions of said wall, said flexible intermediate portions capable of forming a plurality of wings extending from said tube to provide for the discharge of fluid from the passageway out through said wall through the open slits defined between said wings;
- at least one restrictor within said passageway for resisting axial flow through the passageway, the at least one restrictor located near the distal opening of the tubular member;
- wherein said at least one restrictor comprises at least one protuberance on said wall within said passageway;
- and
- wherein said restrictors comprise a plurality of spaced, annular ribs.
4 more elements
Dependencies are inferred from the claim text.