A catheter adapter may include a distal end, a proximal end, an inner surface extending through the distal end and the proximal end and forming a lumen, and a side port forming a side port pathway through a sidewall of the catheter adapter and in fluid communication with the lumen. The catheter assembly may include a catheter extending distally from the distal end of the catheter adapter. The catheter assembly may include a septum disposed within the lumen proximal to the side port pathway. The catheter assembly may include one or more features to facilitate flushing of the catheter assembly: a diameter of the side port may increase in a distal direction; a portion of the inner surface proximal to the catheter and distal to the septum may include multiple grooves; the side port pathway may include a non-cylindrical portion; an insert; a rotation element; and a pivot element.

A catheter having a multilumenal tube surrounded by a slotted hypotube is provided. The catheter has a tube holder that houses the multilumenal tubing and slidably engages the hypotube, and has internal passages configured to receive one of more tubes from the multilumenal tube. The multilumenal tubing separates into one or more tubings, each comprising a lumen, such that the tubings exit the tube holder at different locations. The slotted hypotube slidably engages a key in the tube holder that prevents the multilumenal tubing from rotating relative to the tube holder and the one of more tubings that separate from the multilumenal tubing. Advantages provided by the slotted hypotube/tube holder assembly are described.

A delivery device may comprise a sheath configured to be inserted into a body lumen of a patient. The sheath may have a proximal end, a distal end, a first channel extending within the sheath from the proximal end to the distal end, and a second channel extending within the sheath from the proximal end to the distal end. A collective cross-sectional area of the first channel and the second channel may be more than 50% of a total cross sectional area of the sheath. The device may also be comprised of a handle at the proximal end of the sheath, wherein the handle is configured to provide fluid communication between a first port and the first channel and a second port and the second channel.

The present invention is directed to a dual lumen cannula configured to be inserted into a patient's body as simple as a single lumen cannula. The dual lumen cannula includes at least one inner lumen configured to be inserted into an outer lumen and connected via an inner lumen connection unit and an outer unit connection unit. Embodiments of the presenting invention further allow for the connection of at least one flow router to the other end of the inner lumen connection unit. When installed, the outer lumen is first inserted into the patient's body, followed by the insertion of the inner lumen into the outer lumen of the already cannulated patient until the inner lumen connector unit is in coupling contact with the outer lumen connector unit. The invention is also directed to a transformable dual lumen cannula into a single lumen cannula and vice versa that allow patients that are first being treated by low flow approach to be treated by high flow approach.

A method, system and apparatus for performing an interventional procedure, the method includes retrograde advancement of a first guidewire into the femoral artery and advancing a sheath system over the guidewire and inserting the distal end of a sheath system through an incision and into the femoral artery of the patient. The sheath system comprises a retrograde sheath having an antegrade sheath removably connected thereto, wherein the retrograde sheath comprises a lumen extending between a retrograde sheath distal end and a retrograde sheath proximal end and wherein the antegrade sheath comprises a lumen extending between an antegrade sheath distal end and an antegrade sheath proximal end, the access sheath system further comprising separable section connecting the retrograde sheath to the antegrade sheath. The method further includes separating the retrograde sheath from the antegrade sheath via the tear away section, and performing an antegrade interventional procedure.

A bidirectional vascular cannula device includes a tube and a moving mechanism having a through hole. The tube includes a tubular wall which defines therein a passage having opposite proximal and distal opened ends. The tubular wall has a secondary opening formed therethrough. Oxygenated blood infused into the passage from the proximal opened end is delivered to one end of the blood vessel from the distal opened end, and a part of the blood is delivered to the other end of the blood vessel through the secondary opening and the through hole so as to obviate ischemic caused by cannula occlusion. The moving mechanism is operable to be moved to permit a part of the moving mechanism to project outwardly and to be attached to the inner wall of the blood vessel for positioning the cannula device.

A device for catheterization is disclosed. Such a device includes a hollow catheter, a cylindrical sheath, and a flange through which the catheter passes. Before insertion, the sheath begins at a first opening near the catheter tip and extends into the catheter to a first circumferential fold, then back towards the catheter tip to a second circumferential fold about the tip to the exterior surface, and ends at a second opening attached to the flange. As the device is inserted up to a length, the flange abuts the cavity opening, and a corresponding length of the sheath deploys from the catheter interior, around the first and second circumferential folds, to the catheter outer surface. Once fully inserted, all, or a substantial portion, of the sheath initially positioned within the catheter has been deployed to the outer surface, thereby forming a protective barrier between the catheter and the surrounding tissues.

A catheter may include a catheter body having a tubular shape, a cuff encircling the catheter body, and a wire mesh attached to and encircling the catheter body. The cuff may be configured for facilitating fibrous tissue growth. The wire mesh may be configured for radially expanding away from the catheter body.

An introducer assembly includes a catheter having a proximal end, a distal end extending to a distal tip of the introducer assembly, and an outer catheter wall. The catheter includes a medical device holding portion proximate the distal end, a guide wire lumen extending between the proximal and distal ends, and a side opening extending through the outer wall to the guide wire lumen. The side opening and the guide wire lumen are simultaneously open and the guide wire lumen and side opening are able to receive a guide wire therethrough. The catheter is flexible at least in the location of the side opening. The catheter also includes a plurality of one stiffening mandrel lumens extending from the proximal end and a plurality of stiffening mandrels.

A valve for controlling material flow through a catheter, comprises a first flexible member including a first moveable element, wherein, when the first moveable element is in the open position, material may flow past the first flexible member through a first lumen of the catheter and, when the first moveable element is in the closed position, flow through the first lumen is prevented and a first biasing member coupled to the first flexible member for biasing the first moveable member toward the closed position.