A medical tool may comprise a sheath and an elongate instrument. The sheath may comprise a tubular shaft member including a sheath channel and a guard member coupled to a distal portion of the tubular shaft member. The guard member may comprise a rigid distal section and a flexible proximal section that is more flexible than the rigid distal section. The elongate instrument may be sized for passage within the sheath channel. The elongate instrument may comprise a flexible tubular section and a rigid tip extending from a distal portion of the flexible tubular section.

An intravascular heart pump assembly can include a rotor with at least one impeller blade, and a cannula. The present application describes various cannulas that can be manufactured from multiple layers of material to improve flexibility, manufacturability, and durability without increasing an outer diameter of the cannula. In one embodiment, the cannula includes an inflow section having a sheet formed of a shape memory material embedded within a polymer and having at least one lateral hole or aperture in the inflow section. The at least one lateral hole is defined by a first hole in the sheet and a second hole in the outer polymer layer of the cannula. The first hole and the second hole overlap so that blood can enter the cannula through the holes.

A multi lumen catheter comprising a proximal end and distal end said catheter further comprising; a first lumen for a first fluid said first lumen having a first proximal opening and a first distal opening for receiving a fluid, second lumen for a second fluid said second lumen having a second proximal opening and a second distal opening for delivering a second fluid, a third lumen having a third proximal opening and a third distal opening, wherein the first distal opening is arranged with respect to the second distal opening so that when in use at least part of the first fluid which enters the first lumen through the first distal opening has passed across the second distal opening such that the first fluid which enters the first lumen comprise at least a part of the second fluid.

A balloon catheter includes a one-piece extrusion having inner and outer tubular walls, where the inner tubular wall defines a wire guide lumen, and a clearance extending between the inner and outer tubular walls forms an inflation lumen. A balloon is attached to the outer tubular wall and to the inner tubular wall, such that the inflation lumen is in fluid communication with the balloon and the wire guide lumen extends through the balloon. A method of making the balloon catheter is also disclosed.

A multi electrode catheter for non contact mapping of the heart having independent articulation and deployment features.

A drug delivery device includes a blunt cannula and a reservoir. The blunt cannula has a cylindrical wall that defines an axial passage between a first end and a second end of the blunt cannula. The wall has at least a first tapered region at the first end to define an opening in fluid communication with the axial passage and adapted at the first end to resist interruption of fluid flow through the axial passage and out of the first end of the blunt cannula. The reservoir is connected to the second end of the blunt cannula.

A rectal catheter plastic component is a constituent part of a rectal catheter assembly. The one piece plastic component has a cylindrical main body with an outer jacket wall. A connector component end serves for the attachment of a peripheral hose. A free component end serves for rectal insertion. At least one media lumen, extending along the main body, is arranged between at least one media connector port and at least one media opening. The media connector port is located at the connector component end, and the media opening is configured in the free component end. A further balloon-filling lumen, extending along the main body, extends between a filling connector port and a balloon-filling opening. The filling connector port is located at the connector component end, and the balloon-filling opening is configured in a balloon attachment region of the plastic component for the attachment of a balloon cuff.

An intravascular catheter is disclosed that includes an elongated shaft defined by a wall including at least one port extending through the wall into a lumen. At least one channel may be defined between layers of polymer making up the catheter shaft. The channel extends along at least a portion of the shaft and is in fluid communication with the port. Outer and inner diameters of the catheter may be substantially constant along the length of the catheter.

An object of the present invention is to provide a method of joining resin tubes, in which the degree of freedom of selecting a tube material is large, and further a defect such as stiffness and contraction at joining portions of the tubes is not developed. The method of joining resin tubes according to the present invention is a method of joining resin tubes so that a first tube is joined to a second tube, the first tube and the second tube each being made of synthetic resin, the method comprising: a surface activation step of activating each of a joining region of the first tube and a joining region of the second tube; and an adhesion step of adhering the joining region of the first tube obtained via the surface activation step with the joining region of the second tube obtained via the surface activation step to each other.

A microtube guide has a microtube combined with a free-floating and removable core. The microtube is generally hollow with a tube shaft and a distal ring, the tube shaft and the distal ring formed from flexible plastic. The distal ring is conformable to the core and straightenable for insertion into a patient's body, and deploys when the core is withdrawn to form a loop. The core is received by the microtube and is configured to advance into the distal ring to cause a diameter of the distal ring to expand, retract, or straighten. The core comprises a tapered segment that tapers in outer diameter from the diameter of the main core wire to a smaller diameter. A distal end segment of microtubing is frictionally affixed to the tapered segment.