The invention relates to a medical device, the medical device comprising a balloon catheter, a first stent, and a second stent; the balloon catheter having a shaft and an inflatable balloon mounted to the shaft at the distal end the balloon having a distal portion having a first outer diameter and a proximal portion having a second outer diameter, wherein the first diameter is smaller than the second diameter and a transition region located between the distal portion and the proximal portion, a first stent having a first nominal diameter mounted on the distal portion of the balloon and a second stent having a second nominal diameter mounted on the proximal portion of the balloon, a distal portion of the second stent overlapping a proximal portion of the first stent, wherein the proximal end of the first stent is positioned proximal to the distal end of the second stent, the medical device further comprising a pre-cannulation means providing a passage from the interior of the second stent to the exterior of the first stent passing the stent overlapping portion between the inner surface of the second stent and the outer surface of the first stent.

The present invention provides a stent delivery assembly including: a catheter including a shaft having a proximal end and a distal end, and a balloon provided closer to the proximal end than the distal end on the shaft; and a stent having a tubular shape, and coupled to the balloon to surround an outer circumferential surface of the balloon, wherein the balloon includes a main body having a first end and a second end, the stent is located to be biased towards the first end, such that the main body includes a preferential inflation region exposed to the outside between the second end and the stent, the main body is formed to extend with a diameter that is constant from the first end to the second end, and while the balloon is inflated, a portion of the stent close to the preferential inflation region is inflated in a tapered shape by a force caused when the preferential inflation region is preferentially inflated.

Methods and devices useful, for example, in the field of angioplasty and stenting are disclosed. In some embodiments, the methods, devices and kits are configured for directional expansion inside a lumen, for example of a blood vessel obstructed by plaque. In some embodiments, the directional expansion displaces the plaque in a desired direction.

A multi-stage balloon catheter has a deflated state, a first inflation state at a first pressure and a second inflation state at a higher fluid pressure. In the first inflation state, the multi-stage balloon has a plurality of bulb segments separated by waist hoops that allow the multi-stage balloon to conform to match the curvature of a passageway. When pressure is increased in the multi-stage balloon from the first inflation state to the second inflation state, the waist locations expand either by breaking or stretching the waist restraints or by overcoming expansion resistance incorporated into the balloon material at the waist locations. The multi-stage balloon catheter may be used to implant a stent in a manner to conform and match a curved passageway rather than tending to straighten the passageway.

An occlusion catheter system includes a proximal hub having an inflation connection port and an inflation pathway. An inflation catheter member is connected to the proximal hub and has an inflation lumen. A stiffener member defines a longitudinal axis. The proximal end of the stiffener member is connected to the proximal hub. The stiffener member extends through a portion of the inflation lumen. An occlusion balloon has a proximal balloon end and a distal balloon end. A distal catheter member is positioned substantially on the longitudinal axis and is connected to the distal end of the stiffener member. An atraumatic tip is positioned on a distal end of the distal catheter member. The atraumatic tip has a substantially circular profile in a relaxed configuration. A pressure sensor is connected to the occlusion catheter system distally relative to the occlusion balloon and is connected to a processor by electrical wiring.

The methods and devices disclosed herein promote temporal control of balloon inflation patterns. The devices include a covering for a portion of the balloon that compresses the balloon portion during the inflation process. This enables the distal portion of a balloon to be inflated prior to the proximal portion of a balloon, creating a tapered shape at lower inflation pressures. This is especially useful during transvascular implantation procedures, as it prevents dislodgement of an implant mounted on the balloon. As inflation continues, pressure exerted on the balloon by the covering is overcome such that the proximal region of the balloon inflates, forming a shape with generally straighter sides than the tapered shape, thereby expanding the cardiovascular device.

Various embodiments disclosed relate to drug-coated balloon catheters for treating strictures in body lumens and methods of using the same. A drug-coated balloon catheter for delivering a therapeutic agent to a target site of a body lumen stricture includes an elongated balloon having a main diameter. The balloon catheter includes a coating layer overlying an exterior surface of the balloon. The coating layer includes one or more water-soluble additives and an initial drug load of a therapeutic agent.

A catheter for ultrasonic-driven bladder therapeutic agent delivery, including: a tube having a proximal expandable portion and a distal end, and at least one transducer sleeve accommodating at least one ultrasound transducer mounted on the tube between the proximal expandable portion and the distal end.

Devices, systems, and methods may be used for dilating implants utilizing dilation devices. An implant deployment system may include an inflatable body having a central body configured to press an inner surface of the implant to dilate the implant and having a profile that decreases in diameter along a length of the central body. An inflatable body may include a plurality of segments with varying expansion characteristics.

A balloon is provided for selectively moving an esophagus away from an ablation site. The balloon is received through an oral cavity and into the esophagus of a patient. A deflecting member is provided in the tube, the balloon, or both, so as to selectively distort to bend the balloon and/or the tube to move the esophagus away from the ablation site. The deflecting member may comprise at least one of a strip made of a shape memory material that is responsive to the receipt of a stimulus to deflect to a predetermined shape, a strip that is made of or contains a ferrous material and that deflects in response to the presence of a magnetic field, and a selectively tensionable cable, wire, or string. The deflecting member may be supplemented by a stiffening strip that is located in the balloon and that causes the balloon to expand circumferentially and asymmetrically when inflated.