A device for treating esophageal target tissue comprises a catheter, a balloon and a refrigerant delivery device. The catheter has a distal portion and a refrigerant delivery lumen. The balloon is mounted to and the refrigerant delivery device is coupled to the distal portion. The refrigerant delivery device comprises a chamber with the refrigerant delivery lumen opening into the chamber, a refrigerant delivery opening fluidly coupled to the balloon interior, and a distribution passageway fluidly coupling the chamber and the refrigerant delivery opening. A refrigerant is deliverable through the refrigerant delivery lumen, into the chamber, through the distribution passageway, through the refrigerant delivery opening and into the balloon interior so to place the balloon into an expanded, cooled state so that the balloon can press against and cool esophageal target tissue. The medical device may include means for sensing a leak in the balloon.

An arrangement for implementing kissing balloons simulating a bifurcated vessel, including a first catheter having a first inflatable balloon, a second catheter having a second inflatable balloon, wherein the first balloon includes a holding element that is adapted to receive and hold a distal end of the second balloon and upon inflation of the first balloon and the second balloon to allow formation of a kissing surface between respective facing surfaces of the first balloon and the second balloon inside the holding element, wherein the holding element is designed and connected to the first balloon to prevent the distal end of the second balloon from passing through the holding element. A kit including the arrangement for implementing kissing balloons and a method of manufacturing the arrangement.

Catheter devices/systems and methods therefrom are described herein for treating acute kidney injury, especially the contrast-induced acute kidney injury wherein the devices may prevent the contrast dyes from entering into kidney and/or facilitate blood flow of kidney by said catheter system.

A balloon catheter includes a hollow shaft, and an expandable and contractable balloon that covers at least a part of an outer periphery of the hollow shaft. The balloon has a first joint joined to the outer periphery of the hollow shaft, a second joint on a proximal end side with respect to the first joint and joined to the outer periphery of the hollow shaft, and an expandable section continuous with the first joint and the second joint. The first joint is wholly located inside the expandable section. A distal end of the first joint part is spaced apart from a distal end of the hollow shaft toward a proximal end side.

A balloon catheter includes a tubular inner shaft, a balloon partly covering the inner shaft and having a distal end joined to the inner shaft, and a tubular outer shaft accommodating a part of the inner shaft. The outer shaft includes a balloon joint joined to a base end of the balloon and a reduced diameter area being accommodated in the balloon and having a smaller outer diameter than the balloon joint part, and is joined to the inner shaft in the balloon. A communication hole provides a flow path between the expansion lumen and the inside of the balloon. In the balloon, an outer diameter on the outermost periphery of a structure formed by the inner shaft, the X-ray opaque marker, and the outer shaft decreases continuously or stepwise from the base end toward the distal end of the balloon.

An arrangement for implementing kissing balloons simulating a bifurcated vessel, including a first catheter having a first inflatable balloon, a second catheter having a second inflatable balloon, wherein the first balloon includes a holding element that is adapted to receive and hold a distal end of the second balloon and upon inflation of the first balloon and the second balloon to allow formation of a kissing surface between respective facing surfaces of the first balloon and the second balloon inside the holding element, wherein the holding element is designed and connected to the first balloon to prevent the distal end of the second balloon from passing through the holding element. A kit including the arrangement for implementing kissing balloons and a method of manufacturing the arrangement.

A balloon catheter includes an outer tube that has an inner surface and an inflation lumen and an inner tube that is disposed within the inflation lumen. The balloon catheter also includes a collar that has a proximal end coupled to a distal end of the outer tube, and a distal end. The collar is coupled to an edge of the distal end or the inner surface of the outer tube. The balloon catheter further includes a luminal space, which is defined by a space between the outer surface of the inner tube and the collar, and a balloon. The balloon has a proximal end coupled to the collar and a distal end coupled to the inner tube.

The invention discloses an auxiliary balloon structure for transcatheter aortic valve replacement (TAVR), which comprises a balloon head and a balloon body. When unexpanded, the balloon body has two conical ends and a cylindrical middle part. The conical ends are defined as a front and a rear conical part. The cylindrical middle part is provided with a mastoid structure. The front and rear conical parts are made of a semi-compliant material, while the cylindrical middle part is made of a non-compliant material.

An apparatus includes a catheter having a balloon including at least one first radiopaque marking. A guidewire guides the balloon to the treatment area, and includes at least one second radiopaque marking adapted for corresponding to the at least one first radiopaque marking of the balloon when positioned at the treatment area. Related aspects and methods are disclosed.

Systems, devices, and methods including balloon catheters are described. In one embodiments, a balloon catheter assembly may comprise a tubular member having a proximal portion and a distal portion with a lumen extending between the proximal portion and the distal portion and a balloon member having a proximal waist portion, a distal waist portion, and an expandable region therebetween, the balloon member disposed proximate the distal portion of the tubular member and bonded to tubular member. The assembly may further comprise a first sleeve member covering a first portion of the tubular member and a portion of the balloon member proximal waist portion and a second sleeve member covering a second portion of the tubular member and a portion of the first sleeve member.