A balloon catheter includes a shaft, and a balloon provided outside the shaft. A drug is provided on an outer surface of the balloon, and the balloon has at least a straight tube part. A change ratio of an outer diameter of the straight tube part, (D28−D24)/D24, is 1.1% or less. D24 is the outer diameter of the straight tube part when an internal pressure of 2.43 MPa (24 atm) is applied, and D28 is the outer diameter of the straight tube part when an internal pressure of 2.84 MPa (28 atm) is applied.

A balloon catheter and methods of using same are provided. The balloon catheter can include an expandable structure mounted over a balloon coated with a composition. The expandable structure includes a plurality of axial struts crossing a plurality of radially-expandable rings for constraining the balloon such that isolated balloon regions can protrude through openings in the expandable structure when the balloon is inflated. The balloon catheter can be configured to maximize scraping of the composition from the surface of the balloon by the struts of the expandable structure during balloon inflation.

A balloon catheter includes an inflatable balloon disposed on a tip-end side of the balloon catheter. The balloon includes: an inflatable straight tube portion; and a tip-end side tapered portion tapered from a tip end of the straight tube portion toward the tip-end side. The balloon catheter further includes a plurality of projections that projects from an outer surface of the balloon and linearly extends along the outer surface. The plurality of projections includes: a first projection disposed at the straight tube portion; and a second projection disposed at the tip-end side tapered portion. At least a part of the second projection in a longitudinal direction thereof includes a high projecting part having a larger projection amount than a projection amount of the first projection.

A balloon catheter includes a balloon that is formed of film and includes an inflation/deflation portion. The inflation/deflation portion includes a plurality of linear projections that projects in a thickness direction of the film and extends along a surface of the film. One of the linear projections is an inner projection that projects inside the balloon.

In some examples, a catheter assembly includes a delivery catheter defining a delivery catheter lumen, a delivery catheter handle connected to the delivery catheter, a retrieval catheter defining a retrieval catheter lumen configured to receive the delivery catheter, and a retrieval catheter handle connected to the retrieval catheter. A proximal end of the retrieval catheter handle is configured to removably couple to a distal end of the delivery catheter handle.

The present disclosure provides a device including a cylindrical member having a distal end and a proximal end. The cylindrical member includes a plurality of longitudinal slits positioned between the distal end and the proximal end to thereby create a plurality of strips positioned between the plurality of longitudinal slits. The device also includes an elongated hollow tube having a distal end and a proximal end. The elongated hollow tube is coupled to the proximal end of the cylindrical member. The device also includes a rod having a distal end and a proximal end.

A balloon catheter includes a balloon/shaft assembly and a linear member. The balloon/shaft assembly includes a catheter shaft extending from a proximal end to a distal end and a balloon connected to the catheter shaft. The linear member straddles an inflatable region of the balloon and is mounted on the balloon/shaft assembly. The linear member includes a hard portion and a flexible portion. The hard portion includes at least an outer portion disposed on an opposite side to an inner portion facing the inflatable region, of a portion disposed along an outer peripheral surface of the inflatable region in an inflated state. The flexible portion is a portion other than the hard portion. The flexible portion is extendable and has a lower hardness than the hard portion.

Active Energy Facilitated Drug Delivery platform for delivering therapeutics to biological tissue through electrical conductivity. This delivery method is comprised of an elastic alloy to encase a balloon or drug deposition, where the alloy acts to emit an electric field in aiding and actively allowing the pharmaceutical agent to have enhanced permeation, binding and internalization to cells and the biological matrix. A therapeutic agent is deposited onto a balloon to embody the drug deposition, reservoir whereby the electrical field facilitates the active transfer of a pharmaceutical agent to the target tissue is described.

Dual-access site catheter systems with a blade or scoring functionality entering through a first access site and a balloon functionality for manipulating or driving the blade or scoring functionality through a different site. The blade or scoring functionality also sometimes provides needle or fluid delivery functionality to an atherosclerotic lesion.

A cutting balloon, comprising: a balloon body; cutting wires radially provided along the outer surface of the balloon body; two ends of each cutting wire are respectively fixed at two ends of the balloon body; the cutting wires being of a foldable structure. The surface of the cutting balloon is provided with the flexible cutting wires, so that the cutting balloon has good trafficability, and can cut off plaque tissues during expansion and reduce intimal injury; moreover, the cutting wires are fixed on the surface of the cutting balloon or can slide along a telescoping direction, thereby avoiding the problem of displacement or winding in the cutting process; furthermore, the arrangement of the foldable structure can provide axial-length compensation for the cutting wires during expansion of the balloon, and can also improve the friction between the balloon body and vascular walls and ensure the balloon not to be displaced