Devices used to deliver a substance within a patient's body are disclosed. The devices may include a microcatheter configured to deliver the substance to a targeted site. The microcatheter may include an expandable member to temporarily restrict blood flow in a vessel, a flow restriction member to restrict flow of material out a distal end of the microcatheter, and a port disposed proximal of the expandable member.

A balloon dilation assembly configured to be used for performing balloon valvuloplasty in order to dilate a stenotic heart valve, in particular a stenotic aortic valve. The assembly comprises at least three outer balloons (12), (13), (14) evenly arranged in a circle around a central balloon (11) and fixed to the central balloon, and comprises a further outer balloon (15) which is shorter in length compared with balloons (11), (12), (13), (14) and which is not fixed to the central balloon, whereby each balloon has a separate filling tube (1), (2), (3), (4), (5) used for inflating each balloon separately, characterized in that the short outer balloon (15) is equipped with a sensing and/or stimulation system comprising an electrical pole (21).

A balloon catheter which allows for faster preparation and more effective purging of air within the catheter, while also providing a more space efficient design, wherein the balloon catheter includes a tubular outer member and a tubular inner member disposed in the lumen of the outer member such that the outer member and inner member define an annular fluid path between them. A balloon is secured to and circumferentially surrounds an outer surface of the distal portion of the outer member. A tubular seal is disposed circumferentially around the inner surface of the distal portion of the outer member. The inner member is movable longitudinally relative to the outer member from a non-sealing position in which the annular fluid path is open, and a sealing position in which the distal portion of the inner member contacts the seal thereby sealing the annular fluid path at the seal.

A balloon catheter which allows for faster preparation and more effective purging of air within the catheter, while also providing a more space efficient design, wherein the balloon catheter includes a tubular outer member and a tubular inner member disposed in the lumen of the outer member such that the outer member and inner member define an annular fluid path between them. A balloon is secured to and circumferentially surrounds an outer surface of the distal portion of the outer member. A tubular seal is disposed circumferentially around the outer surface of the distal portion of the inner member. The inner member is movable longitudinally relative to the outer member from a non-sealing position in which the annular fluid path is open, and a sealing position in which the distal portion of the outer member contacts the seal thereby sealing the annular fluid path at the seal.

A system comprising a multi-sensor catheter for monitoring of a cardiac hemodynamic condition, e.g. heart failure, is disclosed. The multi-sensor catheter comprises multi-lumen catheter tubing comprising first and second optical pressure sensors, and their respective optical fibers and connectors. For right heart and pulmonary artery catheterization, a flow-directed multi-sensor catheter comprises a guidewire lumen, an inflatable balloon tip, and sensor locations are configured for placement of a sensor in each of the right atrium and pulmonary artery, for measurement of central venous pressure in the right atrium and a pulmonary artery pressure. An optical fiber for oximetry may be included. The outside diameter is small enough for insertion through a vein of the arm. For monitoring of a left atrial shunt, sensors of a multi-sensor catheter are configured for measuring pressures upstream and downstream of the shunt, e.g. in the left and right atria, or left atrium and coronary sinus.

The present disclosure, in its various aspects, is directed to expandable guide devices, implementation methods, and related delivery systems. Embodiments according to the present disclosure, including as described herein, may increase the effectiveness and efficiency of endoscopy procedures. In one example, an embodiment includes an expandable guide device, the device configured to slidingly receive an instrument through an instrument lumen of the device. An internal expandable member is disposed within the body and expandable radially from the inward-facing surface of the body, and an external expandable member is disposed about the body and expandable radially from the outward-facing surface. In some embodiments, the external and internal expandable members are balloons and comprise a compliant and a non-compliant material, respectively.

A sheath comprises an elastomeric tube having a self-expanding scaffold coupled to a wall. The scaffold can expand to a diameter larger than the tube diameter to provide an enlarged distal opening. An aspiration catheter has a balloon and an aspiration port so that occlusive material can be removed from a blood vessel by drawing the balloon through the vessel while simultaneously aspirating through the port.

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 is enclosed in the area of multi-way urethral catheters suitable for draining urine or blood from the bladder of a patient. The invention comprises a tube for a urethral catheter (1) comprising at least three channels, wherein an instillation opening (2), at least one drainage opening (3), and a distal balloon (4) are formed in the tube and connected to different channels, the distal balloon (4) is formed in the tip of the tube and the instillation opening (2) is arranged in such a way that instillation liquid exiting such opening directly hits the distal balloon (4), when the distal balloon (4) is inflated. The relative positioning of the instillation opening (2) and the distal balloon (4), combined with the distal balloon (4) positioned in the tip of the tube, provide that instillation liquid exiting the opening is spread through the bladder, after hitting the distal balloon (4).

The disclosed technology includes a balloon guide catheter having a substantially tubular body, an inflation lumen, and a balloon. The tubular body can include an inner hollow lumen and a distal end. The inflation lumen can have a distal end and a proximal section. The distal end of the inflation lumen can be in connection with the tubular body approximate to the distal end of the tubular body. The proximal section of the inflation lumen can extend a majority of the length of the tubular body and can be moveable in relation to the tubular body. The inflation lumen can be positioned within an inner hollow lumen of a tubular body of the catheter or external to the tubular body, thereby enhancing flexibility of the catheter.