A cannula for minimally invasive surgical tricuspid valve repair, which is constituted by a tube (5). equipped, at its distal end. with a head (2) consisting of a cone-shaped rigid ring (3) and connected to it on the other side of a flexible ring (4). where the flexible ring (4) in the folded state has a disk shape, and on top of the head (2) there is an axial hole (8) leading to the interior of the cannula (1). and where on the whole length of the head (2) and on a part of the tube (5) near the connection to the head (2), from the inside, there is a thin guide sleeve (6) which, on the section of the rigid ring (3) is permanently attached to the surface of its wall, while on its remaining length, it is slidably movable relative to the wall of the tube (5).

A cryoablation catheter, comprising a balloon (1) and a delivery catheter (2) passing through the balloon (1). The delivery catheter (2) is provided with a fluid inflow cavity (21) and a fluid outflow cavity (22) therein. The fluid inflow cavity (21) extends into the balloon (1), and a side wall of the fluid inflow cavity (21) is provided with a spray head (211) that injects a liquid into the balloon (1). The spray head (211) has a number of spray holes (2111, 2112) circumferentially arranged on the exterior of the fluid inflow cavity (21). An end of the fluid outflow cavity (22) has a cross section (24) that seals the fluid outflow cavity (22), and a side wall of the fluid outflow cavity (22) is provided with a reflow hole (221) in communication with the balloon (1). A fluid flows from the fluid inflow cavity (21) through the nozzle holes (2111, 2112) into the balloon (1). The nozzle holes (2111, 2112) are evenly distributed outside the fluid inflow cavity (21), so that the interior of the balloon (1) is uniformly filled with the refrigeration fluid, ensuring the uniformity of heat exchange at each part of the balloon (1) in an axial direction. The fluid then flows out from the reflow hole (221). The structural design can effectively improve the heat exchange efficiency of the fluid, and the production and processing processes are relatively simple.

Various exemplary methods and devices (10, 110, 210) for delivering liquid therapeutic agents in solid tumors are provided. In general, a delivery device configured to deliver a liquid therapeutic agent into a solid tumor or other soft tissue can be configured to compress tissue and seal any fluid gaps around the delivery device during the delivery of the liquid therapeutic agent. In an exemplary embodiment the delivery device includes three elongate tubular shafts (12, 14, 16, 112, 114, 116, 212, 214, 216) configured to move longitudinally relative to one another. The elongate tubular shafts are configured to cooperate with one another to deliver the liquid therapeutic agent through a passageway of the delivery device to the solid tumor or other soft tissue and seal any fluid gaps around the delivery device while the liquid therapeutic agent is delivered into the solid tumor or other soft tissue.

The invention comprises an indwelling medical device which is capable of delivering a therapeutic agent evenly along the length of the indwelling portion, including the outer wall, of the device.

Provided is a stent pusher assembly for positioning a ureteral stent, the stent pusher assembly having an inner and outer stent pusher. The stent pusher assembly positions the ureteral stent in a patient's kidney and bladder without a bladder fixing portion of the stent entering a ureteral passage-way, thereby minimizing irritation to the patient.

A catheter assembly includes an outer shaft having an outer shaft body forming an outer shaft bore that receives an inner shaft. The outer shaft has a wire transition section. The catheter assembly includes an exit path connector coupled to the outer shaft body at the wire transition section. The exit path connector has a rigid body section separate and discrete from the outer shaft body and coupled to the outer shaft body. The body section defines an exit path connector bore that receives the inner shaft. The body section has a side exit port at a side of the body section being open to the exit path connector bore. The catheter assembly includes a catheter wire passing through the side exit port from an interior to an exterior of the cable exit port.

A treatment method is disclosed, which includes preparing a catheter assembly by inserting an inner catheter into an outer catheter and screwing a protrusion of the outer catheter into a helical groove of the inner catheter; introducing the catheter assembly into the radial artery along a guide wire; pushing the catheter assembly along the guide wire to a target site in front of a stenosis of a blood vessel; releasing the screwing between the helical groove of the inner catheter and the protrusion of the outer catheter after a distal end of the catheter assembly reaches the target site; and causing the outer catheter to abut on at least a part of wall surfaces of a thoracic aorta and an abdominal aorta while drawing a helix and causing the treatment device to protrude from a distal end of the outer catheter at the stenosis.

The present disclosure provides a catheter (100) including a first end (102), a second end (104), and a lumen (106) extending from the first end to the second end. The catheter has a first portion (108) arranged at the first end, a second portion (110) arranged adjacent to the first portion, and a third portion (112) arranged adjacent to the second portion. The first portion of the catheter has a first cut pattern in an exterior surface of the catheter, and the second portion of the catheter has a second cut pattern in the exterior surface of the catheter that is different from the first cut pattern. The third portion of the catheter has a third cut pattern in the exterior surface of the catheter that is different from the first cut pattern and the second cut pattern.

The embodiments described herein relate to a self-positioning, quick-deployment low profile transvenous electrode system for sequentially pacing both the atrium and ventricle of the heart in the “dual chamber” mode, and methods for deploying the same.

A septal cross system is provided for a cerclage procedure for treating dysfunctional heart. The cerclage septal cross system includes a puncture catheter and a capture catheter. The puncture catheter a puncture catheter comprises a first lumen for a guidewire to be inserted thereinto. A coil element is arranged in the distal portion of the puncture catheter. The distal end of the pull-wire is attached to the distal portion of the coil element. The proximal end of the pull-wire is extended to the distal portion of the puncture catheter. The pull-wire is configured to bend inwardly the distal portion of the puncture catheter. A capture catheter comprises a first lumen for a first guidewire to be inserted thereinto and a second lumen for a second guidewire to be inserted thereinto. The distal end of the second wire has a snare wherein the distal portion is deflectable.