A tricuspid regurgitation treatment tool to be inserted into the pulmonary artery is proposed. The tricuspid regurgitation treatment tool to be inserted into the pulmonary artery is used to verify whether the right ventricular dysfunction may occur when treating the tricuspid regurgitation by surgeries or other permanent treatments. A test insertion of the tricuspid regurgitation treatment tool to be inserted into the pulmonary artery is made to pass obliquely through the tricuspid valve of a patient, and after a certain time has elapsed, the tool is removed. The tricuspid regurgitation treatment tool to be inserted into the pulmonary artery includes: a blocking part blocking the tricuspid valve; and an insertion tube provided with a guidewire-guiding lumen formed therein to be movable along the guidewire.

A technique for treating or relieving a dysfunctional mitral valve by implanting prosthetic valves (10) in pulmonary veins (PV), optionally at or close to the ostium (VO). The prosthetic valves may function upstream of the mitral valve, to reinforce the mitral valve function and/or to mitigate effects of mitral valve dysfunction. Specific valves suitable for pulmonary vein implantation are described. Also described is a retrieval technique for retrieving and re-collapsing a cardiovascular implant such as a cardiovascular valve after implantation. Also described is a technique of release and repositioning of a cardiovascular valve using the retrieval means.

A valve prosthesis assembly is disclosed. The valve prosthesis assembly comprises a replacement valve comprising an attachment cuff and a graft coupled to the attachment cuff of the replacement valve. The graft extends around a portion of the attachment cuff. A size of the graft is configured to be adjusted based on a degree of damage to the artery of the patient.

An implantable valve prosthesis for preventing blood reflux from a cardiac atrium into a vein opening into the atrium, with a generally tubular stent (2), also a flexible tube (3) that can be closed by collapsing the tube (3) and which is arranged at least in a partial area of a second end section (9) of the stent (2) on the outer peripheral surface. The second end opening (11) of the flexible tube (3) is open in the pressureless state. As a result of this valve design, during a physiological flow out of the pulmonary vein in the direction of the left atrium or out of the caval vein in the direction of the right atrium, there is no rise or an only insubstantial rise in the resistance to flow.

A flow control device for a lobar bronchial passageway including: a one-way valve; a braided wire structural frame, wherein the structural frame is expandable from a collapsed configuration to an expanded configuration; and a sealing membrane mounted to at least a distal portion of the structural frame, wherein the sealing membrane forms an enclosed wall defining at least a portion of an airflow passage through the flow control device, and the one-way valve is included in the airflow passage.

Systems and methods are provided for accessing a renal capsule of a patient's kidney in a minimally invasive manner for therapeutic and/or diagnostic purposes. The method includes advancing the distal end of a catheter into the subcapsular space of the renal capsule and performing the therapeutic and/or diagnostic procedure(s). With access to the renal capsule, the catheter may be used to, for example, remove fluid from the subscapular space, decapsulate the renal capsule by disrupting the fibrous capsule of the renal capsule to relieve renal pressure, displace the fibrous capsule from the kidney, measure/monitor renal pressure within the kidney, and/or deliver drug therapy and/or stem cells, viruses for gene therapy, RNAi, nanoparticles, dyes, etc. to the subcapsular space of the renal capsule.

The present technology relates to interatrial shunting systems and methods. In some embodiments, the present technology includes interatrial shunting systems that include a shunting element having a lumen extending therethrough that is configured to fluidly couple the left atrium and the right atrium when the shunting element is implanted in a patient. The system can also include an energy receiving component for receiving energy from an energy source positioned external to the body, an energy storage component for storing the received energy, and/or a flow control mechanism for adjusting a geometry of the lumen.

Set forth are the structure, function, placement, and applications of vascular valves and servovalves. In the vascular tree, the diversion, shunting, and bypass of flow these provide allow solid organ transplantation which eliminates anoxia and graft organ degradation following harvesting and storage, likely including late term cardiac allograft vasculopathy. Along the lower urinary tract, the diversion of urine from damaged ureters to the native or an artificial bladder or collection bag alleviates problems of intractable urinary incontinence, nocturia, overactive bladder, and frequent urination. Where the lower tract is missing, the synthetics in a valve-based prosthesis preclude infection and degenerative metaplastic transition which can result in malignancy when gut is used to construct a neobladder and/or high maintenance stoma. Accessory channels in side-entry valves and servovalves allow the direct pipe-targeting of medication to sites of disease, anastomoses, or any other trouble spots.

A prosthesis includes a tubular graft, a prosthetic valve component, an inflow stent, an outflow stent, and a plurality of body stents disposed between the inflow and outflow stents. Each stent is a sinusoidal patterned radially-expandable ring having a first set of crowns and a second set of crowns, with the first set of crowns disposed closer to an inflow end of the tubular graft than the second set of crowns. The prosthesis is configured to be resistant to backfolding and/or buckling during deployment thereof.

A self-expandable stent includes a folded cylindrical sheet wall, which is folded along axes parallel to the longitudinal axis of the sheet of the cylindrical wall creating three or more drop shaped loops having an inner diameter and an end portion where the sheet of the cylindrical wall contacts each other along an contact surface parallel to the longitudinal axis, wherein each of the at least three bending loops are rotated towards the end portion of an adjacent loop, wherein the end portion has a curvature describing a bending diameter. The improvement includes providing a stent within a fold and deploy structure being able to exert sufficient compression ratios as well as sufficient radial outward forces on the vessel wall, once deployed.