6509results about "Balloon catheter" patented technology

A prosthetic heart valve may include a balloon-expandable frame extending between an inflow end and an outflow end, a plurality of prosthetic leaflets mounted within the frame, and an inner skirt positioned between the plurality of prosthetic leaflets and the frame. The frame may include a first row of diamond-shaped cells at the inflow end of the frame, a second row of diamond-shaped cells, and a row of outflow cells positioned at the outflow end of the frame. Each cell in the row of outflow cells may not be diamond-shaped, and, in an expanded condition of the frame, each cell in the row of outflow cells may have a larger area than that of each cell in the first and second rows of diamond-shaped cells. Each outflow cell may be at least partially defined by a commissure attachment feature, and each outflow cell may lack symmetry.

The invention is a delivery catheter, e.g., a guide catheter, having an imaging element in proximity to the distal end of the catheter. Catheters of the invention are able to placement of the catheter in proximity to an ostium, thereby increasing the efficiency of contrast delivery while reducing the risk of ischemia due to blocked blood supply. The invention additionally assists in maintaining catheter position during delivery of a fluid from the catheter, resulting in better performance with less fluid. For example, a catheter of the invention can be used to produce improved fluoroscopic images with less overall contrast. This improvement reduces the risk of an allergic reaction to the contrast while decreasing the length of time for a procedure, i.e., because of a need to re-contrast.

Devices are provided with an internal dimension that can be reduced and increased in vivo. In one example, an interatrial shunt for placement at an atrial septum of a patient's heart includes a body. The body includes first and second regions coupled in fluid communication by a neck region. The body includes a shape-memory material. The body defines a passageway through the neck region for blood to flow between a first atrium and a second atrium. The first and second regions are superelastic at body temperature, and the neck region is malleable at body temperature. A flow area of the passageway through the neck region may be adjusted in vivo.

The present invention relates generally to improved systems and methods for removing undesirable material residing in vessels. More specifically, the present invention relates to systems and methods for using at least one cannula to remove substantially en bloc, from a site of obstruction or interest, undesirable material without fragmentation and without excessive fluid loss.

A system includes a uterine manipulator having a shaft. The uterine manipulator is coupled with the robotic arm. An imaging instrument is operable to provide an image of an exterior of the uterus of the patient. A console includes a display screen and is configured to provide a view from the imaging instrument of the exterior of the uterus of the patient, on the display screen. The console is further configured to provide an indicator on the view from the imaging instrument, on the display screen, the indicator indicating a location of a predefined anatomical structure, the indicator being provided as an overlay on the predefined anatomical structure.

Various embodiments of the systems, methods and devices are provided comprising angioplasty to break up calcification or other tissue in occlusive areas within a blood vessel. The various embodiments disclosed comprise pressure pulse periods designed to break up calcified occlusive material through a cyclically stretching of the vessel walls without damaging the vessel wall tissue.

The present invention discloses a presettable artificial biological aortic valve which comprises a valve seat (1), a valve leaflet stent (2) and three valve leaflets (3), wherein the valve seat (1) is a one-way limiting expandable annular metal seat; the head end of each seat body unit (4) is sequentially provided with a first rivet (7), a limiting protrusion (6) and a first long circular groove (5) from the outside to the inside; the tail end of each seat body unit (4) is sequentially provided with a second long circular groove (8), a second limiting hole (10) and a first limiting hole (9) matched with the limiting protrusion (6), and a second rivet (11) matched with the first long circular groove (5). The presettable artificial biological aortic valve has an original preset state and a normal use state after one-way limiting expansion.

Methods and system for atrial fibrillation ablations and other cardiac procedures utilizes a cardiac mapping system for navigation and guidance, and includes an additional virtual reality (VR) system and an augmented reality (AR) or mixed reality (MR) system. The Cardiac mapping system utilizes medical images and patient's electrical signals. The virtual reality (VR) system is utilized pre-procedure for visualization and pre-procedure planning. The augmented reality (AR) or mixed reality (MR) system is utilized pre-procedure or intra-procedure. Methods and system are disclosed utilizing pre-built virtual device models which interact with 3D volume rendered structures from patient's CT or MRI of the region of interest (ROI) for the different type of cardiac procedure. With virtual reality (VR) the operator utilizes hand-held sensors. With augmented reality (AR) or mixed reality (MR) a combination of hand gestures and an X-box controller is used to manipulate virtual devices, anatomical structures in the Hologram.

The invention provides a balloon dilatation catheter, and belongs to the technical field of balloon dilatation catheters. The balloon dilatation catheter comprises a catheter body, the far end of the catheter body is provided with a balloon body used for dilating a narrow part, and the near end of the catheter body is provided with an operating handle used for charging and discharging a filling medium into the balloon body. A flow channel allowing blood to penetrate through is formed in the balloon body and / or between the balloon body and the outer side wall of the catheter body in the axial extending direction of the catheter body, in the working process, after the balloon body is filled, a narrow part is treated, and the blood in the narrow part penetrates through the flow channel to continue to be circulated. The balloon is mainly used for solving the technical problems that in the prior art, when a balloon dilates, blood flow is blocked, consequently, far-end blood supply is insufficient, and the drug transfer effect is affected due to insufficient contact time of the balloon and the blood vessel wall.

An intravascular blood pump (1) comprises a ring seal (10) that is configured to assume a collapsed configuration and an expanded configuration and configured to contact and seal against an inner wall of the patient's blood vessel when inserted therein in the expanded configuration. A support member (12; 13) is disposed inside the ring seal (10) in order to support the ring seal (10) from the inside, wherein the support member (12; 13) is configured to collapse at least partially when a predetermined pressure difference between a proximal area and a distal area of the blood vessel acting on the ring seal (10) is exceeded.

Methods of treating a central airway obstruction (CAO), benign airway stenosis, asthma, chronic obstructive pulmonary disease (COPD), or an airway tumor in a human subject, methods of treating chronic rhinosinusitis (CRS) or chronic rhinosinusitis with nasal polyps (CRSwNP) in a human subject, methods of treating a eustachian tube disorder in a human subject, and devices and systems for performing the methods. A method of treating a central airway obstruction (CAO), benign airway stenosis, asthma, chronic obstructive pulmonary disease (COPD), or an airway tumor in a human subject includes inserting a drug-coated balloon catheter into a target site in a trachea, mainstem bronchus, bronchus intermedius, lobar bronchus, segmental bronchus, or sub-segmental bronchus, wherein the balloon is coated with a coating layer including the therapeutic agent and one or more additives. The therapeutic agent includes paclitaxel, sirolimus, or a derivative thereof. The method includes inflating the balloon to dilate the airway and deliver a therapeutic agent to the airway wall. The method includes deflating the balloon. The method also includes withdrawing the balloon catheter from the target site.

Balloon catheters, sleeves, cages, cylindrical structures and endoluminal prostheses are provided with stress-applying and spacing features coupled to expandable surfaces thereof. At least one or at least some stress-applying features are immobilized onto the surface or into pre-formed indentations formed in the expandable surface. The stress-applying and spacing features may have blunt and / or rounded contact regions which contact tissue or calcified regions in the vasculature. The contact regions dent or fracture occlusive material on the wall of a vascular lumen and / or patient valve leaflets when expanded. The spacing of features can permit blood, drug, and contrast perfusion past structures expanded in the vasculature, particularly balloon catheters.

Embodiments of the present invention are directed to the treatment of hypertension, diabetes, obesity, heart failure, end-stage renal disease, digestive disease, urological disease, cancers, tumors, pains, asthma, pulmonary arterial hypertension, and chronic obstructive pulmonary disease by delivering of an effective amount of formulations at desired temperature to target tissue. The formulations include gases, vapors, liquids, solutions, emulsions and suspensions of one or more ingredients. The temperature may enhance safety and efficacy of the formulations for the treatments. The amounts of the formulation and / or energy are effective to injury or damage the tissues to have a benefit of symptom relive.

To provide a device and a method for treating at least one of hypertension, pulmonary arteries, diabetes, obesity, heart failure, end-stage renal disease, digestive disease, urological disease, cancers, tumors, pain, asthma or chronic obstructive pulmonary disease by delivering an effective amount of a formulation to a tissue.SOLUTION: In embodiments of the present invention, the formulation may include at least one of a gas, a vapor, a liquid, a solution, an emulsion or a suspension of one or more ingredients. In embodiments of the present invention, amounts of the formulation and / or energy are effective in injuring or damaging tissue, nerves and nerve endings in order to relieve disease symptoms.SELECTED DRAWING: Figure 3B

A method of implanting a prosthetic heart valve may include inserting a delivery catheter into a patient's vasculature while the prosthetic heart valve is in a crimped condition on the delivery catheter. The delivery catheter may be advanced through the patient's vasculature until the crimped prosthetic heart valve is positioned within a native valve annulus. While the prosthetic heart valve is within the native valve annulus, a first stage of deployment may be performed in which the balloon is inflated at a first rate of inflation to begin expanding the prosthetic heart valve. After performing the first stage of deployment, a second stage of deployment may be performed in which the balloon is inflated at a second rate of inflation that is greater than the first rate of inflation. After performing the second stage of deployment, the prosthetic heart valve may be anchored within the native valve annulus.

Systems and methods for native heart valve repair includes an anchor. The anchor includes an anchor body configured to transition from a first configuration, in which the anchor body is straightened for transvascular delivery to the native heart valve, to a second configuration comprising at least two turns for implanting at the native heart valve. Two or more of the at least two turns in the second configuration have a diameter smaller than a major axis of the native heart valve.

A heart valve prosthesis for replacing a diseased native valve in a patient. The valve prosthesis includes a compressible and expandable frame structure and an anchor connected to an outer periphery of the frame structure. The anchor comprises a helical wire having a free end. The valve may further include a valve segment mounted within the frame structure and expanded with the frame structure. The frame structure may be configured for receiving a valve segment.

A system for delivering a prosthetic heart valve may include, a handle, an outer catheter, an inner catheter, a nose cone coupled to the inner catheter, and an inflatable balloon having a proximal leg coupled to the outer catheter and a distal leg coupled to the nose cone or the inner catheter. A first valve retainer may be coupled to the inner catheter and positioned within the balloon. In an assembled state of the first valve retainer, an inner stop is directly fixed to the inner catheter and an outer stop is positioned around and coupled to the inner stop. The inner stop has a maximum outer diameter that is smaller than a maximum inner diameter of the distal leg. In the assembled condition of the first valve retainer, the outer stop has a maximum outer diameter that is larger than the maximum inner diameter of the distal leg.

Various embodiments of the systems, methods and devices are provided comprising angioplasty to break up calcification or other tissue in occlusive areas within a blood vessel with automated adaptation to volume and / or pressure data that is outside of reaction windows having predetermined boundaries. The various embodiments disclosed comprise pressure pulse periods designed to break up calcified occlusive material through a cyclically stretching of the vessel walls without damaging the vessel wall tissue.

A medical device capable of improving handling properties and maintaining excellent insulation properties of conductive wires for supplying electricity to electrodes for performing treatment includes: an elongated shaft part having a guide wire lumen formed therein, the guide wire lumen being open at a distal part; a plurality of electrodes which are disposed on the distal side of the shaft part, extend in the longitudinal direction of the shaft part, and are deformable in the radial direction of the shaft part; and a plurality of conductive wires which extend from the proximal side of the shaft part to the distal side thereof and transfer electricity to an electrode layer. The conductive wires extend inside the electrodes and outside the guide wire lumen, and are electrically connected to the electrodes at the distal side of the electrodes.

A delivery apparatus can include a handle, a first shaft extending from the handle and having a proximal end portion coupled to the handle and a distal end portion and a second shaft extending coaxially over the first shaft and having a proximal end portion coupled to the handle and a distal end portion. The delivery apparatus can further include a shoulder coupled to the distal end portion of the second shaft and having a flared end portion configured to abut a prosthetic valve positioned around the first shaft in a radially compressed state, an extension portion extending from the shoulder, and at least one radiopaque marker disposed on the extension portion at a location within the prosthetic valve when the prosthetic valve is in a radially compressed configuration on the first shaft.

The present disclosure relates to balloon assemblies designed to permit blood flow through a central perfusion channel, at least when blood flows in a proximally-oriented direction. Such a balloon assembly can include one or more toroid balloons, each defining a cavity that can be independently fed by one or more inflation tubes coupled thereto to inflate the balloon. When the toroid balloons are inflated within a patient lumen or a prosthetic device, such as a prosthetic heart valve, blood is allowed to flow through the perfusion lumen. A balloon assembly can further include a flexible valve configured to regulate blood flow when the balloon assembly is inflated, to allow proximally directed flow through a channel formed in a flexible funnel thereof, and prevent backflow in the opposite direction.

Methods and devices for treating nasal airways are provided. Such devices and methods may improve airflow through an internal and / or external nasal valve, and comprise the use of mechanical re-shaping, energy application and other treatments to modify the shape, structure, and / or air flow characteristics of an internal nasal valve, an external nasal valve or other nasal airways.

A computer readable medium comprising instructions to be executed by one or more processors, the instructions configured to cause a system to estimate, based at least in part on signals received from a first position sensor of an expandable assembly disposed along a longitudinal axis, a position and longitudinal direction of the first position sensor; and estimate, based at least in part on signals received from a second position sensor of the expandable assembly, a position of the second position sensor. The instructions are further configured to cause the system to project the estimated position of the second position sensor on an axis defined by the longitudinal direction of the first position sensor and correct the estimated position of the second position sensor by projecting the estimated position of the first position sensor.

The present disclosure relates to the technical field of medical devices, and in particular to catheter implant systems and included associated device, prosthetic heart valves and method. The interventional delivery system included includes a catheter assembly and a control handle connected to the catheter assembly, the catheter assembly has opposing distal and proximal ends and includes an inner sheath and an outer sheath slidably engaged with each other, the outer sheath includes a loading section and a sheath section in sequence from the distal end to the proximal end, the loading section is configured to enclose and keep the interventional device in a compressed state; the control handle includes a main handle and an auxiliary handle slidably fitted over the inner sheath, the proximal end of the inner sheath is connected to the main handle and the proximal end of the outer sheath is connected to the auxiliary handle.

The invention is directed to a device (1) for sealingly protective and at the same time stool-discharging tamponade of a circular anastomosis of two ends of the large intestine, as occur for example in the surgical resection of a rectal carcinoma, wherein a thin-walled balloon body (5) is placed in the region of the anastomosis, and the balloon (5), providing a tamponade, is filled with a filling medium in such a way that the lowest possible pressure necessary for the sealing tamponade of the anastomosed portion of the intestine can be maintained continuously, and, even in the event of a peristaltic contraction of the rectosigmoid colon, the pressure predefined by the user is maintained as constant as possible, wherein sufficiently high volumetric flows of the pressurizing medium supplied to and removed from the balloon (5) are achieved, such that the sealing contact between the balloon (5) and the intestinal wall is maintained in all segments of the balloon body in the course of a peristaltic contraction wave miming from the sigmoid to the anus.

The invention discloses a bio-based polyamide elastomer as well as a preparation method and application thereof. A hard segment domain of the bio-based polyamide elastomer is formed by polymerizing aliphatic straight-chain dibasic acid and aliphatic straight-chain diamine, and a soft segment domain of the bio-based polyamide elastomer is formed by polymerizing aliphatic straight-chain dibasic acid and polyether amine. According to the preparation method, the polyamide salt solution and the polyether amine salt solution are firstly prepared respectively, then the bio-based polyamide elastomer with the hard segment domains and the soft segment domains being alternately blocked is obtained through reaction copolymerization of the two salt solutions, and through control of the soft segment domains, the bio-based polyamide elastomer has good strength and flexibility and good biocompatibility, and can be used for preparing the bio-based polyamide elastomer with the hard segment domains and the soft segment domains being alternately blocked. The problems that an existing elastomer is low in strength, poor in biocompatibility and the like are solved.

A catheter system can include a tubular body, and at least one of a targeting system coupled to the tubular body, an expandable member, or a fluid injection port. A method of identifying a bifurcation can include inserting a catheter system into a first vessel, positioning the catheter system at a first location, expanding an expandable member to occlude the first vessel, delivering contrast material so the contrast material pooling proximate to the expandable member, and reviewing a shape of the contrast material in the first vessel under fluoroscopy.

An atraumatic vessel occlusive system includes a flexible tubular member with an infusion lumen, a vessel occluder mounted at the distal end of the tubular member, and a pressure sensor located within a chamber defined by the occluder. The occluder has a braided construct provided with a fluid impermeable membrane over its proximal portion and a fluid permeable covering over its distal portion. The pressure sensor is adapted to sense pressure within the vessel through the fluid permeable membrane without being subject to the effects of turbulent flow at the exit of the infusion lumen. The accurately sensed pressure can be used to determine a dwell time for the occluder.

Systems and methods can involve wedge dissectors attached to strips in turn attached to medical balloons, for forming serrations within vascular wall tissue for angioplasty as well reducing vessel recoil, reducing residual stenosis, and increasing volumetric blood flow post angioplasty. The design, methods of use, intended outcomes, and process to build this type of balloon is described herein.