3294results about "Balloon catheter" patented technology

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.

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.

The invention belongs to the technical field of medical instruments, and particularly relates to an integrated plugging balloon suction catheter. The suction catheter comprises a woven mesh tube, the near end of the woven mesh tube is connected with a handle, and the far end opening of the woven mesh tube is used for being close to the thrombus position; the balloon is arranged on the periphery of the woven mesh tube in a sleeving mode, and the balloon is arranged at the far end of the woven mesh tube; the handle comprises a catheter suction port and a filling port, the catheter suction port is communicated with the far port of the woven mesh tube, and the filling port is communicated with the balloon. The aspiration catheter can effectively reduce the occurrence rate of thrombus escape, so that the risk of far-end embolism is reduced, and good prognosis of a patient is achieved through efficient thrombus extraction; and the extra cost of using other instruments can be reduced, so that the comprehensive cost of the operation is reduced, the thrombus extraction success rate is greatly improved, manpower and material resources are saved, and a patient is benefited.

A device may include a flexible tube comprising: a distal end, a proximal tip, the proximal tip comprising a suction line extension being configured for placement in a uterine cavity of a uterus after childbirth, a tube center of the flexible tube; and at least one lumen around the tube center, the at least one lumen comprising a suction line, the suction line being in communication with a source of negative pressure and the suction line extension, the suction line extension being configured for applying the negative pressure to the uterine cavity using the source of the negative pressure thereby causing mechanical hemostasis of bleeding blood vessels of a uterine wall of the uterine cavity. Embodiments include an anchoring mechanism being proximate to the suction line extension along the flexible tube, the anchoring mechanism being configured for maintaining the suction line extension in a desired position within the uterine cavity.

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 as drug delivery.

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 catheter comprises a catheter shaft having a fluid channel, an ultrasound transducer and a compliant balloon mounted on the catheter shaft and having an interior in fluid communication with the fluid channel and containing the ultrasound transducer. The compliant balloon includes a balloon wall having a working section radially surrounding the ultrasound transducer. The working section has a predetermined straightness when the working section has a first diameter and when the working section has a second diameter that is at least 2 mm greater than the first diameter. Other embodiments are also described and claimed.

The invention discloses a bending-adjustable catheter, and relates to the technical field of interventional medical instruments, the bending-adjustable catheter comprises an inner tube, an outer tube, a bending-adjustable supporting tube and a handle, the inner tube comprises an inner tube bending section located at the far end, the inner tube bending section can be bidirectionally bent, and the inner tube bending section at the far end of the inner tube extends outwards from the outer tube; position anchoring of the outer pipe can be achieved through the anchoring structure; the far end of the bending adjusting supporting pipe is connected with the bending adjusting section of the inner pipe, the far end of the outer pipe is fixed to the bending adjusting supporting pipe, and the elasticity modulus of the bending adjusting supporting pipe is smaller than that of the inner pipe. The handle is provided with an inner pipe pushing piece. When the outer tube is anchored to the inner wall of a blood vessel, axial acting force is applied to the inner tube through the inner tube pushing piece, the inner tube control bending section is bent under the action of the axial acting force and supporting force applied by the bending adjusting supporting tube, large-angle bending adjusting can be achieved at the far end of the inner tube, overall rotation of the inner tube and the outer tube is matched, and the far end of the inner tube can rotate in a three-dimensional space. The bending of the adjustable-bending catheter in any direction is realized, and the adjustable-bending catheter can better pass through a roundabout blood vessel.

Delivery systems are used for medical devices. For example, this document describes delivery systems for implantable medical devices such as, but not limited to, prosthetic heart valves that are deliverable in a minimally invasive manner using a system of catheters. The delivery systems may include a valve stop member that establishes the longitudinal position of the prosthetic heart valve on a balloon member. Such a valve stop member can be constructed as a braided wire body or cellular body to provide multiple advantages.

The invention relates to the technical field of medical interventions, and discloses a difficult-to-layer composite woven balloon and a preparation method thereof, the difficult-to-layer composite woven balloon comprises an inner balloon and a fiber line structure woven on the outer surface of the inner balloon; the fiber thread structure is divided into warp threads and weft threads, the fiber threads extending in the diameter direction of the balloon are the warp threads, and the fiber threads extending in the axial direction of the balloon are the weft threads; the inner balloon is sequentially subjected to surface treatment, primer treatment, fiber weaving, surface treatment, surface sizing and surface curing treatment. The preparation process does not need complex special equipment, the material requirement is reasonable, the repeatability is high, the production difficulty and cost are reduced, convenience is provided for large-scale application of the material, and the material has extremely high practical value and popularization potential in medical scenes such as vascular stenosis dilation and calculus dilation pathway establishment.

To provide a device and a method for treating at least one disease by delivering an effective amount of energy and / or formulation to tissue on or near to a body lumen wall.SOLUTION: The formulation can include at least one of a gas, a vapor, a liquid, a solution, an emulsion, a suspension of one or more ingredients, or a combination thereof. The amounts of the formulation and / or energy delivered can be effective to injure or damage tissue, nerves, and / or nerve endings to relieve disease symptoms.SELECTED DRAWING: Figure 7B

Elongate medical devices with an expandable structure including elongated splines and a distal hub. An elongate medical device includes a handle including a control mechanism, a catheter shaft, an expandable structure including elongated splines and a distal hub, wherein each of the elongated splines includes a shape memory material and an interactive element, wherein each of the elongated splines includes a respective spline proximal end and a spline distal end, wherein each of the spline proximal ends is connected to the catheter shaft distal end, and wherein each of the spline distal ends is connected to the distal hub, and a deflection control member connected to the distal hub, wherein the control mechanism is drivingly coupled to the distal hub via the deflection control member and operable to selectively vary a position of the distal hub relative to the catheter shaft distal end to selectively vary an amount of expansion of the expandable structure, wherein a shape of the expandable structure is produced via a combination of the shape memory material and the position of the distal hub relative to the catheter distal end.

The application provides a valve support and an artificial valve with the same, and belongs to the technical field of heart valves. The valve support comprises a support body, a positioning ring and an elastic connecting wire. The positioning ring is arranged in a compressed state and is adapted to be sequentially and serially arranged along an axis with the support body. When the positioning ring is elastically deformed from the compressed state to an expanded state, the positioning ring can be coaxially sleeved on the support body through the traction of the elastic connecting wire. After the valve support is implanted, the positioning ring can be self-expanded to the expanded state through elastic deformation and can be coaxially sleeved on the support body according to the traction of the elastic connecting wire. Therefore, the positioning ring and the support body can be simultaneously positioned during the implantation operation. Due to the traction of the connecting wire, the support body can be self-positioned according to the positioning ring, thereby saving the separate positioning operation of the positioning ring and the support body and making the operation more convenient.

The invention belongs to the technical field of medical instruments, and particularly relates to a portable pneumothorax catheterization device compact in structure and efficient in operation. The portable pneumothorax catheterization device comprises a puncture mechanism, an auxiliary fixing assembly and an adjusting assembly are arranged on the puncture mechanism, and a drainage tube is detachably connected into the puncture mechanism; the end, away from the puncture mechanism, of the drainage tube is connected with the collection bottle, a one-way valve is arranged at the end of the drainage tube, a through hole and a flowing groove are formed in the end, away from the one-way valve, of the drainage tube, and a thin tube is arranged in the drainage tube and communicated with the air bag. According to the safe and reliable portable pneumothorax catheterization device, a supporting cylinder, a limiting block and a reset spring of the puncture mechanism are linked, a puncture needle can be driven to stretch out for puncture by rotating the supporting cylinder, catheter propelling is synchronously completed, and traditional tedious steps such as puncture and incision are omitted; auxiliary instruments such as scissors and pliers are not needed, the problem that a traditional process is complex is solved, the method is suitable for emergency scenes such as pre-hospital first aid and field rescue, and time is won for rescue.

The invention discloses a balloon dilatation catheter, and relates to the technical field of interventional therapy instruments, the balloon dilatation catheter comprises a catheter, a bearing, an anchoring balloon and a nicked balloon, the bearing comprises a bearing inner ring connected with the catheter, and a bearing outer ring sleeving the periphery of the bearing inner ring and capable of circumferentially rotating relative to the bearing inner ring; the anchoring balloon is connected to the bearing outer ring and can expand in the radial direction relative to the catheter, and the anchoring balloon can be anchored in the blood vessel in the expansion state; the nicking balloon is located at the far end of the anchoring balloon and can expand in the radial direction relative to the catheter, and the nicking balloon can conduct extrusion nicking on plaques on the inner wall of the blood vessel in the expansion state. Due to the fact that the bearing outer ring and the bearing inner ring can relatively rotate in the circumferential direction, when the anchoring balloon is anchored, the catheter can rotate relative to the anchoring balloon, the deflection angle of the nicking balloon can be adjusted by rotating the catheter, the nicking balloon can conduct extrusion nicking on plaques at different positions in the circumferential direction of the inner wall of a blood vessel in the multiple nicking processes, and the nicking effect is improved. And the dilation effect of the balloon dilatation catheter on vascular stenosis is improved.

The utility model discloses a thrombus aspiration plugging sheath system based on a special-shaped cavity, which comprises a vacuum device, an aspiration plugging sheath, an aspiration plugging sheath and an aspiration plugging sheath, and is characterized in that the vacuum device comprises a negative pressure needle cylinder and a piston buckle arranged on the side wall of the negative pressure needle cylinder; the balloon sheath tube comprises a tube body, a balloon used for blocking is arranged at the far end of the tube body, a connector connected with the vacuum device is arranged on the side of the near end of the tube body in a supporting mode, and a plurality of special-shaped cavities are formed in the tube body; the thrombus dragging instrument is used for blocking blood flow to reduce blood loss during thrombus suction and intercepting the thrombus to prevent the thrombus from escaping when the thrombus is dragged; the vacuum device is arranged on the side branch of the near end of the balloon sheath tube, and the thrombus dragging instrument is arranged in the balloon sheath tube. According to the embodiment of the utility model, the balloon filling opening and the thrombus suction opening are formed in the catheter body, a multi-cavity structure is adopted, the balloon sheathing canal blocks blood flow, and the thrombus dragging instrument is matched with a vacuum device to suck, drag and take out thrombus.

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.

Embodiments of the invention provide devices and methods for at least one disease by delivering an effective amount of energy and / or a formulation to tissue on or near a body lumen. The formulation may include at least one of a gas, a vapor, a liquid, a solution, an emulsion, a suspension, or a combination thereof of one or more ingredients. The delivered amount of formulation and / or energy may be effective to damage or damage tissue, nerves, and / or nerve endings to relieve disease symptoms.

The utility model is suitable for the technical field related to medical instruments, and provides a valve auxiliary system sheath which comprises a shell assembly and a catheter sheath tube arranged on the shell assembly. The bending adjusting handle is used for adjusting the angle of the tail end of the catheter sheathing canal, and the bending adjusting handle is connected with the shell assembly; the catheter sheath is used for being matched with the catheter sheath tube to achieve introduction of an interventional instrument or conveying of an auxiliary instrument; the flushing valve is used for conveying medicaments, and the flushing valve is communicated with the catheter sheath through an extension tube body; the catheter sheath tube, the catheter sheath, the flushing valve and other components are arranged in a matched mode, so that the dilator can be always kept in the catheter sheath tube in the original position in the process that the catheter sheath tube enters the access blood vessel of a patient, blood cannot permeate out of a product, use is convenient, and the valve positioning accuracy and the operation safety are effectively improved.

A transfemoral system for the localized treatment of aortic valve stenosis comprising a working catheter (3) and at least one tool being configured to slidably move through the working catheter (3); characterized by the fact that said tool is an expandable stent (26) configured to allow an opening of an aortic native valve, the stent (26) furthermore comprising an ultrasonic transducer (25).

A heart valve prosthesis comprising a radially expandable and compressible annular frame is disclosed. The frame comprises a plurality of interconnected rows of cells disposed between an inflow end and an outflow end of the frame, the interconnected rows of cells comprising a plurality of outflow struts defining the outflow end and a plurality of inflow struts defining the inflow end. The frame further comprises a plurality of tip regions formed at the inflow end and the outflow end, each tip region curved between two angled strut portions and forming one of the outflow struts or one of the inflow struts with the two angled strut portions.Each tip region has a reduced width and a length extending at least 25% of the total length of the outflow strut or the inflow strut, the reduced width being less than the width of the two angled strut sections.

A medical device delivery arrangement that includes a medical device, a delivery system, and a filter arrangement. The delivery system includes a catheter and a guide shaft that are configured to move independently from one another. The filter arrangement is configured to move between a constrained-collapsed position and a deployed position. The filter arrangement includes a filter frame and a filter material. The guide shaft is moveable relative to the filter arrangement between a constraining and non-constraining position. The filter arrangement is positioned in the constrained-collapsed position when the guide shaft is in the constraining position due to the guide shaft being positioned partially or fully over the filter arrangement. The filter arrangement is in the deployed position when the guide shaft is in the non-constraining position due the guide shaft being positioned distal to the filter arrangement.

The double-cavity cannula comprises a cannula body, the cannula body comprises an outer tube with an opening in the upper end and an inner tube coaxial with the outer tube, the upper end of the outer wall of the cannula body is provided with a connecting part communicated with the cannula body in a matched mode, a plurality of blood guide side holes are formed in the lower portion of the outer wall of the outer tube, and the opening in the lower end of the inner tube is communicated with a blood guide hopper. A blood return assembly is arranged on the inner wall of the outer tube and above the blood guide hopper, a blood flow guide cover is arranged on the inner wall of a blood return opening of the blood return assembly in a matched mode, a balloon capable of being filled and emptied is arranged on the outer wall of the outer tube and above the blood guide side hole, a filling valve is arranged on one side of the outer wall of the connecting part, and the filling valve is communicated with the balloon through a filling pipeline. When blood is guided, the conditions of local blood vessel wall adsorption and unsmooth blood guiding cannot be easily caused by the design of the blood guiding side holes, and the injection effect, blood turbulence and hemolysis risk increase cannot occur during blood return.

Devices and methods for treating obesity are provided. More particularly, intragastric devices and methods of tracking and locating the same are provided.

This disclosure relates to a catheter system that for precisely positioning fluid flow restrictors within a blood vessel. In particular, this disclosure provides a catheter system that includes a sheath with a first fluid flow restrictor mounted thereto, and a catheter that is slidably disposed within the sheath and has a second fluid flow restrictor mounted thereto. Inside a blood vessel, the sheath and the catheter are separately slidable, thereby allowing the first and second fluid flow restrictors to be positioned at precise locations within the blood vessel.

A system for crimping and expanding a medical device may include a delivery system with a handle, a catheter, and an inflatable balloon. A syringe may receive inflation media and may be configured to be received on a balloon inflation system and to be coupled to the delivery system. A crimper may have a collapsible iris assembly configured to receive the medical device therein. The crimper may be configured to mechanically couple to the balloon inflation system. The balloon inflation system may actuate the crimper to crimp the medical device onto the balloon when the medical device is received within the iris assembly. The balloon inflation system may be configured to actuate the syringe to advance the inflation media from the syringe to the balloon to expand the balloon and to expand the medical device that is crimped onto the balloon.

This application relates to prosthetic heart valves. Disclosed are embodiments of a radially collapsible and expandable prosthetic heart valve. The valve frame can have a tapered profile when mounted on a delivery shaft, with a smaller diameter at the inflow end portion than at the outflow end portion. The valve can include generally V-shaped leaflets, reducing the amount of material in the inflow end of the frame. An outer skirt can be secured to the outside of the inflow end portion of the frame, with longitudinal slack when the valve is expanded and lying flat against the frame when the valve is collapsed. An angularly woven inner skirt can be axially elongated with the frame. Side tabs adjacent the leaflets can extend through and be secured to window frame portions of the frame to form commissures. The window frame portions can be recessed radially inward relative to the surrounding frame portions when the valve is crimped on a delivery shaft.

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 for application of neurostimulation includes an outer sheath, an elongate inner member in the outer sheath and movable relative to the outer sheath. The inner lumen has a distal end. An expandable member is coupled to the distal end of the inner member and is in the outer sheath. The expandable member is self-expanding upon from a compressed state in the outer sheath to an expanded state out of the outer sheath. The expandable member includes a distal portion including a plurality of wires woven together and a proximal portion including the plurality of wires extending parallel to a longitudinal axis. The system includes a plurality of electrode assemblies outward of the expandable member and circumferentially spaced around the expandable member. Each electrode assembly is coupled to two of the wires extending parallel to the longitudinal axis. Each electrode assembly includes a plurality of longitudinally-spaced electrodes.

A cage can be positioned around a medical balloon, such as an angioplasty balloon, to assist in a medical procedure. The cage can include a plurality of strips, each extending between a set of rings including first and second rings. As the balloon expands, the first and second rings move closer together and allow the strips to expand outward. The cage may have wedge dissectors on the strips.