124 results about "Balloon dilations" patented technology

Embodiments of the present disclosure are related to devices and techniques for para-valve sealing of an expandable stent-valve implanted using a catheter. In some embodiments, a stent-valve is provided which comprises a seal sleeve / cuff containing material that swells when contacted by blood. A piercing tool may be included and used to permit a user to puncture the sleeve / cuff prior to introduction into a patient's body. In some embodiments, the sleeve / cuff has an integral tubular structure configured to withstand balloon expansion of the stent-valve during or after implantation.

A device and method for dilating a Eustachian tube of a patient is disclosed. The device includes a guide catheter and a balloon dilation catheter. The balloon dilation catheter has an actuator that prevents injury to the middle ear. The balloon dilation catheter is slidably coupled with the guide catheter through the guide catheter lumen and is fully inserted into the guide catheter lumen when the distal side of the actuator is adjacent to the proximal end of the guide catheter. The method involves advancing the guide catheter and balloon dilation catheter through a nasal passage of the patient to dilate a portion of the Eustachian tube.

The present invention provides a stent delivery catheter that can place a stent in a tortuous narrowed area with good maneuverability while preventing falling or displacement of the stent. The present invention provides a stent delivery catheter for delivering a stent for treating stenosis in a body to a narrowed area. A distal end of the catheter includes a collapsible balloon in a collapsed state and the stent in an undeployed state, the stent being mounted on the outer surface of the collapsed balloon, the balloon having frustoconical tapered segments and a cylindrical straight tubular segment. An inner tube for defining a guidewire lumen extends into the interior of the balloon, and displacement prevention mechanisms for preventing the stent from moving in the longitudinal direction of the stent delivery catheter are affixed to the inner surface of the balloon only. Another aspect of the present invention provides a stent delivery catheter that can prevent the stent from moving in the axis direction of the catheter without requiring additional components or additional steps that complicate the manufacturing process. In this catheter, the thickness T1 of a near-center portion of the distal-end tapered segment and the thickness T2 of a near-center portion of the straight tubular segment satisfy a predetermined relationship, and the thickness T3 of a near-center portion of the proximal-end tapered segment and the thickness T2 of the near-center portion of the straight tubular segment satisfy a predetermined relationship. In this manner, the distal-end and proximal-end tapered segments in the collapsed state prevent the movement of the stent. The present invention also provides a preferable RX balloon catheter, i.e., a stent delivery catheter, having improved maneuverability and enhanced responsiveness for expansion and contraction of the balloon without complicating the manufacturing process or increasing the cost.

A method of treating a constricted sinus passageway of a patient includes traversing the canine fossa region of the patient so as to form a passageway in the sinus cavity. A cannula is positioned in the passageway. A visualization tool such as an endoscope is passed through a lumen or channel in the cannula to aid in visualization of the anatomical site of interest. A balloon dilation catheter is then deployed through or along the cannula so as to place the balloon within or across the constricted anatomical space (e.g., ostium). The balloon is then expanded so as to expand at least a portion of the constricted anatomical space. Alternative embodiments include the use of an optional guide wire and incorporating a endoscope lumen through the balloon dilation catheter.

A balloon catheter having a balloon with a reduced slippage lubricious coating, and a method of performing a medical procedure such as a balloon dilatation procedure in a patient's blood vessel. The second coating (i.e., the balloon coating) is lubricious to facilitate movement of the catheter in the patient's body lumen, yet has sufficiently low lubricity such that the slippage of the inflated balloon from a desired site within the blood vessel is reduced compared to a balloon coated with the first lubricious coating.

A dilating and support apparatus with disease inhibitors and methods for use is disclosed that is particularly useful for repairing and / or serving as a conduit for body passageways that require reinforcement, dilatation, disease prevention or the like. Such apparatuses are utilized to deliver a therapy, that therapy being from a family of devices, drugs, or any of a variety of other elements to a specific location within the body. The instant disclosure provides a system of combining a novel radial deployment and / or drug delivery therapy with existing balloon dilatation therapy into one device. This combination will yield a significant decrease in cost to the healthcare system as well as providing a therapy to the patient with increased safety and efficacy. Further, the instant invention provides a novel and improved platform for synthetic / tissue interface between the device and the body.

Embodiments of the present disclosure are related to devices and techniques for para-valve sealing of an expandable stent-valve implanted using a catheter. In some embodiments, a stent-valve is provided which comprises a seal sleeve / cuff containing material that swells when contacted by blood. A piercing tool may be included and used to permit a user to puncture the sleeve / cuff prior to introduction into a patient's body. In some embodiments, the sleeve / cuff has an integral tubular structure configured to withstand balloon expansion of the stent-valve during or after implantation. In some embodiments, the seal is provided as a separate component from the stent-valve.

A balloon dilation catheter comprising a tubular member having a proximal end and a distal end. An inflatable balloon is disposed at the distal end of the tubular member. A first lumen is disposed in the tubular member and in is communication with an interior of the inflatable balloon. A second lumen is disposed in the tubular member for receiving a guidewire substantially along a portion of its length. The second lumen has a first opening in the proximal region of the tubular member and a second opening at the distal region of the tubular member. A first slit is disposed longitudinally in the tubular member and extends along at least a portion of the tubular member, the first slit comprising a first pair of longitudinal edges in a side by side relationship. The tubular member is constructed of a resilient material such that, as the guidewire is separated from the second lumen, the longitudinal edges are biassed open from a first position to a second position having a gap greater than or equal a diameter of the guidewire. The subject balloon dilation catheter provides improved rapid exchange advantages of either the catheter or the guidewire used in a catheterization technique.

The invention provides a thrombus taking device applied to artery and venous thrombus, and belongs to the field of a medicine appliance. The thrombus taking device applied to artery and venous thrombus comprises a guide wire, a guiding catheter, a collecting assembly and an inner sheath, wherein the guiding catheter and the collecting assembly are respectively arranged on the guide wire in a sleeving way; the inner sheath is arranged on the guiding catheter in a sleeving way; the collecting assembly has a folding state extending into the guiding catheter and an unfolding state extending out toan upstream position of the guiding catheter; the collecting assembly comprises a filtering screen sleeve, an elastic framework and a constraint wire; the filtering screen sleeve is provided with a sealed opening end and an open opening end; the sealed opening end is positioned in an upstream position of the open opening end and is connected with the guide wire; the elastic framework is connectedwith the open opening end; the head end of the constraint wire is connected with the elastic framework; and the tail end of the constraint wire is arranged in the guiding catheter in a penetrating way. The thrombus taking device can be used for taking out thrombi and tumor emboli, and can be used for effectively preventing the risk of generation of distal embolization in in the thrombus taking process and in various intracavitary therapy processes such as endovascular balloon dilatation, angioplasty, thrombectomy and stent implantation.

The invention provides a balloon dilatation catheter, for solving the problem that with the existing medicine balloon, a large amount of medicine overflows in the medicine delivery process, consequently, serious injuries are caused to the surrounding normal tissues by the large amount of overflowing medicine. The balloon dilatation catheter provided by the invention comprises a first dilatation balloon and at least one micropore catheter arranged in a manner of spanning the surface of the first dilatation balloon, wherein each micropore catheter comprises at least one micropore cavity protruding out of the surface of the micropore catheter and communicating with the inner cavity of the micropore catheter, each micropore cavity is formed in the area, spanning the surface of the first dilatation balloon, of the micropore catheter, and the inner cavity of each micropore catheter is a therapeutic agent first injection cavity. When the first dilatation balloon dilates, the micropore cavities arranged on the micropore catheters protrude out along the surface of the balloon and are inserted into the superficial part of the lesion tissue or the lumen, then a treatment agent is delivered, so that the use amount and overflowing amount of the treatment agent are effectively reduced, and therefore, the injuries caused to the surrounding normal tissues, mucous membranes, lumen and the like are reduced.

A medical apparatus for widening a stenosis or for deploying a stent in a patient. The apparatus has a central axis and an inflatable outer dumbbell-shaped balloon. The apparatus is insertable into a lumen of a patient for movement of the balloon therein between a deflated configuration and an inflated configuration. The balloon stays in position over the stenosis or the area in need of the stent when it is inflated. The apparatus can include a flexible support member mounted on the external surface of the balloon with at least one microsurgical blade, which forms an effective cutting edge upon inflation of the outer balloon. The apparatus can also include one or more inner balloons that allow higher dilation pressures to be generated from inside the outer balloon. The apparatus can also include a hollow central core that may permit ventilation of the airway during the dilation process.

A transcatheter valve prosthesis includes a balloon expandable stent and a prosthetic valve. An inflow portion of the stent includes a plurality of crowns and a plurality of struts with each crown being formed between a pair of opposing struts. Endmost inflow side openings and endmost inflow crowns are formed at the inflow end of the stent and the inflow end of the stent has a total of twelve endmost inflow crowns. An outflow portion of the stent includes a plurality of crowns and a plurality of struts with each crown being formed between a pair of opposing struts. Endmost outflow crowns are formed at the outflow end of the stent and the outflow end of the stent has a total of six endmost outflow crowns. The prosthetic valve is disposed within and secured to the stent.

The invention belongs to the field of medical instruments, and particularly relates to an expansion balloon and medical device used for discoplasty. The expansion balloon provided by the invention comprises a compressed, collapsed or folded balloon main body; the balloon main body is annular after a pressurizing medium fills to make the balloon main body expand; an annular first cavity is arrangedin the balloon main body, and is used for injecting bone cement; the bone cement is supported in intervertebral disc tissue space after being solidified, and the balloon can prevent the problem of leakage and dispersion of the bone cement; the interior of the balloon main body is provided with a second cavity penetrating through the balloon main body; the second cavity is used for injecting a material with an osteogenesis effect and / or an osteoinduction effect; after the bone cement fills to make the balloon expand, the material with the osteogenesis effect and / or the osteoinduction effect isinjected into the second cavity penetrating through the balloon main body through a second injection port; and the material injected into the second cavity forms osteoblasts in the cavity in the intervertebral disc or induces local cells of a human body to differentiate to form the osteoblasts, so that the balloon and the upper intervertebral disc and the lower intervertebral disc are fused intoa whole.

The invention discloses a multi-guide wire medicine balloon dilation catheter and a using method thereof. The dilation catheter comprises a tail end tube, a balloon with a medicine coating on the surface and a catheter body with double channels. A first guide wire can sequentially penetrate through the tail end tube and a first through hole, passes the outer surface of the balloon, and then entersone channel of the catheter body through a second through hole, wherein the ligature of the first through hole and the second through hole is parallel to the axis of the balloon; the dilation catheter further comprises at least one second guide wire, the second guide wires are arranged outside the balloon, and at least extend to the other end from one end of the balloon, and the length of the second guide wires is larger than that of the balloon in a retracted state. In the scheme, with the multiple guide wires, a lesion position can be sufficiently incised, the size is reduced, and the dilation catheter enters the lesion position easily, and meanwhile reduces damage to an internal membrane; the tracing property of the catheter along the guide wires is improved, an overall pushing effectis improved, severe lesion positions can be treated, and the treatment effect is improved since restenosis caused by balloon dilation performed on vessels is effectively prevented in combination withthe medicine coating.

A multi-element, vascular stent may be used to maintain or enhance patency of a blood vessel. The stent may be used in peripheral blood vessels, which may be long and / or tortuous. By using multiple, separate stent elements that are balloon expandable, the multi-element stent may be stronger than a traditional self-expanding stent but may also be more flexible, due to its multiple-element configuration, than a traditional balloon-expandable stent. The distance between stent elements may be based on characteristics of the stent and the target vessel location such that the stent elements do not touch one another during skeletal movement. Thus, the multi-element, vascular stent described herein may be particularly advantageous for treating long lesions in tortuous peripheral blood vessels.

The invention relates to an aorta valve stent conveying system which comprises a push release device for conveying an aorta valve stent. Particularly, the aorta valve stent conveying system further comprises a special-shaped balloon catheter arranged at the front end of the push release device, the special-shaped balloon catheter comprises a balloon, the balloon is provided with a cylindrical connecting portion and a balloon expanding portion communicated with the cylindrical connecting portion, and the cylindrical connecting portion is connected with the front end of the push release device; according to the design of the balloon, after expansion, a positioning face is formed in the side, close to the cylindrical connecting portion, of the balloon expanding portion, when the aorta valve stent conveying system is in use, the balloon expanding portion of the balloon is located inside a left ventricle outflow tract and tightly fits the bottom of the human aorta valve through the positioning face, and the effects of positioning and reducing and / or resisting valve leakage are achieved.

The invention discloses a rapamycin nanoparticle for use in porous percutaneous transluminal angioplasty. The invention also relates to a preparation method of the rapamycin nanoparticles. The rapamycin nanoparticle disclosed by the invention comprises a polymer core and a phospholipid shell, wherein the polymer core is formed by polymerizing rapamycin and non-biodegradable macromolecules. The advantages of different materials are utilized, slow in-vivo delivery of indissolvable drugs is achieved, and the affinity of the nanoparticles to diseased region tissue is improved. By cooperatively combining with a perforated balloon and combining the advantages of balloon dialation for the treatment of arterial embolism and the targeted action of anti-intimal hyperplasia drugs on local vessels toprevent restenosis, the rapamycin nanoparticle disclosed by the invention can effectively play a good treatment effect in the aspect of cardiovascular intervention treatment. The preparation method provided by the invention is simple, and can realize both small-scale production and large-scale production in a laboratory.

The invention relates to an uninterrupted blood flow cryoablation system, which comprises a balloon catheter, a bracket catheter and a guide wire, wherein the balloon catheter and the bracket catheterare connected through the guide wire; the balloon catheter comprises an abnormal-shaped balloon, a guide pipe, an injection adapter and a handle, and the abnormal-shaped balloon, the guide pipe, theinjection adapter and the handle are connected in sequence; the abnormal-shaped balloon is internally divided into three inner cavities, wherein the three inner cavities are independently connected with the injection adapter and the handle through the guide pipe; the bracket catheter comprises a pushing rod internally provided with a wire guiding cavity; the pushing rod comprises a bracket component, an inner pipe, an outer sheathing pipe and a sealing switch; and the guide wire comprises a pre-shaping structure positioned on the front end of the guide wire. According to the uninterrupted blood flow cryoablation system disclosed by the invention, through the guide wire, the guidance insertion of the cryoablation system is improved, through the supporting of the bracket component, a stablechannel is formed on the inner side of the balloon, vascular thrombosis due to balloon dilatation compression can be avoided, meanwhile, liquid nitrogen can be continuously input under an uninterrupted blood flow situation, the liquid nitrogen can be repeatedly and circularly pumped out and injected, and consequences of distal critical ischemia and the like due to target vessel occlusion during anoperation can be avoided.

The invention discloses an expansion balloon with a convex-concave surface. The expansion balloon is used for expansion treatment of vascular and non-vascular stenosis. Protrusions and grooves are formed in the outer surface of the convex-concave expansion balloon, the protrusions and the grooves are evenly distributed on the outer side of the convex-concave expansion balloon in a continuous (thread-shaped) and / or discontinuous (crawler-shaped) mode, and the protrusions and the grooves in the convex-concave expansion balloon can be integrally formed when the balloon is formed, or formed twiceon the surface of the formed traditional balloon. When the balloon is expanded, the protrusions on the outer surface of the balloon concentrate pressure in the balloon, the high-pressure expansion effect is achieved, stress is uniform, and expansion is safer; a groove part on the outer surface of the balloon can be used for loading medicines, so that the loading capacity of the medicines can be remarkably increased, and the loss of the medicines in the conveying process is reduced; in a thrombus aspiration catheter, the thrombus aspiration effect can be improved; and the balloon can prevent astent from falling off in the conveying process when the stent is conveyed, and the use is safer.

The invention discloses an integrated multifunctional double-balloon catheter, and relates to the technical field of medical instruments. The integrated multifunctional double-balloon catheter comprises a catheter body, a guide wire cavity is formed in the catheter body, a contrast agent outlet is formed in the end, close to the guide wire cavity, of the catheter body, the outer side of the catheter body is sleeved with a first radiopaque ring, a calculus removing balloon is installed on the catheter body, an air bag air outlet is formed in the calculus removing balloon and connected with the catheter body, and a dilation balloon is installed on the catheter body. According to the integrated multifunctional double-balloon catheter, the length of a narrow section of the digestive tract can be accurately measured during digestive tract dilation, the dilation effect can be evaluated through the calculus removing balloon at the front end, the calculus removing balloon and the dilation balloon are arranged on the catheter body, so that the catheter can be used for realizing conventional dilation and calculus removal operations in endoscopic retrograde cholangiopancreatography (ERCP), the manufacturing cost is lower than that of two instruments, and the cost performance is high.

The invention discloses an elastic adjustable type single-cavity balloon dilatation catheter. A handle is a bidirectional handle; the distal end is a connection port; the proximal end is an injection port; the connection port of the distal end is connected with the proximal end of the catheter; the proximal end of the balloon is welded to the distal end of the catheter by hot-melting; the distal end of the balloon is welded to the outer surface of the distal end of a guide wire by hot-melting; the outer surface of the guide wire is provided with a thermoplastic cannula; the proximal end of the thermoplastic cannula is provided with an elastic element formed by winding; the elastic element is fixed to the catheter. According to the elastic adjustable type single-cavity balloon dilatation catheter, the guiding function can be quickly realized by simple operation; the proximal end of the upper guide wire is provided with the elastic element connected with the catheter, so that the elastic element can adjust automatically when the balloon is expanded, and the stability of the entire device is improved; the inner cavity of the catheter is provided with a plurality of reinforcing ribs to maintain the trafficability characteristic of products; the entire guide wire only needs to be connected to the distal end of the catheter, thereby saving the guide wire usage amount, and saving production costs.

The invention discloses a visual three-level paranasal sinus balloon dilatation irrigation catheter system. The visual three-level paranasal sinus balloon dilatation irrigation catheter system comprises a catheter assembly, a guide assembly, a visual shooting assembly and a handle assembly, wherein the first end of the catheter assembly penetrates through the handle assembly and is embedded in theguide assembly, and the second end of the catheter assembly is exposed out of the handle assembly; the catheter assembly comprises a connecting pipe and a three-level balloon arranged on the connecting pipe; the first end of the guide assembly is detachably connected with the handle assembly, and the second end of the guide assembly is exposed out of the handle assembly; the visual shooting assembly is detachably connected to the catheter assembly; and the guide assembly comprises a guide catheter, and a bent part is further arranged at the end of the guide catheter and made of a flexible material. According to the visual three-level paranasal sinus balloon dilatation irrigation catheter system, the visualization function, the guiding function, the balloon dilatation flushing function andthe imaging function can be integrated into a whole, balloons of three different diameters can be integrated, the visual three-level paranasal sinus balloon dilatation irrigation catheter system is simple, convenient to use and effective, and the operation time is shortened.

The invention provides a balloon dilation catheter component and relates to the technical field of medical instruments. A wire guide passage and a balloon inflation passage are arranged in a main guide tube of the balloon dilation catheter component; the wire guide passage runs through the main guide tube along the extension direction of the main guide tube; a support tube made of stainless steelis arranged in the wire guide passage. The support tube made of stainless steel allows the step to be omitted where a fascial dilator is used to carry out pre-dilating; the main guide tube with a guide sheath is inserted directly along a guide wire; the risk that shearing action of the fascial dilator for pre-dilating causes injury to subcutaneous muscles and renal parenchymal tissue is decreased.In addition, the support tube helps improve the rigidity of the component herein; a false passage is rarely formed during insertion; no bending occurs; inserting is easier. When the balloon is fullyinflated, the end, close to the head, of the main guide tube, of the balloon is 60-90 degrees angled to the axis of the main guide tube. The balloon dilation catheter component also comprises a dilating sheath that is tearable.

The invention relates to a balloon catheter conveying device for intracranial angioplasty. The device comprises a conveying catheter, and the conveying catheter is provided with a conveying catheter inner cavity used for enabling a corresponding guide wire and a stent to pass through; an inflatable balloon is arranged at the far end of the conveying catheter, and a guide pipe with the length of 8-20 mm is arranged at the end, away from the conveying catheter, of the inflatable balloon; the guide pipe is a plastic guide pipe or a pre-plastic guide pipe with a bent section, and the guide pipe isprovided with a guide pipe inner cavity which is communicated with the conveying catheter inner cavity and allows the guide wire and the stent to pass through. The balloon catheter conveying device which is used for intracranial angioplasty and capable of precisely guiding the balloon and the stent to a lesion position is provided.