199 results about "Dilatation catheter" patented technology

Sinusitis, mucocysts, tumors, infections, hearing disorders, choanal atresia, fractures and other disorders of the paranasal sinuses, Eustachian tubes, Lachrymal ducts and other ear, nose, throat and mouth structures are diagnosed and / or treated using minimally invasive approaches and, in many cases, flexible catheters as opposed to instruments having rigid shafts. Various diagnostic procedures and devices are used to perform imaging studies, mucus flow studies, air / gas flow studies, anatomic dimension studies and endoscopic studies. Access and occluding devices may be used to facilitate insertion of working devices such asendoscopes, wires, probes, needles, catheters, balloon catheters, dilation catheters, dilators, balloons, tissue cutting or remodeling devices, suction or irrigation devices, imaging devices, sizing devices, biopsy devices, image-guided devices containing sensors or transmitters, electrosurgical devices, energy emitting devices, devices for injecting diagnostic or therapeutic agents, devices for implanting devices such as stents, substance eluting or delivering devices and implants, etc.

Devices, systems and methods useable for dilating the ostia of paranasal sinuses and / or other passageways within the ear, nose or throat. A dilation catheter device and system is constructed in a manner that facilitates ease of use by the operator and, in at least some cases, allows the dilation procedure to be performed by a single operator. Additionally, the dilation catheter device and system may be useable in conjunction with an endoscope and / or a fluoroscope to provide for easy manipulation and positioning of the devices and real time visualization of the entire procedure or selected portions thereof. In some embodiments, an optional handle may be used to facilitate grasping or supporting a device of the present invention as well as another device (e.g., an endoscope) with a single hand.

A dilatation balloon catheter which is capable of being removed from a patient while leaving a guide wire in place has a longitudinal slit extending from its proximal end to a position near its inflatable balloon. The catheter has an inflation lumen for applying fluid to inflate the balloon, and an insertion lumen through which the guide wire passes. The slit communicates with the insertion lumen so that the catheter can be peeled off of the guide wire as the catheter is withdrawn from the patient and the guide wire remains in place in the patient.

At the present time, physicians often treat patients with atrial fibrillation (AF) using radiofrequency (RF) catheter systems to ablate conducting tissue in the wall of the Left Atrium of the heart around the ostium of the pulmonary veins. These systems are expensive and take time consuming to use. The present invention circular ablation system CAS includes a multiplicity of expandable needles that can be expanded around a central axis and positioned to inject a fluid like ethanol to ablate conductive tissue in a ring around the ostium of a pulmonary vein quickly and without the need for expensive capital equipment. The expansion of the needles is accomplished by self-expanding or balloon expandable structures. The invention includes centering means so that the needles will be situated in a pattern surrounding the outside of the ostium of a vein. Also included are members that limit the distance of penetration of the needles into the wall of the left atrium, or the aortic wall. The present invention also has an important application to ablate tissue around the ostium of one or both renal arteries, for the ablation of the sympathetic nerve fibers and / or other afferent or efferent nerves going to or from each kidney in order to treat hypertension.

At the present time, physicians often treat patients with atrial fibrillation (AF) using radiofrequency (RF) catheter systems to ablate conducting tissue in the wall of the Left Atrium of the heart around the ostium of the pulmonary veins. These systems are expensive and take time consuming to use. The present invention circular ablation system CAS includes a multiplicity of expandable needles that can be expanded around a central axis and positioned to inject a fluid like ethanol to ablate conductive tissue in a ring around the ostium of a pulmonary vein quickly and without the need for expensive capital equipment. The expansion of the needles is accomplished by self-expanding or balloon expandable structures. The invention includes centering means so that the needles will be situated in a pattern surrounding the outside of the ostium of a vein. Also included are members that limit the distance of penetration of the needles into the wall of the left atrium. The present invention also has application to ablating tissue around the ostium of a renal artery for the treatment of hypertension.

Dilatation balloons and catheters including same are provided. The balloons are fabricated of a biaxially orientable material such as a nylon or a polyamide material, and they have an inflated, non-distended working profile as well as a stretched inflated profile which is achieved by applying pressure through a dilatation catheter or the like that is in excess of that needed to achieve the inflated, non-distended profile and which is adequate to effect dilatation or the like up to a maximum pre-bursting pressure application. The maximum pre-bursting size of the balloon can be tailored depending upon the needs of the particular balloon within a wide range of possible maximum pre-bursting sizes.

Dilatation balloons and catheters including same are provided. The balloons are fabricated of a material such as a nylon or a polyamide material, and they have an inflated, non-distended working profile as well as a stretched inflated profile which is achieved by applying pressure through a dilatation catheter or the like that is in excess of that needed to achieve the inflated, non-distended profile and which is adequate to effect dilatation or the like up to a maximum pre-bursting pressure application. The maximum pre-bursting size of the balloon can be tailored depending upon the needs of the particular balloon within a wide range of possible maximum pre-bursting sizes.

At the present time, physicians often treat patients with atrial fibrillation (AF) using radiofrequency (RF) catheter systems to ablate conducting tissue in the wall of the Left Atrium of the heart around the ostium of the pulmonary veins. These systems are expensive and take time consuming to use. The present invention circular ablation system CAS includes a multiplicity of expandable needles that can be expanded around a central axis and positioned to inject a fluid like ethanol to ablate conductive tissue in a ring around the ostium of a pulmonary vein quickly and without the need for expensive capital equipment. The expansion of the needles is accomplished by self-expanding or balloon expandable structures. The invention includes centering means so that the needles will be situated in a pattern surrounding the outside of the ostium of a vein. Also included are members that limit the distance of penetration of the needles into the wall of the left atrium, or the aortic wall. The present invention also has an important application to ablate tissue around the ostium of one or both renal arteries, for the ablation of the sympathetic nerve fibers and / or other afferent or efferent nerves going to or from each kidney in order to treat hypertension.

A multi lumen catheter is made from a number of thin walled flexible tubes bonded together to form an inner lumen. The inner lumen can withstand vacuum when the outside tubes are pressurized. During insertion the tubes are compressed and collapsed. The tubes expand by the pressure of the pumped fluid. At the point the catheter enters the body the expansion is restricted to a smaller diameter than the rest of the catheter.

A catheter for crossing an occluding lesion with an inflatable balloon and dilating the lesion includes an inner tube that defines a longitudinal axis. The balloon includes a distal section that is bonded to the tube's distal end, a working section, and a conically shaped distal transition section connecting the working and distal section. A plurality of rigid ribs are spaced around the circumference of the balloon near the catheter's distal end. Each rib includes a first elongated portion attached to the balloon's distal section and aligned substantially parallel with the longitudinal axis. A second portion extending from the first portion and at an angle thereto is attached to and lies along the surface of the balloon's distal transition section. The plurality of ribs combine to simulate a stiff, tapered surface that can be wedged into the occluding lesion to create a passageway to cross the lesion with the balloon.

A method and apparatus for repairing a vessel at a bifurcation, such as an aorto-ostium, without obstructing blood flow through the bifurcation. Delivery system having an anchor mechanism for positioning an expandable ostial stent within a diseased portion of a bifurcation so that the tubular body of the stent is seated within a side branch to the bifurcation, thereby repairing the vessel at the bifurcation without occluding blood flow. The anchor mechanism includes a plurality of wing-like members for holding the stent at a desired location in the side-branch of the main vessel. The stent delivery system may be used with a dilation catheter prior to deploying the anchor mechanism and stent.

The invention relates to a balloon dilatation catheter for an interventional therapy technology. The balloon dilatation catheter comprises an ultra-soft head end 1, a dilation balloon part 2, a distal-end rod body 4, a proximal-end rod body 5 and a Luer joint 6, wherein an inner tube 3 for guiding a guide wire to pass is arranged in the catheter, and a development ring for marking the effective length of a dilation balloon is pressed on the inner tube. The balloon of the balloon dilatation catheter adopts a secondary stretching process for forming, and a balloon cone and the wall thickness of a connecting neck can further become thinner through second stretching; the connection between the balloon and the distal-end rod body is as follows: the balloon connecting neck is arranged at the inside and the distal-end rod body is arranged at the outside; and simultaneously, the distal-end rod body of the balloon dilatation catheter comprises two sections, namely a proximal-end rod body connecting section with a larger outer diameter and a balloon connecting section with a smaller outer diameter. The dilation balloon part of the balloon dilatation catheter and the balloon connecting section of the distal-end rod body in the balloon dilatation catheter disclosed by the invention have smaller diameters, thereby ensuring that a whole conveying system catheter has the ability of traversing blood vessels or lesion parts with smaller diameters.

The invention provides a sacculus dilatation catheter for blood vessel dilatation surgery. The sacculus dilatation catheter comprises a sacculus, a push rod, an inner tube and a connecting device, wherein the push rod is positioned between the sacculus and the connecting device and connects the sacculus and the connecting device, and the inner tube extends and passes through the internal spaces of the sacculus and the push rod. The sacculus dilatation catheter is characterized in that: at least one of the push rod and the inner tube is made of weaving silk reinforcing tube. The sacculus dilatation catheter can smoothly pass through circuitous, diffuse calcification and even long-segment occlusive blood vessels in vascular disease interventional therapy surgery.

The invention belongs to the technical field of medical apparatuses and instruments, and particularly relates to a drug coating balloon dilatation catheter and a preparation method thereof. The drug coating balloon dilatation catheter comprises a balloon dilatation catheter body and a drug coating. The drug coating coats the surface of the balloon dilatation catheter body. The drug coating includes an outer layer and an inner layer, the outer layer is a water soluble protecting layer, and the inner layer is an effective drug and an excipient, the mass ratio of the effective drug to the excipient is 1:(0.2-2), and the mass ratio of the inner layer to the outer layer is 1:(0.3-3). The preparation method comprises the steps that the balloon dilatation catheter is placed into spraying equipment, after an inner layer coating solution is prepared, inner layer coating is performed, then, outer layer coating is performed, drying and folding are performed, the catheter body is sleeved with a protective cover, and the drug coating balloon dilatation catheter is obtained.

An apparatus for providing support along the length of a catheter is described. The present invention consists of a mandrel fabricated from a non-metal. The mandrel extends through the lumen of a dilatation catheter to provide added support and stiffness to the catheter shaft. The stiffness along the length of the non-metal mandrel may easily be varied by making dimensional or morphological changes to the polymeric mandrel.

A fixed wire dilatation catheter for treating the vasculature of a patient. The dilatation catheter includes an elongated member that has a distal end portion which can be elongated to puncture through blockages within the blood vessels. The dilatation catheter also includes an expandable device located along the elongated member at a location proximal the distal end portion of the elongated member.

The invention relates to the minimally invasive therapy technology and a minimally invasive therapy instrument, in particular to a method and instrument for forming a targeted balloon of a living body catheter cavity, namely a minimally invasive surgery method and instrument for carrying out targeted rear urethra balloon dilatation forming on the rear narrowed urethra of the male, wherein the rear narrowed urethra might be caused by the BPH, a tumor, an inflammation and the like. The targeted dilatation balloon dilatation catheter is provided with at least one targeted dilatation balloon, wherein one cavity is used for draining or conveying body liquid or gases and another cavity is used for filling a targeted catheter cavity dilatation balloon. At least a row of protrusions for targeted dilatation forming or a protrusion for targeted dilatation forming is arranged on the surface of the targeted dilatation balloon in the direction of the long axis. The protrusions or the protrusion for targeted dilatation forming aligns with a zone or a part, needing targeted dilatation forming, of the catheter cavity and expands in a certain manner, at a certain speed and under the certain pressure to form the balloon. Thus, the targeted dilatation forming protrusion or protrusions form selective partial high intensity of pressure and high shearing force on the targeted forming zone of the catheter cavity and targeted dilatation forming of the catheter cavity is achieved.

The invention provides a dual balloon hemangiectasis catheter for treating vessel blockage, comprising a wire guide tube and a catheter body which are coaxially connected and a balloon connected on a far end part of the catheter body. The catheter body is formed by a wire guide cavity, a first filling cavity and a second filling cavity, and tube walls of the cavities are connected and fixed with one another; the balloon part is designed by adopting an inner layer and an outer layer of the balloon in two specifications which are coaxially sleeved by taking the wire guide tube as a central axis; the layers of the balloon are centralized in sequence from the inside to the outside, and two balloon cavities are respectively communicated with the first filling cavity and the second filling cavity; and the wire guide tube is positioned on the position inside the inner balloon and on the central axis of the two balloons, and is communicated with the wire guide cavity of the catheter body. The catheter can well solves problems caused by an improper single balloon specification or a broken single balloon in a surgery, and overcomes the defect that in the conventional dual balloon catheter, either the balloon part comprises a pressurizing tube to cause oversized cross section area after the balloon is folded, or three cavities of the catheter part are in a free state to cause inconvenient operation.

The invention relates to a multifunctional balloon dilatation catheter. The multifunctional balloon dilatation catheter comprises an inner catheter body, an outer catheter and a dilatation balloon, wherein a wire guide channel is formed in the inner catheter body, the outer catheter body and the inner catheter body are coaxially arranged, and the dilatation balloon is fixed to the outer catheter body. The multifunctional balloon dilatation catheter further comprises plugging balloons fixed to the outer catheter body, the plugging balloons and the dilatation balloon are arranged at intervals, a low-pressure transmitting channel, a high-pressure transmitting channel and a sucking channel are formed between the outer catheter body and the inner catheter body in the radial direction, and the outlet ends of the low-pressure transmitting channel, the high-pressure transmitting channel, the sucking channel and the wire guide channel are provided with Ruhr connectors respectively. By means of the multifunctional balloon dilatation catheter, small plaque falling from a lesion site is trapped in closed space formed by the plugging balloons, the dilatation balloon and the blood vessel wall and pumped away in time while balloon dilatation is carried out in a PCI operation; in the operation process, balloon dilatation and thrombus aspiration are completed at a time under the condition that devices are not needed to be replaced, the number of times of medical instrument exchange in the body of a patient is decreased, and therefore complications caused by blood injures of the patient are reduced.