216 results about "Balloon dilatation catheter" patented technology

A system for percutaneously introducing a prosthetic valve into a patient's vasculature comprises a balloon dilatation catheter, a prosthetic valve mounted coaxial to the dilatation balloon, and a pusher member comprising a longitudinally extending tubular member encompassing the shaft of the catheter. The distal end of the pusher member preferably corresponds to the proximal end of the stent component of the prosthetic valve. The pusher member provides enhanced longitudinal pushability for facilitating advancement of the prosthetic valve to a treatment site. The system is well-suited for advancing a prosthetic valve or other medical device through an introducer sheath having a relatively small inner diameter. The introducer sheath may be formed with a tapered proximal end portion for receiving the prosthetic valve and for reducing a diameter of the prosthetic valve during advancement therethrough.

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 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.

A thin-walled sheath is placed over a balloon having an antirestenotic drug placed on the balloon of a balloon dilatation catheter. The sheath protects the drug from dissolution into the blood and allows improved delivery to the lesion site. A rolling action of the sheath prevents the drug from loss due to shearing motion. The sheath can also provide a protected surface for carrying the drug and providing exposure to the lesion site for delivery of the drug. The sheath can also serve as a delivery sheath for providing delivery of a stent via a single catheter introduction for drug delivery and stent delivery.

A balloon dilation catheter includes a substantially rigid inner guide member and a movable shaft coupled to a balloon that is slidably mounted on the substantially rigid inner guide member. To treat a sinus cavity of a subject using the balloon dilation the substantially rigid inner guide member is advanced into a drainage pathway of the sinus (e.g., frontal recess) of the subject via a nasal passageway. The shaft and balloon are advanced in a distal direction over the substantially rigid inner guide member to place the balloon in the drainage pathway. The balloon is inflated to expand or otherwise remodel the drainage pathway.

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 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 medical device for the treatment and irrigation of a sinus opening is described. The device allows for single-handed operation to access, dilate and irrigate a sinus opening. The device includes a sinus guide catheter, a guiding element, a balloon dilation catheter, a balloon catheter movement mechanism and a guiding element movement mechanism. A method for treating a sinus opening and irrigating a sinus is also described.

A balloon dilatation catheter for use in a valvuloplasty procedure includes a catheter shaft and a spiral perfusion balloon mounted thereon. The perfusion balloon is formed from an inflatable tube that is in fluid communication with a catheter shaft inflation lumen. The inflatable tube is coiled into a series of windings that in an inflated configuration form a cylindrical or hourglass profile. In the inflated configuration, inner surfaces of the coiled windings of the inflatable tube define a perfusion lumen to allow blood flow through the perfusion balloon. Adjacent windings may be secured together with a flexible adhesive and / or a support weave formed from one or more filaments of material that criss-crosses between the adjacent windings along substantially the entire length of the spiral perfusion balloon.

A method of treating a sinus cavity of a subject includes advancing a distal portion of a light source through a drainage pathway of a sinus cavity and into the sinus cavity and visually observing a transdermal light emitted from the light source. A distal portion of a substantially rigid inner guide member of a balloon dilation catheter is advanced into the drainage pathway, the balloon dilation catheter including a movable shaft including a balloon that is slidably mounted on the substantially rigid inner guide member. The movable shaft and balloon are advanced distally over the substantially rigid inner guide member to place a portion of the balloon in the drainage pathway whereby the balloon is inflated.

Multi-lumen balloons for use as or in conjunction with balloon dilation catheters, and methods for making such balloons, are disclosed.

A balloon dilation catheter includes a substantially rigid inner guide member and a movable shaft coupled to a balloon that is slidably mounted on the substantially rigid inner guide member. To treat a sinus cavity of a subject using the balloon dilation the substantially rigid inner guide member is advanced into a drainage pathway of the sinus (e.g., frontal recess or maxillary sinus) of the subject via a nasal passageway. The shaft and balloon are advanced in a distal direction over the substantially rigid inner guide member to place the balloon in the drainage pathway. The balloon is inflated to expand or otherwise remodel the drainage pathway.

The present invention generally relates to a medical device and procedure for accurately positioning a catheter across a desired region within a patient's vasculature. In particular, the present invention provides a hub assembly unit that allows a physician to precisely position a stent within a vessel utilizing a stent delivery catheter. The hub assembly unit includes a fine adjustment mechanism. The fine adjustment mechanism extends or contracts the length of the hub assembly unit in controlled incremental units. These controlled fine displacements are then translated directly to the stent delivery or balloon dilation catheter.

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 relates to a method for preparing a balloon dilatation catheter medicinal coating for treatment. The method comprises the following steps: adding a diluted solvent into a glass bottle filled with a medicine for treating vascular endothelial re-proliferation, oscillating to completely dissolve the medicine to prepare a medicine solution; mixing the medicine solution and an interference solvent which is incompatible with the medicine, and feeding into a dual-channel ultrasonic nozzle to coat a balloon dilatation catheter; drying, sterilizing and packaging the coated balloon dilatation catheter. According to the method, the medicine solution is mixed with another incompatible interference solvent before ultrasonic coating, so that the shape of the medicine in the solution is changed, and the mixture is fed into the ultrasonic nozzle to perform ultrasonic coating to achieve the aims of controlling the coating granularity, increasing the coating binding force and controlling the releasing rate of the medicine. The medicine coating formed by the method has the characteristics of uniformity, strong binding force with balloon, controllable crystal granularity, durable drug effect and the like.

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.

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 relates a medicine-carrying cutting balloon dilating catheter. The medicine-carrying cutting balloon dilating catheter comprises a cutting balloon dilating catheter body and a medicine coating, wherein the cutting balloon dilating catheter body comprises a balloon, the surface of the balloon is provided with a plurality of blades, and the medicine coating is coated on the surfaces of the balloon and the blades. The medicine-carrying cutting balloon dilating catheter can cut plaques in vessels and fully dilate to be well adhered to arterial walls by pressing the plaques, so that not only subsequent inflammatory responses are reduced, but also the dilation of lumen reduces the restenosis rate. Besides, the medicine coating can restrain the intimal hyperplasia of the vessel inner surface which is damaged by squeezing. Particularly for a bended complex lesion location where a stent cannot reach, the superior advantages of the medicine-carrying cutting balloon dilating catheter are significant.

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.