52 results about "Ostium" patented technology

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.

A catheter configured to guide and support a balloon catheter for use in and around a pulmonary vein and its ostium, has an elongated shaft and a distal assembly, the elongated shaft including a proximal portion with a first flexibility and a distal portion including a second flexibility greater than the first flexibility, the distal assembly including an elbow portion and a generally circular portion generally transverse to the longitudinal axis, the generally circular portion including a third flexibility greater than the second flexibility. Single axis location sensors and sensing ring electrodes are carried on the generally circular portion.

The present disclosure relates to methods of treating a patient that has a low coronary ostia height. The methods can involve advancing a heart valve prosthesis to a native valve structure having an ostium and positioning the prosthesis to align a gap between major peaks of the prosthesis with the ostium to avoid obstruction of the ostium. The presently disclosed methods and prostheses can be effective at treating patients with a coronary ostia height of as low as 10 mm, 8 mm, 6 mm, or less.

A method for providing primary therapy to restore functional blood flow to a back of an eye may include advancing a guidewire through an access site in a subject to an ostium of an ophthalmic artery (OA) via an internal carotid artery (ICA), advancing a microcatheter to the ostium of the OA, retracting the guidewire into the microcatheter, such that a distal tip of the microcatheter assumes a pre-shaped configuration, advancing the microcatheter to cannulate a short limb of the OA, advancing the guidewire to a position approximately at or beyond a central carotid artery (CRA) branch of the OA, removing the microcatheter, advancing a treatment device over the guidewire to a lesion site in the OA of the subject, performing a treatment with the treatment device, and removing the treatment device and the guidewire from the subject.

Apparatuses and methods for quickly and accurately positioning a stent within the ostium of a blood vessel so that the entire circumference of the proximal stent edge is within the aorto-ostial landing zone (AOLZ). Any of these methods and apparatuses may include an ostial positioning catheter including an annular sealing balloon, a distal reinforced shaft, and a hypotube extending proximally from a longitudinal side of the distal reinforced shaft. These ostial positioning catheters may be independently operated with a guide catheter and a stent deployment catheter.

Apparatus and methods are described including a catheter ultrasound transducer that includes one or more piezoelectric elements configured to ablate tissue of an ostium of a blood vessel by applying ultrasound energy to tissue of the ostium. An expandable positioner is configured to envelope at least a portion of the catheter ultrasound transducer and to position the catheter ultrasound transducer in the ostium of the blood vessel by contacting a wall of the blood vessel. A system processor in communication with the one or more piezoelectric elements is configured to regulate a parameter of the ultrasound energy emitted from the one or more piezoelectric elements based on impedance measurement between one or more electrodes located on the expandable positioner and one or more electrodes located on the catheter ultrasound transducer. Other applications are also described.

A method of treating an ophthalmic artery lesion, includes: advancing a distal end of a guidewire inside a patient into an ophthalmic artery through an ostium of the ophthalmic artery until the distal end of the guidewire passes a lesion in the ophthalmic artery; advancing a microcatheter over the guidewire until a distal end of the microcatheter is in the ophthalmic artery; removing the guidewire from within the microcatheter while the distal end of the microcatheter is in the ophthalmic artery; advancing a balloon catheter inside the microcatheter, wherein the balloon catheter comprises a balloon, and wherein the balloon catheter is without any guidewire lumen; deploying the balloon of the balloon catheter outside the microcatheter; and expanding the balloon to press against the lesion in the ophthalmic artery to create a compressed lesion.

Apparatus and methods are described including positioning an ultrasound transducer at a blood vessel ostium, rotating the transducer about its axis and scanning tissue of the blood vessel ostium, recording one or more baseline returned signals from the tissue, and creating a baseline image of the blood vessel ostium based on at least one of the returned signals. Tissue of the blood vessel ostium is ablated in consecutive segments by rotating the transducer segmentally until full rotation is completed. The returned signals of the ablated segments are recorded in real-time and a real-time image is created based on the one or more returned signals. Ablation is terminated after changes in the real-time returned signals and / or real-time image with respect to the baseline returned signals and / or baseline image indicate an achieved predetermined level of ablation lesion formation. Other applications are also described.

A neurovascular catheter for delivery through an aorta and into an ostium can include a tubular body between a proximal end to a distal end. The tubular body can have a length of 140 cm to 180 cm, a 5Fr size, and an internal diameter of about 0.065" to about 0.067". The tubular body can include a proximal portion and a distal portion. The distal portion can include a polymer layer and a layer of braids. The proximal portion can include a hypotube and the layer of braids.

Disclosed herein are pulmonary vein isolation catheters and related devices, systems, and methods. In some implementations, a pulmonary vein isolation catheter includes a tip portion having an expandable portion and a deployment member. The expandable portion includes a plurality of mesh electrode pads that are electrically insulated from one another. The expandable portion is mechanically coupled to (i) the deployment member at a distal-most portion of the tip portion and (ii) a distal end portion of a catheter shaft. The expandable portion is expandable and compressible via proximal and distal movement of the deployment member, respectively. In some embodiments, the expandable portion in a deployed state is pear-shaped or onion-shaped and includes a nose portion and / or an active body portion. The nose portion can be insulated and / or configured to fit within a pulmonary vein and set a position of the active body portion against tissue around a pulmonary vein ostium.

A transcatheter valve apparatus includes a valve prosthesis including a plurality of prosthetic leaflets attached to a frame. The transcatheter valve apparatus includes an attachment structure positioned within the valve prosthesis. The attachment structure is attached to a first leaflet of the plurality of prosthetic leaflets and attached to a second leaflet of the plurality of prosthetic leaflets. The attachment structure maintains the first leaflet in a fixed position relative to the second leaflet such that the plurality of prosthetic leaflets are offset from a first ostia and a second ostia. The transcatheter valve apparatus includes a second valve prosthesis including a plurality of second prosthetic leaflets attached to a second frame. The second valve prosthesis is positioned within the valve prosthesis radially inward from the attachment structure. Method of providing access to one or more ostia are provided.

A method of treating a tissue of the heart, for example and without limitation, a tissue of the left atrial appendage, includes twisting at least a portion of a tissue of the left atrial appendage to constrict an ostium of the left atrial appendage, and ablating at least a portion of the tissue of the heart, which can include a tissue of the left atrial appendage, the ostium of the left atrial appendage, and / or at least a portion of a tissue adjacent to the ostium of the left atrial appendage.

Apparatuses and methods for quickly and accurately positioning a stent within the ostium of a blood vessel so that the entire circumference of the proximal stent edge is within the aorto-ostial landing zone (AOLZ). Any of these methods and apparatuses may include an ostial positioning catheter including an annular sealing balloon, a distal reinforced shaft, and a hypotube extending proximally from a longitudinal side of the distal reinforced shaft. These ostial positioning catheters may be independently operated with a guide catheter and a stent deployment catheter.

A method of robotically controlling an interventional device includes: providing an interventional device assembly having a plurality of interventional devices; advancing, in a first mode of operation, a first subset of the plurality of interventional devices into the mouth of the descending aorta in response to movement of a control of the controller, where the first subset of the plurality of interventional devices is connected to the control in the first mode of operation; and switching from the first operating mode to the second operating mode in response to a user input using the controller. Switching from the first mode of operation to the second mode of operation causes a second subset of the plurality of interventional devices to be connected to the control of the controller. The method also includes advancing a second subset of the plurality of interventional devices to the treatment site in a second mode of operation.

Apparatuses and methods for quickly and accurately positioning a stent within the ostium of a blood vessel so that the entire circumference of the proximal stent edge is within the aorto-ostial landing zone (AOLZ). Any of these methods and apparatuses may include an ostial positioning catheter including an annular sealing balloon, a distal reinforced shaft, and a hypotube extending proximally from a longitudinal side of the distal reinforced shaft. These ostial positioning catheters may be independently operated with a guide catheter and a stent deployment catheter.

CLOT PROCESSING SYSTEMS, AND ASSOCIATED DEVICES AND METHODS, are disclosed herein. In some embodiments, a clot treatment system includes a catheter having a shaped distal portion configured to enter a left atrial appendage of a patient. The shaped distal portion of the catheter may be aligned with and / or positioned within the patient's left atrial appendage and used to aspirate clot material therefrom. The clot treatment system may also include a clot capture device configured to at least partially cover the opening of the left atrial appendage. For example, the clot capture device may be aligned with, positioned against, and / or inserted at least partially through an aperture of a left auricle of the patient to capture any clot material detached from the left auricle.

A delivery sheath can comprise an elongate tubular member and an anchor on a distal portion of the elongate tubular member, the anchor being configured to engage with the coronary sinus ostium, or both the coronary sinus ostium and a portion of the coronary sinus adjacent to the ostium, so as to provide stable transcatheter access into the coronary sinus. The anchor can be configured to permit blood flow through the ostium while in engagement with the ostium.

A method may include accessing an artery in communication with an ophthalmic artery of a subject, and advancing a microcatheter along the accessed artery so as to align a distal end of the microcatheter with an ostium of the ophthalmic artery, wherein the microcatheter includes a lumen having a guidewire positioned therein. In addition, the method includes proximally withdrawing the guidewire relative to the microcatheter so as to enable a distal portion of the microcatheter to assume a curved relaxed configuration, and cannulating the ostium with the distal portion of the microcatheter when the distal portion is in the curved relaxed configuration.

Disclosed in the present invention are a high-precision hemostatic balloon and system, which relate to the technical field of medical devices. The high-precision hemostatic balloon is used for uterine cavity hemostasis and comprises a balloon assembly and a catheter assembly. The balloon assembly comprises an intrauterine hemostasis balloon and an intravaginal fixing balloon. The intrauterine hemostasis balloon comprises a middle balloon mainly used for compressing front and rear walls of the uterus, and left and right side balloons mainly used for compressing left and right side walls of the uterus. The three balloons form a flat inverted pear shape with a wide top and a narrow bottom, and front and rear diameters being smaller than left and right diameters. The intravaginal fixing balloon is clamped and fixed in the vaginal fornix and surrounds the cervix after expansion, and the internal cervical orifice is closed while the intrauterine hemostasis balloon is lifted. The catheter assembly is used for draining accumulated blood and performing fluid filling and drainage on the balloon assembly. By utilizing the characteristics of the vaginal fornix at the cervix ostium, the present invention provides the intravaginal fixing balloon to lift the hemostasis balloon and close the internal cervical orifice. In addition, the use of a multi-cavity hemostasis balloon improves the regional compression precision of the balloon.

To provide a vibrating endoscopic catheter for suitable tubal advancement.SOLUTION: A falloposcope intended for use with a hysteroscope to access a patient's fallopian tube, image the fallopian tube, and collect a sample from the fallopian tube includes a cannula having an angled tip oriented to engage the ostium of the fallopian tube when the cannula is trans-cervically introduced into the uterus of the patient through the hysteroscope. The catheter has a distal viewing tip configured to be advanced from the distal end of the cannula through the cervical os and into the uterus of the patient. The viewing chamber has a wide proximal end that is attached to the distal viewing tip of the catheter, and the viewing chamber is at least partially transparent and typically tapers distally in order to provide a clear viewing area for the endoscope as well as atraumatic advancement into the fallopian tube.SELECTED DRAWING: Figure 6

The present disclosure relates to methods of treating a patient that has a low coronary ostia height. The methods can involve advancing a heart valve prosthesis to a native valve structure having an ostium and positioning the prosthesis to align a gap between major peaks of the prosthesis with the ostium to avoid obstruction of the ostium. The presently disclosed methods and prostheses can be effective at treating patients with a coronary ostia height of as low as 10 mm, 8 mm, 6 mm, or less.

A kit for assembling a collapsible and expandable occluder for occluding a left atrial appendage (“LAA”) may include a plurality of proximal discs and a plurality of distal lobes. Each proximal disc may be configured to cover an ostium of the LAA in an implanted condition of the occluder, and each of the plurality of proximal discs may have a different diameter in an expanded condition than other ones of the plurality of proximal discs. Each distal lobe may be configured to be received within a cavity of the LAA in the implanted condition of the occluder, and each of the plurality of distal lobes may have a different diameter in an expanded condition than other ones of the plurality of proximal discs. Each of the plurality of proximal discs may be configured to couple to any one of the plurality of distal lobes to form the occluder.

A method, system and device for implanting an electrode assembly of an implantable medical device in a patient's heart. Positioning one or more radiopaque markers in a coronary sinus of the patient's heart. Positioning, by using the one or more positioned radiopaque markers as a fluoroscopic visual reference, a distal tip of a delivery catheter within a right atrium of the patient's heart so that a distal opening of a lumen of the catheter is against a septal wall of the heart at a location between the ostium of the coronary sinus and the A-V nodal area of the right atrium, and so that the tip of the catheter is generally directed toward a left ventricle of the patient's heart. Advancing the electrode assembly through the lumen of the catheter and into the septal wall.

The animated GUI is an information display image displayed on the screen of an information terminal. The GUI displays a blood vessel and a catheter inserted through the ostium of the vessel, is generated based on data obtained from the device, and allows the user to verify correct placement of the catheter. Additionally, electrodes positioned around the catheter's circumference and the shape of the blood vessel at specific locations are highlighted to confirm proper contact of each electrode with the tissue. The design is characterized by a combination of the shape, position, and contrast of the graphical elements. The design is displayed in grayscale. Protection is not sought for the specific color of the design. The red-colored area within the dashed line in the design view indicates the portion of the graphical user interface that does not form part of the design sought to be registered. Figure 3.1 shows the first image in a sequence of a graphical user interface for a display screen or portion thereof. Figure 3.2 shows the second image. 3.1) Front View; 3.2) Front View

A fenestrated graft deployment system, with a delivery catheter having a catheter body. An endoluminal prosthesis having a main graft body, the main graft body having a lumen therethrough and a first opening laterally through a wall of the main graft body. A first guidewire prepositioned within the delivery catheter extending through at least a portion of the catheter body into a main lumen of the endoluminal prosthesis and through the first opening in the wall of the prosthesis when the delivery catheter is in a predeployed configuration. A first fenestration alignment device is configured to extend through at least a portion of the delivery catheter and is configured to be axially moveable relative to the first guidewire. The first fenestration alignment device has an end portion having an outside perimeter configured such that when an end portion of the fenestration alignment device moves toward the first opening of said main graft body the outside perimeter of the first opening is smaller than the outside perimeter of the first fenestration alignment device and prevents it from passing through the first opening and causes the main graft body adjacent to the first opening to move with the end of the first fenestration alignment device to act as alignment tool to allow an operator to align the first opening in the side of the endoluminal prosthesis with an ostium of a target branch vessel into which said first opening is to extend and act as a guide and seal for a subsequently delivered branch graft endoluminal prosthesis.

According to one aspect of the disclosure, a collapsible and expandable medical device for occluding a left atrial appendage (“LAA”), includes a proximal disc, a distal lobe, and a connecting member. The proximal disc may be configured to cover an ostium of the LAA in an implanted condition of the medical device. The distal lobe may be configured to be received within a cavity of the LAA in the implanted condition of the medical device. The distal lobe may include a central longitudinal axis extending therethrough in an expanded condition of the medical device. The connecting member may connect the proximal disc to the distal lobe. In the expanded condition of the medical device, the proximal disc may not be radially symmetric about the central longitudinal axis of the distal lobe.

A left atrial appendage (LAA) ligation device is adapted for ligating the LAA via a trans-septal approach, the LAA including an ostium. The LAA ligation device includes a spiral ligation element extending from an end point disposed at a periphery of the spiral ligation element to a center point of the spiral ligation element, the spiral ligation element having a diameter defined by the periphery and a length defined between the periphery and the center point. A delivery device is adapted to releasably secure the spiral ligation element and to enable rotation of the spiral ligation device.

Apparatuses and methods for quickly and accurately positioning a stent within the ostium of a blood vessel so that the entire circumference of the proximal stent edge is within the aorto-ostial landing zone (AOLZ). Any of these methods and apparatuses may include an ostial positioning catheter including an annular sealing balloon, a distal reinforced shaft, and a hypotube extending proximally from a longitudinal side of the distal reinforced shaft. These ostial positioning catheters may be independently operated with a guide catheter and a stent deployment catheter.

A method may include accessing an artery in communication with an ophthalmic artery of a subject, and advancing a microcatheter along the accessed artery so as to align a distal end of the microcatheter with an ostium of the ophthalmic artery, wherein the microcatheter includes a lumen having a guidewire positioned therein. In addition, the method includes proximally withdrawing the guidewire relative to the microcatheter so as to enable a distal portion of the microcatheter to assume a curved relaxed configuration, and cannulating the ostium with the distal portion of the microcatheter when the distal portion is in the curved relaxed configuration.

The present invention belongs to the technical field of medical devices, and particularly relates to a delivery device for an atrial septal shunt based on electric control, comprising an inner core tube assembly, an inner sheath tube, an outer sheath tube, an electric control assembly and a handle. The electric control assembly is installed in the handle, the outer sheath tube is connected to the handle, the proximal ends of the inner core tube assembly and the inner sheath tube are respectively connected to the electric control assembly, the inner core tube assembly is slidably fitted in the inner sheath tube, and the inner sheath tube is slidably fitted in the outer sheath tube; by controlling the electric control assembly to adjust the forward and backward feeding of the inner core tube assembly and the inner sheath tube, and by using the handle to adjust the curvature of the outer sheath tube, so as to realize the delivery of the shunt to the atrial septal ostium; the present invention can improve the positioning accuracy by automatically adjusting the delivery position, and at the same time can also achieve precise positioning through manual micro-adjustment, so that the shunt is released precisely and the operation is convenient.